1 |
< |
/* Copyright (c) 1991 Regents of the University of California */ |
1 |
> |
/* Copyright (c) 1994 Regents of the University of California */ |
2 |
|
|
3 |
|
#ifndef lint |
4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
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); |
102 |
|
RAY *r; |
103 |
|
{ |
104 |
|
extern int (*trace)(); |
105 |
+ |
int gotmat; |
106 |
|
|
107 |
|
if (localhit(r, &thescene)) |
108 |
< |
raycont(r); |
109 |
< |
else if (sourcehit(r)) |
110 |
< |
rayshade(r, r->ro->omod); |
108 |
> |
gotmat = raycont(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 (r->ro != NULL && !gotmat) |
116 |
+ |
objerror(r->ro, USER, "material not found"); |
117 |
+ |
|
118 |
|
if (trace != NULL) |
119 |
|
(*trace)(r); /* trace execution */ |
120 |
|
} |
123 |
|
raycont(r) /* check for clipped object and continue */ |
124 |
|
register RAY *r; |
125 |
|
{ |
126 |
< |
if (r->clipset != NULL && inset(r->clipset, r->ro->omod)) |
126 |
> |
if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
127 |
> |
r->ro->omod == OVOID) { |
128 |
|
raytrans(r); |
129 |
< |
else |
130 |
< |
rayshade(r, r->ro->omod); |
129 |
> |
return(1); |
130 |
> |
} |
131 |
> |
return(rayshade(r, r->ro->omod)); |
132 |
|
} |
133 |
|
|
134 |
|
|
151 |
|
int mod; |
152 |
|
{ |
153 |
|
static int depth = 0; |
154 |
+ |
int gotmat; |
155 |
|
register OBJREC *m; |
156 |
|
/* check for infinite loop */ |
157 |
|
if (depth++ >= MAXLOOP) |
158 |
|
objerror(r->ro, USER, "possible modifier loop"); |
159 |
|
r->rt = r->rot; /* set effective ray length */ |
160 |
< |
for ( ; mod != OVOID; mod = m->omod) { |
160 |
> |
for (gotmat = 0; !gotmat && mod != OVOID; mod = m->omod) { |
161 |
|
m = objptr(mod); |
162 |
|
/****** unnecessary test since modifier() is always called |
163 |
|
if (!ismodifier(m->otype)) { |
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; |
177 |
|
} |
178 |
< |
(*ofun[m->otype].funp)(m, r); /* execute function */ |
179 |
< |
if (ismaterial(m->otype)) { /* materials call raytexture */ |
159 |
< |
depth--; |
160 |
< |
return; /* we're done */ |
161 |
< |
} |
178 |
> |
/* materials call raytexture */ |
179 |
> |
gotmat = (*ofun[m->otype].funp)(m, r); |
180 |
|
} |
181 |
< |
objerror(r->ro, USER, "material not found"); |
181 |
> |
depth--; |
182 |
> |
return(gotmat); |
183 |
|
} |
184 |
|
|
185 |
|
|
195 |
|
/* execute textures and patterns */ |
196 |
|
for ( ; mod != OVOID; mod = m->omod) { |
197 |
|
m = objptr(mod); |
198 |
< |
if (!istexture(m->otype)) { |
198 |
> |
/****** unnecessary test since modifier() is always called |
199 |
> |
if (!ismodifier(m->otype)) { |
200 |
|
sprintf(errmsg, "illegal modifier \"%s\"", m->oname); |
201 |
|
error(USER, errmsg); |
202 |
|
} |
203 |
< |
(*ofun[m->otype].funp)(m, r); |
203 |
> |
******/ |
204 |
> |
if ((*ofun[m->otype].funp)(m, r)) |
205 |
> |
objerror(r->ro, USER, "conflicting materials"); |
206 |
|
} |
207 |
|
