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C $Id: x18f.fm4,v 1.6 2004/01/23 06:06:19 airwin Exp $
C
C Copyright (C) 2004 Alan W. Irwin
C
C This file is part of PLplot.
C
C PLplot is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Library Public License as
C published by the Free Software Foundation; either version 2 of the
C License, or (at your option) any later version.
C
C PLplot is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU Library General Public License for more details.
C
C You should have received a copy of the GNU Library General Public
C License along with PLplot; if not, write to the Free Software
C Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
C--------------------------------------------------------------------------
C main
C
C Does a series of 3-d plots for a given data set, with different
C viewing options in each plot.
C--------------------------------------------------------------------------
program x18f
implicit none
real*8 pi
parameter ( pi = 3.1415926535897932384d0 )
integer NPTS
parameter ( NPTS = 1000 )
integer i, j, k
real*8 x(NPTS), y(NPTS), z(NPTS)
real*8 r
character*80 title
integer opt(4)
real*8 alt(4)
real*8 az(4)
data opt / 1, 0, 1, 0 /
data alt / 20.0d0, 35.0d0, 50.0d0, 65.0d0 /
data az / 30.0d0, 40.0d0, 50.0d0, 60.0d0 /
integer PL_PARSE_FULL
parameter(PL_PARSE_FULL = 1)
C Process command-line arguments
call plparseopts(PL_PARSE_FULL)
C Initialize plplot
call plinit()
do k = 1, 4
call test_poly(k, alt(k), az(k))
enddo
C From the mind of a sick and twisted physicist...
do i = 1,NPTS
z(i) = -1.d0 + 2.d0 * dble (i-1) / dble (NPTS)
C Pick one ...
C r = 1. - dble (i-1) / dble (NPTS)
r = z(i)
x(i) = r * cos( 2.d0 * PI * 6.d0 * dble (i-1) / dble (NPTS) )
y(i) = r * sin( 2.d0 * PI * 6.d0 * dble (i-1) / dble (NPTS) )
enddo
do k = 1, 4
call pladv(0)
call plvpor(0.0d0, 1.0d0, 0.0d0, 0.9d0)
call plwind(-1.0d0, 1.0d0, -0.9d0, 1.1d0)
call plcol0(1)
call plw3d(1.0d0, 1.0d0, 1.0d0,
& -1.0d0, 1.0d0, -1.0d0, 1.0d0, -1.0d0, 1.0d0,
& alt(k), az(k))
call plbox3('bnstu', 'x axis', 0.0d0, 0,
& 'bnstu', 'y axis', 0.0d0, 0,
& 'bcdmnstuv', 'z axis', 0.0d0, 0)
call plcol0(2)
if ( opt(k).gt. 0 ) then
call plline3( NPTS, x, y, z )
else
call plpoin3( NPTS, x, y, z, 1 )
endif
call plcol0(3)
write( title, '(a,i2,a,i2)')
& '#frPLplot Example 18 - Alt=', nint(alt(k)),
& ', Az=', nint(az(k))
call plmtex('t', 1.0d0, 0.5d0, 0.5d0,
& title)
enddo
call plend()
end
subroutine test_poly(k, alt, az)
implicit none
integer k
real*8 alt, az
real*8 x(5), y(5), z(5)
integer i, j
real*8 pi, two_pi
parameter ( pi = 3.1415926535897932384d0 )
parameter ( two_pi = 2.0d0*pi )
integer draw(4,4)
DATA draw /
& 1, 1, 1, 1,
& 1, 0, 1, 0,
& 0, 1, 0, 1,
& 1, 1, 0, 0 /
real*8 theta, phi
integer ia
THETA(ia) = (two_pi * (ia) /20.d0)
PHI(ia) = (pi * (ia) / 20.1d0)
call pladv(0)
call plvpor(0.0d0, 1.0d0, 0.0d0, 0.9d0)
call plwind(-1.0d0, 1.0d0, -0.9d0, 1.1d0)
call plcol0(1)
call plw3d(1.0d0, 1.0d0, 1.0d0,
& -1.0d0, 1.0d0, -1.0d0, 1.0d0, -1.0d0, 1.0d0,
& alt, az)
call plbox3('bnstu', 'x axis', 0.0d0, 0,
& 'bnstu', 'y axis', 0.0d0, 0,
& 'bcdmnstuv', 'z axis', 0.0d0, 0)
call plcol0(2)
C x = r sin(phi) cos(theta)
C y = r sin(phi) sin(theta)
C z = r cos(phi)
C r = 1 :=)
do i=0,19
do j=0,19
x(1) = sin( PHI(j) ) * cos( THETA(i) )
y(1) = sin( PHI(j) ) * sin( THETA(i) )
z(1) = cos( PHI(j) )
x(2) = sin( PHI(j+1) ) * cos( THETA(i) )
y(2) = sin( PHI(j+1) ) * sin( THETA(i) )
z(2) = cos( PHI(j+1) )
x(3) = sin( PHI(j+1) ) * cos( THETA(i+1) )
y(3) = sin( PHI(j+1) ) * sin( THETA(i+1) )
z(3) = cos( PHI(j+1) )
x(4) = sin( PHI(j) ) * cos( THETA(i+1) )
y(4) = sin( PHI(j) ) * sin( THETA(i+1) )
z(4) = cos( PHI(j) )
x(5) = sin( PHI(j) ) * cos( THETA(i) )
y(5) = sin( PHI(j) ) * sin( THETA(i) )
z(5) = cos( PHI(j) )
call plpoly3( 5, x, y, z, draw(1,k), 1 )
enddo
enddo
call plcol0(3)
call plmtex('t', 1.0d0, 0.5d0, 0.5d0,
& 'unit radius sphere' )
return
end
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