Function:s2qlw
From S2PLOT
(Difference between revisions)
| Revision as of 02:25, 23 November 2007 S2plot admin (Talk | contribs) ← Previous diff |
Current revision S2plot admin (Talk | contribs) |
||
| Line 18: | Line 18: | ||
| ==Code Example== | ==Code Example== | ||
| <code><pre> | <code><pre> | ||
| - | #include <stdio.h> | + | include <stdio.h> |
| #include <stdlib.h> | #include <stdlib.h> | ||
| + | #include <time.h> | ||
| #include "s2plot.h" | #include "s2plot.h" | ||
| Line 27: | Line 28: | ||
| if (lkc != *kc) { /* Space bar pressed? */ | if (lkc != *kc) { /* Space bar pressed? */ | ||
| - | s2slw(drand48()*10+1); /* Choose random linewidth */ | + | //s2slw(drand48()*10+1); /* Choose random linewidth */ |
| + | s2slw((float)rand() / (float)RAND_MAX * 10. + 1.); | ||
| } | } | ||
| int qlw = s2qlw(); /* Query line width */ | int qlw = s2qlw(); /* Query line width */ | ||
| - | char string[32]; | + | char string[32]; |
| sprintf(string,"line width = %d",qlw); /* Write to string */ | sprintf(string,"line width = %d",qlw); /* Write to string */ | ||
| s2textxy(0,0,0,string); /* Display text */ | s2textxy(0,0,0,string); /* Display text */ | ||
| int N = 2; /* Number of points in line */ | int N = 2; /* Number of points in line */ | ||
| - | float x[2], y[2], z[2]; | + | float x[2], y[2], z[2]; |
| x[0] = -0.8; y[0] = -0.4; z[0] = 0.0; /* Coordinates of line */ | x[0] = -0.8; y[0] = -0.4; z[0] = 0.0; /* Coordinates of line */ | ||
| x[1] = +0.8; y[1] = -0.4; z[1] = 0.0; | x[1] = +0.8; y[1] = -0.4; z[1] = 0.0; | ||
| Line 48: | Line 50: | ||
| fprintf(stderr,"Press the <spacebar> to change line width"); | fprintf(stderr,"Press the <spacebar> to change line width"); | ||
| + | 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 57: | Line 60: | ||
| 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
s2qlw
Query the line width.
Prototype
int s2qlw(void);
Description
Query the line width.
See Also
| s2slw | Set the line width |
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? */
//s2slw(drand48()*10+1); /* Choose random linewidth */
s2slw((float)rand() / (float)RAND_MAX * 10. + 1.);
}
int qlw = s2qlw(); /* Query line width */
char string[32];
sprintf(string,"line width = %d",qlw); /* Write to string */
s2textxy(0,0,0,string); /* Display text */
int N = 2; /* Number of points in line */
float x[2], y[2], z[2];
x[0] = -0.8; y[0] = -0.4; z[0] = 0.0; /* Coordinates of line */
x[1] = +0.8; y[1] = -0.4; z[1] = 0.0;
s2line(N, x, y, z); /* Draw the line */
lkc = *kc; /* Update count */
}
int main(int argc, char *argv[])
{
fprintf(stderr,"Press the <spacebar> to change line width");
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;
}
Back to S2PLOT function list.
