1 |
greg |
2.1 |
/* Copyright (c) 1994 Regents of the University of California */ |
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3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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7 |
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/* |
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* Convert Radiance scene description to MGF |
9 |
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*/ |
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11 |
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#include <stdio.h> |
12 |
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#include <string.h> |
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#include "fvect.h" |
14 |
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#include "object.h" |
15 |
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#include "color.h" |
16 |
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#include "lookup.h" |
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18 |
greg |
2.7 |
#define PI 3.14159265358979323846 |
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20 |
greg |
2.1 |
int o_face(), o_cone(), o_sphere(), o_ring(), o_cylinder(); |
21 |
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int o_instance(), o_source(), o_illum(); |
22 |
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int o_plastic(), o_metal(), o_glass(), o_mirror(), o_trans(), o_light(); |
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24 |
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extern void free(); |
25 |
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extern char *malloc(); |
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27 |
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LUTAB rmats = LU_SINIT(free,NULL); /* defined material table */ |
28 |
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29 |
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LUTAB rdispatch = LU_SINIT(NULL,NULL); /* function dispatch table */ |
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31 |
greg |
2.2 |
char curmat[80]; /* current material */ |
32 |
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char curobj[128] = "Untitled"; /* current object name */ |
33 |
greg |
2.1 |
|
34 |
greg |
2.2 |
double unit_mult = 1.; /* units multiplier */ |
35 |
greg |
2.1 |
|
36 |
greg |
2.2 |
#define hasmult (unit_mult < .999 || unit_mult > 1.001) |
37 |
greg |
2.1 |
|
38 |
greg |
2.4 |
/* |
39 |
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* Stuff for tracking and reusing vertices: |
40 |
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*/ |
41 |
greg |
2.2 |
|
42 |
greg |
2.4 |
char VKFMT[] = "%+1.9e %+1.9e %+1.9e"; |
43 |
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#define VKLEN 64 |
44 |
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45 |
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#define mkvkey(k,v) sprintf(k, VKFMT, (v)[0], (v)[1], (v)[2]) |
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47 |
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#define NVERTS 256 |
48 |
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49 |
greg |
2.8 |
long vclock; /* incremented at each vertex request */ |
50 |
greg |
2.4 |
|
51 |
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struct vert { |
52 |
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long lused; /* when last used (0 if unassigned) */ |
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FVECT p; /* track point position only */ |
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} vert[NVERTS]; /* our vertex cache */ |
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56 |
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LUTAB vertab = LU_SINIT(free,NULL); /* our vertex lookup table */ |
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58 |
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59 |
greg |
2.1 |
main(argc, argv) |
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int argc; |
61 |
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char **argv; |
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{ |
63 |
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int i; |
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65 |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'd': /* units */ |
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switch (argv[i][2]) { |
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case 'm': /* meters */ |
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unit_mult = 1.; |
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break; |
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case 'c': /* centimeters */ |
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unit_mult = .01; |
74 |
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break; |
75 |
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case 'f': /* feet */ |
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unit_mult = 12.*.0254; |
77 |
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break; |
78 |
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case 'i': /* inches */ |
79 |
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unit_mult = .0254; |
80 |
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break; |
81 |
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default: |
82 |
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goto unkopt; |
83 |
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} |
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break; |
85 |
greg |
2.6 |
default: |
86 |
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goto unkopt; |
87 |
greg |
2.1 |
} |
88 |
