34 |
|
{0, 5, NULL, Lambfa}, NULL, |
35 |
|
}; /* a Lambertian surface */ |
36 |
|
|
37 |
+ |
static OBJREC Aftplane; /* aft clipping plane object */ |
38 |
+ |
|
39 |
|
static int raymove(), checkset(), checkhit(); |
40 |
|
|
41 |
|
#define MAXLOOP 128 /* modifier loop detection */ |
69 |
|
r->rweight = ro->rweight * rw; |
70 |
|
r->crtype = ro->crtype | (r->rtype = rt); |
71 |
|
VCOPY(r->rorg, ro->rop); |
72 |
+ |
r->rmax = 0.0; |
73 |
|
} |
74 |
|
rayclear(r); |
75 |
|
return(r->rlvl <= maxdepth && r->rweight >= minweight ? 0 : -1); |
81 |
|
{ |
82 |
|
r->rno = raynum++; |
83 |
|
r->newcset = r->clipset; |
84 |
< |
r->ro = NULL; |
85 |
< |
r->rot = FHUGE; |
84 |
> |
if (r->rmax > FTINY) { |
85 |
> |
r->ro = &Aftplane; |
86 |
> |
r->rot = r->rmax; |
87 |
> |
r->rop[0] = r->rorg[0] + r->rot*r->rdir[0]; |
88 |
> |
r->rop[1] = r->rorg[1] + r->rot*r->rdir[1]; |
89 |
> |
r->rop[2] = r->rorg[2] + r->rot*r->rdir[2]; |
90 |
> |
} else { |
91 |
> |
r->ro = NULL; |
92 |
> |
r->rot = FHUGE; |
93 |
> |
} |
94 |
|
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
95 |
|
setcolor(r->pcol, 1.0, 1.0, 1.0); |
96 |
|
setcolor(r->rcol, 0.0, 0.0, 0.0); |
106 |
|
|
107 |
|
if (localhit(r, &thescene)) |
108 |
|
gotmat = raycont(r); |
109 |
< |
else if (sourcehit(r)) |
109 |
> |
else if (r->ro == &Aftplane) { |
110 |
> |
r->ro = NULL; |
111 |
> |
r->rot = FHUGE; |
112 |
> |
} else if (sourcehit(r)) |
113 |
|
gotmat = rayshade(r, r->ro->omod); |
114 |
|
|
115 |
< |
if (!gotmat) |
115 |
> |
if (r->ro != NULL && !gotmat) |
116 |
|
objerror(r->ro, USER, "material not found"); |
117 |
|
|
118 |
|
if (trace != NULL) |
170 |
|
if (irr_ignore(m->otype)) { |
171 |
|
depth--; |
172 |
|
raytrans(r); |
173 |
< |
return; |
173 |
> |
return(1); |
174 |
|
} |
175 |
|
if (!islight(m->otype)) |
176 |
|
m = &Lamb; |
214 |
|
double coef; |
215 |
|
{ |
216 |
|
RAY fr, br; |
203 |
– |
COLOR ctmp; |
217 |
|
int foremat, backmat; |
218 |
|
register int i; |
219 |
|
/* clip coefficient */ |
221 |
|
coef = 1.0; |
222 |
|
else if (coef < 0.0) |
223 |
|
coef = 0.0; |
224 |
+ |
/* compute foreground and background */ |
225 |
+ |
foremat = backmat = -1; |
226 |
|
/* foreground */ |
227 |
|
copystruct(&fr, r); |
213 |
– |
fr.pert[0] = fr.pert[1] = fr.pert[2] = 0.0; |
214 |
– |
setcolor(fr.pcol, 1.0, 1.0, 1.0); |
215 |
– |
setcolor(fr.rcol, 0.0, 0.0, 0.0); |
228 |
|
if (fore != OVOID && coef > FTINY) |
229 |
|
foremat = rayshade(&fr, fore); |
218 |
– |
else |
219 |
– |
foremat = 0; |
230 |
|
/* background */ |
231 |
|
copystruct(&br, r); |
222 |
– |
br.pert[0] = br.pert[1] = br.pert[2] = 0.0; |
223 |
– |
setcolor(br.pcol, 1.0, 1.0, 1.0); |
224 |
– |
setcolor(br.rcol, 0.0, 0.0, 0.0); |
232 |
|
if (back != OVOID && coef < 1.0-FTINY) |
233 |
|
backmat = rayshade(&br, back); |
227 |
– |
else |
228 |
– |
backmat = foremat; |
234 |
|
/* check */ |
235 |
< |
if ((backmat==0) != (foremat==0)) |
235 |
> |
if (foremat < 0) |
236 |
> |
if (backmat < 0) |
237 |
> |
foremat = backmat = 0; |
238 |
> |
else |
239 |
> |
foremat = backmat; |
240 |
> |
else if (backmat < 0) |
241 |
> |
backmat = foremat; |
242 |
> |
if ((foremat==0) != (backmat==0)) |
243 |
|
objerror(r->ro, USER, "mixing material with non-material"); |
244 |
< |
/* sum perturbations */ |
244 |
> |
/* mix perturbations */ |
245 |
|
for (i = 0; i < 3; i++) |
246 |
< |
r->pert[i] += coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
247 |
< |
/* multiply pattern colors */ |
246 |
> |
r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
247 |
> |
/* mix pattern colors */ |
248 |
|
scalecolor(fr.pcol, coef); |
249 |
|
scalecolor(br.pcol, 1.0-coef); |
250 |
< |
copycolor(ctmp, fr.pcol); |
251 |
< |
addcolor(ctmp, br.pcol); |
252 |
< |
multcolor(r->pcol, ctmp); |
253 |
< |
/* sum returned ray values */ |
254 |
< |
scalecolor(fr.rcol, coef); |
255 |
< |
scalecolor(br.rcol, 1.0-coef); |
256 |
< |
addcolor(r->rcol, fr.rcol); |
257 |
< |
addcolor(r->rcol, br.rcol); |
246 |
< |
if (foremat) |
250 |
> |
copycolor(r->pcol, fr.pcol); |
251 |
> |
addcolor(r->pcol, br.pcol); |
252 |
> |
/* mix returned ray values */ |
253 |
> |
if (foremat) { |
254 |
> |
scalecolor(fr.rcol, coef); |
255 |
> |
scalecolor(br.rcol, 1.0-coef); |
256 |
> |
copycolor(r->rcol, fr.rcol); |
257 |
> |
addcolor(r->rcol, br.rcol); |
258 |
|
r->rt = bright(fr.rcol) > bright(br.rcol) ? fr.rt : br.rt; |
259 |
+ |
} |
260 |
|
/* return value tells if material */ |
261 |
|
return(foremat); |
262 |
|
} |
392 |
|
return(0); |
393 |
|
} |
394 |
|
cxset[0] = 0; |
395 |
< |
return(raymove(curpos, cxset, sflags, r, scene) == RAYHIT); |
395 |
> |
return(raymove(curpos, cxset, sflags, r, scene) == RAYHIT && |
396 |
> |
r->ro != &Aftplane); |
397 |
|
} |
398 |
|
|
399 |
|
|