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/* Copyright (c) 1986 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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* m_clip.c - routine for clipped (cut) objects. |
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* |
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* 3/17/86 |
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*/ |
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#include "copyright.h" |
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#include "ray.h" |
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/* |
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*/ |
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int |
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m_clip(m, r) /* clip objects from ray */ |
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register OBJREC *m; |
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register RAY *r; |
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{ |
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OBJECT cset[MAXSET+1], *modset; |
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OBJECT obj, mod; |
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int entering; |
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register int i; |
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obj = objndx(m); |
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if ((modset = (OBJECT *)m->os) == NULL) { |
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register OBJECT mod; |
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if (m->oargs.nsargs < 1 || m->oargs.nsargs > MAXSET) |
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objerror(m, USER, "bad # arguments"); |
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modset = (OBJECT *)malloc((m->oargs.nsargs+1)*sizeof(OBJECT)); |
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for (i = 0; i < m->oargs.nsargs; i++) { |
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if (!strcmp(m->oargs.sarg[i], VOIDID)) |
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continue; |
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if ((mod = modifier(m->oargs.sarg[i])) == OVOID) { |
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if ((mod = lastmod(obj, m->oargs.sarg[i])) == OVOID) { |
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sprintf(errmsg, "unknown modifier \"%s\"", |
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m->oargs.sarg[i]); |
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objerror(m, WARNING, errmsg); |
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inside--; |
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if (inside > 0) { /* we just hit the object */ |
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flipsurface(r); |
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return(rayshade(r, modifier(m->oargs.sarg[0]))); |
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return(rayshade(r, lastmod(obj, m->oargs.sarg[0]))); |
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} |
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} |
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raytrans(r); /* else transfer ray */ |