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init(); |
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if (i >= argc) |
90 |
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rad2mgf(NULL); |
91 |
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else |
92 |
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for ( ; i < argc; i++) |
93 |
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rad2mgf(argv[i]); |
94 |
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uninit(); |
95 |
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exit(0); |
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unkopt: |
97 |
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fprintf(stderr, "Usage: %s [-d{m|c|f|i}] file ..\n", argv[0]); |
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exit(1); |
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} |
100 |
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101 |
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102 |
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rad2mgf(inp) /* convert a Radiance file to MGF */ |
103 |
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char *inp; |
104 |
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{ |
105 |
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#define mod buf |
106 |
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#define typ (buf+128) |
107 |
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#define id (buf+256) |
108 |
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#define alias (buf+384) |
109 |
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char buf[512]; |
110 |
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FUNARGS fa; |
111 |
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register FILE *fp; |
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register int c; |
113 |
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114 |
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if (inp == NULL) { |
115 |
greg |
2.2 |
inp = "standard input"; |
116 |
greg |
2.1 |
fp = stdin; |
117 |
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} else if (inp[0] == '!') { |
118 |
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if ((fp = popen(inp+1, "r")) == NULL) { |
119 |
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fputs(inp, stderr); |
120 |
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fputs(": cannot execute\n", stderr); |
121 |
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exit(1); |
122 |
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} |
123 |
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} else if ((fp = fopen(inp, "r")) == NULL) { |
124 |
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fputs(inp, stderr); |
125 |
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fputs(": cannot open\n", stderr); |
126 |
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exit(1); |
127 |
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} |
128 |
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printf("# Begin conversion from: %s\n", inp); |
129 |
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while ((c = getc(fp)) != EOF) |
130 |
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switch (c) { |
131 |
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case ' ': /* white space */ |
132 |
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case '\t': |
133 |
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case '\n': |
134 |
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case '\r': |
135 |
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case '\f': |
136 |
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break; |
137 |
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case '#': /* comment */ |
138 |
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if (fgets(buf, sizeof(buf), fp) != NULL) |
139 |
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printf("# %s", buf); |
140 |
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break; |
141 |
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case '!': /* inline command */ |
142 |
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ungetc(c, fp); |
143 |
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fgetline(buf, sizeof(buf), fp); |
144 |
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rad2mgf(buf); |
145 |
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break; |
146 |
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default: /* Radiance primitive */ |
147 |
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ungetc(c, fp); |
148 |
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if (fscanf(fp, "%s %s %s", mod, typ, id) != 3) { |
149 |
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fputs(inp, stderr); |
150 |
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fputs(": unexpected EOF\n", stderr); |
151 |
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exit(1); |
152 |
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} |
153 |
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if (!strcmp(typ, "alias")) { |
154 |
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strcpy(alias, "EOF"); |
155 |
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fscanf(fp, "%s", alias); |
156 |
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newmat(id, alias); |
157 |
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} else { |
158 |
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if (!readfargs(&fa, fp)) { |
159 |
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fprintf(stderr, |
160 |
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"%s: bad argument syntax for %s \"%s\"\n", |
161 |
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inp, typ, id); |
