| 1 |
gregl |
3.1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */
|
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint
|
| 4 |
|
|
static char SCCSid[] = "$SunId$ SGI";
|
| 5 |
|
|
#endif
|
| 6 |
|
|
|
| 7 |
|
|
/*
|
| 8 |
|
|
* Rtrace support routines for holodeck rendering
|
| 9 |
|
|
*/
|
| 10 |
|
|
|
| 11 |
|
|
#include "rholo.h"
|
| 12 |
|
|
#include "random.h"
|
| 13 |
|
|
|
| 14 |
|
|
|
| 15 |
|
|
packrays(rod, p) /* pack ray origins and directions */
|
| 16 |
|
|
register float *rod;
|
| 17 |
|
|
register PACKET *p;
|
| 18 |
|
|
{
|
| 19 |
|
|
static FVECT ro, rd;
|
| 20 |
gregl |
3.3 |
GCOORD gc[2];
|
| 21 |
gregl |
3.1 |
double d;
|
| 22 |
gregl |
3.2 |
long r1, r2;
|
| 23 |
gregl |
3.1 |
register int i;
|
| 24 |
|
|
|
| 25 |
|
|
if (!hdbcoord(gc, hdlist[p->hd], p->bi))
|
| 26 |
|
|
error(CONSISTENCY, "bad beam index in packrays");
|
| 27 |
|
|
for (i = 0; i < p->nr; i++) {
|
| 28 |
gregl |
3.2 |
r1 = random(); r2 = random();
|
| 29 |
|
|
p->ra[i].r[0][0] = r1 ^ r2>>7;
|
| 30 |
|
|
p->ra[i].r[0][1] = r1<<2 ^ r2;
|
| 31 |
|
|
p->ra[i].r[1][0] = r1<<4 ^ r2>>15;
|
| 32 |
|
|
p->ra[i].r[1][1] = r1<<6 ^ r2>>23;
|
| 33 |
gregl |
3.1 |
d = hdray(ro, rd, hdlist[p->hd], gc, p->ra[i].r);
|
| 34 |
|
|
if (p->offset != NULL) {
|
| 35 |
|
|
VSUM(ro, ro, rd, d); /* exterior only */
|
| 36 |
|
|
p->offset[i] = d;
|
| 37 |
|
|
}
|
| 38 |
|
|
VCOPY(rod, ro);
|
| 39 |
|
|
rod += 3;
|
| 40 |
|
|
VCOPY(rod, rd);
|
| 41 |
|
|
rod += 3;
|
| 42 |
|
|
}
|
| 43 |
|
|
}
|
| 44 |
|
|
|
| 45 |
|
|
|
| 46 |
|
|
donerays(p, rvl) /* encode finished ray computations */
|
| 47 |
|
|
register PACKET *p;
|
| 48 |
|
|
register float *rvl;
|
| 49 |
|
|
{
|
| 50 |
|
|
double d;
|
| 51 |
|
|
register int i;
|
| 52 |
|
|
|
| 53 |
|
|
for (i = 0; i < p->nr; i++) {
|
| 54 |
|
|
setcolr(p->ra[i].v, rvl[0], rvl[1], rvl[2]);
|
| 55 |
|
|
d = rvl[3];
|
| 56 |
|
|
if (p->offset != NULL)
|
| 57 |
|
|
d += p->offset[i];
|
| 58 |
|
|
p->ra[i].d = hdcode(hdlist[p->hd], d);
|
| 59 |
|
|
rvl += 4;
|
| 60 |
|
|
}
|
| 61 |
|
|
}
|
