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/* $Id: x08c.c,v 1.43 2004/06/14 21:51:54 rlaboiss Exp $
3-d plot demo.
Copyright (C) 2004 Alan W. Irwin
Copyright (C) 2004 Rafael Laboissiere
This file is part of PLplot.
PLplot is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PLplot 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with PLplot; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "plcdemos.h"
#define XPTS 35 /* Data points in x */
#define YPTS 46 /* Data points in y */
static PLFLT alt[] = {60.0, 20.0};
static PLFLT az[] = {30.0, 60.0};
static void cmap1_init(int);
static char *title[] =
{
"#frPLplot Example 8 - Alt=60, Az=30",
"#frPLplot Example 8 - Alt=20, Az=60",
};
/*--------------------------------------------------------------------------*\
* cmap1_init1
*
* Initializes color map 1 in HLS space.
* Basic grayscale variation from half-dark (which makes more interesting
* looking plot compared to dark) to light.
* An interesting variation on this:
* s[1] = 1.0
\*--------------------------------------------------------------------------*/
static void
cmap1_init(int gray)
{
PLFLT i[2], h[2], l[2], s[2];
i[0] = 0.0; /* left boundary */
i[1] = 1.0; /* right boundary */
if (gray) {
h[0] = 0.0; /* hue -- low: red (arbitrary if s=0) */
h[1] = 0.0; /* hue -- high: red (arbitrary if s=0) */
l[0] = 0.5; /* lightness -- low: half-dark */
l[1] = 1.0; /* lightness -- high: light */
s[0] = 0.0; /* minimum saturation */
s[1] = 0.0; /* minimum saturation */
} else {
h[0] = 240; /* blue -> green -> yellow -> */
h[1] = 0; /* -> red */
l[0] = 0.6;
l[1] = 0.6;
s[0] = 0.8;
s[1] = 0.8;
}
plscmap1n(256);
c_plscmap1l(0, 2, i, h, l, s, NULL);
}
/*--------------------------------------------------------------------------*\
* main
*
* Does a series of 3-d plots for a given data set, with different
* viewing options in each plot.
\*--------------------------------------------------------------------------*/
static int sombrero;
static PLOptionTable options[] = {
{
"sombrero", /* Turns on use of Sombrero function */
NULL,
NULL,
&sombrero,
PL_OPT_BOOL,
"-sombrero",
"Use the \"sombrero\" function." },
{
NULL, /* option */
NULL, /* handler */
NULL, /* client data */
NULL, /* address of variable to set */
0, /* mode flag */
NULL, /* short syntax */
NULL } /* long syntax */
};
#define LEVELS 10
int
main(int argc, char *argv[])
{
int i, j, k;
PLFLT *x, *y, **z;
PLFLT xx, yy, r;
PLINT ifshade;
PLFLT zmin, zmax, step;
PLFLT clevel[LEVELS];
PLINT nlevel=LEVELS;
int rosen=1;
/* Parse and process command line arguments */
plMergeOpts(options, "x08c options", NULL);
(void) plParseOpts(&argc, argv, PL_PARSE_FULL);
if (sombrero)
rosen=0;
/* Initialize plplot */
plinit();
/* Allocate data structures */
x = (PLFLT *) calloc(XPTS, sizeof(PLFLT));
y = (PLFLT *) calloc(YPTS, sizeof(PLFLT));
plAlloc2dGrid(&z, XPTS, YPTS);
for (i = 0; i < XPTS; i++) {
x[i] = ((double) (i - (XPTS / 2)) / (double) (XPTS / 2));
if (rosen)
x[i] *= 1.5;
}
for (i = 0; i < YPTS; i++) {
y[i] = (double) (i - (YPTS / 2)) / (double) (YPTS / 2);
if (rosen)
y[i] += 0.5;
}
for (i = 0; i < XPTS; i++) {
xx = x[i];
for (j = 0; j < YPTS; j++) {
yy = y[j];
if (rosen) {
z[i][j] = pow(1. - xx, 2.) + 100. * pow(yy - pow(xx, 2.), 2.);
/* The log argument may be zero for just the right grid. */
if (z[i][j] > 0.)
z[i][j] = log(z[i][j]);
else
z[i][j] = -5.; /* -MAXFLOAT would mess-up up the scale */
}
else {
r = sqrt(xx * xx + yy * yy);
z[i][j] = exp(-r * r) * cos(2.0 * PI * r);
}
}
}
plMinMax2dGrid(z, XPTS, YPTS, &zmax, &zmin);
step = (zmax-zmin)/(nlevel+1);
for (i=0; i<nlevel; i++)
clevel[i] = zmin + step + step*i;
pllightsource(1.,1.,1.);
for (k = 0; k < 2; k++) {
for (ifshade = 0; ifshade < 4; ifshade++) {
pladv(0);
plvpor(0.0, 1.0, 0.0, 0.9);
plwind(-1.0, 1.0, -0.9, 1.1);
plcol0(3);
plmtex("t", 1.0, 0.5, 0.5, title[k]);
plcol0(1);
if (rosen)
plw3d(1.0, 1.0, 1.0, -1.5, 1.5, -0.5, 1.5, zmin, zmax, alt[k], az[k]);
else
plw3d(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, zmin, zmax, 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 (ifshade == 0) { /* diffuse light surface plot */
cmap1_init(1);
plsurf3d(x, y, z, XPTS, YPTS, 0, NULL, 0);
} else if (ifshade == 1) { /* magnitude colored plot */
cmap1_init(0);
plsurf3d(x, y, z, XPTS, YPTS, MAG_COLOR, NULL, 0);
} else if (ifshade == 2) { /* magnitude colored plot with faceted squares */
plsurf3d(x, y, z, XPTS, YPTS, MAG_COLOR | FACETED, NULL, 0);
} else /* magnitude colored plot with contours */
plsurf3d(x, y, z, XPTS, YPTS, MAG_COLOR | SURF_CONT | BASE_CONT, clevel, nlevel);
}
}
/* Clean up */
free((void *) x);
free((void *) y);
plFree2dGrid(z, XPTS, YPTS);
plend();
exit(0);
}
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