Function:ns2vm

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ns2vm

Draw a marker - vector input

Prototype

void ns2vm(int type, float size, XYZ P, COLOUR col);

Description

Draw a marker at position P, with size and RGB colour col, using vector data structures. Argument type should be one of:

  • 0 = tetrahedron (pyramid)
  • 1 = wireframe 3D cross
  • 2 = shaded box
  • 3 = octahedron (diamond)

See Also

ns2m Draw a marker
struct_COLOUR Data structure for (r,g,b) colour indices.
struct_XYZ Data structure for (x,y,z) coordinates.


Code Example

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"

int main(int argc, char *argv[])
{
   int i;
   int marker;                                  /* Type of marker to use */
   XYZ xyz;                                     /* Position */
   COLOUR col;                                  /* Colour */
   float size = 0.4;                            /* Size of marker */

   srand48((long)time(NULL));                   /* Seed random numbers */

   s2opend("/?",argc, argv);                    /* Open the display */
   s2swin(-1.,1., -1.,1., -1.,1.);              /* Set the window coordinates */
   s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0);  /* Draw coordinate box */

   marker = 0;
   for (i=0;i<4;i++) {
      xyz.x = drand48()*2.0 - 1.0;                      /* Random position */
      xyz.y = drand48()*2.0 - 1.0;
      xyz.z = drand48()*2.0 - 1.0;
      col.r = drand48();                                /* Randomish colour */
      col.g = 1.0;
      col.b = 0.3;
      ns2vm(marker, size, xyz, col);            /* Draw the marker */
      marker = (marker+1)%4;
   }

   s2show(1);                                   /* Open the s2plot window */

   return 1;
}

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Retrieved from "https://astronomy.swin.edu.au/s2plot/index.php?title=Function:ns2vm"
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