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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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|
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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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/* |
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* Rtrace support routines for holodeck rendering |
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*/ |
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|
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#include "rholo.h" |
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#include "random.h" |
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|
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|
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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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GCOORD gc[2]; |
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int ila[2], hsh; |
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double d, sl[4]; |
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register int i; |
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|
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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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ila[0] = p->hd; ila[1] = p->bi; |
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hsh = ilhash(ila,2) + p->nc; |
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for (i = 0; i < p->nr; i++) { |
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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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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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|
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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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|
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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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p->nc += p->nr; |
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} |
