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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