| 1 |
gwlarson |
3.1 |
#ifndef lint |
| 2 |
greg |
3.5 |
static const char RCSid[] = "$Id: rglmat.c,v 3.4 2003/04/23 02:28:06 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 |
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| 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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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) |
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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); |
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gwlarson |
3.1 |
if ((lup->data = o->os) != NULL) /* make material reference */ |
| 59 |
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((MATREC *)lup->data)->nlinks++; |
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greg |
3.4 |
return(0); |
| 61 |
gwlarson |
3.1 |
memerr: |
| 62 |
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error(SYSTEM, "out of memory in o_default"); |
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greg |
3.4 |
return(0); |
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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 |
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} |
| 99 |
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| 100 |
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| 101 |
greg |
3.2 |
void |
| 102 |
greg |
3.5 |
freemtl(p) /* free a material */ |
| 103 |
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void *p; |
| 104 |
gwlarson |
3.1 |
{ |
| 105 |
greg |
3.5 |
register MATREC *mp = (MATREC *)p; |
| 106 |
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| 107 |
gwlarson |
3.1 |
if (!--mp->nlinks) |
| 108 |
greg |
3.2 |
free((void *)mp); |
| 109 |
gwlarson |
3.1 |
} |
| 110 |
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| 111 |
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| 112 |
greg |
3.2 |
int |
| 113 |
gwlarson |
3.1 |
m_normal(o) /* compute normal material parameters */ |
| 114 |
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register OBJREC *o; |
| 115 |
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{ |
| 116 |
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register MATREC *m; |
| 117 |
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/* check arguments */ |
| 118 |
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if (o->oargs.nfargs != (o->otype == MAT_TRANS ? 7 : 5)) |
| 119 |
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objerror(o, USER, "bad # of real arguments"); |
| 120 |
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/* allocate/insert material */ |
| 121 |
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m = newmaterial(o->oname); |
| 122 |
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/* assign parameters */ |
| 123 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
| 124 |
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o->oargs.farg[1], o->oargs.farg[2]); |
| 125 |
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if ((m->type = o->otype) == MAT_METAL) |
| 126 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
| 127 |
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else |
| 128 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
| 129 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
| 130 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
| 131 |
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if (m->type == MAT_TRANS) { |
| 132 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[5]); |
| 133 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[5]); |
| 134 |
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} |
| 135 |
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if (o->oargs.farg[4] <= FTINY) |
| 136 |
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m->u.m.specexp = MAXSPECEXP; |
| 137 |
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else |
| 138 |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[4]); |
| 139 |
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if (m->u.m.specexp > MAXSPECEXP) |
| 140 |
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m->u.m.specexp = MAXSPECEXP; |
| 141 |
greg |
3.4 |
return(0); |
| 142 |
gwlarson |
3.1 |
} |
| 143 |
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| 144 |
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| 145 |
greg |
3.2 |
int |
| 146 |
gwlarson |
3.1 |
m_aniso(o) /* anisotropic material */ |
| 147 |
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register OBJREC *o; |
| 148 |
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{ |
| 149 |
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register MATREC *m; |
| 150 |
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/* check arguments */ |
| 151 |
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if (o->oargs.nfargs < (o->otype == MAT_TRANS2 ? 8 : 6)) |
| 152 |
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objerror(o, USER, "bad # of real arguments"); |
| 153 |
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/* allocate/insert material */ |
| 154 |
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m = newmaterial(o->oname); |
| 155 |
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/* assign parameters */ |
| 156 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
| 157 |
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o->oargs.farg[1], o->oargs.farg[2]); |
| 158 |
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if ((m->type = o->otype) == MAT_METAL2) |