162 |
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exit(1); |
163 |
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} |
164 |
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cvtprim(inp, mod, typ, id, &fa); |
165 |
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freefargs(&fa); |
166 |
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} |
167 |
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break; |
168 |
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} |
169 |
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printf("# End conversion from: %s\n", inp); |
170 |
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if (inp[0] == '!') |
171 |
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pclose(fp); |
172 |
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else |
173 |
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fclose(fp); |
174 |
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#undef mod |
175 |
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#undef typ |
176 |
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#undef id |
177 |
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#undef alias |
178 |
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} |
179 |
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180 |
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181 |
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cvtprim(inp, mod, typ, id, fa) /* process Radiance primitive */ |
182 |
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char *inp, *mod, *typ, *id; |
183 |
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FUNARGS *fa; |
184 |
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{ |
185 |
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int (*df)(); |
186 |
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187 |
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df = (int (*)())lu_find(&rdispatch, typ)->data; |
188 |
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if (df != NULL) { /* convert */ |
189 |
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if ((*df)(mod, typ, id, fa) < 0) { |
190 |
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fprintf(stderr, "%s: bad %s \"%s\"\n", typ, id); |
191 |
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exit(1); |
192 |
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} |
193 |
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} else if (lu_find(&rmats, mod)->data != NULL) /* make alias */ |
194 |
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newmat(id, mod); |
195 |
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} |
196 |
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197 |
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198 |
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newmat(id, alias) /* add a modifier to the alias list */ |
199 |
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char *id; |
200 |
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char *alias; |
201 |
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{ |
202 |
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register LUENT *lp, *lpa; |
203 |
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204 |
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if (alias != NULL) { /* look up alias */ |
205 |
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if ((lpa = lu_find(&rmats, alias)) == NULL) |
206 |
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goto memerr; |
207 |
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if (lpa->data == NULL) |
208 |
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alias = NULL; /* doesn't exist! */ |
209 |
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} |
210 |
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if ((lp = lu_find(&rmats, id)) == NULL) /* look up material */ |
211 |
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goto memerr; |
212 |
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if (alias != NULL && lp->data == lpa->key) |
213 |
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return; /* alias set already */ |
214 |
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if (lp->data == NULL) { /* allocate material */ |
215 |
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if ((lp->key = (char *)malloc(strlen(id)+1)) == NULL) |
216 |
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goto memerr; |
217 |
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strcpy(lp->key, id); |
218 |
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} |
219 |
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if (alias == NULL) { /* set this material */ |
220 |
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lp->data = lp->key; |
221 |
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printf("m %s =\n", id); |
222 |
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} else { /* set this alias */ |
223 |
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lp->data = lpa->key; |
224 |
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printf("m %s = %s\n", id, alias); |
225 |
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} |
226 |
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strcpy(curmat, id); |
227 |
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return; |
228 |
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memerr: |
229 |
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fputs("Out of memory in newmat!\n", stderr); |
230 |
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exit(1); |
231 |
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} |
232 |
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233 |
