Function:ns2vnpoint
From S2PLOT
Revision as of 23:18, 10 December 2007; view current revision
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ns2vnpoint
Draw multiple points at the given positions with one colour - vector input.
Prototype
void ns2vnpoint(XYZ *P, COLOUR col, int n);
Description
Draw n points at positions P with RBG colour (col), using vector data structures.
See Also
| ns2point | Draw a point at the given position and colour. |
| ns2vpoint | Draw a point at the given position and 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[100]; /* Positions */
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[i].x = drand48()*2.0 - 1.0;
xyz[i].y = drand48()*2.0 - 1.0;
xyz[i].z = drand48()*2.0 - 1.0;
col.r = drand48();
col.g = drand48();
col.b = drand48();
}
ns2vnpoint(xyz, col, N); /* Draw the points */
s2show(1); /* Open the s2plot window */
return 1;
}
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