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/*
* (c) 1988 by George Kyriazis
*/
/*
* the background color.
* can be changed to have any kind of background texturing. (hint hint)
*/
#include "ray.h"
struct color bgcolor(r)
struct ray r;
{
struct color c;
/* if it is above the appropriate axis just give a grey value */
/* if below give a gradually whiter color */
switch( bgflag ) {
case NONE:
c.r = c.g = c.b = 0.2;
break;
case X:
if( r.dir.x > 0.0 )
c.r = c.g = c.b = 0.2;
else
c.r = c.g = c.b = 0.2 - 0.8 * r.dir.x;
break;
case Y:
if( r.dir.y > 0.0 )
c.r = c.g = c.b = 0.2;
else
c.r = c.g = c.b = 0.2 - 0.8 * r.dir.y;
break;
case Z:
if( r.dir.z > 0.0 )
c.r = c.g = c.b = 0.2;
else
c.r = c.g = c.b = 0.2 - 0.8 * r.dir.z;
break;
}
return c;
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.