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234 |
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setmat(id) /* set material to this one */ |
235 |
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char *id; |
236 |
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{ |
237 |
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if (!strcmp(id, curmat)) /* already set? */ |
238 |
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return; |
239 |
greg |
2.2 |
if (!strcmp(id, VOIDID)) /* cannot set */ |
240 |
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return; |
241 |
greg |
2.1 |
printf("m %s\n", id); |
242 |
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strcpy(curmat, id); |
243 |
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} |
244 |
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245 |
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246 |
greg |
2.2 |
setobj(id) /* set object name to this one */ |
247 |
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char *id; |
248 |
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{ |
249 |
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register char *cp, *cp2; |
250 |
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char *end = NULL; |
251 |
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int diff = 0; |
252 |
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/* use all but final suffix */ |
253 |
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for (cp = id; *cp; cp++) |
254 |
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if (*cp == '.') |
255 |
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end = cp; |
256 |
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if (end == NULL) |
257 |
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end = cp; |
258 |
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/* copy to current object */ |
259 |
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for (cp = id, cp2 = curobj; cp < end; *cp2++ = *cp++) |
260 |
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diff += *cp != *cp2; |
261 |
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if (!diff && !*cp2) |
262 |
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return; |
263 |
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*cp2 = '\0'; |
264 |
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fputs("o\no ", stdout); |
265 |
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puts(curobj); |
266 |
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} |
267 |
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268 |
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269 |
greg |
2.1 |
init() /* initialize dispatch table and output */ |
270 |
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{ |
271 |
greg |
2.4 |
lu_init(&vertab, NVERTS); |
272 |
greg |
2.1 |
lu_init(&rdispatch, 22); |
273 |
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add2dispatch("polygon", o_face); |
274 |
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add2dispatch("cone", o_cone); |
275 |
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add2dispatch("cup", o_cone); |
276 |
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add2dispatch("sphere", o_sphere); |
277 |
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add2dispatch("bubble", o_sphere); |
278 |
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add2dispatch("cylinder", o_cylinder); |
279 |
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add2dispatch("tube", o_cylinder); |
280 |
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add2dispatch("ring", o_ring); |
281 |
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add2dispatch("instance", o_instance); |
282 |
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add2dispatch("plastic", o_plastic); |
283 |
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add2dispatch("plastic2", o_plastic); |
284 |
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add2dispatch("metal", o_metal); |
285 |
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add2dispatch("metal2", o_metal); |
286 |
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add2dispatch("glass", o_glass); |
287 |
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add2dispatch("trans", o_trans); |
288 |
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add2dispatch("trans2", o_trans); |
289 |
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add2dispatch("mirror", o_mirror); |
290 |
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add2dispatch("light", o_light); |
291 |
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add2dispatch("spotlight", o_light); |
292 |
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add2dispatch("glow", o_light); |
293 |
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add2dispatch("illum", o_illum); |
294 |
|
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puts("# The following was converted from Radiance scene input"); |
295 |
greg |
2.2 |
if (hasmult) |
296 |
greg |
2.1 |
printf("xf -s %.4e\n", unit_mult); |
297 |
greg |
2.2 |
printf("o %s\n", curobj); |
298 |
greg |
2.1 |
} |
299 |
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300 |
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301 |
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uninit() /* mark end of MGF file */ |
302 |
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{ |
303 |
greg |
2.2 |
puts("o"); |
304 |
|
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if (hasmult) |
305 |
greg |
2.1 |
puts("xf"); |
306 |
|
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puts("# End of data converted from Radiance scene input"); |
307 |
|
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lu_done(&rdispatch); |
