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<h1>prj.h</h1><a href="prj_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*============================================================================</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> WCSLIB 4.8 - an implementation of the FITS WCS standard.</span>
<a name="l00004"></a>00004 <span class="comment"> Copyright (C) 1995-2011, Mark Calabretta</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> This file is part of WCSLIB.</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> WCSLIB is free software: you can redistribute it and/or modify it under the</span>
<a name="l00009"></a>00009 <span class="comment"> terms of the GNU Lesser General Public License as published by the Free</span>
<a name="l00010"></a>00010 <span class="comment"> Software Foundation, either version 3 of the License, or (at your option)</span>
<a name="l00011"></a>00011 <span class="comment"> any later version.</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment"> WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY</span>
<a name="l00014"></a>00014 <span class="comment"> WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS</span>
<a name="l00015"></a>00015 <span class="comment"> FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for</span>
<a name="l00016"></a>00016 <span class="comment"> more details.</span>
<a name="l00017"></a>00017 <span class="comment"></span>
<a name="l00018"></a>00018 <span class="comment"> You should have received a copy of the GNU Lesser General Public License</span>
<a name="l00019"></a>00019 <span class="comment"> along with WCSLIB. If not, see <http://www.gnu.org/licenses/>.</span>
<a name="l00020"></a>00020 <span class="comment"></span>
<a name="l00021"></a>00021 <span class="comment"> Correspondence concerning WCSLIB may be directed to:</span>
<a name="l00022"></a>00022 <span class="comment"> Internet email: mcalabre@atnf.csiro.au</span>
<a name="l00023"></a>00023 <span class="comment"> Postal address: Dr. Mark Calabretta</span>
<a name="l00024"></a>00024 <span class="comment"> Australia Telescope National Facility, CSIRO</span>
<a name="l00025"></a>00025 <span class="comment"> PO Box 76</span>
<a name="l00026"></a>00026 <span class="comment"> Epping NSW 1710</span>
<a name="l00027"></a>00027 <span class="comment"> AUSTRALIA</span>
<a name="l00028"></a>00028 <span class="comment"></span>
<a name="l00029"></a>00029 <span class="comment"> Author: Mark Calabretta, Australia Telescope National Facility</span>
<a name="l00030"></a>00030 <span class="comment"> http://www.atnf.csiro.au/~mcalabre/index.html</span>
<a name="l00031"></a>00031 <span class="comment"> $Id: prj.h,v 4.8.1.1 2011/08/15 08:07:06 cal103 Exp cal103 $</span>
<a name="l00032"></a>00032 <span class="comment">*=============================================================================</span>
<a name="l00033"></a>00033 <span class="comment">*</span>
<a name="l00034"></a>00034 <span class="comment">* WCSLIB 4.8 - C routines that implement the spherical map projections</span>
<a name="l00035"></a>00035 <span class="comment">* recognized by the FITS World Coordinate System (WCS) standard. Refer to</span>
<a name="l00036"></a>00036 <span class="comment">*</span>
<a name="l00037"></a>00037 <span class="comment">* "Representations of world coordinates in FITS",</span>
<a name="l00038"></a>00038 <span class="comment">* Greisen, E.W., & Calabretta, M.R. 2002, A&A, 395, 1061 (Paper I)</span>
<a name="l00039"></a>00039 <span class="comment">*</span>
<a name="l00040"></a>00040 <span class="comment">* "Representations of celestial coordinates in FITS",</span>
<a name="l00041"></a>00041 <span class="comment">* Calabretta, M.R., & Greisen, E.W. 2002, A&A, 395, 1077 (Paper II)</span>
<a name="l00042"></a>00042 <span class="comment">*</span>
<a name="l00043"></a>00043 <span class="comment">* Refer to the README file provided with WCSLIB for an overview of the</span>
<a name="l00044"></a>00044 <span class="comment">* library.</span>
<a name="l00045"></a>00045 <span class="comment">*</span>
<a name="l00046"></a>00046 <span class="comment">*</span>
<a name="l00047"></a>00047 <span class="comment">* Summary of the prj routines</span>
<a name="l00048"></a>00048 <span class="comment">* ---------------------------</span>
<a name="l00049"></a>00049 <span class="comment">* These routines implement the spherical map projections defined by the FITS</span>
<a name="l00050"></a>00050 <span class="comment">* WCS standard. They are based on the prjprm struct which contains all</span>
<a name="l00051"></a>00051 <span class="comment">* information needed for the computations. The struct contains some members</span>
<a name="l00052"></a>00052 <span class="comment">* that must be set by the user, and others that are maintained by these</span>
<a name="l00053"></a>00053 <span class="comment">* routines, somewhat like a C++ class but with no encapsulation.</span>
<a name="l00054"></a>00054 <span class="comment">*</span>
<a name="l00055"></a>00055 <span class="comment">* Routine prjini() is provided to initialize the prjprm struct with default</span>
<a name="l00056"></a>00056 <span class="comment">* values, prjfree() reclaims any memory that may have been allocated to store</span>
<a name="l00057"></a>00057 <span class="comment">* an error message, and prjprt() prints its contents.</span>
<a name="l00058"></a>00058 <span class="comment">*</span>
<a name="l00059"></a>00059 <span class="comment">* Setup routines for each projection with names of the form ???set(), where</span>
<a name="l00060"></a>00060 <span class="comment">* "???" is the down-cased three-letter projection code, compute intermediate</span>
<a name="l00061"></a>00061 <span class="comment">* values in the prjprm struct from parameters in it that were supplied by the</span>
<a name="l00062"></a>00062 <span class="comment">* user. The struct always needs to be set by the projection's setup routine</span>
<a name="l00063"></a>00063 <span class="comment">* but that need not be called explicitly - refer to the explanation of</span>
<a name="l00064"></a>00064 <span class="comment">* prjprm::flag.</span>
<a name="l00065"></a>00065 <span class="comment">*</span>
<a name="l00066"></a>00066 <span class="comment">* Each map projection is implemented via separate functions for the spherical</span>
<a name="l00067"></a>00067 <span class="comment">* projection, ???s2x(), and deprojection, ???x2s().</span>
<a name="l00068"></a>00068 <span class="comment">*</span>
<a name="l00069"></a>00069 <span class="comment">* A set of driver routines, prjset(), prjx2s(), and prjs2x(), provides a</span>
<a name="l00070"></a>00070 <span class="comment">* generic interface to the specific projection routines which they invoke</span>
<a name="l00071"></a>00071 <span class="comment">* via pointers-to-functions stored in the prjprm struct.</span>
<a name="l00072"></a>00072 <span class="comment">*</span>
<a name="l00073"></a>00073 <span class="comment">* In summary, the routines are:</span>
<a name="l00074"></a>00074 <span class="comment">* - prjini() Initialization routine for the prjprm struct.</span>
<a name="l00075"></a>00075 <span class="comment">* - prjprt() Routine to print the prjprm struct.</span>
<a name="l00076"></a>00076 <span class="comment">*</span>
<a name="l00077"></a>00077 <span class="comment">* - prjset(), prjx2s(), prjs2x(): Generic driver routines</span>
<a name="l00078"></a>00078 <span class="comment">*</span>
<a name="l00079"></a>00079 <span class="comment">* - azpset(), azpx2s(), azps2x(): AZP (zenithal/azimuthal perspective)</span>
<a name="l00080"></a>00080 <span class="comment">* - szpset(), szpx2s(), szps2x(): SZP (slant zenithal perspective)</span>
<a name="l00081"></a>00081 <span class="comment">* - tanset(), tanx2s(), tans2x(): TAN (gnomonic)</span>
<a name="l00082"></a>00082 <span class="comment">* - stgset(), stgx2s(), stgs2x(): STG (stereographic)</span>
<a name="l00083"></a>00083 <span class="comment">* - sinset(), sinx2s(), sins2x(): SIN (orthographic/synthesis)</span>
<a name="l00084"></a>00084 <span class="comment">* - arcset(), arcx2s(), arcs2x(): ARC (zenithal/azimuthal equidistant)</span>
<a name="l00085"></a>00085 <span class="comment">* - zpnset(), zpnx2s(), zpns2x(): ZPN (zenithal/azimuthal polynomial)</span>
<a name="l00086"></a>00086 <span class="comment">* - zeaset(), zeax2s(), zeas2x(): ZEA (zenithal/azimuthal equal area)</span>
<a name="l00087"></a>00087 <span class="comment">* - airset(), airx2s(), airs2x(): AIR (Airy)</span>
<a name="l00088"></a>00088 <span class="comment">* - cypset(), cypx2s(), cyps2x(): CYP (cylindrical perspective)</span>
<a name="l00089"></a>00089 <span class="comment">* - ceaset(), ceax2s(), ceas2x(): CEA (cylindrical equal area)</span>
<a name="l00090"></a>00090 <span class="comment">* - carset(), carx2s(), cars2x(): CAR (Plate carree)</span>
<a name="l00091"></a>00091 <span class="comment">* - merset(), merx2s(), mers2x(): MER (Mercator)</span>
<a name="l00092"></a>00092 <span class="comment">* - sflset(), sflx2s(), sfls2x(): SFL (Sanson-Flamsteed)</span>
<a name="l00093"></a>00093 <span class="comment">* - parset(), parx2s(), pars2x(): PAR (parabolic)</span>
<a name="l00094"></a>00094 <span class="comment">* - molset(), molx2s(), mols2x(): MOL (Mollweide)</span>
<a name="l00095"></a>00095 <span class="comment">* - aitset(), aitx2s(), aits2x(): AIT (Hammer-Aitoff)</span>
<a name="l00096"></a>00096 <span class="comment">* - copset(), copx2s(), cops2x(): COP (conic perspective)</span>
<a name="l00097"></a>00097 <span class="comment">* - coeset(), coex2s(), coes2x(): COE (conic equal area)</span>
<a name="l00098"></a>00098 <span class="comment">* - codset(), codx2s(), cods2x(): COD (conic equidistant)</span>
<a name="l00099"></a>00099 <span class="comment">* - cooset(), coox2s(), coos2x(): COO (conic orthomorphic)</span>
<a name="l00100"></a>00100 <span class="comment">* - bonset(), bonx2s(), bons2x(): BON (Bonne)</span>
<a name="l00101"></a>00101 <span class="comment">* - pcoset(), pcox2s(), pcos2x(): PCO (polyconic)</span>
<a name="l00102"></a>00102 <span class="comment">* - tscset(), tscx2s(), tscs2x(): TSC (tangential spherical cube)</span>
<a name="l00103"></a>00103 <span class="comment">* - cscset(), cscx2s(), cscs2x(): CSC (COBE spherical cube)</span>
<a name="l00104"></a>00104 <span class="comment">* - qscset(), qscx2s(), qscs2x(): QSC (quadrilateralized spherical cube)</span>
<a name="l00105"></a>00105 <span class="comment">* - hpxset(), hpxx2s(), hpxs2x(): HPX (HEALPix)</span>
<a name="l00106"></a>00106 <span class="comment">*</span>
<a name="l00107"></a>00107 <span class="comment">* Argument checking (projection routines):</span>
<a name="l00108"></a>00108 <span class="comment">* ----------------------------------------</span>
<a name="l00109"></a>00109 <span class="comment">* The values of phi and theta (the native longitude and latitude) normally lie</span>