depth--; /* end here */ |
208 |
|
} |
213 |
|
OBJECT fore, back; |
214 |
|
double coef; |
215 |
|
{ |
216 |
< |
FVECT curpert, forepert, backpert; |
217 |
< |
COLOR curpcol, forepcol, backpcol; |
216 |
> |
RAY fr, br; |
217 |
> |
int foremat, backmat; |
218 |
|
register int i; |
219 |
|
/* clip coefficient */ |
220 |
|
if (coef > 1.0) |
221 |
|
coef = 1.0; |
222 |
|
else if (coef < 0.0) |
223 |
|
coef = 0.0; |
224 |
< |
/* save current mods */ |
225 |
< |
VCOPY(curpert, r->pert); |
226 |
< |
copycolor(curpcol, r->pcol); |
227 |
< |
/* compute new mods */ |
206 |
< |
/* foreground */ |
207 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
208 |
< |
setcolor(r->pcol, 1.0, 1.0, 1.0); |
224 |
> |
/* compute foreground and background */ |
225 |
> |
foremat = backmat = -1; |
226 |
> |
/* foreground */ |
227 |
> |
copystruct(&fr, r); |
228 |
|
if (fore != OVOID && coef > FTINY) |
229 |
< |
raytexture(r, fore); |
230 |
< |
VCOPY(forepert, r->pert); |
231 |
< |
copycolor(forepcol, r->pcol); |
213 |
< |
/* background */ |
214 |
< |
r->pert[0] = r->pert[1] = r->pert[2] = 0.0; |
215 |
< |
setcolor(r->pcol, 1.0, 1.0, 1.0); |
229 |
> |
foremat = rayshade(&fr, fore); |
230 |
> |
/* background */ |
231 |
> |
copystruct(&br, r); |
232 |
|
if (back != OVOID && coef < 1.0-FTINY) |
233 |
< |
raytexture(r, back); |
234 |
< |
VCOPY(backpert, r->pert); |
235 |
< |
copycolor(backpcol, r->pcol); |
236 |
< |
/* sum perturbations */ |
233 |
> |
backmat = rayshade(&br, back); |
234 |
> |
/* check */ |
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 |
> |
/* mix perturbations */ |
245 |
|
for (i = 0; i < 3; i++) |
246 |
< |
r->pert[i] = curpert[i] + coef*forepert[i] + |
247 |
< |
(1.0-coef)*backpert[i]; |
248 |
< |
/* multiply colors */ |
249 |
< |
setcolor(r->pcol, coef*colval(forepcol,RED) + |
250 |
< |
(1.0-coef)*colval(backpcol,RED), |
251 |
< |
coef*colval(forepcol,GRN) + |
252 |
< |
(1.0-coef)*colval(backpcol,GRN), |
253 |
< |
coef*colval(forepcol,BLU) + |
254 |
< |
(1.0-coef)*colval(backpcol,BLU)); |
255 |
< |
multcolor(r->pcol, curpcol); |
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(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 |
|
} |
263 |
|
|
264 |
|
|
360 |
|
sflags = 0; |
361 |
|
for (i = 0; i < 3; i++) { |
362 |
|
curpos[i] = r->rorg[i]; |
363 |
< |
if (r->rdir[i] > FTINY) |
363 |
> |
if (r->rdir[i] > 1e-7) |
364 |
|
sflags |= 1 << i; |
365 |
< |
else if (r->rdir[i] < -FTINY) |
365 |
> |
else if (r->rdir[i] < -1e-7) |
366 |
|
sflags |= 0x10 << i; |
367 |
|
} |
368 |
|
if (sflags == 0) |
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 |
|
|
494 |
|
checkset(oset, cxs); /* eliminate double-checking */ |
495 |
|
for (i = oset[0]; i > 0; i--) { |
496 |
|
o = objptr(oset[i]); |
466 |
– |
if (o->omod == OVOID && issurface(o->otype)) |
467 |
– |
continue; /* ignore void surfaces */ |
497 |
|
(*ofun[o->otype].funp)(o, r); |
498 |
|
} |
499 |
|
if (r->ro == NULL) |