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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* mx_func.c - routine for mixture functions. |
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* |
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* 11/2/88 |
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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 mixture function is specified: |
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*/ |
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mx_func(m, r) /* compute mixture function */ |
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register OBJREC *m; |
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RAY *r; |
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int |
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mx_func( /* compute mixture function */ |
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OBJREC *m, |
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RAY *r |
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) |
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{ |
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OBJECT obj; |
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register int i; |
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int i; |
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double coef; |
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OBJECT mod[2]; |
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register MFUNC *mf; |
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MFUNC *mf; |
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if (m->oargs.nsargs < 4) |
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objerror(m, USER, "bad # arguments"); |
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setfunc(m, r); |
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errno = 0; |
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coef = 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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} |