308 |
|
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lu_done(&rmats); |
309 |
greg |
2.4 |
lu_done(&vertab); |
310 |
greg |
2.1 |
} |
311 |
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312 |
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313 |
greg |
2.5 |
clrverts() /* clear vertex table */ |
314 |
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{ |
315 |
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register int i; |
316 |
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|
317 |
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lu_done(&vertab); |
318 |
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for (i = 0; i < NVERTS; i++) |
319 |
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vert[i].lused = 0; |
320 |
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lu_init(&vertab, NVERTS); |
321 |
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} |
322 |
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323 |
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324 |
greg |
2.1 |
add2dispatch(name, func) /* add function to dispatch table */ |
325 |
|
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char *name; |
326 |
|
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int (*func)(); |
327 |
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{ |
328 |
|
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register LUENT *lp; |
329 |
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330 |
|
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lp = lu_find(&rdispatch, name); |
331 |
|
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if (lp->key != NULL) { |
332 |
|
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fputs(name, stderr); |
333 |
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fputs(": duplicate dispatch entry!\n", stderr); |
334 |
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exit(1); |
335 |
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} |
336 |
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lp->key = name; |
337 |
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lp->data = (char *)func; |
338 |
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} |
339 |
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340 |
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|
341 |
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char * |
342 |
greg |
2.2 |
getvertid(vname, vp) /* get/set vertex ID for this point */ |
343 |
|
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char *vname; |
344 |
greg |
2.1 |
FVECT vp; |
345 |
|
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{ |
346 |
|
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char vkey[VKLEN]; |
347 |
|
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register LUENT *lp; |
348 |
|
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register int i, vndx; |
349 |
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|
350 |
greg |
2.8 |
vclock++; /* increment counter */ |
351 |
greg |
2.1 |
mkvkey(vkey, vp); |
352 |
|
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if ((lp = lu_find(&vertab, vkey)) == NULL) |
353 |
|
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goto memerr; |
354 |
|
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if (lp->data == NULL) { /* allocate new vertex entry */ |
355 |
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if (lp->key != NULL) /* reclaim deleted entry */ |
356 |
|
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vertab.ndel--; |
357 |
|
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else { |
358 |
|
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if ((lp->key = (char *)malloc(VKLEN)) == NULL) |
359 |
|
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goto memerr; |
360 |
|
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strcpy(lp->key, vkey); |
361 |
|
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} |
362 |
|
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vndx = 0; /* find oldest vertex */ |
363 |
|
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for (i = 1; i < NVERTS; i++) |
364 |
|
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if (vert[i].lused < vert[vndx].lused) |
365 |
|
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vndx = i; |
366 |
|
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if (vert[vndx].lused) { /* free old entry first */ |
367 |
|
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mkvkey(vkey, vert[vndx].p); |
368 |
|
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lu_delete(&vertab, vkey); |
369 |
|
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} |
370 |
greg |
2.3 |
VCOPY(vert[vndx].p, vp); /* assign it */ |
371 |
greg |
2.2 |
printf("v v%d =\n\tp %.15g %.15g %.15g\n", /* print it */ |
372 |
greg |
2.1 |
vndx, vp[0], vp[1], vp[2]); |
373 |
|
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lp->data = (char *)&vert[vndx]; /* set it */ |
374 |
|
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} else |
375 |
|
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vndx = (struct vert *)lp->data - vert; |
376 |
greg |
2.8 |
vert[vndx].lused = vclock; /* record this use */ |
377 |
greg |
2.1 |
sprintf(vname, "v%d", vndx); |
378 |
|
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return(vname); |
379 |
|
|
memerr: |
380 |
|
|
fputs("Out of memory in getvertid!\n", stderr); |
381 |
|
|
exit(1); |
382 |
|
|
} |
383 |
|
|
|
384 |
|
|
|
385 |
|
|
int |
386 |
|
|
o_face(mod, typ, id, fa) /* print out a polygon */ |
387 |
|
|
char *mod, *typ, *id; |
388 |
|
|
FUNARGS *fa; |
389 |
|
|
{ |
390 |
|
|
char entbuf[512]; |
391 |
greg |
2.2 |
register char *cp; |
392 |
greg |
2.1 |
register int i; |
