1 |
– |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
|
/* |
5 |
|
* Routines for light-redirecting materials and |
6 |
|
* their associated virtual light sources |
7 |
|
*/ |
8 |
|
|
9 |
< |
#include "ray.h" |
9 |
> |
#include "copyright.h" |
10 |
|
|
11 |
+ |
#include "ray.h" |
12 |
|
#include "otypes.h" |
13 |
< |
|
13 |
> |
#include "rtotypes.h" |
14 |
|
#include "source.h" |
17 |
– |
|
15 |
|
#include "func.h" |
16 |
|
|
17 |
|
/* |
28 |
|
* n A1 A2 .. An |
29 |
|
*/ |
30 |
|
|
31 |
+ |
static int redirect(OBJREC *m, RAY *r, int n); |
32 |
+ |
static int dir_proj(MAT4 pm, OBJREC *o, SRCREC *s, int n); |
33 |
|
|
35 |
– |
int dir_proj(); |
34 |
|
VSMATERIAL direct1_vs = {dir_proj, 1}; |
35 |
|
VSMATERIAL direct2_vs = {dir_proj, 2}; |
36 |
|
|
39 |
|
getfunc(m, 8, 0xff, 1) ) |
40 |
|
|
41 |
|
|
42 |
< |
m_direct(m, r) /* shade redirected ray */ |
43 |
< |
register OBJREC *m; |
44 |
< |
register RAY *r; |
42 |
> |
extern int |
43 |
> |
m_direct( /* shade redirected ray */ |
44 |
> |
register OBJREC *m, |
45 |
> |
register RAY *r |
46 |
> |
) |
47 |
|
{ |
48 |
|
/* check if source ray */ |
49 |
|
if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
50 |
< |
return; /* got the wrong guy */ |
50 |
> |
return(1); /* got the wrong guy */ |
51 |
|
/* compute first projection */ |
52 |
|
if (m->otype == MAT_DIRECT1 || |
53 |
|
(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 0)) |
56 |
|
if (m->otype == MAT_DIRECT2 && |
57 |
|
(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 1)) |
58 |
|
redirect(m, r, 1); |
59 |
+ |
return(1); |
60 |
|
} |
61 |
|
|
62 |
|
|
63 |
< |
redirect(m, r, n) /* compute n'th ray redirection */ |
64 |
< |
OBJREC *m; |
65 |
< |
RAY *r; |
66 |
< |
int n; |
63 |
> |
static int |
64 |
> |
redirect( /* compute n'th ray redirection */ |
65 |
> |
OBJREC *m, |
66 |
> |
RAY *r, |
67 |
> |
int n |
68 |
> |
) |
69 |
|
{ |
70 |
|
MFUNC *mf; |
71 |
|
register EPNODE **va; |
72 |
+ |
FVECT nsdir; |
73 |
|
RAY nr; |
74 |
|
double coef; |
75 |
|
register int j; |
76 |
|
/* set up function */ |
77 |
|
mf = getdfunc(m); |
78 |
|
setfunc(m, r); |
79 |
+ |
/* assign direction variable */ |
80 |
+ |
if (r->rsrc >= 0) { |
81 |
+ |
register SRCREC *sp = source + source[r->rsrc].sa.sv.sn; |
82 |
+ |
|
83 |
+ |
if (sp->sflags & SDISTANT) |
84 |
+ |
VCOPY(nsdir, sp->sloc); |
85 |
+ |
else { |
86 |
+ |
for (j = 0; j < 3; j++) |
87 |
+ |
nsdir[j] = sp->sloc[j] - r->rop[j]; |
88 |
+ |
normalize(nsdir); |
89 |
+ |
} |
90 |
+ |
multv3(nsdir, nsdir, funcxf.xfm); |
91 |
+ |
varset("DxA", '=', nsdir[0]/funcxf.sca); |
92 |
+ |
varset("DyA", '=', nsdir[1]/funcxf.sca); |
93 |
+ |
varset("DzA", '=', nsdir[2]/funcxf.sca); |
94 |
+ |
} else { |
95 |
+ |
varset("DxA", '=', 0.0); |
96 |
+ |
varset("DyA", '=', 0.0); |
97 |
+ |
varset("DzA", '=', 0.0); |
98 |
+ |
} |
99 |
|
/* compute coefficient */ |