| 159 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
| 160 |
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else |
| 161 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
| 162 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
| 163 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
| 164 |
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if (m->type == MAT_TRANS2) { |
| 165 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[6]); |
| 166 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[6]); |
| 167 |
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} |
| 168 |
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if (o->oargs.farg[4]*o->oargs.farg[5] <= FTINY*FTINY) |
| 169 |
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m->u.m.specexp = MAXSPECEXP; |
| 170 |
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else |
| 171 |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[5]); |
| 172 |
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if (m->u.m.specexp > MAXSPECEXP) |
| 173 |
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m->u.m.specexp = MAXSPECEXP; |
| 174 |
greg |
3.4 |
return(0); |
| 175 |
gwlarson |
3.1 |
} |
| 176 |
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| 177 |
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| 178 |
greg |
3.2 |
int |
| 179 |
gwlarson |
3.1 |
m_glass(o) /* glass material (hopeless) */ |
| 180 |
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OBJREC *o; |
| 181 |
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{ |
| 182 |
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register MATREC *m; |
| 183 |
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| 184 |
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m = newmaterial(o->oname); |
| 185 |
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m->type = o->otype; |
| 186 |
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setcolor(m->u.m.ambdiff, 0., 0., 0.); |
| 187 |
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setcolor(m->u.m.specular, .08, .08, .08); |
| 188 |
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m->u.m.specexp = MAXSPECEXP; |
| 189 |
greg |
3.4 |
return(0); |
| 190 |
gwlarson |
3.1 |
} |
| 191 |
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| 192 |
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| 193 |
greg |
3.2 |
int |
| 194 |
gwlarson |
3.1 |
m_brdf(o) /* convert functional material */ |
| 195 |
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register OBJREC *o; |
| 196 |
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{ |
| 197 |
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register MATREC *m; |
| 198 |
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/* check arguments */ |
| 199 |
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if (o->oargs.nfargs < (o->otype == MAT_TFUNC ? 6 : 4)) |
| 200 |
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objerror(o, USER, "bad # of real arguments"); |
| 201 |
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/* allocate/insert material */ |
| 202 |
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m = newmaterial(o->oname); |
| 203 |
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/* assign parameters */ |
| 204 |
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setcolor(m->u.m.ambdiff, o->oargs.farg[0], |
| 205 |
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o->oargs.farg[1], o->oargs.farg[2]); |
| 206 |
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if ((m->type = o->otype) == MAT_MFUNC) |
| 207 |
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copycolor(m->u.m.specular, m->u.m.ambdiff); |
| 208 |
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else |
| 209 |
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setcolor(m->u.m.specular, 1., 1., 1.); |
| 210 |
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scalecolor(m->u.m.specular, o->oargs.farg[3]); |
| 211 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[3]); |
| 212 |
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if (m->type == MAT_TFUNC) { |
| 213 |
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scalecolor(m->u.m.specular, 1.-o->oargs.farg[4]); |
| 214 |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[4]); |
| 215 |
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} |
| 216 |
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m->u.m.specexp = UNKSPECEXP; |
| 217 |
greg |
3.4 |
return(0); |
| 218 |
gwlarson |
3.1 |
} |
| 219 |
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| 220 |
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| 221 |
greg |
3.2 |
int |
| 222 |
gwlarson |
3.1 |
m_brdf2(o) /* convert advanced functional material */ |
| 223 |
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register OBJREC *o; |
| 224 |
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{ |
| 225 |
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register MATREC *m; |
| 226 |
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| 227 |
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if (o->oargs.nfargs < 9) |
| 228 |
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objerror(o, USER, "bad # of real arguments"); |
| 229 |
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m = newmaterial(o->oname); |
| 230 |
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m->type = o->otype; |
| 231 |
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/* assign average diffuse front+back */ |
| 232 |
