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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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* Mist volumetric material. |
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#include "ray.h" |
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#include "source.h" |
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#include "rtotypes.h" |
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/* |
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* A mist volume is used to specify a region in the scene where a certain |
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#define RELAYDELIM '>' /* relay delimiter character */ |
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static int inslist(int *sl, int n); |
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static int srcmatch(SRCREC *sp, char *id); |
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static void add2slist(RAY *r, int *sl); |
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static int |
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inslist(sl, n) /* return index of source n if it's in list sl */ |
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register int *sl; |
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register int n; |
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inslist( /* return index of source n if it's in list sl */ |
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register int *sl, |
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register int n |
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) |
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{ |
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register int i; |
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static int |
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srcmatch(sp, id) /* check for an id match on a light source */ |
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register SRCREC *sp; |
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register char *id; |
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srcmatch( /* check for an id match on a light source */ |
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register SRCREC *sp, |
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register char *id |
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) |
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{ |
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register char *cp; |
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/* check for relay sources */ |
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static void |
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add2slist(r, sl) /* add source list to ray's */ |
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register RAY *r; |
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register int *sl; |
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add2slist( /* add source list to ray's */ |
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register RAY *r, |
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register int *sl |
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) |
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{ |
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static int slspare[MAXSLIST+1]; /* in case of emergence */ |
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register int i; |
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} |
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int |
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m_mist(m, r) /* process a ray entering or leaving some mist */ |
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OBJREC *m; |
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register RAY *r; |
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extern int |
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m_mist( /* process a ray entering or leaving some mist */ |
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OBJREC *m, |
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register RAY *r |
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) |
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{ |
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RAY p; |
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int *myslist = NULL; |
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} else { /* leaving ray */ |
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if (myslist != NULL) { /* delete from list */ |
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for (j = myslist[0]; j > 0; j--) |
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if (i = inslist(p.slights, myslist[j])) |
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if ( (i = inslist(p.slights, myslist[j])) ) |
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p.slights[i] = -1; |
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for (i = 0, j = 1; j <= p.slights[0]; j++) |
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if (p.slights[j] != -1) |
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return(1); |
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memerr: |
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error(SYSTEM, "out of memory in m_mist"); |
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return 0; /* pro forma return */ |
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} |