Function:ss2scs

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==ss2scs== ==ss2scs==
 +Set the camera speed.
==Prototype== ==Prototype==
<code><pre> <code><pre>
 +void ss2scs(float spd);
</pre></code> </pre></code>
==Description== ==Description==
 +Set the camera speed (ie. increment amount for camera movements. Values between 0.01 and 20.0 are reasonably sensible.
==See Also== ==See Also==
 +<table>
 +<tr><td>[[Function:ss2qcs | ss2qcs ]]</td><td>Query the camera speed. </td></tr>
 +<tr><td>[[Function:ss2qca | ss2qca ]]</td><td>Query the camera aperture. </td></tr>
 +<tr><td>[[Function:ss2sca | ss2sca ]]</td><td>Set the camera aperture. </td></tr>
 +<tr><td>[[Function:ss2sc | ss2sc ]]</td><td>Set the camera position, up vector and view direction. </td></tr>
 +<tr><td>[[Function:ss2qc | ss2qc ]]</td><td>Query the camera position, up vector and view direction. </td></tr>
 +</table>
==Code Example== ==Code Example==
<code><pre> <code><pre>
-</pre></code>+#include <stdio.h>
 +#include <stdlib.h>
 +#include <time.h>
 +#include "s2plot.h"
-[[S2PLOT:Function List | Back]] to S2PLOT function list.+void cb(double *t, int *kc)
 +{
 + static int lkc = 0; /* Count of key presses */
 + static float spd = 1.0; /* Set the camera increment */
 + if (lkc != *kc) { /* Query whether <space> was pressed */
 + spd += 2.0; /* Update the camera increment */
 + }
 + ss2scs(spd); /* Set the new camera increment */
 + char string[32]; /* Write current increment to screen */
 + sprintf(string,"%.2f",spd);
 + s2textxy(0,0,0,string); /* Display text */
-__NOTOC__+ lkc = *kc; /* Update key press count */
-__NOEDITSECTION__+}
-Back to [[Function:Template | template]] page.+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 <space> to change camera movement increment, then +/- to test zooming\n");
 + 
 + cs2scb(cb); /* Install dynamic callback */
 + s2show(1); /* Open the s2plot window */
 + 
 + return 1;
 +}
 +</pre></code>
 + 
 +[[S2PLOT:Function List | Back]] to S2PLOT function list.
 + 
 +__NOTOC__
 +__NOEDITSECTION__

Current revision

ss2scs

Set the camera speed.

Prototype

void ss2scs(float spd);

Description

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

See Also

ss2qcs Query 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 */
   static float spd = 1.0;              /* Set the camera increment */

   if (lkc != *kc) {                    /* Query whether <space> was pressed */
      spd += 2.0;                       /* Update the camera increment */
   }
   ss2scs(spd);                         /* Set the new camera increment */

   char string[32];                     /* Write current increment to screen */
   sprintf(string,"%.2f",spd);
   s2textxy(0,0,0,string);              /* Display text */

   lkc = *kc;                           /* Update key press 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 <space> 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:ss2scs"
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