23 |
|
hdcompgrid(hp) /* compute derived grid vector and index */ |
24 |
|
register HOLO *hp; |
25 |
|
{ |
26 |
– |
FVECT AxB; |
26 |
|
double d; |
28 |
– |
register FLOAT *v; |
27 |
|
register int i, j; |
28 |
|
/* initialize depth map */ |
29 |
|
if (hd_depthmap[0] < 1.) { |
36 |
|
} |
37 |
|
/* compute grid coordinate vectors */ |
38 |
|
for (i = 0; i < 3; i++) { |
39 |
< |
fcross(AxB, hp->xv[(i+1)%3], v=hp->xv[(i+2)%3]); |
42 |
< |
VCOPY(hp->wn[i], AxB); |
39 |
> |
fcross(hp->wn[i], hp->xv[(i+1)%3], hp->xv[(i+2)%3]); |
40 |
|
if (normalize(hp->wn[i]) == 0.) |
41 |
|
error(USER, "degenerate holodeck section"); |
42 |
|
hp->wo[i<<1] = DOT(hp->wn[i],hp->orig); |
43 |
< |
hp->wo[i<<1|1] = hp->wo[i<<1] + DOT(hp->wn[i],hp->xv[i]); |
44 |
< |
fcross(hp->gv[i][0], v, AxB); |
45 |
< |
d = DOT(v,v) / DOT(hp->gv[i][0],hp->gv[i][0]) * |
49 |
< |
hp->grid[(i+1)%3]; |
50 |
< |
for (j = 0; j < 3; j++) |
51 |
< |
hp->gv[i][0][j] *= d; |
52 |
< |
fcross(hp->gv[i][1], AxB, v=hp->xv[(i+1)%3]); |
53 |
< |
d = DOT(v,v) / DOT(hp->gv[i][1],hp->gv[i][1]) * |
54 |
< |
hp->grid[(i+2)%3]; |
55 |
< |
for (j = 0; j < 3; j++) |
56 |
< |
hp->gv[i][1][j] *= d; |
43 |
> |
d = DOT(hp->wn[i],hp->xv[i]); |
44 |
> |
hp->wo[i<<1|1] = hp->wo[i<<1] + d; |
45 |
> |
hp->wg[i] = (double)hp->grid[i] / d; |
46 |
|
} |
47 |
|
/* compute linear depth range */ |
48 |
|
hp->tlin = VLEN(hp->xv[0]) + VLEN(hp->xv[1]) + VLEN(hp->xv[2]); |
237 |
|
} |
238 |
|
|
239 |
|
|
240 |
+ |
hdgrid(gp, hp, wp) /* compute grid coordinates */ |
241 |
+ |
FVECT gp; /* returned */ |
242 |
+ |
register HOLO *hp; |
243 |
+ |
FVECT wp; |
244 |
+ |
{ |
245 |
+ |
FVECT vt; |
246 |
+ |
|
247 |
+ |
vt[0] = wp[0] - hp->orig[0]; |
248 |
+ |
vt[1] = wp[1] - hp->orig[1]; |
249 |
+ |
vt[2] = wp[2] - hp->orig[2]; |
250 |
+ |
gp[0] = DOT(vt, hp->wn[0]) * hp->wg[0]; |
251 |
+ |
gp[1] = DOT(vt, hp->wn[1]) * hp->wg[1]; |
252 |
+ |
gp[2] = DOT(vt, hp->wn[2]) * hp->wg[2]; |
253 |
+ |
} |
254 |
+ |
|
255 |
+ |
|
256 |
+ |
hdworld(wp, hp, gp) /* compute world coordinates */ |
257 |
+ |
register FVECT wp; |
258 |
+ |
register HOLO *hp; |
259 |
+ |
register FVECT gp; |
260 |
+ |
{ |
261 |
+ |
VSUM(wp, hp->orig, hp->xv[0], gp[0]); |
262 |
+ |
VSUM(wp, wp, hp->xv[1], gp[1]); |
263 |
+ |
VSUM(wp, wp, hp->xv[2], gp[2]); |
264 |
+ |
} |
265 |
+ |
|
266 |
+ |
|
267 |
|
double |
268 |
|
hdray(ro, rd, hp, gc, r) /* compute ray within a beam */ |
269 |
|
FVECT ro, rd; /* returned */ |
344 |
|
vt[0] = p[i][0] - hp->orig[0]; |
345 |
|
vt[1] = p[i][1] - hp->orig[1]; |
346 |
|
vt[2] = p[i][2] - hp->orig[2]; |
347 |
< |
if (gc[i].w & 1) { |
348 |
< |
v = hp->xv[gc[i].w>>1]; |
333 |
< |
vt[0] -= *v++; vt[1] -= *v++; vt[2] -= *v; |
334 |
< |
} |
335 |
< |
v = hp->gv[gc[i].w>>1][0]; |
336 |
< |
d = DOT(vt, v); |
347 |
> |
v = hp->wn[wg0[gc[i].w]]; |
348 |
> |
d = DOT(vt, v) * hp->wg[wg0[gc[i].w]]; |
349 |
|
if (d < 0. || (gc[i].i[0] = d) >= hp->grid[wg0[gc[i].w]]) |
350 |
|
return(FHUGE); /* outside wall */ |
351 |
|
r[i][0] = 256. * (d - gc[i].i[0]); |
352 |
< |
v = hp->gv[gc[i].w>>1][1]; |
353 |
< |
d = DOT(vt, v); |
352 |
> |
v = hp->wn[wg1[gc[i].w]]; |
353 |
> |
d = DOT(vt, v) * hp->wg[wg1[gc[i].w]]; |
354 |
|
if (d < 0. || (gc[i].i[1] = d) >= hp->grid[wg1[gc[i].w]]) |
355 |
|
return(FHUGE); /* outside wall */ |
356 |
|
r[i][1] = 256. * (d - gc[i].i[1]); |