<a name="l00110"></a>00110 <span class="comment">* in the range [-180,180] for phi, and [-90,90] for theta. However, all</span>
<a name="l00111"></a>00111 <span class="comment">* projection routines will accept any value of phi and will not normalize it.</span>
<a name="l00112"></a>00112 <span class="comment">*</span>
<a name="l00113"></a>00113 <span class="comment">* The projection routines do not explicitly check that theta lies within the</span>
<a name="l00114"></a>00114 <span class="comment">* range [-90,90]. They do check for any value of theta that produces an</span>
<a name="l00115"></a>00115 <span class="comment">* invalid argument to the projection equations (e.g. leading to division by</span>
<a name="l00116"></a>00116 <span class="comment">* zero). The projection routines for AZP, SZP, TAN, SIN, ZPN, and COP also</span>
<a name="l00117"></a>00117 <span class="comment">* return error 2 if (phi,theta) corresponds to the overlapped (far) side of</span>
<a name="l00118"></a>00118 <span class="comment">* the projection but also return the corresponding value of (x,y). This</span>
<a name="l00119"></a>00119 <span class="comment">* strict bounds checking may be relaxed at any time by setting prjprm::bounds</span>
<a name="l00120"></a>00120 <span class="comment">* to 0 (rather than 1); the projections need not be reinitialized.</span>
<a name="l00121"></a>00121 <span class="comment">*</span>
<a name="l00122"></a>00122 <span class="comment">* Argument checking (deprojection routines):</span>
<a name="l00123"></a>00123 <span class="comment">* ------------------------------------------</span>
<a name="l00124"></a>00124 <span class="comment">* Error checking on the projected coordinates (x,y) is limited to that</span>
<a name="l00125"></a>00125 <span class="comment">* required to ascertain whether a solution exists. Where a solution does</span>
<a name="l00126"></a>00126 <span class="comment">* exist no check is made that the value of phi and theta obtained lie within</span>
<a name="l00127"></a>00127 <span class="comment">* the ranges [-180,180] for phi, and [-90,90] for theta.</span>
<a name="l00128"></a>00128 <span class="comment">*</span>
<a name="l00129"></a>00129 <span class="comment">* Accuracy:</span>
<a name="l00130"></a>00130 <span class="comment">* ---------</span>
<a name="l00131"></a>00131 <span class="comment">* No warranty is given for the accuracy of these routines (refer to the</span>
<a name="l00132"></a>00132 <span class="comment">* copyright notice); intending users must satisfy for themselves their</span>
<a name="l00133"></a>00133 <span class="comment">* adequacy for the intended purpose. However, closure to a precision of at</span>
<a name="l00134"></a>00134 <span class="comment">* least 1E-10 degree of longitude and latitude has been verified for typical</span>
<a name="l00135"></a>00135 <span class="comment">* projection parameters on the 1 degree graticule of native longitude and</span>
<a name="l00136"></a>00136 <span class="comment">* latitude (to within 5 degrees of any latitude where the projection may</span>
<a name="l00137"></a>00137 <span class="comment">* diverge). Refer to the tprj1.c and tprj2.c test routines that accompany</span>
<a name="l00138"></a>00138 <span class="comment">* this software.</span>
<a name="l00139"></a>00139 <span class="comment">*</span>
<a name="l00140"></a>00140 <span class="comment">*</span>
<a name="l00141"></a>00141 <span class="comment">* prjini() - Default constructor for the prjprm struct</span>
<a name="l00142"></a>00142 <span class="comment">* ----------------------------------------------------</span>
<a name="l00143"></a>00143 <span class="comment">* prjini() sets all members of a prjprm struct to default values. It should</span>
<a name="l00144"></a>00144 <span class="comment">* be used to initialize every prjprm struct.</span>
<a name="l00145"></a>00145 <span class="comment">*</span>
<a name="l00146"></a>00146 <span class="comment">* Returned:</span>
<a name="l00147"></a>00147 <span class="comment">* prj struct prjprm*</span>
<a name="l00148"></a>00148 <span class="comment">* Projection parameters.</span>
<a name="l00149"></a>00149 <span class="comment">*</span>
<a name="l00150"></a>00150 <span class="comment">* Function return value:</span>
<a name="l00151"></a>00151 <span class="comment">* int Status return value:</span>
<a name="l00152"></a>00152 <span class="comment">* 0: Success.</span>
<a name="l00153"></a>00153 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00154"></a>00154 <span class="comment">*</span>
<a name="l00155"></a>00155 <span class="comment">*</span>
<a name="l00156"></a>00156 <span class="comment">* prjfree() - Destructor for the prjprm struct</span>
<a name="l00157"></a>00157 <span class="comment">* --------------------------------------------</span>
<a name="l00158"></a>00158 <span class="comment">* prjfree() frees any memory that may have been allocated to store an error</span>
<a name="l00159"></a>00159 <span class="comment">* message in the prjprm struct.</span>
<a name="l00160"></a>00160 <span class="comment">*</span>
<a name="l00161"></a>00161 <span class="comment">* Given:</span>
<a name="l00162"></a>00162 <span class="comment">* prj struct prjprm*</span>
<a name="l00163"></a>00163 <span class="comment">* Projection parameters.</span>
<a name="l00164"></a>00164 <span class="comment">*</span>
<a name="l00165"></a>00165 <span class="comment">* Function return value:</span>
<a name="l00166"></a>00166 <span class="comment">* int Status return value:</span>
<a name="l00167"></a>00167 <span class="comment">* 0: Success.</span>
<a name="l00168"></a>00168 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00169"></a>00169 <span class="comment">*</span>
<a name="l00170"></a>00170 <span class="comment">*</span>
<a name="l00171"></a>00171 <span class="comment">* prjprt() - Print routine for the prjprm struct</span>
<a name="l00172"></a>00172 <span class="comment">* ----------------------------------------------</span>
<a name="l00173"></a>00173 <span class="comment">* prjprt() prints the contents of a prjprm struct using wcsprintf(). Mainly</span>
<a name="l00174"></a>00174 <span class="comment">* intended for diagnostic purposes.</span>
<a name="l00175"></a>00175 <span class="comment">*</span>
<a name="l00176"></a>00176 <span class="comment">* Given:</span>
<a name="l00177"></a>00177 <span class="comment">* prj const struct prjprm*</span>
<a name="l00178"></a>00178 <span class="comment">* Projection parameters.</span>
<a name="l00179"></a>00179 <span class="comment">*</span>
<a name="l00180"></a>00180 <span class="comment">* Function return value:</span>
<a name="l00181"></a>00181 <span class="comment">* int Status return value:</span>
<a name="l00182"></a>00182 <span class="comment">* 0: Success.</span>
<a name="l00183"></a>00183 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00184"></a>00184 <span class="comment">*</span>
<a name="l00185"></a>00185 <span class="comment">*</span>
<a name="l00186"></a>00186 <span class="comment">* prjset() - Generic setup routine for the prjprm struct</span>
<a name="l00187"></a>00187 <span class="comment">* ------------------------------------------------------</span>
<a name="l00188"></a>00188 <span class="comment">* prjset() sets up a prjprm struct according to information supplied within</span>
<a name="l00189"></a>00189 <span class="comment">* it.</span>
<a name="l00190"></a>00190 <span class="comment">*</span>
<a name="l00191"></a>00191 <span class="comment">* Note that this routine need not be called directly; it will be invoked by</span>
<a name="l00192"></a>00192 <span class="comment">* prjx2s() and prjs2x() if prj.flag is anything other than a predefined magic</span>
<a name="l00193"></a>00193 <span class="comment">* value.</span>
<a name="l00194"></a>00194 <span class="comment">*</span>
<a name="l00195"></a>00195 <span class="comment">* The one important distinction between prjset() and the setup routines for</span>
<a name="l00196"></a>00196 <span class="comment">* the specific projections is that the projection code must be defined in the</span>
<a name="l00197"></a>00197 <span class="comment">* prjprm struct in order for prjset() to identify the required projection.</span>
<a name="l00198"></a>00198 <span class="comment">* Once prjset() has initialized the prjprm struct, prjx2s() and prjs2x() use</span>
<a name="l00199"></a>00199 <span class="comment">* the pointers to the specific projection and deprojection routines contained</span>
<a name="l00200"></a>00200 <span class="comment">* therein.</span>
<a name="l00201"></a>00201 <span class="comment">*</span>
<a name="l00202"></a>00202 <span class="comment">* Given and returned:</span>
<a name="l00203"></a>00203 <span class="comment">* prj struct prjprm*</span>
<a name="l00204"></a>00204 <span class="comment">* Projection parameters.</span>
<a name="l00205"></a>00205 <span class="comment">*</span>
<a name="l00206"></a>00206 <span class="comment">* Function return value:</span>
<a name="l00207"></a>00207 <span class="comment">* int Status return value:</span>
<a name="l00208"></a>00208 <span class="comment">* 0: Success.</span>
<a name="l00209"></a>00209 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00210"></a>00210 <span class="comment">* 2: Invalid projection parameters.</span>
<a name="l00211"></a>00211 <span class="comment">*</span>
<a name="l00212"></a>00212 <span class="comment">* For returns > 1, a detailed error message is set in</span>
<a name="l00213"></a>00213 <span class="comment">* prjprm::err if enabled, see wcserr_enable().</span>
<a name="l00214"></a>00214 <span class="comment">*</span>
<a name="l00215"></a>00215 <span class="comment">*</span>
<a name="l00216"></a>00216 <span class="comment">* prjx2s() - Generic Cartesian-to-spherical deprojection</span>
<a name="l00217"></a>00217 <span class="comment">* ------------------------------------------------------</span>
<a name="l00218"></a>00218 <span class="comment">* Deproject Cartesian (x,y) coordinates in the plane of projection to native</span>
<a name="l00219"></a>00219 <span class="comment">* spherical coordinates (phi,theta).</span>
<a name="l00220"></a>00220 <span class="comment">*</span>
<a name="l00221"></a>00221 <span class="comment">* The projection is that specified by prjprm::code.</span>
<a name="l00222"></a>00222 <span class="comment">*</span>
<a name="l00223"></a>00223 <span class="comment">* Given and returned:</span>
<a name="l00224"></a>00224 <span class="comment">* prj struct prjprm*</span>
<a name="l00225"></a>00225 <span class="comment">* Projection parameters.</span>
<a name="l00226"></a>00226 <span class="comment">*</span>
<a name="l00227"></a>00227 <span class="comment">* Given:</span>
<a name="l00228"></a>00228 <span class="comment">* nx,ny int Vector lengths.</span>
