Function:ss2qar
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| Line 1: | Line 1: | ||
| - | ==ss2qas== | + | ==ss2qar== |
| - | Query the autospin state. | + | Query the aspect ratio. |
| ==Prototype== | ==Prototype== | ||
| <code><pre> | <code><pre> | ||
| - | int ss2qas(void); | + | float ss2qar(void); |
| </pre></code> | </pre></code> | ||
| ==Description== | ==Description== | ||
| - | Query the autospin state. | + | Query the aspect ratio: returned value is ratio of width to height, ie. it is normally > 1. |
| == See Also == | == See Also == | ||
| <table> | <table> | ||
| - | <tr><td>[[Function:ss2sas | ss2sas]]</td><td>Start/Stop the camera rotation..</td><td> </td></tr> | ||
| </table> | </table> | ||
| Line 24: | Line 23: | ||
| void cb(double *t, int *kc) | void cb(double *t, int *kc) | ||
| { | { | ||
| - | static int lkc = 0; /* Count of key presses */ | + | float qar = ss2qar(); /* Query the aspect ratio */ |
| - | + | char string[32]; | |
| - | ss2sss(50.0); /* Fast spinning! */ | + | sprintf(string,"aspect ratio = %.2f",qar); /* Write to string */ |
| - | if (lkc != *kc) { /* Space bar pressed? */ | + | |
| - | if (drand48() > 0.5) ss2sas(1); /* Random auto spin state */ | + | |
| - | else ss2sas(0); | + | |
| - | } | + | |
| - | + | ||
| - | float qas = ss2qas(); /* Query autospin state */ | + | |
| - | char string[32]; | + | |
| - | + | ||
| - | if (qas == 0) | + | |
| - | sprintf(string,"Not spinning"); /* Write to string */ | + | |
| - | else | + | |
| - | sprintf(string,"Whee...."); /* Write to string */ | + | |
| - | + | ||
| s2textxy(0,0,0,string); /* Display text */ | s2textxy(0,0,0,string); /* Display text */ | ||
| - | |||
| - | lkc = *kc; /* Update count */ | ||
| } | } | ||
| - | |||
| int main(int argc, char *argv[]) | int main(int argc, char *argv[]) | ||
| { | { | ||
| + | fprintf(stderr,"Resize window to see change in aspect ratio"); | ||
| - | fprintf(stderr,"Press <spacebar> to randomly change autospin state \n"); | + | s2opend("/s2mono", argc, argv); /* Open in mono mode */ |
| - | s2opend("/s2mono",argc, argv); /* Open the display: mono */ | + | |
| 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 */ | |
| + | |||
| cs2scb(cb); /* Install dynamic callback */ | cs2scb(cb); /* Install dynamic callback */ | ||
| s2show(1); /* Open the s2plot window */ | s2show(1); /* Open the s2plot window */ | ||
| - | + | ||
| return 1; | return 1; | ||
| } | } | ||
Revision as of 02:50, 23 November 2007
ss2qar
Query the aspect ratio.
Prototype
float ss2qar(void);
Description
Query the aspect ratio: returned value is ratio of width to height, ie. it is normally > 1.
See Also
Code Example
#include <stdio.h>
#include <stdlib.h>
#include "s2plot.h"
void cb(double *t, int *kc)
{
float qar = ss2qar(); /* Query the aspect ratio */
char string[32];
sprintf(string,"aspect ratio = %.2f",qar); /* Write to string */
s2textxy(0,0,0,string); /* Display text */
}
int main(int argc, char *argv[])
{
fprintf(stderr,"Resize window to see change in aspect ratio");
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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