40 |
|
/* check arguments */ |
41 |
|
if (m->oargs.nfargs != 3 || m->oargs.nsargs > 1) |
42 |
|
objerror(m, USER, "bad number of arguments"); |
43 |
< |
/* check if source ray */ |
44 |
< |
if (r->rsrc >= 0) { /* aiming for somebody */ |
45 |
< |
if (source[r->rsrc].so != r->ro) |
46 |
< |
return; /* but not us */ |
47 |
< |
} else if (m->oargs.nsargs > 0) { /* else call substitute? */ |
43 |
> |
/* check for substitute material */ |
44 |
> |
if (m->oargs.nsargs > 0 && |
45 |
> |
(r->rsrc < 0 || source[r->rsrc].so != r->ro)) { |
46 |
|
rayshade(r, modifier(m->oargs.sarg[0])); |
47 |
|
return; |
48 |
|
} |
49 |
+ |
/* check for bad source ray */ |
50 |
+ |
if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
51 |
+ |
return; |
52 |
+ |
|
53 |
|
if (r->rod < 0.) /* back is black */ |
54 |
|
return; |
55 |
|
/* get modifiers */ |
66 |
|
for (i = 0; i < 3; i++) |
67 |
|
nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
68 |
|
/* source we're aiming for next */ |
69 |
< |
nr.rsrc = source[r->rsrc].sa.svnext; |
69 |
> |
nr.rsrc = source[r->rsrc].sa.sv.sn; |
70 |
|
} else { /* ordinary reflection */ |
71 |
|
FVECT pnorm; |
72 |
|
double pdot; |
86 |
|
mir_proj(pm, o, s, n) /* compute a mirror's projection */ |
87 |
|
MAT4 pm; |
88 |
|
register OBJREC *o; |
89 |
< |
register SRCREC *s; |
89 |
> |
SRCREC *s; |
90 |
|
int n; |
91 |
|
{ |
92 |
|
FVECT nv; |
93 |
|
double od; |
94 |
|
/* get surface normal and offset */ |
95 |
< |
if (sfun[o->otype].of->getpleq == NULL) |
94 |
< |
return(0); /* reject non-planar case */ |
95 |
< |
od = (*sfun[o->otype].of->getpleq)(nv, o); |
95 |
> |
od = getplaneq(nv, o); |
96 |
|
/* check for behind */ |
97 |
|
if (DOT(s->sloc, nv) <= (s->sflags & SDISTANT ? FTINY : od+FTINY)) |
98 |
|
return(0); |
110 |
|
register int i, j; |
111 |
|
/* assign matrix */ |
112 |
|
setident4(m); |
113 |
< |
for (i = 0; i < 3; i++) |
114 |
< |
for (j = 0; j < 3; j++) |
113 |
> |
for (j = 0; j < 3; j++) { |
114 |
> |
for (i = 0; i < 3; i++) |
115 |
|
m[i][j] -= 2.*nv[i]*nv[j]; |
116 |
– |
for (j = 0; j < 3; j++) |
116 |
|
m[3][j] = 2.*offs*nv[j]; |
117 |
+ |
} |
118 |
|
} |