Function:ns2vdisk
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ns2vdisk
Draw an annulus with given centre, inner and out radii, and colour - vector input.
Prototype
void ns2vdisk(XYZ P, float nx, float ny, float nz, float r1, float r2, COLOUR col);
Description
Draw an annulus with given centre (P), inner and outer radii (r1, r2) and RGB colour (col), using vector data structures. The annulus is oriented with normal vector (nx,ny,nz).
See Also
| ns2disk | Draw an annulus with given centre, inner and out radii, and colour. |
| 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[])
{
XYZ xyz = { 0.0, 0.0, 0.0 }; /* Centre of annular disk */
XYZ normal; /* Normal */
float inner = 0.1; /* Inner radius */
float outer = 0.7; /* Outer radius */
COLOUR col = { 0.0, 1.0, 1.0 }; /* Colour of annular disk */
srand48((long)time(NULL)); /* Seed random numbers */
normal.x = drand48(); /* Random normal! */
normal.y = drand48();
normal.z = drand48();
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 */
ns2vdisk(xyz, normal, inner,outer, col); /* Draw disk */
s2show(1); /* Open the s2plot window */
return 1;
}
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