1 |
gwlarson |
3.1 |
#ifndef lint |
2 |
greg |
3.2 |
static const char RCSid[] = "$Id$"; |
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 |
3.2 |
/* ==================================================================== |
9 |
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* The Radiance Software License, Version 1.0 |
10 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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65 |
gwlarson |
3.1 |
#include "radogl.h" |
66 |
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67 |
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int domats = 1; /* are we doing materials? */ |
68 |
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|
69 |
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LUTAB mtab = LU_SINIT(free,freemtl); |
70 |
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71 |
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72 |
greg |
3.2 |
void |
73 |
gwlarson |
3.1 |
rgl_matclear() /* clean up materials */ |
74 |
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{ |
75 |
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lu_done(&mtab); |
76 |
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domats = 1; |
77 |
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} |
78 |
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79 |
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80 |
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MATREC * |
81 |
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getmatp(nam) /* find material record for modifier name */ |
82 |
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char *nam; |
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{ |
84 |
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register LUENT *lup; |
85 |
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86 |
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if (nam == NULL) |
87 |
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return(NULL); |
88 |
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if ((lup = lu_find(&mtab, nam)) == NULL) |
89 |
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return(NULL); |
90 |
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return((MATREC *)lup->data); |
91 |
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} |
92 |
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93 |
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94 |
greg |
3.2 |
int |
95 |
gwlarson |
3.1 |
o_default(o) /* default object is non-material modifier */ |
96 |
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register OBJREC *o; |
97 |
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{ |
98 |
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register LUENT *lup; |
99 |
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#ifdef DEBUG |
100 |
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if (o->otype >= 0 && !ismodifier(o->otype)) |
101 |
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error(CONSISTENCY, "o_default handed non-modifier"); |
102 |
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#endif |
103 |
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/* find name in lookup table */ |
104 |
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if ((lup = lu_find(&mtab, o->oname)) == NULL) |
105 |
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goto memerr; |
106 |
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if (lup->key == NULL) { /* new entry? */ |
107 |
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lup->key = (char *)malloc(strlen(o->oname)+1); |
108 |
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if (lup->key == NULL) |
109 |
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goto memerr; |
110 |
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strcpy(lup->key, o->oname); |
111 |
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} else if (lup->data != NULL) |
112 |
greg |
3.2 |
freemtl((MATREC *)lup->data); |
113 |
gwlarson |
3.1 |
if ((lup->data = o->os) != NULL) /* make material reference */ |
114 |
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((MATREC *)lup->data)->nlinks++; |
115 |
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return; |
116 |
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memerr: |
117 |
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error(SYSTEM, "out of memory in o_default"); |
118 |
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} |
119 |
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120 |
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121 |
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MATREC * |
122 |
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newmaterial(nam) /* get an entry for a new material */ |
123 |
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char *nam; |
124 |
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{ |
125 |
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register LUENT *lup; |
126 |
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/* look it up (assign entry) */ |
127 |
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if ((lup = lu_find(&mtab, nam)) == NULL) |
128 |
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goto memerr; |
129 |
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if (lup->key == NULL) { /* new entry? */ |
130 |
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lup->key = (char *)malloc(strlen(nam)+1); |
131 |
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if (lup->key == NULL) |
132 |
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goto memerr; |
133 |
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strcpy(lup->key, nam); |
134 |
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} else if (lup->data != NULL) |
135 |
greg |
3.2 |
freemtl((MATREC *)lup->data); |
136 |
gwlarson |
3.1 |
lup->data = (char *)malloc(sizeof(MATREC)); |
137 |
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if (lup->data == NULL) |
138 |
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goto memerr; |
139 |
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((MATREC *)lup->data)->nlinks = 1; |
140 |
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return((MATREC *)lup->data); |
141 |
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memerr: |
142 |
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error(SYSTEM, "out of memory in newmaterial"); |
