Function:ss2qcs

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ss2qcs

Set/query the camera speed.

Prototype

float ss2qcs(void);

Description

Set/query the camera speed (ie. increment amount for camera movements. Values between 0.01 and 20.0 are reasonably sensible.

See Also

ss2scs Set the camera speed.
ss2qca Query the camera aperture.
ss2sca Set the camera aperture.
ss2sc Set the camera position, up vector and view direction.
ss2qc Query the camera position, up vector and view direction.

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 */

   float qcs = ss2qcs();                        /* Query camera increment */
   char string[32];

   sprintf(string,"%.2f",qcs);
   s2textxy(0,0,0,string);                      /* Display text */

   lkc = *kc;                                   /* Update count */
}


int main(int argc, char *argv[])
{

   srand48((long)time(NULL));                   /* Seed random numbers */
   s2opend("/s2mono",argc, argv);               /* Open the display: mono */
   s2swin(-1.,1., -1.,1., -1.,1.);              /* Set the window coordinates */
   s2box("BCDE",0,0,"BCDE",0,0,"BCDE",0,0);     /* Draw coordinate box */

   s2lab("","","","Press < and > to change camera movement increment, then +/- to test zooming\n");

   cs2scb(cb);                                  /* Install dynamic callback */
   s2show(1);                                   /* Open the s2plot window */

   return 1;
}

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Retrieved from "https://astronomy.swin.edu.au/s2plot/index.php?title=Function:ss2qcs"
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