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/* $Id: x18c.c,v 1.21 2004/01/20 02:25:58 airwin Exp $
3-d line and point plot demo. Adapted from x08c.c.
*/
#include "plcdemos.h"
static int opt[] = { 1, 0, 1, 0 };
static PLFLT alt[] = {20.0, 35.0, 50.0, 65.0};
static PLFLT az[] = {30.0, 40.0, 50.0, 60.0};
void test_poly(int k);
/*--------------------------------------------------------------------------*\
* main
*
* Does a series of 3-d plots for a given data set, with different
* viewing options in each plot.
\*--------------------------------------------------------------------------*/
#define NPTS 1000
int
main(int argc, char *argv[])
{
int i, j, k;
PLFLT *x, *y, *z;
PLFLT r;
char title[80];
/* Parse and process command line arguments */
(void) plParseOpts(&argc, argv, PL_PARSE_FULL);
/* Initialize plplot */
plinit();
for( k=0; k < 4; k++ )
test_poly(k);
x = (PLFLT *) malloc(NPTS * sizeof(PLFLT));
y = (PLFLT *) malloc(NPTS * sizeof(PLFLT));
z = (PLFLT *) malloc(NPTS * sizeof(PLFLT));
/* From the mind of a sick and twisted physicist... */
for (i = 0; i < NPTS; i++) {
z[i] = -1. + 2. * i / NPTS;
/* Pick one ... */
/* r = 1. - ( (PLFLT) i / (PLFLT) NPTS ); */
r = z[i];
x[i] = r * cos( 2. * PI * 6. * i / NPTS );
y[i] = r * sin( 2. * PI * 6. * i / NPTS );
}
for (k = 0; k < 4; k++) {
pladv(0);
plvpor(0.0, 1.0, 0.0, 0.9);
plwind(-1.0, 1.0, -0.9, 1.1);
plcol0(1);
plw3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, alt[k], az[k]);
plbox3("bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0);
plcol0(2);
if (opt[k])
plline3( NPTS, x, y, z );
else
plpoin3( NPTS, x, y, z, 1 );
plcol0(3);
sprintf(title, "#frPLplot Example 18 - Alt=%.0f, Az=%.0f",
alt[k], az[k]);
plmtex("t", 1.0, 0.5, 0.5, title);
}
/* Clean up */
free((void *) x);
free((void *) y);
free((void *) z);
plend();
exit(0);
}
void test_poly(int k)
{
PLFLT *x, *y, *z;
int i, j;
PLFLT pi, two_pi;
PLINT draw[][4] = { { 1, 1, 1, 1 },
{ 1, 0, 1, 0 },
{ 0, 1, 0, 1 },
{ 1, 1, 0, 0 } };
pi = PI, two_pi = 2. * pi;
x = (PLFLT *) malloc(5 * sizeof(PLFLT));
y = (PLFLT *) malloc(5 * sizeof(PLFLT));
z = (PLFLT *) malloc(5 * sizeof(PLFLT));
pladv(0);
plvpor(0.0, 1.0, 0.0, 0.9);
plwind(-1.0, 1.0, -0.9, 1.1);
plcol0(1);
plw3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, alt[k], az[k]);
plbox3("bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0);
plcol0(2);
#define THETA(a) (two_pi * (a) /20.)
#define PHI(a) (pi * (a) / 20.1)
/*
x = r sin(phi) cos(theta)
y = r sin(phi) sin(theta)
z = r cos(phi)
r = 1 :=)
*/
for( i=0; i < 20; i++ ) {
for( j=0; j < 20; j++ ) {
x[0] = sin( PHI(j) ) * cos( THETA(i) );
y[0] = sin( PHI(j) ) * sin( THETA(i) );
z[0] = cos( PHI(j) );
x[1] = sin( PHI(j+1) ) * cos( THETA(i) );
y[1] = sin( PHI(j+1) ) * sin( THETA(i) );
z[1] = cos( PHI(j+1) );
x[2] = sin( PHI(j+1) ) * cos( THETA(i+1) );
y[2] = sin( PHI(j+1) ) * sin( THETA(i+1) );
z[2] = cos( PHI(j+1) );
x[3] = sin( PHI(j) ) * cos( THETA(i+1) );
y[3] = sin( PHI(j) ) * sin( THETA(i+1) );
z[3] = cos( PHI(j) );
x[4] = sin( PHI(j) ) * cos( THETA(i) );
y[4] = sin( PHI(j) ) * sin( THETA(i) );
z[4] = cos( PHI(j) );
plpoly3( 5, x, y, z, draw[k], 1 );
}
}
plcol0(3);
plmtex("t", 1.0, 0.5, 0.5, "unit radius sphere" );
/* Clean up */
free((void *) x);
free((void *) y);
free((void *) z);
}
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