143 |
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} |
144 |
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145 |
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146 |
greg |
3.2 |
void |
147 |
gwlarson |
3.1 |
freemtl(mp) /* free a material */ |
148 |
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register MATREC *mp; |
149 |
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{ |
150 |
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if (!--mp->nlinks) |
151 |
greg |
3.2 |
free((void *)mp); |
152 |
gwlarson |
3.1 |
} |
153 |
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154 |
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155 |
greg |
3.2 |
int |
156 |
gwlarson |
3.1 |
m_normal(o) /* compute normal material parameters */ |
157 |
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register OBJREC *o; |
158 |
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{ |
159 |
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register MATREC *m; |
160 |
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/* check arguments */ |
161 |
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if (o->oargs.nfargs != (o->otype == MAT_TRANS ? 7 : 5)) |
162 |
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objerror(o, USER, "bad # of real arguments"); |
163 |
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/* allocate/insert material */ |
164 |
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m = newmaterial(o->oname); |
165 |
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/* assign parameters */ |
166 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
167 |
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o->oargs.farg[1], o->oargs.farg[2]); |
168 |
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if ((m->type = o->otype) == MAT_METAL) |
169 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
170 |
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else |
171 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
172 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
173 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
174 |
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if (m->type == MAT_TRANS) { |
175 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[5]); |
176 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[5]); |
177 |
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} |
178 |
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if (o->oargs.farg[4] <= FTINY) |
179 |
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m->u.m.specexp = MAXSPECEXP; |
180 |
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else |
181 |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[4]); |
182 |
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if (m->u.m.specexp > MAXSPECEXP) |
183 |
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m->u.m.specexp = MAXSPECEXP; |
184 |
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} |
185 |
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186 |
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187 |
greg |
3.2 |
int |
188 |
gwlarson |
3.1 |
m_aniso(o) /* anisotropic material */ |
189 |
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register OBJREC *o; |
190 |
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{ |
191 |
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register MATREC *m; |
192 |
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/* check arguments */ |
193 |
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if (o->oargs.nfargs < (o->otype == MAT_TRANS2 ? 8 : 6)) |
194 |
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objerror(o, USER, "bad # of real arguments"); |
195 |
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/* allocate/insert material */ |
196 |
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m = newmaterial(o->oname); |
197 |
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/* assign parameters */ |
198 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
199 |
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o->oargs.farg[1], o->oargs.farg[2]); |
200 |
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if ((m->type = o->otype) == MAT_METAL2) |
201 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
202 |
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else |
203 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
204 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
205 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
206 |
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if (m->type == MAT_TRANS2) { |
207 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[6]); |
208 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[6]); |
209 |
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} |
210 |
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if (o->oargs.farg[4]*o->oargs.farg[5] <= FTINY*FTINY) |
211 |
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m->u.m.specexp = MAXSPECEXP; |
212 |
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else |
213 |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[5]); |
214 |
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if (m->u.m.specexp > MAXSPECEXP) |
215 |
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m->u.m.specexp = MAXSPECEXP; |
216 |
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} |
217 |
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218 |
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|
219 |
greg |
3.2 |
int |
220 |
gwlarson |
3.1 |
m_glass(o) /* glass material (hopeless) */ |
221 |
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OBJREC *o; |
222 |
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{ |
223 |
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register MATREC *m; |
224 |
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|
225 |
|
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m = newmaterial(o->oname); |
226 |
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m->type = o->otype; |
227 |
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setcolor(m->u.m.ambdiff, 0., 0., 0.); |
228 |
|
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setcolor(m->u.m.specular, .08, .08, .08); |
229 |
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m->u.m.specexp = MAXSPECEXP; |
230 |
