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#include "otypes.h" |
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#include "otspecial.h" |
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extern CUBE thescene; /* our scene */ |
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extern int maxdepth; /* maximum recursion depth */ |
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extern double minweight; /* minimum ray weight */ |
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extern int do_irrad; /* compute irradiance? */ |
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long nrays = 0L; /* number of rays traced */ |
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static double Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
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OBJREC Lamb = { |
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OVOID, MAT_PLASTIC, "Lambertian", |
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{0, 5, NULL, Lambfa}, NULL, -1, |
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}; /* a Lambertian surface */ |
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#define MAXLOOP 128 /* modifier loop detection */ |
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#define RAYHIT (-1) /* return value for intercepted ray */ |
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{ |
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extern int (*trace)(); |
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if (localhit(r, &thescene) || sourcehit(r)) |
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if (localhit(r, &thescene)) |
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raycont(r); |
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else if (sourcehit(r)) |
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rayshade(r, r->ro->omod); |
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if (trace != NULL) |
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(*trace)(r); /* trace execution */ |
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{ |
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static int depth = 0; |
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register OBJREC *m; |
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/* check for irradiance calc. */ |
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if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS))) { |
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if (irr_ignore(objptr(mod)->otype)) |
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raytrans(r); |
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else |
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(*ofun[Lamb.otype].funp)(&Lamb, r); |
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return; |
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} |
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/* check for infinite loop */ |
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if (depth++ >= MAXLOOP) |
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objerror(r->ro, USER, "possible modifier loop"); |