<a name="l00229"></a>00229 <span class="comment">*</span>
<a name="l00230"></a>00230 <span class="comment">* sxy,spt int Vector strides.</span>
<a name="l00231"></a>00231 <span class="comment">*</span>
<a name="l00232"></a>00232 <span class="comment">* x,y const double[]</span>
<a name="l00233"></a>00233 <span class="comment">* Projected coordinates.</span>
<a name="l00234"></a>00234 <span class="comment">*</span>
<a name="l00235"></a>00235 <span class="comment">* Returned:</span>
<a name="l00236"></a>00236 <span class="comment">* phi,theta double[] Longitude and latitude (phi,theta) of the projected</span>
<a name="l00237"></a>00237 <span class="comment">* point in native spherical coordinates [deg].</span>
<a name="l00238"></a>00238 <span class="comment">*</span>
<a name="l00239"></a>00239 <span class="comment">* stat int[] Status return value for each vector element:</span>
<a name="l00240"></a>00240 <span class="comment">* 0: Success.</span>
<a name="l00241"></a>00241 <span class="comment">* 1: Invalid value of (x,y).</span>
<a name="l00242"></a>00242 <span class="comment">*</span>
<a name="l00243"></a>00243 <span class="comment">* Function return value:</span>
<a name="l00244"></a>00244 <span class="comment">* int Status return value:</span>
<a name="l00245"></a>00245 <span class="comment">* 0: Success.</span>
<a name="l00246"></a>00246 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00247"></a>00247 <span class="comment">* 2: Invalid projection parameters.</span>
<a name="l00248"></a>00248 <span class="comment">* 3: One or more of the (x,y) coordinates were</span>
<a name="l00249"></a>00249 <span class="comment">* invalid, as indicated by the stat vector.</span>
<a name="l00250"></a>00250 <span class="comment">*</span>
<a name="l00251"></a>00251 <span class="comment">* For returns > 1, a detailed error message is set in</span>
<a name="l00252"></a>00252 <span class="comment">* prjprm::err if enabled, see wcserr_enable().</span>
<a name="l00253"></a>00253 <span class="comment">*</span>
<a name="l00254"></a>00254 <span class="comment">*</span>
<a name="l00255"></a>00255 <span class="comment">* prjs2x() - Generic spherical-to-Cartesian projection</span>
<a name="l00256"></a>00256 <span class="comment">* ----------------------------------------------------</span>
<a name="l00257"></a>00257 <span class="comment">* Project native spherical coordinates (phi,theta) to Cartesian (x,y)</span>
<a name="l00258"></a>00258 <span class="comment">* coordinates in the plane of projection.</span>
<a name="l00259"></a>00259 <span class="comment">*</span>
<a name="l00260"></a>00260 <span class="comment">* The projection is that specified by prjprm::code.</span>
<a name="l00261"></a>00261 <span class="comment">*</span>
<a name="l00262"></a>00262 <span class="comment">* Given and returned:</span>
<a name="l00263"></a>00263 <span class="comment">* prj struct prjprm*</span>
<a name="l00264"></a>00264 <span class="comment">* Projection parameters.</span>
<a name="l00265"></a>00265 <span class="comment">*</span>
<a name="l00266"></a>00266 <span class="comment">* Given:</span>
<a name="l00267"></a>00267 <span class="comment">* nphi,</span>
<a name="l00268"></a>00268 <span class="comment">* ntheta int Vector lengths.</span>
<a name="l00269"></a>00269 <span class="comment">*</span>
<a name="l00270"></a>00270 <span class="comment">* spt,sxy int Vector strides.</span>
<a name="l00271"></a>00271 <span class="comment">*</span>
<a name="l00272"></a>00272 <span class="comment">* phi,theta const double[]</span>
<a name="l00273"></a>00273 <span class="comment">* Longitude and latitude (phi,theta) of the projected</span>
<a name="l00274"></a>00274 <span class="comment">* point in native spherical coordinates [deg].</span>
<a name="l00275"></a>00275 <span class="comment">*</span>
<a name="l00276"></a>00276 <span class="comment">* Returned:</span>
<a name="l00277"></a>00277 <span class="comment">* x,y double[] Projected coordinates.</span>
<a name="l00278"></a>00278 <span class="comment">*</span>
<a name="l00279"></a>00279 <span class="comment">* stat int[] Status return value for each vector element:</span>
<a name="l00280"></a>00280 <span class="comment">* 0: Success.</span>
<a name="l00281"></a>00281 <span class="comment">* 1: Invalid value of (phi,theta).</span>
<a name="l00282"></a>00282 <span class="comment">*</span>
<a name="l00283"></a>00283 <span class="comment">* Function return value:</span>
<a name="l00284"></a>00284 <span class="comment">* int Status return value:</span>
<a name="l00285"></a>00285 <span class="comment">* 0: Success.</span>
<a name="l00286"></a>00286 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00287"></a>00287 <span class="comment">* 2: Invalid projection parameters.</span>
<a name="l00288"></a>00288 <span class="comment">* 4: One or more of the (phi,theta) coordinates</span>
<a name="l00289"></a>00289 <span class="comment">* were, invalid, as indicated by the stat vector.</span>
<a name="l00290"></a>00290 <span class="comment">*</span>
<a name="l00291"></a>00291 <span class="comment">* For returns > 1, a detailed error message is set in</span>
<a name="l00292"></a>00292 <span class="comment">* prjprm::err if enabled, see wcserr_enable().</span>
<a name="l00293"></a>00293 <span class="comment">*</span>
<a name="l00294"></a>00294 <span class="comment">*</span>
<a name="l00295"></a>00295 <span class="comment">* ???set() - Specific setup routines for the prjprm struct</span>
<a name="l00296"></a>00296 <span class="comment">* --------------------------------------------------------</span>
<a name="l00297"></a>00297 <span class="comment">* Set up a prjprm struct for a particular projection according to information</span>
<a name="l00298"></a>00298 <span class="comment">* supplied within it.</span>
<a name="l00299"></a>00299 <span class="comment">*</span>
<a name="l00300"></a>00300 <span class="comment">* Given and returned:</span>
<a name="l00301"></a>00301 <span class="comment">* prj struct prjprm*</span>
<a name="l00302"></a>00302 <span class="comment">* Projection parameters.</span>
<a name="l00303"></a>00303 <span class="comment">*</span>
<a name="l00304"></a>00304 <span class="comment">* Function return value:</span>
<a name="l00305"></a>00305 <span class="comment">* int Status return value:</span>
<a name="l00306"></a>00306 <span class="comment">* 0: Success.</span>
<a name="l00307"></a>00307 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00308"></a>00308 <span class="comment">* 2: Invalid projection parameters.</span>
<a name="l00309"></a>00309 <span class="comment">*</span>
<a name="l00310"></a>00310 <span class="comment">* For returns > 1, a detailed error message is set in</span>
<a name="l00311"></a>00311 <span class="comment">* prjprm::err if enabled, see wcserr_enable().</span>
<a name="l00312"></a>00312 <span class="comment">*</span>
<a name="l00313"></a>00313 <span class="comment">*</span>
<a name="l00314"></a>00314 <span class="comment">* ???x2s() - Specific Cartesian-to-spherical deprojection routines</span>
<a name="l00315"></a>00315 <span class="comment">* ----------------------------------------------------------------</span>
<a name="l00316"></a>00316 <span class="comment">* Transform (x,y) coordinates in the plane of projection to native spherical</span>
<a name="l00317"></a>00317 <span class="comment">* coordinates (phi,theta).</span>
<a name="l00318"></a>00318 <span class="comment">*</span>
<a name="l00319"></a>00319 <span class="comment">* Given and returned:</span>
<a name="l00320"></a>00320 <span class="comment">* prj struct prjprm*</span>
<a name="l00321"></a>00321 <span class="comment">* Projection parameters.</span>
<a name="l00322"></a>00322 <span class="comment">*</span>
<a name="l00323"></a>00323 <span class="comment">* Given:</span>
<a name="l00324"></a>00324 <span class="comment">* nx,ny int Vector lengths.</span>
<a name="l00325"></a>00325 <span class="comment">*</span>
<a name="l00326"></a>00326 <span class="comment">* sxy,spt int Vector strides.</span>
<a name="l00327"></a>00327 <span class="comment">*</span>
<a name="l00328"></a>00328 <span class="comment">* x,y const double[]</span>
<a name="l00329"></a>00329 <span class="comment">* Projected coordinates.</span>
<a name="l00330"></a>00330 <span class="comment">*</span>
<a name="l00331"></a>00331 <span class="comment">* Returned:</span>
<a name="l00332"></a>00332 <span class="comment">* phi,theta double[] Longitude and latitude of the projected point in</span>
<a name="l00333"></a>00333 <span class="comment">* native spherical coordinates [deg].</span>
<a name="l00334"></a>00334 <span class="comment">*</span>
<a name="l00335"></a>00335 <span class="comment">* stat int[] Status return value for each vector element:</span>
<a name="l00336"></a>00336 <span class="comment">* 0: Success.</span>
<a name="l00337"></a>00337 <span class="comment">* 1: Invalid value of (x,y).</span>
<a name="l00338"></a>00338 <span class="comment">*</span>
<a name="l00339"></a>00339 <span class="comment">* Function return value:</span>
<a name="l00340"></a>00340 <span class="comment">* int Status return value:</span>
<a name="l00341"></a>00341 <span class="comment">* 0: Success.</span>
<a name="l00342"></a>00342 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00343"></a>00343 <span class="comment">* 2: Invalid projection parameters.</span>
<a name="l00344"></a>00344 <span class="comment">* 3: One or more of the (x,y) coordinates were</span>
<a name="l00345"></a>00345 <span class="comment">* invalid, as indicated by the stat vector.</span>
<a name="l00346"></a>00346 <span class="comment">*</span>
<a name="l00347"></a>00347 <span class="comment">* For returns > 1, a detailed error message is set in</span>
<a name="l00348"></a>00348 <span class="comment">* prjprm::err if enabled, see wcserr_enable().</span>
<a name="l00349"></a>00349 <span class="comment">*</span>
<a name="l00350"></a>00350 <span class="comment">*</span>
<a name="l00351"></a>00351 <span class="comment">* ???s2x() - Specific spherical-to-Cartesian projection routines</span>
<a name="l00352"></a>00352 <span class="comment">*---------------------------------------------------------------</span>
<a name="l00353"></a>00353 <span class="comment">* Transform native spherical coordinates (phi,theta) to (x,y) coordinates in</span>
<a name="l00354"></a>00354 <span class="comment">* the plane of projection.</span>
<a name="l00355"></a>00355 <span class="comment">*</span>
<a name="l00356"></a>00356 <span class="comment">* Given and returned:</span>
<a name="l00357"></a>00357 <span class="comment">* prj struct prjprm*</span>
<a name="l00358"></a>00358 <span class="comment">* Projection parameters.</span>
<a name="l00359"></a>00359 <span class="comment">*</span>
<a name="l00360"></a>00360 <span class="comment">* Given:</span>
<a name="l00361"></a>00361 <span class="comment">* nphi,</span>
