Function:s2icm
From S2PLOT
s2icm
Install various colour maps.
Prototype
int s2icm(char *mapname, int idx1, int idx2);
Description
Install various colour maps. Give map name as a string, and index range where you want the map installed. Available maps are:
 | rainbow |  | grey, gray |
 | terrain, topo |  | iron, heated, hot |
 | astro |  | alt, zebra |
 | mgreen |
and may be preceeded by the exact string "inverse " (note the space is significant) to reverse the map direction.
See Also
| struct_COLOUR | Data structure for (r,g,b) colour indices. |
| ss2lcm | Load a colourmap into memory. |
PGPLOT Equivalent
Code Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
int i; /* Loop variable */
int N = 100; /* Number of points */
float x[100], y[100], z[100]; /* Coordinates of points */
int symbol = 1; /* Point symbol */
int col1, col2; /* Colour index range */
srand48((long)time(NULL)); /* Seed random numbers */
for (i=0;i<N;i++) {
x[i] = drand48()*2.0 - 1.0;
y[i] = drand48()*2.0 - 1.0;
z[i] = drand48()*2.0 - 1.0;
}
s2opend("/?",argc, argv); /* Open the display */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
s2slw(5); /* Sets size of point */
s2qcir(&col1, &col2); /* Query the colour range */
col1 = col2;
col2 = col2 + N;
s2scir(col1, col2); /* Set the colour index range */
s2icm("mgreen", col1, col2); /* Install a colour map */
for (i=0;i<N;i++) {
s2sci(col1+i); /* Set the colour */
s2pt1(x[i],y[i],z[i],symbol); /* Draw a single point */
}
s2show(1); /* Open the s2plot window */
return 1;
}
Back to S2PLOT function list.