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} |
231 |
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232 |
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|
233 |
greg |
3.2 |
int |
234 |
gwlarson |
3.1 |
m_brdf(o) /* convert functional material */ |
235 |
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register OBJREC *o; |
236 |
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{ |
237 |
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register MATREC *m; |
238 |
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/* check arguments */ |
239 |
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if (o->oargs.nfargs < (o->otype == MAT_TFUNC ? 6 : 4)) |
240 |
|
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objerror(o, USER, "bad # of real arguments"); |
241 |
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/* allocate/insert material */ |
242 |
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m = newmaterial(o->oname); |
243 |
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/* assign parameters */ |
244 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
245 |
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o->oargs.farg[1], o->oargs.farg[2]); |
246 |
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if ((m->type = o->otype) == MAT_MFUNC) |
247 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
248 |
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else |
249 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
250 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
251 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
252 |
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if (m->type == MAT_TFUNC) { |
253 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[4]); |
254 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[4]); |
255 |
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} |
256 |
|
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m->u.m.specexp = UNKSPECEXP; |
257 |
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} |
258 |
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|
259 |
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|
260 |
greg |
3.2 |
int |
261 |
gwlarson |
3.1 |
m_brdf2(o) /* convert advanced functional material */ |
262 |
|
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register OBJREC *o; |
263 |
|
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{ |
264 |
|
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register MATREC *m; |
265 |
|
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|
266 |
|
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if (o->oargs.nfargs < 9) |
267 |
|
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objerror(o, USER, "bad # of real arguments"); |
268 |
|
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m = newmaterial(o->oname); |
269 |
|
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m->type = o->otype; |
270 |
|
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/* assign average diffuse front+back */ |
271 |
|
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setcolor(m->u.m.ambdiff, (o->oargs.farg[0]+o->oargs.farg[3])*.5, |
272 |
|
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(o->oargs.farg[1]+o->oargs.farg[4])*.5, |
273 |
|
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(o->oargs.farg[2]+o->oargs.farg[5])*.5); |
274 |
|
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/* guess the rest */ |
275 |
|
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setcolor(m->u.m.specular, .1, .1, .1); |
276 |
|
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m->u.m.specexp = UNKSPECEXP; |
277 |
|
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} |
278 |
|
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|
279 |
|
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|
280 |
greg |
3.2 |
int |
281 |
gwlarson |
3.1 |
m_light(o) /* convert light type */ |
282 |
|
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register OBJREC *o; |
283 |
|
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{ |
284 |
|
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FVECT v; |
285 |
|
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register MATREC *m; |
286 |
|
|
|
287 |
|
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if (o->oargs.nfargs < (o->otype == MAT_SPOT ? 7 : 3)) |
288 |
|
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objerror(o, USER, "bad # of real arguments"); |
289 |
|
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m = newmaterial(o->oname); |
290 |
|
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setcolor(m->u.l.emission, o->oargs.farg[0], |
291 |
|
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o->oargs.farg[1], o->oargs.farg[2]); |
292 |
|
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if ((m->type = o->otype) == MAT_SPOT) { |
293 |
|
|
if ((m->u.l.spotang = o->oargs.farg[3]/2.) > 90.) |
294 |
|
|
m->u.l.spotang = 180.; |
295 |
|
|
v[0] = o->oargs.farg[4]; |
296 |
|
|
v[1] = o->oargs.farg[5]; |
297 |
|
|
v[2] = o->oargs.farg[6]; |
298 |
|
|
if (normalize(v) == 0.) |
299 |
|
|
objerror(o, USER, "illegal direction"); |
300 |
|
|
VCOPY(m->u.l.spotdir, v); |
301 |
|
|
} else { |
302 |
|
|
m->u.l.spotang = 180.; |
303 |
|
|
m->u.l.spotdir[0] = m->u.l.spotdir[1] = 0.; |
304 |
|
|
m->u.l.spotdir[2] = -1.; |
305 |
|
|
} |
306 |
|
|
} |
307 |
|
|
|
308 |
|
|
|
309 |
greg |
3.2 |
int |
310 |
gwlarson |
3.1 |
m_mirror(o) /* convert mirror type */ |
311 |
|
|
register OBJREC *o; |
312 |
|
|
{ |
313 |
|
|
register MATREC *m; |
314 |
|
|
|
315 |
|
|
if (o->oargs.nfargs != 3) |
316 |
|
|
objerror(o, USER, "bad # real arguments"); |
317 |
|
|
m = newmaterial(o->oname); |
318 |
|
|
m->type = o->otype; |
319 |
|
|
setcolor(m->u.m.ambdiff, 0., 0., 0.); |
320 |
|
|
setcolor(m->u.m.specular, o->oargs.farg[0], |
321 |
|
|
o->oargs.farg[1], o->oargs.farg[2]); |
322 |
|
|
m->u.m.specexp = MAXSPECEXP; |
323 |
|
|
} |
324 |
|
|
|
325 |
|
|
|
326 |
greg |
3.2 |
int |
327 |
gwlarson |
3.1 |
m_prism(o) /* convert prism type */ |
328 |
|
|
register OBJREC *o; |
329 |
|
|
{ |
330 |
|
|
register MATREC *m; |
331 |
|
|
/* can't really deal with this type */ |
332 |
|
|
m = newmaterial(o->oname); |
333 |
|
|
m->type = o->otype; |
334 |
|
|
setcolor(m->u.m.ambdiff, 0.2, 0.2, 0.2); |
335 |
|
|
setcolor(m->u.m.specular, 0.1, 0.1, 0.1); |
336 |
|
|
m->u.m.specexp = UNKSPECEXP; |
337 |
|
|
} |