<a name="l00362"></a>00362 <span class="comment">* ntheta int Vector lengths.</span>
<a name="l00363"></a>00363 <span class="comment">*</span>
<a name="l00364"></a>00364 <span class="comment">* spt,sxy int Vector strides.</span>
<a name="l00365"></a>00365 <span class="comment">*</span>
<a name="l00366"></a>00366 <span class="comment">* phi,theta const double[]</span>
<a name="l00367"></a>00367 <span class="comment">* Longitude and latitude of the projected point in</span>
<a name="l00368"></a>00368 <span class="comment">* native spherical coordinates [deg].</span>
<a name="l00369"></a>00369 <span class="comment">*</span>
<a name="l00370"></a>00370 <span class="comment">* Returned:</span>
<a name="l00371"></a>00371 <span class="comment">* x,y double[] Projected coordinates.</span>
<a name="l00372"></a>00372 <span class="comment">*</span>
<a name="l00373"></a>00373 <span class="comment">* stat int[] Status return value for each vector element:</span>
<a name="l00374"></a>00374 <span class="comment">* 0: Success.</span>
<a name="l00375"></a>00375 <span class="comment">* 1: Invalid value of (phi,theta).</span>
<a name="l00376"></a>00376 <span class="comment">*</span>
<a name="l00377"></a>00377 <span class="comment">* Function return value:</span>
<a name="l00378"></a>00378 <span class="comment">* int Status return value:</span>
<a name="l00379"></a>00379 <span class="comment">* 0: Success.</span>
<a name="l00380"></a>00380 <span class="comment">* 1: Null prjprm pointer passed.</span>
<a name="l00381"></a>00381 <span class="comment">* 2: Invalid projection parameters.</span>
<a name="l00382"></a>00382 <span class="comment">* 4: One or more of the (phi,theta) coordinates</span>
<a name="l00383"></a>00383 <span class="comment">* were, invalid, as indicated by the stat vector.</span>
<a name="l00384"></a>00384 <span class="comment">*</span>
<a name="l00385"></a>00385 <span class="comment">* For returns > 1, a detailed error message is set in</span>
<a name="l00386"></a>00386 <span class="comment">* prjprm::err if enabled, see wcserr_enable().</span>
<a name="l00387"></a>00387 <span class="comment">*</span>
<a name="l00388"></a>00388 <span class="comment">*</span>
<a name="l00389"></a>00389 <span class="comment">* prjprm struct - Projection parameters</span>
<a name="l00390"></a>00390 <span class="comment">* -------------------------------------</span>
<a name="l00391"></a>00391 <span class="comment">* The prjprm struct contains all information needed to project or deproject</span>
<a name="l00392"></a>00392 <span class="comment">* native spherical coordinates. It consists of certain members that must be</span>
<a name="l00393"></a>00393 <span class="comment">* set by the user ("given") and others that are set by the WCSLIB routines</span>
<a name="l00394"></a>00394 <span class="comment">* ("returned"). Some of the latter are supplied for informational purposes</span>
<a name="l00395"></a>00395 <span class="comment">* while others are for internal use only.</span>
<a name="l00396"></a>00396 <span class="comment">*</span>
<a name="l00397"></a>00397 <span class="comment">* int flag</span>
<a name="l00398"></a>00398 <span class="comment">* (Given and returned) This flag must be set to zero whenever any of the</span>
<a name="l00399"></a>00399 <span class="comment">* following prjprm struct members are set or changed:</span>
<a name="l00400"></a>00400 <span class="comment">*</span>
<a name="l00401"></a>00401 <span class="comment">* - prjprm::code,</span>
<a name="l00402"></a>00402 <span class="comment">* - prjprm::r0,</span>
<a name="l00403"></a>00403 <span class="comment">* - prjprm::pv[],</span>
<a name="l00404"></a>00404 <span class="comment">* - prjprm::phi0,</span>
<a name="l00405"></a>00405 <span class="comment">* - prjprm::theta0.</span>
<a name="l00406"></a>00406 <span class="comment">*</span>
<a name="l00407"></a>00407 <span class="comment">* This signals the initialization routine (prjset() or ???set()) to</span>
<a name="l00408"></a>00408 <span class="comment">* recompute the returned members of the prjprm struct. flag will then be</span>
<a name="l00409"></a>00409 <span class="comment">* reset to indicate that this has been done.</span>
<a name="l00410"></a>00410 <span class="comment">*</span>
<a name="l00411"></a>00411 <span class="comment">* Note that flag need not be reset when prjprm::bounds is changed.</span>
<a name="l00412"></a>00412 <span class="comment">*</span>
<a name="l00413"></a>00413 <span class="comment">* char code[4]</span>
<a name="l00414"></a>00414 <span class="comment">* (Given) Three-letter projection code defined by the FITS standard.</span>
<a name="l00415"></a>00415 <span class="comment">*</span>
<a name="l00416"></a>00416 <span class="comment">* double r0</span>
<a name="l00417"></a>00417 <span class="comment">* (Given) The radius of the generating sphere for the projection, a linear</span>
<a name="l00418"></a>00418 <span class="comment">* scaling parameter. If this is zero, it will be reset to its default</span>
<a name="l00419"></a>00419 <span class="comment">* value of 180/pi (the value for FITS WCS).</span>
<a name="l00420"></a>00420 <span class="comment">*</span>
<a name="l00421"></a>00421 <span class="comment">* double pv[30]</span>
<a name="l00422"></a>00422 <span class="comment">* (Given) Projection parameters. These correspond to the PVi_ma keywords</span>
<a name="l00423"></a>00423 <span class="comment">* in FITS, so pv[0] is PVi_0a, pv[1] is PVi_1a, etc., where i denotes the</span>
<a name="l00424"></a>00424 <span class="comment">* latitude-like axis. Many projections use pv[1] (PVi_1a), some also use</span>
<a name="l00425"></a>00425 <span class="comment">* pv[2] (PVi_2a) and SZP uses pv[3] (PVi_3a). ZPN is currently the only</span>
<a name="l00426"></a>00426 <span class="comment">* projection that uses any of the others.</span>
<a name="l00427"></a>00427 <span class="comment">*</span>
<a name="l00428"></a>00428 <span class="comment">* Usage of the pv[] array as it applies to each projection is described in</span>
<a name="l00429"></a>00429 <span class="comment">* the prologue to each trio of projection routines in prj.c.</span>
<a name="l00430"></a>00430 <span class="comment">*</span>
<a name="l00431"></a>00431 <span class="comment">* double phi0</span>
<a name="l00432"></a>00432 <span class="comment">* (Given) The native longitude, phi_0 [deg], and ...</span>
<a name="l00433"></a>00433 <span class="comment">* double theta0</span>
<a name="l00434"></a>00434 <span class="comment">* (Given) ... the native latitude, theta_0 [deg], of the reference point,</span>
<a name="l00435"></a>00435 <span class="comment">* i.e. the point (x,y) = (0,0). If undefined (set to a magic value by</span>
<a name="l00436"></a>00436 <span class="comment">* prjini()) the initialization routine will set this to a</span>
<a name="l00437"></a>00437 <span class="comment">* projection-specific default.</span>
<a name="l00438"></a>00438 <span class="comment">*</span>
<a name="l00439"></a>00439 <span class="comment">* int bounds</span>
<a name="l00440"></a>00440 <span class="comment">* (Given) Controls strict bounds checking for the AZP, SZP, TAN, SIN, ZPN,</span>
<a name="l00441"></a>00441 <span class="comment">* and COP projections; set to zero to disable checking.</span>
<a name="l00442"></a>00442 <span class="comment">*</span>
<a name="l00443"></a>00443 <span class="comment">* The remaining members of the prjprm struct are maintained by the setup</span>
<a name="l00444"></a>00444 <span class="comment">* routines and must not be modified elsewhere:</span>
<a name="l00445"></a>00445 <span class="comment">*</span>
<a name="l00446"></a>00446 <span class="comment">* char name[40]</span>
<a name="l00447"></a>00447 <span class="comment">* (Returned) Long name of the projection.</span>
<a name="l00448"></a>00448 <span class="comment">*</span>
<a name="l00449"></a>00449 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00450"></a>00450 <span class="comment">*</span>
<a name="l00451"></a>00451 <span class="comment">* int category</span>
<a name="l00452"></a>00452 <span class="comment">* (Returned) Projection category matching the value of the relevant global</span>
<a name="l00453"></a>00453 <span class="comment">* variable:</span>
<a name="l00454"></a>00454 <span class="comment">*</span>
<a name="l00455"></a>00455 <span class="comment">* - ZENITHAL,</span>
<a name="l00456"></a>00456 <span class="comment">* - CYLINDRICAL,</span>
<a name="l00457"></a>00457 <span class="comment">* - PSEUDOCYLINDRICAL,</span>
<a name="l00458"></a>00458 <span class="comment">* - CONVENTIONAL,</span>
<a name="l00459"></a>00459 <span class="comment">* - CONIC,</span>
<a name="l00460"></a>00460 <span class="comment">* - POLYCONIC,</span>
<a name="l00461"></a>00461 <span class="comment">* - QUADCUBE, and</span>
<a name="l00462"></a>00462 <span class="comment">* - HEALPIX.</span>
<a name="l00463"></a>00463 <span class="comment">*</span>
<a name="l00464"></a>00464 <span class="comment">* The category name may be identified via the prj_categories character</span>
<a name="l00465"></a>00465 <span class="comment">* array, e.g.</span>
<a name="l00466"></a>00466 <span class="comment">*</span>
<a name="l00467"></a>00467 <span class="comment">= struct prjprm prj;</span>
<a name="l00468"></a>00468 <span class="comment">= ...</span>
<a name="l00469"></a>00469 <span class="comment">= printf("%s\n", prj_categories[prj.category]);</span>
<a name="l00470"></a>00470 <span class="comment">*</span>
<a name="l00471"></a>00471 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00472"></a>00472 <span class="comment">*</span>
<a name="l00473"></a>00473 <span class="comment">* int pvrange</span>
<a name="l00474"></a>00474 <span class="comment">* (Returned) Range of projection parameter indices: 100 times the first</span>
<a name="l00475"></a>00475 <span class="comment">* allowed index plus the number of parameters, e.g. TAN is 0 (no</span>
<a name="l00476"></a>00476 <span class="comment">* parameters), SZP is 103 (1 to 3), and ZPN is 30 (0 to 29).</span>
<a name="l00477"></a>00477 <span class="comment">*</span>
<a name="l00478"></a>00478 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00479"></a>00479 <span class="comment">*</span>
<a name="l00480"></a>00480 <span class="comment">* int simplezen</span>
<a name="l00481"></a>00481 <span class="comment">* (Returned) True if the projection is a radially-symmetric zenithal</span>
<a name="l00482"></a>00482 <span class="comment">* projection.</span>
<a name="l00483"></a>00483 <span class="comment">*</span>
<a name="l00484"></a>00484 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00485"></a>00485 <span class="comment">*</span>
<a name="l00486"></a>00486 <span class="comment">* int equiareal</span>
<a name="l00487"></a>00487 <span class="comment">* (Returned) True if the projection is equal area.</span>
<a name="l00488"></a>00488 <span class="comment">*</span>
