Function:s2qci
From S2PLOT
(Difference between revisions)
| Revision as of 02:24, 23 November 2007 S2plot admin (Talk | contribs) ← Previous diff |
Current revision S2plot admin (Talk | contribs) |
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| Line 20: | Line 20: | ||
| #include <stdio.h> | #include <stdio.h> | ||
| #include <stdlib.h> | #include <stdlib.h> | ||
| + | #include <time.h> | ||
| #include "s2plot.h" | #include "s2plot.h" | ||
| Line 31: | Line 32: | ||
| int qci = s2qci(); /* Query colour index */ | int qci = s2qci(); /* Query colour index */ | ||
| - | char string[32]; | + | char string[32]; |
| sprintf(string,"colour index = %d",qci); /* Write to string */ | sprintf(string,"colour index = %d",qci); /* Write to string */ | ||
| s2textxy(0,0,0,string); /* Display text */ | s2textxy(0,0,0,string); /* Display text */ | ||
| Line 42: | Line 43: | ||
| fprintf(stderr,"Press the <spacebar> to change colour"); | fprintf(stderr,"Press the <spacebar> to change colour"); | ||
| + | srand48((long)time(NULL)); /* Seed random numbers */ | ||
| s2opend("/s2mono", argc, argv); /* Open in mono mode */ | s2opend("/s2mono", argc, argv); /* Open in mono mode */ | ||
| s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */ | s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */ | ||
| s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */ | s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */ | ||
| - | + | ||
| cs2scb(cb); /* Install dynamic callback */ | cs2scb(cb); /* Install dynamic callback */ | ||
| s2show(1); /* Open the s2plot window */ | s2show(1); /* Open the s2plot window */ | ||
| Line 51: | Line 53: | ||
| return 1; | return 1; | ||
| } | } | ||
| + | |||
| </pre></code> | </pre></code> | ||
| [[S2PLOT:Function List | Back]] to S2PLOT function list. | [[S2PLOT:Function List | Back]] to S2PLOT function list. | ||
| __NOTOC__ | __NOTOC__ | ||
| __NOEDITSECTION__ | __NOEDITSECTION__ | ||
Current revision
s2qci
Query the colour index.
Prototype
int s2qci(void);
Description
Query the colour index.
See Also
| s2sci | Set the colour index |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"
void cb(double *t, int *kc)
{
static int lkc = 0; /* Count of key presses */
if (lkc != *kc) { /* Space bar pressed? */
s2sci(drand48()*15+1); /* Choose random colour */
}
int qci = s2qci(); /* Query colour index */
char string[32];
sprintf(string,"colour index = %d",qci); /* Write to string */
s2textxy(0,0,0,string); /* Display text */
lkc = *kc; /* Update count */
}
int main(int argc, char *argv[])
{
fprintf(stderr,"Press the <spacebar> to change colour");
srand48((long)time(NULL)); /* Seed random numbers */
s2opend("/s2mono", argc, argv); /* Open in mono mode */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
cs2scb(cb); /* Install dynamic callback */
s2show(1); /* Open the s2plot window */
return 1;
}
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