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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* p_func.c - routine for procedural patterns. |
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* |
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* 4/8/86 |
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*/ |
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#include "ray.h" |
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#include "copyright.h" |
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#include "ray.h" |
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#include "func.h" |
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#include "rtotypes.h" |
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/* |
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* A procedural pattern can either be a brightness or a |
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*/ |
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p_bfunc(m, r) /* compute brightness pattern */ |
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OBJREC *m; |
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RAY *r; |
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extern int |
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p_bfunc( /* compute brightness pattern */ |
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OBJREC *m, |
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RAY *r |
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) |
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{ |
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double bval; |
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register MFUNC *mf; |
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setfunc(m, r); |
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errno = 0; |
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bval = evalue(mf->ep[0]); |
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if (errno) { |
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if (errno == EDOM || errno == ERANGE) { |
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objerror(m, WARNING, "compute error"); |
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return(0); |
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} |
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} |
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p_cfunc(m, r) /* compute color pattern */ |
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OBJREC *m; |
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RAY *r; |
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extern int |
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p_cfunc( /* compute color pattern */ |
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OBJREC *m, |
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RAY *r |
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) |
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{ |
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COLOR cval; |
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register MFUNC *mf; |
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setcolor(cval, evalue(mf->ep[0]), |
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evalue(mf->ep[1]), |
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evalue(mf->ep[2])); |
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if (errno) { |
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if (errno == EDOM || errno == ERANGE) { |
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objerror(m, WARNING, "compute error"); |
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return(0); |
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} |