<a name="l00489"></a>00489 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00490"></a>00490 <span class="comment">*</span>
<a name="l00491"></a>00491 <span class="comment">* int conformal</span>
<a name="l00492"></a>00492 <span class="comment">* (Returned) True if the projection is conformal.</span>
<a name="l00493"></a>00493 <span class="comment">*</span>
<a name="l00494"></a>00494 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00495"></a>00495 <span class="comment">*</span>
<a name="l00496"></a>00496 <span class="comment">* int global</span>
<a name="l00497"></a>00497 <span class="comment">* (Returned) True if the projection can represent the whole sphere in a</span>
<a name="l00498"></a>00498 <span class="comment">* finite, non-overlapped mapping.</span>
<a name="l00499"></a>00499 <span class="comment">*</span>
<a name="l00500"></a>00500 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00501"></a>00501 <span class="comment">*</span>
<a name="l00502"></a>00502 <span class="comment">* int divergent</span>
<a name="l00503"></a>00503 <span class="comment">* (Returned) True if the projection diverges in latitude.</span>
<a name="l00504"></a>00504 <span class="comment">*</span>
<a name="l00505"></a>00505 <span class="comment">* Provided for information only, not used by the projection routines.</span>
<a name="l00506"></a>00506 <span class="comment">*</span>
<a name="l00507"></a>00507 <span class="comment">* double x0</span>
<a name="l00508"></a>00508 <span class="comment">* (Returned) The offset in x, and ...</span>
<a name="l00509"></a>00509 <span class="comment">* double y0</span>
<a name="l00510"></a>00510 <span class="comment">* (Returned) ... the offset in y used to force (x,y) = (0,0) at</span>
<a name="l00511"></a>00511 <span class="comment">* (phi_0,theta_0).</span>
<a name="l00512"></a>00512 <span class="comment">*</span>
<a name="l00513"></a>00513 <span class="comment">* struct wcserr *err</span>
<a name="l00514"></a>00514 <span class="comment">* (Returned) If enabled, when an error status is returned this struct</span>
<a name="l00515"></a>00515 <span class="comment">* contains detailed information about the error, see wcserr_enable().</span>
<a name="l00516"></a>00516 <span class="comment">*</span>
<a name="l00517"></a>00517 <span class="comment">* void *padding</span>
<a name="l00518"></a>00518 <span class="comment">* (An unused variable inserted for alignment purposes only.)</span>
<a name="l00519"></a>00519 <span class="comment">*</span>
<a name="l00520"></a>00520 <span class="comment">* double w[10]</span>
<a name="l00521"></a>00521 <span class="comment">* (Returned) Intermediate floating-point values derived from the</span>
<a name="l00522"></a>00522 <span class="comment">* projection parameters, cached here to save recomputation.</span>
<a name="l00523"></a>00523 <span class="comment">*</span>
<a name="l00524"></a>00524 <span class="comment">* Usage of the w[] array as it applies to each projection is described in</span>
<a name="l00525"></a>00525 <span class="comment">* the prologue to each trio of projection routines in prj.c.</span>
<a name="l00526"></a>00526 <span class="comment">*</span>
<a name="l00527"></a>00527 <span class="comment">* int n</span>
<a name="l00528"></a>00528 <span class="comment">* (Returned) Intermediate integer value (used only for the ZPN and HPX</span>
<a name="l00529"></a>00529 <span class="comment">* projections).</span>
<a name="l00530"></a>00530 <span class="comment">*</span>
<a name="l00531"></a>00531 <span class="comment">* int (*prjx2s)(PRJX2S_ARGS)</span>
<a name="l00532"></a>00532 <span class="comment">* (Returned) Pointer to the projection ...</span>
<a name="l00533"></a>00533 <span class="comment">* int (*prjs2x)(PRJ_ARGS)</span>
<a name="l00534"></a>00534 <span class="comment">* (Returned) ... and deprojection routines.</span>
<a name="l00535"></a>00535 <span class="comment">*</span>
<a name="l00536"></a>00536 <span class="comment">*</span>
<a name="l00537"></a>00537 <span class="comment">* Global variable: const char *prj_errmsg[] - Status return messages</span>
<a name="l00538"></a>00538 <span class="comment">* ------------------------------------------------------------------</span>
<a name="l00539"></a>00539 <span class="comment">* Error messages to match the status value returned from each function.</span>
<a name="l00540"></a>00540 <span class="comment">*</span>
<a name="l00541"></a>00541 <span class="comment">*===========================================================================*/</span>
<a name="l00542"></a>00542
<a name="l00543"></a>00543 <span class="preprocessor">#ifndef WCSLIB_PROJ</span>
<a name="l00544"></a>00544 <span class="preprocessor"></span><span class="preprocessor">#define WCSLIB_PROJ</span>
<a name="l00545"></a>00545 <span class="preprocessor"></span>
<a name="l00546"></a>00546 <span class="preprocessor">#include "<a class="code" href="wcserr_8h.html">wcserr.h</a>"</span>
<a name="l00547"></a>00547
<a name="l00548"></a>00548 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00549"></a>00549 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00550"></a>00550 <span class="preprocessor">#endif</span>
<a name="l00551"></a>00551 <span class="preprocessor"></span>
<a name="l00552"></a>00552
<a name="l00553"></a>00553 <span class="comment">/* Total number of projection parameters; 0 to PVN-1. */</span>
<a name="l00554"></a><a class="code" href="prj_8h.html#c8dfb42cf72db0c4bc690d030f75c662">00554</a> <span class="preprocessor">#define PVN 30</span>
<a name="l00555"></a>00555 <span class="preprocessor"></span>
<a name="l00556"></a>00556 <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="prj_8h.html#cb157519ef498bf669298c5508492f3e" title="Status return messages.">prj_errmsg</a>[];
<a name="l00557"></a>00557
<a name="l00558"></a><a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d0574305">00558</a> <span class="keyword">enum</span> <a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d0574305">prj_errmsg_enum</a> {
<a name="l00559"></a><a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d05743056f3a73d3c0a7dc7d15ceb00e00714bea">00559</a> <a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d05743056f3a73d3c0a7dc7d15ceb00e00714bea">PRJERR_SUCCESS</a> = 0, <span class="comment">/* Success. */</span>
<a name="l00560"></a><a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d057430560d6a804ddfa2f2d0f25f397d653695b">00560</a> <a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d057430560d6a804ddfa2f2d0f25f397d653695b">PRJERR_NULL_POINTER</a> = 1, <span class="comment">/* Null prjprm pointer passed. */</span>
<a name="l00561"></a><a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d05743056a0f63e2f52f594637a12db14e5814e6">00561</a> <a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d05743056a0f63e2f52f594637a12db14e5814e6">PRJERR_BAD_PARAM</a> = 2, <span class="comment">/* Invalid projection parameters. */</span>
<a name="l00562"></a><a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d0574305d33460ba0b865ff7580e6d2cebd92c74">00562</a> <a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d0574305d33460ba0b865ff7580e6d2cebd92c74">PRJERR_BAD_PIX</a> = 3, <span class="comment">/* One or more of the (x, y) coordinates were</span>
<a name="l00563"></a>00563 <span class="comment"> invalid. */</span>
<a name="l00564"></a><a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d05743050d15cd17822bea2f7fc0209a180cc998">00564</a> <a class="code" href="prj_8h.html#2ac22403e59a9e8d2b2f53f6d05743050d15cd17822bea2f7fc0209a180cc998">PRJERR_BAD_WORLD</a> = 4 <span class="comment">/* One or more of the (phi, theta) coordinates</span>
<a name="l00565"></a>00565 <span class="comment"> were invalid. */</span>
<a name="l00566"></a>00566 };
<a name="l00567"></a>00567
<a name="l00568"></a>00568 <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#dc97181f64d72234b8c6903b22b33df9" title="Identifier for conic projections.">CONIC</a>, <a class="code" href="prj_8h.html#c940da0fb0552876fb40a92f82c9625f" title="Identifier for conventional projections.">CONVENTIONAL</a>, <a class="code" href="prj_8h.html#86e25219d2169702c7db6508750097cf" title="Identifier for cylindrical projections.">CYLINDRICAL</a>, <a class="code" href="prj_8h.html#afd25a96ccc5966c04d7732ca482c0c1" title="Identifier for polyconic projections.">POLYCONIC</a>,
<a name="l00569"></a>00569 <a class="code" href="prj_8h.html#5a2f80bed69a84464e5654f91ed4fb63" title="Identifier for pseudocylindrical projections.">PSEUDOCYLINDRICAL</a>, <a class="code" href="prj_8h.html#749605599f1bf2b883c5c88b6cc9c06b" title="Identifier for quadcube projections.">QUADCUBE</a>, <a class="code" href="prj_8h.html#4b25d630b7590f31fa0aa6d5861c9bfd" title="Identifier for zenithal/azimuthal projections.">ZENITHAL</a>, <a class="code" href="prj_8h.html#6e2db45f219ba5732ddca43a9fc17408" title="Identifier for the HEALPix projection.">HEALPIX</a>;
<a name="l00570"></a>00570 <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> <a class="code" href="prj_8h.html#9bceed17f625eb88a0826871dc8296b5" title="Projection categories.">prj_categories</a>[9][32];
<a name="l00571"></a>00571
<a name="l00572"></a>00572 <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#2d30db5685dd1faa18680a0e69bc5854" title="The number of recognized three-letter projection codes.">prj_ncode</a>;
<a name="l00573"></a>00573 <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> <a class="code" href="prj_8h.html#4089618a84e11369bf9e5fd7c11c7368" title="Recognized three-letter projection codes.">prj_codes</a>[27][4];
<a name="l00574"></a>00574
<a name="l00575"></a>00575 <span class="preprocessor">#ifdef PRJX2S_ARGS</span>
<a name="l00576"></a>00576 <span class="preprocessor"></span><span class="preprocessor">#undef PRJX2S_ARGS</span>
<a name="l00577"></a>00577 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00578"></a>00578 <span class="preprocessor"></span>
<a name="l00579"></a>00579 <span class="preprocessor">#ifdef PRJS2X_ARGS</span>
<a name="l00580"></a>00580 <span class="preprocessor"></span><span class="preprocessor">#undef PRJS2X_ARGS</span>
<a name="l00581"></a>00581 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00582"></a>00582 <span class="preprocessor"></span>
<a name="l00583"></a>00583 <span class="comment">/* For use in declaring deprojection function prototypes. */</span>
<a name="l00584"></a><a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0">00584</a> <span class="preprocessor">#define PRJX2S_ARGS struct prjprm *prj, int nx, int ny, int sxy, int spt, \</span>
<a name="l00585"></a>00585 <span class="preprocessor">const double x[], const double y[], double phi[], double theta[], int stat[]</span>
<a name="l00586"></a>00586 <span class="preprocessor"></span>
<a name="l00587"></a>00587 <span class="comment">/* For use in declaring projection function prototypes. */</span>
