This is bg.c in view mode; [Download] [Up]
#include "ray.h" /*ARGSUSED*/ struct color bgcolor(r) struct ray r; {struct color c; if(r.l.y>0) c.r=c.g=c.b=0.2; else c.r=c.g=c.b=0.2-0.8*r.l.y; return c; }
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.