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gregl |
3.1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */
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#ifndef lint
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static char SCCSid[] = "$SunId$ SGI";
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#endif
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/*
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* Rtrace support routines for holodeck rendering
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*/
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#include "rholo.h"
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#include "random.h"
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packrays(rod, p) /* pack ray origins and directions */
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register float *rod;
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register PACKET *p;
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{
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static FVECT ro, rd;
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gregl |
3.3 |
GCOORD gc[2];
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gregl |
3.4 |
int ila[2], hsh;
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double d, sl[4];
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gregl |
3.1 |
register int i;
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if (!hdbcoord(gc, hdlist[p->hd], p->bi))
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error(CONSISTENCY, "bad beam index in packrays");
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gregl |
3.4 |
ila[0] = p->hd; ila[1] = p->bi;
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hsh = ilhash(ila,2) + p->nc;
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gregl |
3.1 |
for (i = 0; i < p->nr; i++) {
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gregl |
3.4 |
multisamp(sl, 4, urand(hsh+i));
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p->ra[i].r[0][0] = sl[0] * 256.;
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p->ra[i].r[0][1] = sl[1] * 256.;
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p->ra[i].r[1][0] = sl[2] * 256.;
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p->ra[i].r[1][1] = sl[3] * 256.;
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gregl |
3.1 |
d = hdray(ro, rd, hdlist[p->hd], gc, p->ra[i].r);
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if (p->offset != NULL) {
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VSUM(ro, ro, rd, d); /* exterior only */
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p->offset[i] = d;
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}
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VCOPY(rod, ro);
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rod += 3;
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VCOPY(rod, rd);
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rod += 3;
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}
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}
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donerays(p, rvl) /* encode finished ray computations */
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register PACKET *p;
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register float *rvl;
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{
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double d;
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register int i;
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for (i = 0; i < p->nr; i++) {
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setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]);
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d = rvl[3];
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if (p->offset != NULL)
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d += p->offset[i];
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p->ra[i].d = hdcode(hdlist[p->hd], d);
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rvl += 4;
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}
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gregl |
3.4 |
p->nc += p->nr;
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gregl |
3.1 |
}
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