<a name="l00588"></a><a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a">00588</a> <span class="preprocessor">#define PRJS2X_ARGS struct prjprm *prj, int nx, int ny, int sxy, int spt, \</span>
<a name="l00589"></a>00589 <span class="preprocessor">const double phi[], const double theta[], double x[], double y[], int stat[]</span>
<a name="l00590"></a>00590 <span class="preprocessor"></span>
<a name="l00591"></a>00591
<a name="l00592"></a><a class="code" href="structprjprm.html">00592</a> <span class="keyword">struct </span><a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> {
<a name="l00593"></a>00593 <span class="comment">/* Initialization flag (see the prologue above). */</span>
<a name="l00594"></a>00594 <span class="comment">/*------------------------------------------------------------------------*/</span>
<a name="l00595"></a><a class="code" href="structprjprm.html#d304d66b3f3aa64fe9c7251d3c420d02">00595</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#d304d66b3f3aa64fe9c7251d3c420d02">flag</a>; <span class="comment">/* Set to zero to force initialization. */</span>
<a name="l00596"></a>00596
<a name="l00597"></a>00597 <span class="comment">/* Parameters to be provided (see the prologue above). */</span>
<a name="l00598"></a>00598 <span class="comment">/*------------------------------------------------------------------------*/</span>
<a name="l00599"></a><a class="code" href="structprjprm.html#4f3c364f16d0b6498d7e11e6bb67239c">00599</a> <span class="keywordtype">char</span> <a class="code" href="structprjprm.html#4f3c364f16d0b6498d7e11e6bb67239c">code</a>[4]; <span class="comment">/* Three-letter projection code. */</span>
<a name="l00600"></a><a class="code" href="structprjprm.html#3894c2e551929b29adce50cd637fa351">00600</a> <span class="keywordtype">double</span> <a class="code" href="structprjprm.html#3894c2e551929b29adce50cd637fa351">r0</a>; <span class="comment">/* Radius of the generating sphere. */</span>
<a name="l00601"></a><a class="code" href="structprjprm.html#46d6928a9026e7b3376dcf0d3f91db64">00601</a> <span class="keywordtype">double</span> <a class="code" href="structprjprm.html#46d6928a9026e7b3376dcf0d3f91db64">pv</a>[<a class="code" href="prj_8h.html#c8dfb42cf72db0c4bc690d030f75c662" title="Total number of projection parameters.">PVN</a>]; <span class="comment">/* Projection parameters. */</span>
<a name="l00602"></a><a class="code" href="structprjprm.html#e91fa3ff034b1c6de3ec98d8fb9e0ab1">00602</a> <span class="keywordtype">double</span> <a class="code" href="structprjprm.html#699ad609ff7c1935d8fb6a457a5b8164">phi0</a>, <a class="code" href="structprjprm.html#e91fa3ff034b1c6de3ec98d8fb9e0ab1">theta0</a>; <span class="comment">/* Fiducial native coordinates. */</span>
<a name="l00603"></a><a class="code" href="structprjprm.html#b8dd3d8b1e462a2b261fc9e304885943">00603</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#b8dd3d8b1e462a2b261fc9e304885943">bounds</a>; <span class="comment">/* Enable strict bounds checking. */</span>
<a name="l00604"></a>00604
<a name="l00605"></a>00605 <span class="comment">/* Information derived from the parameters supplied. */</span>
<a name="l00606"></a>00606 <span class="comment">/*------------------------------------------------------------------------*/</span>
<a name="l00607"></a><a class="code" href="structprjprm.html#b165b11d417700de0a4187f133050a2b">00607</a> <span class="keywordtype">char</span> <a class="code" href="structprjprm.html#b165b11d417700de0a4187f133050a2b">name</a>[40]; <span class="comment">/* Projection name. */</span>
<a name="l00608"></a><a class="code" href="structprjprm.html#f0fcebbc8155f0b1ee868e64a2ed9ac3">00608</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#f0fcebbc8155f0b1ee868e64a2ed9ac3">category</a>; <span class="comment">/* Projection category. */</span>
<a name="l00609"></a><a class="code" href="structprjprm.html#bcd2a3ee9f61b930d23bf741cea63bf3">00609</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#bcd2a3ee9f61b930d23bf741cea63bf3">pvrange</a>; <span class="comment">/* Range of projection parameter indices. */</span>
<a name="l00610"></a><a class="code" href="structprjprm.html#fecdd175932cbf29fcfac575b1a5cb9b">00610</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#fecdd175932cbf29fcfac575b1a5cb9b">simplezen</a>; <span class="comment">/* Is it a simple zenithal projection? */</span>
<a name="l00611"></a><a class="code" href="structprjprm.html#b3e207e26d1c9db06cedba2cf4460340">00611</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#b3e207e26d1c9db06cedba2cf4460340">equiareal</a>; <span class="comment">/* Is it an equal area projection? */</span>
<a name="l00612"></a><a class="code" href="structprjprm.html#d7a41e3d03cb739c2a9aa1f8aabf54f9">00612</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#d7a41e3d03cb739c2a9aa1f8aabf54f9">conformal</a>; <span class="comment">/* Is it a conformal projection? */</span>
<a name="l00613"></a><a class="code" href="structprjprm.html#e634b0747fe55f77e65b6909c94227d9">00613</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#e634b0747fe55f77e65b6909c94227d9">global</a>; <span class="comment">/* Can it map the whole sphere? */</span>
<a name="l00614"></a><a class="code" href="structprjprm.html#62e88bd3c9e02f38193a800035b83918">00614</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#62e88bd3c9e02f38193a800035b83918">divergent</a>; <span class="comment">/* Does the projection diverge in latitude? */</span>
<a name="l00615"></a><a class="code" href="structprjprm.html#164706f09314c493c7e9d2c7325f8372">00615</a> <span class="keywordtype">double</span> <a class="code" href="structprjprm.html#ae2c61d85c72e87f4b2b77a14c8eb316">x0</a>, <a class="code" href="structprjprm.html#164706f09314c493c7e9d2c7325f8372">y0</a>; <span class="comment">/* Fiducial offsets. */</span>
<a name="l00616"></a>00616
<a name="l00617"></a>00617 <span class="comment">/* Error handling */</span>
<a name="l00618"></a>00618 <span class="comment">/*------------------------------------------------------------------------*/</span>
<a name="l00619"></a><a class="code" href="structprjprm.html#30e78bb110dc7a8ad0303370ce20762c">00619</a> <span class="keyword">struct </span><a class="code" href="structwcserr.html" title="Error message handling.">wcserr</a> *<a class="code" href="structprjprm.html#30e78bb110dc7a8ad0303370ce20762c">err</a>;
<a name="l00620"></a>00620
<a name="l00621"></a>00621 <span class="comment">/* Private */</span>
<a name="l00622"></a>00622 <span class="comment">/*------------------------------------------------------------------------*/</span>
<a name="l00623"></a><a class="code" href="structprjprm.html#36fa82794133f84373606b1f692ce8c4">00623</a> <span class="keywordtype">void</span> *<a class="code" href="structprjprm.html#36fa82794133f84373606b1f692ce8c4">padding</a>; <span class="comment">/* (Dummy inserted for alignment purposes.) */</span>
<a name="l00624"></a><a class="code" href="structprjprm.html#3b40a2df3b436c4ffcf5be6814993278">00624</a> <span class="keywordtype">double</span> <a class="code" href="structprjprm.html#3b40a2df3b436c4ffcf5be6814993278">w</a>[10]; <span class="comment">/* Intermediate values. */</span>
<a name="l00625"></a><a class="code" href="structprjprm.html#ab36c6218a33025ac4c5025de7c67d42">00625</a> <span class="keywordtype">int</span> <a class="code" href="structprjprm.html#fb805c40a4d37c195074c1305874d615">m</a>, <a class="code" href="structprjprm.html#ab36c6218a33025ac4c5025de7c67d42">n</a>; <span class="comment">/* Intermediate values. */</span>
<a name="l00626"></a>00626
<a name="l00627"></a>00627 int (*<a class="code" href="structprjprm.html#eef644ffeafea16e82b2b995a470a345">prjx2s</a>)(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>); <span class="comment">/* Pointers to the spherical projection and */</span>
<a name="l00628"></a>00628 int (*<a class="code" href="structprjprm.html#e699a5fb02198777343057972e1452d0">prjs2x</a>)(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>); <span class="comment">/* deprojection functions. */</span>
<a name="l00629"></a>00629 };
<a name="l00630"></a>00630
<a name="l00631"></a>00631 <span class="comment">/* Size of the prjprm struct in int units, used by the Fortran wrappers. */</span>
<a name="l00632"></a><a class="code" href="prj_8h.html#2cdabd9dfe78fe18b9e6597881d8ed92">00632</a> <span class="preprocessor">#define PRJLEN (sizeof(struct prjprm)/sizeof(int))</span>
<a name="l00633"></a>00633 <span class="preprocessor"></span>
<a name="l00634"></a>00634
<a name="l00635"></a>00635 <span class="comment">/* Use the preprocessor to help declare function prototypes (see above). */</span>
<a name="l00636"></a>00636 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#d994cb23871c51b20754973bef180f8a" title="Default constructor for the prjprm struct.">prjini</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00637"></a>00637 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#50db1538981df162709b81be0b2961ab" title="Destructor for the prjprm struct.">prjfree</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00638"></a>00638 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#8785bdf33bdaa3d9d52fd51b621ec8d5" title="Print routine for the prjprm struct.">prjprt</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00639"></a>00639
<a name="l00640"></a>00640 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#d43dbc765c63162d0af2b9285b8a434f" title="Generic setup routine for the prjprm struct.">prjset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00641"></a>00641 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#9a387f05414e7b59487fdcb03ff79ced" title="Generic Cartesian-to-spherical deprojection.">prjx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00642"></a>00642 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#be28216295d9e7ad7dbb01bf5985df9f" title="Generic spherical-to-Cartesian projection.">prjs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00643"></a>00643
<a name="l00644"></a>00644 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#bf6696d3455c684cb44d06da7885ce94" title="Set up a prjprm struct for the zenithal/azimuthal perspective (AZP) projection.">azpset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00645"></a>00645 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#8ebb4c79b635cef463b4e7242ff23c25" title="Cartesian-to-spherical transformation for the zenithal/azimuthal perspective (AZP)...">azpx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00646"></a>00646 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#bc26dfb2d0b0bee71f6e4541977d237f" title="Spherical-to-Cartesian transformation for the zenithal/azimuthal perspective (AZP)...">azps2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00647"></a>00647
