Function:ns2i
From S2PLOT
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ns2i
Illumination.
Prototype
void ns2i(float x, float y, float z, float red, float green, float blue);
Description
Place an OpenGL light at location (x,y,z) with RGB colour (red,green,blue).
See Also
| ns2vi | Illumination - vector input. |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
XYZ xyz = { 0.0, 0.0, 0.0 };
COLOUR col = { 1.0, 1.0, 1.0 }; /* White */
float radius = 0.2; /* Sphere radius */
float lx, ly, lz; /* Light position */
float lr, lg, lb; /* Light colour */
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 */
lx = 0.0; ly = 0.3; lz = 0.8; /* Light position */
lr = 0.0; lg = 0.0; lb = 1.0; /* A blue light */
ns2vsphere(xyz, radius, col); /* Draw a sphere */
ns2i(lx,ly,lz, lr,lg,lb); /* Put the light in */
s2show(1); /* Open the s2plot window */
return 1;
}
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