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setcolor(m->u.m.ambdiff, (o->oargs.farg[0]+o->oargs.farg[3])*.5, |
| 233 |
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(o->oargs.farg[1]+o->oargs.farg[4])*.5, |
| 234 |
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(o->oargs.farg[2]+o->oargs.farg[5])*.5); |
| 235 |
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/* guess the rest */ |
| 236 |
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setcolor(m->u.m.specular, .1, .1, .1); |
| 237 |
|
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m->u.m.specexp = UNKSPECEXP; |
| 238 |
greg |
3.4 |
return(0); |
| 239 |
gwlarson |
3.1 |
} |
| 240 |
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| 241 |
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| 242 |
greg |
3.2 |
int |
| 243 |
gwlarson |
3.1 |
m_light(o) /* convert light type */ |
| 244 |
|
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register OBJREC *o; |
| 245 |
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{ |
| 246 |
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FVECT v; |
| 247 |
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register MATREC *m; |
| 248 |
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| 249 |
|
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if (o->oargs.nfargs < (o->otype == MAT_SPOT ? 7 : 3)) |
| 250 |
|
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objerror(o, USER, "bad # of real arguments"); |
| 251 |
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m = newmaterial(o->oname); |
| 252 |
|
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setcolor(m->u.l.emission, o->oargs.farg[0], |
| 253 |
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o->oargs.farg[1], o->oargs.farg[2]); |
| 254 |
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if ((m->type = o->otype) == MAT_SPOT) { |
| 255 |
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if ((m->u.l.spotang = o->oargs.farg[3]/2.) > 90.) |
| 256 |
|
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m->u.l.spotang = 180.; |
| 257 |
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v[0] = o->oargs.farg[4]; |
| 258 |
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v[1] = o->oargs.farg[5]; |
| 259 |
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v[2] = o->oargs.farg[6]; |
| 260 |
|
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if (normalize(v) == 0.) |
| 261 |
|
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objerror(o, USER, "illegal direction"); |
| 262 |
|
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VCOPY(m->u.l.spotdir, v); |
| 263 |
|
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} else { |
| 264 |
|
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m->u.l.spotang = 180.; |
| 265 |
|
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m->u.l.spotdir[0] = m->u.l.spotdir[1] = 0.; |
| 266 |
|
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m->u.l.spotdir[2] = -1.; |
| 267 |
|
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} |
| 268 |
greg |
3.4 |
return(0); |
| 269 |
gwlarson |
3.1 |
} |
| 270 |
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| 271 |
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| 272 |
greg |
3.2 |
int |
| 273 |
gwlarson |
3.1 |
m_mirror(o) /* convert mirror type */ |
| 274 |
|
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register OBJREC *o; |
| 275 |
|
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{ |
| 276 |
|
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register MATREC *m; |
| 277 |
|
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|
| 278 |
|
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if (o->oargs.nfargs != 3) |
| 279 |
|
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objerror(o, USER, "bad # real arguments"); |
| 280 |
|
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m = newmaterial(o->oname); |
| 281 |
|
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m->type = o->otype; |
| 282 |
|
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setcolor(m->u.m.ambdiff, 0., 0., 0.); |
| 283 |
|
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setcolor(m->u.m.specular, o->oargs.farg[0], |
| 284 |
|
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o->oargs.farg[1], o->oargs.farg[2]); |
| 285 |
|
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m->u.m.specexp = MAXSPECEXP; |
| 286 |
greg |
3.4 |
return(0); |
| 287 |
gwlarson |
3.1 |
} |
| 288 |
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| 289 |
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| 290 |
greg |
3.2 |
int |
| 291 |
gwlarson |
3.1 |
m_prism(o) /* convert prism type */ |
| 292 |
|
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register OBJREC *o; |
| 293 |
|
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{ |
| 294 |
|
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register MATREC *m; |
| 295 |
|
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/* can't really deal with this type */ |
| 296 |
|
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m = newmaterial(o->oname); |
| 297 |
|
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m->type = o->otype; |
| 298 |
|
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setcolor(m->u.m.ambdiff, 0.2, 0.2, 0.2); |
| 299 |
|
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setcolor(m->u.m.specular, 0.1, 0.1, 0.1); |
| 300 |
|
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m->u.m.specexp = UNKSPECEXP; |
| 301 |
greg |
3.4 |
return(0); |
| 302 |
gwlarson |
3.1 |
} |