<a name="l00648"></a>00648 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#faafab5c440384667d7af444b7aca750" title="Set up a prjprm struct for the slant zenithal perspective (SZP) projection.">szpset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00649"></a>00649 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#2fe67a5ecf17729881efa24c83482611" title="Cartesian-to-spherical transformation for the slant zenithal perspective (SZP) projection...">szpx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00650"></a>00650 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#70b750ec65eb4a277057200c7fbb251f" title="Spherical-to-Cartesian transformation for the slant zenithal perspective (SZP) projection...">szps2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00651"></a>00651
<a name="l00652"></a>00652 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#34d303d7ae44a6aca43c1a81bfaac10f" title="Set up a prjprm struct for the gnomonic (TAN) projection.">tanset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00653"></a>00653 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#cd4f54c072b6219242daeb6d4b9a74cb" title="Cartesian-to-spherical transformation for the gnomonic (TAN) projection.">tanx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00654"></a>00654 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#9d3358bed907342e3309e54bd2ab89da" title="Spherical-to-Cartesian transformation for the gnomonic (TAN) projection.">tans2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00655"></a>00655
<a name="l00656"></a>00656 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#66b51f10624b6c17a84b5b54058dd72b" title="Set up a prjprm struct for the stereographic (STG) projection.">stgset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00657"></a>00657 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#88c15d0b6f789cbbd7c5d323ef131360" title="Cartesian-to-spherical transformation for the stereographic (STG) projection.">stgx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00658"></a>00658 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#b46a0a668f28939626287d048153863f" title="Spherical-to-Cartesian transformation for the stereographic (STG) projection.">stgs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00659"></a>00659
<a name="l00660"></a>00660 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#b6ce2bb75a87b1679d05f251227d2f1b" title="Set up a prjprm struct for the orthographic/synthesis (SIN) projection.">sinset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00661"></a>00661 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#eb7881cd5d7b4b5e26281a512b8f62ac" title="Cartesian-to-spherical transformation for the orthographic/synthesis (SIN) projection...">sinx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00662"></a>00662 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#bdf8c6c3ef615a01ebf8822e013d6a63" title="Spherical-to-Cartesian transformation for the orthographic/synthesis (SIN) projection...">sins2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00663"></a>00663
<a name="l00664"></a>00664 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#c038f2474d5d58de157554cee74a9735" title="Set up a prjprm struct for the zenithal/azimuthal equidistant (ARC) projection.">arcset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00665"></a>00665 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#666322bfe8c4b8e73f00afeb47283f97" title="Cartesian-to-spherical transformation for the zenithal/azimuthal equidistant (ARC)...">arcx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00666"></a>00666 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#aba5ce89ae711728d8ba8105ac5fd599" title="Spherical-to-Cartesian transformation for the zenithal/azimuthal equidistant (ARC)...">arcs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00667"></a>00667
<a name="l00668"></a>00668 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#c983c5a393c5b3f1041f07b2eb95a3a5" title="Set up a prjprm struct for the zenithal/azimuthal polynomial (ZPN) projection.">zpnset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00669"></a>00669 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#574e44daea81568a6d5e324a6f339d6f" title="Cartesian-to-spherical transformation for the zenithal/azimuthal polynomial (ZPN)...">zpnx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00670"></a>00670 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#7b60d7992bf9c671cb4191f0ec2e0c90" title="Spherical-to-Cartesian transformation for the zenithal/azimuthal polynomial (ZPN)...">zpns2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00671"></a>00671
<a name="l00672"></a>00672 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#3229533df20718c0d5671cc9eb5316fe" title="Set up a prjprm struct for the zenithal/azimuthal equal area (ZEA) projection.">zeaset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00673"></a>00673 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#849a1bbd679d0c193e8be96a8b9ed534" title="Cartesian-to-spherical transformation for the zenithal/azimuthal equal area (ZEA)...">zeax2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00674"></a>00674 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#dc4da028cde2d970e9e5e22adca22f37" title="Spherical-to-Cartesian transformation for the zenithal/azimuthal equal area (ZEA)...">zeas2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00675"></a>00675
<a name="l00676"></a>00676 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#025adf8a63b5d4a8d2a4de804e0707be" title="Set up a prjprm struct for Airy&#39;s (AIR) projection.">airset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00677"></a>00677 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#2c87fbf68277f03051d3eaae3db785e9" title="Cartesian-to-spherical transformation for Airy&#39;s (AIR) projection.">airx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00678"></a>00678 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#75b6b1cb0a748e9b5d3a4cd31129ace6" title="Spherical-to-Cartesian transformation for Airy&#39;s (AIR) projection.">airs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00679"></a>00679
<a name="l00680"></a>00680 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#36cf447dee9f2e90e42d43d7adc5a0a1" title="Set up a prjprm struct for the cylindrical perspective (CYP) projection.">cypset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00681"></a>00681 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#ffdbf993ce959fce2c148c07cd0f2c0c" title="Cartesian-to-spherical transformation for the cylindrical perspective (CYP) projection...">cypx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00682"></a>00682 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#13e0f81e1fd4bdc46847ab4c634ad346" title="Spherical-to-Cartesian transformation for the cylindrical perspective (CYP) projection...">cyps2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00683"></a>00683
<a name="l00684"></a>00684 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#68ce41ad199c3385bed7e7d4ded2bd8a" title="Set up a prjprm struct for the cylindrical equal area (CEA) projection.">ceaset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00685"></a>00685 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#ff09e87b2246bdec83f6a7bb1bc0f471" title="Cartesian-to-spherical transformation for the cylindrical equal area (CEA) projection...">ceax2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00686"></a>00686 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#28ddb923a52cb597ca9c7dd03ceeb4fe" title="Spherical-to-Cartesian transformation for the cylindrical equal area (CEA) projection...">ceas2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00687"></a>00687
<a name="l00688"></a>00688 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#36ccae7b426311614a4e80432a2b62c3" title="Set up a prjprm struct for the plate carr&eacute;e (CAR) projection.">carset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00689"></a>00689 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#f363383621fb2b72243c1d6b894874d5" title="Cartesian-to-spherical transformation for the plate carr&eacute;e (CAR) projection...">carx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00690"></a>00690 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#b4325a957786611772b90e7a080327f3" title="Spherical-to-Cartesian transformation for the plate carr&eacute;e (CAR) projection...">cars2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00691"></a>00691
<a name="l00692"></a>00692 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#cf989261fd56f1e8b4eb8941ec2c754f" title="Set up a prjprm struct for Mercator&#39;s (MER) projection.">merset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00693"></a>00693 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#5380727f9aeff5aa57f8545d6b54a8f8" title="Cartesian-to-spherical transformation for Mercator&#39;s (MER) projection.">merx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00694"></a>00694 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#d9a80b98c04b0e06d08fd84bacc58b27" title="Spherical-to-Cartesian transformation for Mercator&#39;s (MER) projection.">mers2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00695"></a>00695
<a name="l00696"></a>00696 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#7c719c0387d23c53b0ceb3ee161de66a" title="Set up a prjprm struct for the Sanson-Flamsteed (SFL) projection.">sflset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00697"></a>00697 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#310444979f8f0e62db2bcbe39b0e3d35" title="Cartesian-to-spherical transformation for the Sanson-Flamsteed (SFL) projection.">sflx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00698"></a>00698 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#5517fccc15882e298ac9433f44d1ae4c" title="Spherical-to-Cartesian transformation for the Sanson-Flamsteed (SFL) projection.">sfls2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00699"></a>00699
<a name="l00700"></a>00700 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#d2a2b56c0900516dd24eebf430bcb29c" title="Set up a prjprm struct for the parabolic (PAR) projection.">parset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00701"></a>00701 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#17be11269d86b3308fd925949877718e" title="Cartesian-to-spherical transformation for the parabolic (PAR) projection.">parx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00702"></a>00702 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#eb5951ec54b929d16ab464939a37d74f" title="Spherical-to-Cartesian transformation for the parabolic (PAR) projection.">pars2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00703"></a>00703
