1 |
gwlarson |
3.1 |
#ifndef lint |
2 |
schorsch |
3.6 |
static const char RCSid[] = "$Id: rglmat.c,v 3.5 2003/09/16 06:31:48 greg Exp $"; |
3 |
gwlarson |
3.1 |
#endif |
4 |
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/* |
5 |
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* Routines for Radiance -> OpenGL materials. |
6 |
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*/ |
7 |
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8 |
greg |
3.3 |
#include "copyright.h" |
9 |
greg |
3.2 |
|
10 |
gwlarson |
3.1 |
#include "radogl.h" |
11 |
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12 |
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int domats = 1; /* are we doing materials? */ |
13 |
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14 |
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LUTAB mtab = LU_SINIT(free,freemtl); |
15 |
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16 |
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17 |
greg |
3.2 |
void |
18 |
gwlarson |
3.1 |
rgl_matclear() /* clean up materials */ |
19 |
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{ |
20 |
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lu_done(&mtab); |
21 |
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domats = 1; |
22 |
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} |
23 |
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24 |
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25 |
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MATREC * |
26 |
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getmatp(nam) /* find material record for modifier name */ |
27 |
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char *nam; |
28 |
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{ |
29 |
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register LUENT *lup; |
30 |
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31 |
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if (nam == NULL) |
32 |
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return(NULL); |
33 |
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if ((lup = lu_find(&mtab, nam)) == NULL) |
34 |
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return(NULL); |
35 |
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return((MATREC *)lup->data); |
36 |
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} |
37 |
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38 |
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39 |
greg |
3.2 |
int |
40 |
gwlarson |
3.1 |
o_default(o) /* default object is non-material modifier */ |
41 |
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register OBJREC *o; |
42 |
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{ |
43 |
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register LUENT *lup; |
44 |
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#ifdef DEBUG |
45 |
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if (o->otype >= 0 && !ismodifier(o->otype)) |
46 |
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error(CONSISTENCY, "o_default handed non-modifier"); |
47 |
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#endif |
48 |
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/* find name in lookup table */ |
49 |
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if ((lup = lu_find(&mtab, o->oname)) == NULL) |
50 |
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goto memerr; |
51 |
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if (lup->key == NULL) { /* new entry? */ |
52 |
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lup->key = (char *)malloc(strlen(o->oname)+1); |
53 |
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if (lup->key == NULL) |
54 |
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goto memerr; |
55 |
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strcpy(lup->key, o->oname); |
56 |
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} else if (lup->data != NULL) |
57 |
greg |
3.5 |
freemtl(lup->data); |
58 |
gwlarson |
3.1 |
if ((lup->data = o->os) != NULL) /* make material reference */ |
59 |
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((MATREC *)lup->data)->nlinks++; |
60 |
greg |
3.4 |
return(0); |
61 |
gwlarson |
3.1 |
memerr: |
62 |
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error(SYSTEM, "out of memory in o_default"); |
63 |
greg |
3.4 |
return(0); |
64 |
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} |
65 |
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66 |
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67 |
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int |
68 |
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o_unsupported(o) /* unsupported object primitive */ |
69 |
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OBJREC *o; |
70 |
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{ |
71 |
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objerror(o, WARNING, "unsupported type"); |
72 |
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return(0); |
73 |
gwlarson |
3.1 |
} |
74 |
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75 |
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76 |
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MATREC * |
77 |
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newmaterial(nam) /* get an entry for a new material */ |
78 |
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char *nam; |
79 |
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{ |
80 |
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register LUENT *lup; |
81 |
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/* look it up (assign entry) */ |
82 |
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if ((lup = lu_find(&mtab, nam)) == NULL) |
83 |
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goto memerr; |
84 |
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if (lup->key == NULL) { /* new entry? */ |
85 |
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lup->key = (char *)malloc(strlen(nam)+1); |
86 |
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if (lup->key == NULL) |
87 |
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goto memerr; |
88 |
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strcpy(lup->key, nam); |
89 |
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} else if (lup->data != NULL) |
90 |
greg |
3.5 |
freemtl(lup->data); |
91 |
gwlarson |
3.1 |
lup->data = (char *)malloc(sizeof(MATREC)); |
92 |
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if (lup->data == NULL) |
93 |
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goto memerr; |
94 |
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((MATREC *)lup->data)->nlinks = 1; |
95 |
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return((MATREC *)lup->data); |
96 |
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memerr: |
97 |
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error(SYSTEM, "out of memory in newmaterial"); |
98 |
schorsch |
3.6 |
return NULL; /* pro forma return */ |
99 |
gwlarson |
3.1 |
} |
100 |
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101 |
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102 |
greg |
3.2 |
void |
103 |
greg |
3.5 |
