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 "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 */

   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++) {
      x = drand48()*2.0 - 1.0;			/* Random position */
      y = drand48()*2.0 - 1.0;
      z = drand48()*2.0 - 1.0;
      r = drand48();				/* Randomish colour */
      g = 1.0; 
      b = 0.3; 
      ns2m(marker, size, xyz, rgb);		/* Draw the marker */
      marker = (marker+1)%4;
   }

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

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