<a name="l00704"></a>00704 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#151140d870ed4f490317938bd6260a6a" title="Set up a prjprm struct for Mollweide&#39;s (MOL) projection.">molset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00705"></a>00705 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#853c1df5e8327d83e9cfdde9455355f5" title="Cartesian-to-spherical transformation for Mollweide&#39;s (MOL) projection.">molx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00706"></a>00706 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#6f3cbaaf367984579aad5ec7eb00f397" title="Spherical-to-Cartesian transformation for Mollweide&#39;s (MOL) projection.">mols2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00707"></a>00707
<a name="l00708"></a>00708 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#33f92621800eb880b75611c439526d19" title="Set up a prjprm struct for the Hammer-Aitoff (AIT) projection.">aitset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00709"></a>00709 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#2da3bbd3c42c6ad324117cc5f249a834" title="Cartesian-to-spherical transformation for the Hammer-Aitoff (AIT) projection.">aitx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00710"></a>00710 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#8cca776751549082521a72a743d6b937" title="Spherical-to-Cartesian transformation for the Hammer-Aitoff (AIT) projection.">aits2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00711"></a>00711
<a name="l00712"></a>00712 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#c2f3bc42ac6e7d458364ebcf2b35814f" title="Set up a prjprm struct for the conic perspective (COP) projection.">copset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00713"></a>00713 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#588e9a86fc4dcd1195f867f718ce5429" title="Cartesian-to-spherical transformation for the conic perspective (COP) projection...">copx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00714"></a>00714 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#77283589634cc9a054f3a7c7fc91d38d" title="Spherical-to-Cartesian transformation for the conic perspective (COP) projection...">cops2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00715"></a>00715
<a name="l00716"></a>00716 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#b1264f0201113c1a8e931ad9a7630e2f" title="Set up a prjprm struct for the conic equal area (COE) projection.">coeset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00717"></a>00717 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#d70968320728202aa12048162248d368" title="Cartesian-to-spherical transformation for the conic equal area (COE) projection.">coex2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00718"></a>00718 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#fa8d27e481bbfffacd3e671e6715d5cb" title="Spherical-to-Cartesian transformation for the conic equal area (COE) projection.">coes2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00719"></a>00719
<a name="l00720"></a>00720 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#fbf5f05496f1e018425e02d60a4e0b74" title="Set up a prjprm struct for the conic equidistant (COD) projection.">codset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00721"></a>00721 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#105e2bf177120eb34f41e6af768f855d" title="Cartesian-to-spherical transformation for the conic equidistant (COD) projection...">codx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00722"></a>00722 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#fedc43dc512008174ec9b87753519031" title="Spherical-to-Cartesian transformation for the conic equidistant (COD) projection...">cods2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00723"></a>00723
<a name="l00724"></a>00724 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#344308a1d96a93f9bc682141f3df1a14" title="Set up a prjprm struct for the conic orthomorphic (COO) projection.">cooset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00725"></a>00725 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#2f42dcec4ea56bbb25b563859228b02e" title="Cartesian-to-spherical transformation for the conic orthomorphic (COO) projection...">coox2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00726"></a>00726 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#ed0317c8ffef248346da897568df266c" title="Spherical-to-Cartesian transformation for the conic orthomorphic (COO) projection...">coos2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00727"></a>00727
<a name="l00728"></a>00728 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#aec02a8e47d68e126983e9bb07a0c0aa" title="Set up a prjprm struct for Bonne&#39;s (BON) projection.">bonset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00729"></a>00729 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#53315ef8d3bd4002d1e98142fcf62566" title="Cartesian-to-spherical transformation for Bonne&#39;s (BON) projection.">bonx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00730"></a>00730 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#3b4cda48838c613460bff00c76fceb44" title="Spherical-to-Cartesian transformation for Bonne&#39;s (BON) projection.">bons2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00731"></a>00731
<a name="l00732"></a>00732 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#abdc7abc8b7c80187770cfd12c63f700" title="Set up a prjprm struct for the polyconic (PCO) projection.">pcoset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00733"></a>00733 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#28b623c88d38ab711fc61f36a97d0b27" title="Cartesian-to-spherical transformation for the polyconic (PCO) projection.">pcox2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00734"></a>00734 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#1f1714691f99f11640dccdc74eadfb49" title="Spherical-to-Cartesian transformation for the polyconic (PCO) projection.">pcos2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00735"></a>00735
<a name="l00736"></a>00736 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#ad75dcd0cd2fd0b6a162b5587cba9c2d" title="Set up a prjprm struct for the tangential spherical cube (TSC) projection.">tscset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00737"></a>00737 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#bbfbf3cba73850d7608765725993dfe3" title="Cartesian-to-spherical transformation for the tangential spherical cube (TSC) projection...">tscx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00738"></a>00738 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#167a49d730bca43483aef311f7114ae4" title="Spherical-to-Cartesian transformation for the tangential spherical cube (TSC) projection...">tscs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00739"></a>00739
<a name="l00740"></a>00740 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#8bc552f12260f944e0b8f9b714804983" title="Set up a prjprm struct for the COBE spherical cube (CSC) projection.">cscset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00741"></a>00741 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#fcefcb885b7d1c33e0458345cdc9f4a4" title="Cartesian-to-spherical transformation for the COBE spherical cube (CSC) projection...">cscx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00742"></a>00742 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#c9a7ed6b032cfdaba0e8caba17c6c149" title="Spherical-to-Cartesian transformation for the COBE spherical cube (CSC) projection...">cscs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00743"></a>00743
<a name="l00744"></a>00744 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#6d1f0504f9b864d4aed4a59d60bab819" title="Set up a prjprm struct for the quadrilateralized spherical cube (QSC) projection...">qscset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00745"></a>00745 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#fc5276e759c799deea36271d9cafc5e9" title="Cartesian-to-spherical transformation for the quadrilateralized spherical cube (QSC)...">qscx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00746"></a>00746 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#847b7c3f5b7361596912d3d876b4f4fe" title="Spherical-to-Cartesian transformation for the quadrilateralized spherical cube (QSC)...">qscs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00747"></a>00747
<a name="l00748"></a>00748 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#a2167e62576d36eae341c2583cb5d678" title="Set up a prjprm struct for the HEALPix (HPX) projection.">hpxset</a>(<span class="keyword">struct</span> <a class="code" href="structprjprm.html" title="Projection parameters.">prjprm</a> *prj);
<a name="l00749"></a>00749 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#4ff298fcdc6e7e23dfb4971fbd26ebe7" title="Cartesian-to-spherical transformation for the HEALPix (HPX) projection.">hpxx2s</a>(<a class="code" href="prj_8h.html#37ad31c5d2926862d211db0d14f401f0" title="For use in declaring deprojection function prototypes.">PRJX2S_ARGS</a>);
<a name="l00750"></a>00750 <span class="keywordtype">int</span> <a class="code" href="prj_8h.html#f44375ad9036898dd6d12d2cc58bf53b" title="Spherical-to-Cartesian transformation for the HEALPix (HPX) projection.">hpxs2x</a>(<a class="code" href="prj_8h.html#acc46318c778bd844e30d6997394cc8a" title="For use in declaring projection function prototypes.">PRJS2X_ARGS</a>);
<a name="l00751"></a>00751
<a name="l00752"></a>00752
<a name="l00753"></a>00753 <span class="comment">/* Deprecated. */</span>
<a name="l00754"></a><a class="code" href="prj_8h.html#7f080405538ea2ddd2882c991e25bd2f">00754</a> <span class="preprocessor">#define prjini_errmsg prj_errmsg</span>
<a name="l00755"></a><a class="code" href="prj_8h.html#f862254dceec64a987fdaabc40e4963d">00755</a> <span class="preprocessor"></span><span class="preprocessor">#define prjprt_errmsg prj_errmsg</span>
<a name="l00756"></a><a class="code" href="prj_8h.html#94f59295c312536ce66482b3d9bebec4">00756</a> <span class="preprocessor"></span><span class="preprocessor">#define prjset_errmsg prj_errmsg</span>
<a name="l00757"></a><a class="code" href="prj_8h.html#3672afec3db0f850d67404814ebdbc64">00757</a> <span class="preprocessor"></span><span class="preprocessor">#define prjx2s_errmsg prj_errmsg</span>
<a name="l00758"></a><a class="code" href="prj_8h.html#df9cca0265038851129d1966017cd525">00758</a> <span class="preprocessor"></span><span class="preprocessor">#define prjs2x_errmsg prj_errmsg</span>
<a name="l00759"></a>00759 <span class="preprocessor"></span>
<a name="l00760"></a>00760 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00761"></a>00761 <span class="preprocessor"></span>}
<a name="l00762"></a>00762 <span class="preprocessor">#endif</span>
<a name="l00763"></a>00763 <span class="preprocessor"></span>
<a name="l00764"></a>00764 <span class="preprocessor">#endif </span><span class="comment">/* WCSLIB_PROJ */</span>
</pre></div></div>
<hr size="1"><address style="text-align: right;"><small>Generated on Tue Oct 4 19:02:30 2011 for WCSLIB 4.8.2 by
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