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#ifndef lint |
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< |
static const char RCSid[] = "$Id$"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* normal.c - shading function for normal materials. |
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#define MAXITER 10 /* maximum # specular ray attempts */ |
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#endif |
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/* estimate of Fresnel function */ |
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< |
#define FRESNE(ci) (exp(-6.0*(ci)) - 0.00247875217) |
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#define FRESNE(ci) (exp(-5.85*(ci)) - 0.00287989916) |
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static void gaussamp(); |
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nd.alpha2 = m->oargs.farg[4]; |
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if ((nd.alpha2 *= nd.alpha2) <= FTINY) |
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nd.specfl |= SP_PURE; |
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– |
if (r->ro != NULL && isflat(r->ro->otype)) |
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– |
nd.specfl |= SP_FLAT; |
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if (hastexture = DOT(r->pert,r->pert) > FTINY*FTINY) |
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if (hastexture = (DOT(r->pert,r->pert) > FTINY*FTINY)) { |
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nd.pdot = raynormal(nd.pnorm, r); /* perturb normal */ |
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else { |
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} else { |
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VCOPY(nd.pnorm, r->ron); |
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nd.pdot = r->rod; |
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} |
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+ |
if (r->ro != NULL && isflat(r->ro->otype)) |
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nd.specfl |= SP_FLAT; |
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if (nd.pdot < .001) |
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nd.pdot = .001; /* non-zero for dirnorm() */ |
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multcolor(nd.mcolor, r->pcol); /* modify material color */ |
