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/*===========================================================================
Copyright (C) 2001 European Southern Observatory (ESO)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 675 Massachusetss Ave, Cambridge,
MA 02139, USA.
Corresponding concerning ESO-MIDAS should be addressed as follows:
Internet e-mail: midas@eso.org
Postal address: European Southern Observatory
Data Management Division
Karl-Schwarzschild-Strasse 2
D 85748 Garching bei Muenchen
GERMANY
===========================================================================*/
/* Program : locatefibre.c */
/* Author : G. Mulas - ITAL_FLAMES Consortium */
/* Date : */
/* */
/* Purpose : locate each fibre? Missing */
/* */
/* */
/* Input: see interface */
/* */
/* Output: */
/* */
/* DRS Functions called: */
/* none */
/* */
/* Pseudocode: */
/* Missing */
/* */
/* Version : */
/* Last modification date: 2002/08/05 */
/* Who When Why Where */
/* AMo 02-08-05 Add header header */
/*-------------------------------------------------------------------------*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <flames_midas_def.h>
#include <flames_uves.h>
#include <flames_newmatrix.h>
#include <flames_shiftcommon.h>
#include <flames_shiftall.h>
flames_err locatefibre(allflats *allflatsin, allflats *allflatsout,
orderpos* ordpos, shiftstruct *shiftdata,
int32_t iorder, int32_t ifibre,
int32_t ix, double yshift)
{
double fibrecentre=0;
double yup=0;
double ydown=0;
double pyup=0;
double pydown=0;
int32_t iorderifibreindex=0;
int32_t iorderifibreixindex=0;
int32_t *lvecbuf1=0;
int32_t *lvecbuf2=0;
frame_mask *fmvecbuf1=0;
iorderifibreindex = (iorder*allflatsin->maxfibres)+ifibre;
iorderifibreixindex = (iorderifibreindex*allflatsin->subcols)+ix;
/* if not allocated allocate ! */
if(!(allflatsout->lowfibrebounds)) {
if(!(allflatsout->lowfibrebounds =
l3tensor(0, allflatsout->lastorder-allflatsout->firstorder,
0, allflatsout->maxfibres-1, 0, allflatsout->subcols-1))) {
SCTPUT("Allocation error");
return flames_midas_fail();
}
}
lvecbuf1 = allflatsout->lowfibrebounds[0][0]+iorderifibreixindex;
if(!(allflatsout->highfibrebounds)) {
if(!(allflatsout->highfibrebounds =
l3tensor(0, allflatsout->lastorder-allflatsout->firstorder,
0, allflatsout->maxfibres-1, 0, allflatsout->subcols-1))) {
SCTPUT("Allocation error");
return flames_midas_fail();
}
}
lvecbuf2 = allflatsout->highfibrebounds[0][0]+iorderifibreixindex;
fmvecbuf1 = allflatsout->goodfibres[0][0]+iorderifibreixindex;
/* find the y central position of this fibre at this x */
fibrecentre = (shiftdata[ix]).ordercentre+(ordpos->fibrepos)[ifibre]+yshift;
/* now determine the y limits of this fibre */
yup = fibrecentre+allflatsin->halfibrewidth;
ydown = fibrecentre-allflatsin->halfibrewidth;
/* translate to pixel coordinates, remembering that pixel numbering starts
at 0 and taking into account the pixel size */
pyup = (yup-allflatsin->substarty)/allflatsin->substepy-0.5;
pydown = (ydown-allflatsin->substarty)/allflatsin->substepy+0.5;
/* check boundaries and truncate to integer appropriately */
/* is the whole interval out of the boundaries? */
if ((pyup <= -1) || (pydown >= (double)(allflatsin->subrows))) {
/* the y loop must be skipped */
*lvecbuf1=1;
*lvecbuf2=0;
*fmvecbuf1=BADSLICE;
}
else {
/* is the upper limit above the upper boundary? */
if (pyup >= (double) (allflatsin->subrows-1)) {
pyup = (double) (allflatsin->subrows-1);
*lvecbuf2 = allflatsin->subrows-1;
}
/* truncate the upper limit to the smallest larger integer */
else {
*lvecbuf2 = (int32_t) ceil(pyup);
}
/* is the lower limit below the lower boundary? */
if (pydown <= 0) {
pydown = 0;
*lvecbuf1 = 0;
}
else {
*lvecbuf1 = (int32_t) floor(pydown);
}
double fibrefrac = (pyup-pydown+1)*((double)(allflatsin->substepy))/
(2*allflatsin->halfibrewidth);
if (fibrefrac < allflatsin->minfibrefrac) {
/* skip this fibre */
*lvecbuf1 = 1;
*lvecbuf2 = 0;
*fmvecbuf1=BADSLICE;
}
}
return(NOERR);
}
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