Function:ns2vpoint

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ns2vpoint

Draw a point at the given position and colour - vector input.

Prototype

void ns2vpoint(XYZ P, COLOUR col);

Description

Draw a point at position P with RBG colour (col), using vector data structures.

See Also

ns2point Draw a point at the given position and colour.
ns2vnpoint Draw multiple points at the given positions with one colour - vector input.
ns2thpoint Draw a thick point at given position, in colour and thickness in pixels (not world coords).
ns2vthpoint Draw a thick point at given position, in colour and thickness in pixels (not world coords) - vector input.
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 N = 100;					/* Number of points */
   XYZ xyz;					/* Position */
   COLOUR col;					/* Colour */
   int i;

   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 */

   s2slw(3);	/* Note this does NOT change linewidth - use ns2thpoint */
   for (i=0;i<N;i++) {				/* Random data positions */
      xyz.x = drand48()*2.0 - 1.0;
      xyz.y = drand48()*2.0 - 1.0;
      xyz.z = drand48()*2.0 - 1.0;
      col.r = drand48();
      col.g = drand48();
      col.b = drand48();
      ns2vpoint(xyz, col);			/* Draw the point */
   }
   

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

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Retrieved from "https://astronomy.swin.edu.au/s2plot/index.php?title=Function:ns2vpoint"
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