freemtl(p) /* free a material */ |
104 |
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void *p; |
105 |
gwlarson |
3.1 |
{ |
106 |
greg |
3.5 |
register MATREC *mp = (MATREC *)p; |
107 |
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108 |
gwlarson |
3.1 |
if (!--mp->nlinks) |
109 |
greg |
3.2 |
free((void *)mp); |
110 |
gwlarson |
3.1 |
} |
111 |
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112 |
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113 |
greg |
3.2 |
int |
114 |
gwlarson |
3.1 |
m_normal(o) /* compute normal material parameters */ |
115 |
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register OBJREC *o; |
116 |
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{ |
117 |
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register MATREC *m; |
118 |
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/* check arguments */ |
119 |
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if (o->oargs.nfargs != (o->otype == MAT_TRANS ? 7 : 5)) |
120 |
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objerror(o, USER, "bad # of real arguments"); |
121 |
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/* allocate/insert material */ |
122 |
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m = newmaterial(o->oname); |
123 |
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/* assign parameters */ |
124 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
125 |
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o->oargs.farg[1], o->oargs.farg[2]); |
126 |
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if ((m->type = o->otype) == MAT_METAL) |
127 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
128 |
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else |
129 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
130 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
131 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
132 |
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if (m->type == MAT_TRANS) { |
133 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[5]); |
134 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[5]); |
135 |
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} |
136 |
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if (o->oargs.farg[4] <= FTINY) |
137 |
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m->u.m.specexp = MAXSPECEXP; |
138 |
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else |
139 |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[4]); |
140 |
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if (m->u.m.specexp > MAXSPECEXP) |
141 |
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m->u.m.specexp = MAXSPECEXP; |
142 |
greg |
3.4 |
return(0); |
143 |
gwlarson |
3.1 |
} |
144 |
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145 |
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146 |
greg |
3.2 |
int |
147 |
gwlarson |
3.1 |
m_aniso(o) /* anisotropic material */ |
148 |
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register OBJREC *o; |
149 |
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{ |
150 |
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register MATREC *m; |
151 |
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/* check arguments */ |
152 |
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if (o->oargs.nfargs < (o->otype == MAT_TRANS2 ? 8 : 6)) |
153 |
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objerror(o, USER, "bad # of real arguments"); |
154 |
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/* allocate/insert material */ |
155 |
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m = newmaterial(o->oname); |
156 |
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/* assign parameters */ |
157 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
158 |
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o->oargs.farg[1], o->oargs.farg[2]); |
159 |
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if ((m->type = o->otype) == MAT_METAL2) |
160 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
161 |
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else |
162 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
163 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
164 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
165 |
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if (m->type == MAT_TRANS2) { |
166 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[6]); |
167 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[6]); |
168 |
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} |
169 |
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if (o->oargs.farg[4]*o->oargs.farg[5] <= FTINY*FTINY) |
170 |
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m->u.m.specexp = MAXSPECEXP; |
171 |
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else |
172 |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[5]); |
173 |
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if (m->u.m.specexp > MAXSPECEXP) |
174 |
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m->u.m.specexp = MAXSPECEXP; |
175 |
greg |
3.4 |
return(0); |
176 |
gwlarson |
3.1 |
} |
177 |
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178 |
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179 |
greg |
3.2 |
int |
180 |
gwlarson |
3.1 |
m_glass(o) /* glass material (hopeless) */ |
181 |
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OBJREC *o; |
182 |
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{ |
183 |
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register MATREC *m; |
184 |
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185 |
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m = newmaterial(o->oname); |
186 |
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m->type = o->otype; |
187 |
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setcolor(m->u.m.ambdiff, 0., 0., 0.); |
188 |
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setcolor(m->u.m.specular, .08, .08, .08); |
189 |
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m->u.m.specexp = MAXSPECEXP; |
190 |
greg |
3.4 |
return(0); |
191 |
gwlarson |
3.1 |
} |
192 |
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193 |
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194 |
greg |
3.2 |
int |
195 |
gwlarson |
3.1 |
m_brdf(o) /* convert functional material */ |
196 |
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register OBJREC *o; |
197 |
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{ |
198 |
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register MATREC *m; |
199 |
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/* check arguments */ |
200 |
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if (o->oargs.nfargs < (o->otype == MAT_TFUNC ? 6 : 4)) |
201 |
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objerror(o, USER, "bad # of real arguments"); |
202 |
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/* allocate/insert material */ |
203 |
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m = newmaterial(o->oname); |
204 |
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/* assign parameters */ |
205 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
206 |