100 |
|
errno = 0; |
101 |
|
va = mf->ep + 4*n; |
102 |
|
coef = evalue(va[0]); |
103 |
< |
if (errno) |
103 |
> |
if ((errno == EDOM) | (errno == ERANGE)) |
104 |
|
goto computerr; |
105 |
< |
if (coef <= FTINY || rayorigin(&nr, r, TRANS, coef) < 0) |
105 |
> |
setcolor(nr.rcoef, coef, coef, coef); |
106 |
> |
if (rayorigin(&nr, TRANS, r, nr.rcoef) < 0) |
107 |
|
return(0); |
108 |
|
va++; /* compute direction */ |
109 |
|
for (j = 0; j < 3; j++) { |
110 |
|
nr.rdir[j] = evalue(va[j]); |
111 |
< |
if (errno) |
111 |
> |
if (errno == EDOM || errno == ERANGE) |
112 |
|
goto computerr; |
113 |
|
} |
114 |
|
if (mf->f != &unitxf) |
121 |
|
if (r->rsrc >= 0) |
122 |
|
nr.rsrc = source[r->rsrc].sa.sv.sn; |
123 |
|
rayvalue(&nr); |
124 |
< |
scalecolor(nr.rcol, coef); |
124 |
> |
multcolor(nr.rcol, nr.rcoef); |
125 |
|
addcolor(r->rcol, nr.rcol); |
126 |
+ |
if (r->ro != NULL && isflat(r->ro->otype)) |
127 |
+ |
r->rt = r->rot + nr.rt; |
128 |
|
return(1); |
129 |
|
computerr: |
130 |
|
objerror(m, WARNING, "compute error"); |
132 |
|
} |
133 |
|
|
134 |
|
|
135 |
< |
dir_proj(pm, o, s, n) /* compute a director's projection */ |
136 |
< |
MAT4 pm; |
137 |
< |
OBJREC *o; |
138 |
< |
SRCREC *s; |
139 |
< |
int n; |
135 |
> |
static int |
136 |
> |
dir_proj( /* compute a director's projection */ |
137 |
> |
MAT4 pm, |
138 |
> |
OBJREC *o, |
139 |
> |
SRCREC *s, |
140 |
> |
int n |
141 |
> |
) |
142 |
|
{ |
143 |
|
RAY tr; |
144 |
|
OBJREC *m; |
166 |
|
olddot = DOT(tr.rdir, nv); |
167 |
|
if (olddot <= FTINY && olddot >= -FTINY) |
168 |
|
return(0); /* old dir parallels plane */ |
169 |
< |
rayorigin(&tr, NULL, PRIMARY, 1.0); |
169 |
> |
tr.rmax = 0.0; |
170 |
> |
rayorigin(&tr, PRIMARY, NULL, NULL); |
171 |
|
if (!(*ofun[o->otype].funp)(o, &tr)) |
172 |
|
return(0); /* no intersection! */ |
173 |
|
/* compute redirection */ |
174 |
|
m = vsmaterial(o); |
175 |
|
mf = getdfunc(m); |
176 |
|
setfunc(m, &tr); |
177 |
+ |
varset("DxA", '=', 0.0); |
178 |
+ |
varset("DyA", '=', 0.0); |
179 |
+ |
varset("DzA", '=', 0.0); |
180 |
|
errno = 0; |
181 |
|
va = mf->ep + 4*n; |
182 |
|
coef = evalue(va[0]); |
183 |
< |
if (errno) |
183 |
> |
if (errno == EDOM || errno == ERANGE) |
184 |
|
goto computerr; |
185 |
|
if (coef <= FTINY) |
186 |
|
return(0); /* insignificant */ |
187 |
|
va++; |
188 |
|
for (i = 0; i < 3; i++) { |
189 |
|
newdir[i] = evalue(va[i]); |
190 |
< |
if (errno) |
190 |
> |
if (errno == EDOM || errno == ERANGE) |
191 |
|
goto computerr; |
192 |
|
} |
193 |
|
if (mf->f != &unitxf) |
205 |
|
pm[i][j] += nv[i]*h[j]; |
206 |
|
pm[3][j] = -od*h[j]; |
207 |
|
} |
208 |
< |
if (newdot > 0.0 ^ olddot > 0.0) /* add mirroring */ |
208 |
> |
if ((newdot > 0.0) ^ (olddot > 0.0)) /* add mirroring */ |
209 |
|
for (j = 0; j < 3; j++) { |
210 |
|
for (i = 0; i < 3; i++) |
211 |
|
pm[i][j] -= 2.*nv[i]*nv[j]; |