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o->oargs.farg[1], o->oargs.farg[2]); |
207 |
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if ((m->type = o->otype) == MAT_MFUNC) |
208 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
209 |
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else |
210 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
211 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
212 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
213 |
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if (m->type == MAT_TFUNC) { |
214 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[4]); |
215 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[4]); |
216 |
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} |
217 |
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m->u.m.specexp = UNKSPECEXP; |
218 |
greg |
3.4 |
return(0); |
219 |
gwlarson |
3.1 |
} |
220 |
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221 |
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222 |
greg |
3.2 |
int |
223 |
gwlarson |
3.1 |
m_brdf2(o) /* convert advanced functional material */ |
224 |
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register OBJREC *o; |
225 |
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{ |
226 |
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register MATREC *m; |
227 |
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|
228 |
|
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if (o->oargs.nfargs < 9) |
229 |
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objerror(o, USER, "bad # of real arguments"); |
230 |
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m = newmaterial(o->oname); |
231 |
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m->type = o->otype; |
232 |
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/* assign average diffuse front+back */ |
233 |
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setcolor(m->u.m.ambdiff, (o->oargs.farg[0]+o->oargs.farg[3])*.5, |
234 |
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(o->oargs.farg[1]+o->oargs.farg[4])*.5, |
235 |
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(o->oargs.farg[2]+o->oargs.farg[5])*.5); |
236 |
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/* guess the rest */ |
237 |
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setcolor(m->u.m.specular, .1, .1, .1); |
238 |
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m->u.m.specexp = UNKSPECEXP; |
239 |
greg |
3.4 |
return(0); |
240 |
gwlarson |
3.1 |
} |
241 |
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242 |
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|
243 |
greg |
3.2 |
int |
244 |
gwlarson |
3.1 |
m_light(o) /* convert light type */ |
245 |
|
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register OBJREC *o; |
246 |
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{ |
247 |
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FVECT v; |
248 |
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register MATREC *m; |
249 |
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|
250 |
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if (o->oargs.nfargs < (o->otype == MAT_SPOT ? 7 : 3)) |
251 |
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objerror(o, USER, "bad # of real arguments"); |
252 |
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m = newmaterial(o->oname); |
253 |
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setcolor(m->u.l.emission, o->oargs.farg[0], |
254 |
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o->oargs.farg[1], o->oargs.farg[2]); |
255 |
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if ((m->type = o->otype) == MAT_SPOT) { |
256 |
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if ((m->u.l.spotang = o->oargs.farg[3]/2.) > 90.) |
257 |
|
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m->u.l.spotang = 180.; |
258 |
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v[0] = o->oargs.farg[4]; |
259 |
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v[1] = o->oargs.farg[5]; |
260 |
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v[2] = o->oargs.farg[6]; |
261 |
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if (normalize(v) == 0.) |
262 |
|
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objerror(o, USER, "illegal direction"); |
263 |
|
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VCOPY(m->u.l.spotdir, v); |
264 |
|
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} else { |
265 |
|
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m->u.l.spotang = 180.; |
266 |
|
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m->u.l.spotdir[0] = m->u.l.spotdir[1] = 0.; |
267 |
|
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m->u.l.spotdir[2] = -1.; |
268 |
|
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} |
269 |
greg |
3.4 |
return(0); |
270 |
gwlarson |
3.1 |
} |
271 |
|
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|
272 |
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|
273 |
greg |
3.2 |
int |
274 |
gwlarson |
3.1 |
m_mirror(o) /* convert mirror type */ |
275 |
|
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register OBJREC *o; |
276 |
|
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{ |
277 |
|
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register MATREC *m; |
278 |
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|
279 |
|
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if (o->oargs.nfargs != 3) |
280 |
|
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objerror(o, USER, "bad # real arguments"); |
281 |
|
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m = newmaterial(o->oname); |
282 |
|
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m->type = o->otype; |
283 |
|
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setcolor(m->u.m.ambdiff, 0., 0., 0.); |
284 |
|
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setcolor(m->u.m.specular, o->oargs.farg[0], |
285 |
|
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o->oargs.farg[1], o->oargs.farg[2]); |
286 |
|
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m->u.m.specexp = MAXSPECEXP; |
287 |
greg |
3.4 |
return(0); |
288 |
gwlarson |
3.1 |
} |
289 |
|
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|
290 |
|
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|
291 |
greg |
3.2 |
int |
292 |
gwlarson |
3.1 |
m_prism(o) /* convert prism type */ |
293 |
|
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register OBJREC *o; |
294 |
|
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{ |
295 |
|
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register MATREC *m; |
296 |
|
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/* can't really deal with this type */ |
297 |
|
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m = newmaterial(o->oname); |
298 |
|
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m->type = o->otype; |
299 |
|
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setcolor(m->u.m.ambdiff, 0.2, 0.2, 0.2); |
300 |
|
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setcolor(m->u.m.specular, 0.1, 0.1, 0.1); |
301 |
|
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m->u.m.specexp = UNKSPECEXP; |
302 |
greg |
3.4 |
return(0); |
303 |
gwlarson |
3.1 |
} |