393 |
|
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|
394 |
|
|
if (fa->nfargs < 9 | fa->nfargs % 3) |
395 |
|
|
return(-1); |
396 |
|
|
setmat(mod); |
397 |
greg |
2.2 |
setobj(id); |
398 |
|
|
cp = entbuf; |
399 |
|
|
*cp++ = 'f'; |
400 |
greg |
2.1 |
for (i = 0; i < fa->nfargs; i += 3) { |
401 |
greg |
2.2 |
*cp++ = ' '; |
402 |
|
|
getvertid(cp, fa->farg + i); |
403 |
|
|
while (*cp) |
404 |
|
|
cp++; |
405 |
greg |
2.1 |
} |
406 |
|
|
puts(entbuf); |
407 |
|
|
return(0); |
408 |
|
|
} |
409 |
|
|
|
410 |
|
|
|
411 |
|
|
int |
412 |
|
|
o_cone(mod, typ, id, fa) /* print out a cone */ |
413 |
|
|
char *mod, *typ, *id; |
414 |
|
|
register FUNARGS *fa; |
415 |
|
|
{ |
416 |
greg |
2.2 |
char v1[6], v2[6]; |
417 |
|
|
|
418 |
greg |
2.1 |
if (fa->nfargs != 8) |
419 |
|
|
return(-1); |
420 |
|
|
setmat(mod); |
421 |
greg |
2.2 |
setobj(id); |
422 |
|
|
getvertid(v1, fa->farg); |
423 |
|
|
getvertid(v2, fa->farg + 3); |
424 |
greg |
2.1 |
if (typ[1] == 'u') /* cup -> inverted cone */ |
425 |
greg |
2.2 |
printf("cone %s %.12g %s %.12g\n", |
426 |
|
|
v1, -fa->farg[6], v2, -fa->farg[7]); |
427 |
greg |
2.1 |
else |
428 |
greg |
2.2 |
printf("cone %s %.12g %s %.12g\n", |
429 |
|
|
v1, fa->farg[6], v2, fa->farg[7]); |
430 |
greg |
2.1 |
return(0); |
431 |
|
|
} |
432 |
|
|
|
433 |
|
|
|
434 |
|
|
int |
435 |
|
|
o_sphere(mod, typ, id, fa) /* print out a sphere */ |
436 |
|
|
char *mod, *typ, *id; |
437 |
|
|
register FUNARGS *fa; |
438 |
|
|
{ |
439 |
greg |
2.2 |
char cent[6]; |
440 |
|
|
|
441 |
greg |
2.1 |
if (fa->nfargs != 4) |
442 |
|
|
return(-1); |
443 |
|
|
setmat(mod); |
444 |
greg |
2.2 |
setobj(id); |
445 |
|
|
printf("sph %s %.12g\n", getvertid(cent, fa->farg), |
446 |
|
|
typ[0]=='b' ? -fa->farg[3] : fa->farg[3]); |
447 |
greg |
2.1 |
return(0); |
448 |
|
|
} |
449 |
|
|
|
450 |
|
|
|
451 |
|
|
int |
452 |
|
|
o_cylinder(mod, typ, id, fa) /* print out a cylinder */ |
453 |
|
|
char *mod, *typ, *id; |
454 |
|
|
register FUNARGS *fa; |
455 |
|
|
{ |
456 |
greg |
2.2 |
char v1[6], v2[6]; |
457 |
|
|
|
458 |
greg |
2.1 |
if (fa->nfargs != 7) |
459 |
|
|
return(-1); |
460 |
|
|
setmat(mod); |
461 |
greg |
2.2 |
setobj(id); |
462 |
|
|
getvertid(v1, fa->farg); |
463 |
|
|
getvertid(v2, fa->farg + 3); |
464 |
|
|
printf("cyl %s %.12g %s\n", v1, |
465 |
|
|
typ[0]=='t' ? -fa->farg[6] : fa->farg[6], v2); |
466 |
greg |
2.1 |
return(0); |
467 |
|
|
} |
468 |
|
|
|
469 |
|
|
|
470 |
|
|
int |
471 |
|
|
o_ring(mod, typ, id, fa) /* print out a ring */ |
472 |
|
|
char *mod, *typ, *id; |
473 |
|
|
register FUNARGS *fa; |
474 |
|
|
{ |
475 |
|
|
if (fa->nfargs != 8) |
476 |
|
|
return(-1); |
477 |
|
|
setmat(mod); |
478 |
greg |
2.2 |
setobj(id); |
479 |
|
|
printf("v cent =\n\tp %.12g %.12g %.12g\n", |
480 |
greg |
2.1 |
fa->farg[0], fa->farg[1], fa->farg[2]); |
481 |
greg |
2.2 |
printf("\tn %.12g %.12g %.12g\n", |
482 |
greg |
2.1 |
fa->farg[3], fa->farg[4], fa->farg[5]); |
483 |
|
|
if (fa->farg[6] < fa->farg[7]) |
484 |
|
|
printf("ring cent %.12g %.12g\n", |
485 |
|
|
fa->farg[6], fa->farg[7]); |
486 |
|
|
else |
487 |
|
|
printf("ring cent %.12g %.12g\n", |
488 |
|
|
fa->farg[7], fa->farg[6]); |
489 |
|
|
return(0); |
490 |
|
|
} |
491 |
|
|
|
492 |
|
|
|
493 |
|
|
int |
494 |
|
|
o_instance(mod, typ, id, fa) /* convert an instance */ |
495 |
|
|
char *mod, *typ, *id; |
496 |
|
|
FUNARGS *fa; |
497 |
|
|
{ |
498 |
greg |
2.2 |
register int i; |
499 |
|
|
register char *cp; |
500 |
|
|
char *start = NULL, *end = NULL; |
501 |
|
|
/* |
502 |
|
|
* We don't really know how to do this, so we just create |
503 |
|
|
* a reference to an undefined MGF file and it's the user's |
504 |
|
|
* responsibility to create this file and put the appropriate |
505 |
|
|
* stuff into it. |
506 |
|
|
*/ |
507 |
|
|
if (fa->nsargs < 1) |
508 |
|
|
return(-1); |
509 |
|
|
setmat(mod); /* only works if surfaces are void */ |
510 |
|
|
setobj(id); |
511 |
|
|
for (cp = fa->sarg[0]; *cp; cp++) /* construct MGF file name */ |
512 |
|
|
if (*cp == '/') |
513 |
|
|
start = cp+1; |
514 |
|
|
else if (*cp == '.') |
515 |
|
|
end = cp; |
516 |
|
|
if (start == NULL) |
517 |
|
|
start = fa->sarg[0]; |
518 |
|
|
if (end == NULL || start >= end) |
519 |
|
|
end = cp; |
520 |
|
|
fputs("i ", stdout); /* print include entity */ |
521 |
|
|
for (cp = start; cp < end; cp++) |
522 |
|
|
putchar(*cp); |
523 |
|
|
fputs(".mgf", stdout); /* add MGF suffix */ |
524 |
|
|
for (i = 1; i < fa->nsargs; i++) { /* add transform */ |
525 |
|
|
putchar(' '); |
526 |
|
|
fputs(fa->sarg[i], stdout); |
527 |
|
|
} |
528 |
|
|
putchar('\n'); |
529 |
greg |
2.5 |
clrverts(); /* vertex id's no longer reliable */ |
530 |
greg |
2.2 |
return(0); |
531 |
greg |
2.1 |
} |
532 |
|
|
|
533 |
|
|
|
534 |
|
|
int |
535 |
|
|
o_source(mod, typ, id, fa) /* convert a source */ |
536 |
|
|
char *mod, *typ, *id; |
537 |
|
|
FUNARGS *fa; |
538 |
|
|
{ |
539 |
|
|
return(0); /* there is no MGF equivalent! */ |
540 |
|
|
} |
541 |
|
|
|
542 |
|
|
|
543 |
|
|
int |
544 |
|
|
o_illum(mod, typ, id, fa) /* convert an illum material */ |
545 |
|
|
char *mod, *typ, *id; |
546 |
|
|
FUNARGS *fa; |
547 |
|
|
{ |
548 |
|
|
if (fa->nsargs == 1 && strcmp(fa->sarg[0], VOIDID)) { |
549 |
|
|
newmat(id, fa->sarg[0]); /* just create alias */ |
550 |
|
|
return(0); |
551 |
|
|
} |
552 |
|
|
/* else create invisible material */ |
553 |
|
|
newmat(id, NULL); |
554 |
greg |
2.2 |
puts("\tts 1 0"); |
555 |
greg |
2.1 |
return(0); |
556 |
|
|
} |
557 |
|
|
|
558 |
|
|
|
559 |
|
|
int |
560 |
|
|
o_plastic(mod, typ, id, fa) /* convert a plastic material */ |
561 |
|
|
char *mod, *typ, *id; |
562 |
|
|
register FUNARGS *fa; |
563 |
|
|
{ |
564 |
|
|
COLOR cxyz, rrgb; |
565 |
|
|
double d; |
566 |
|
|
|
567 |
|
|
if (fa->nfargs != (typ[7]=='2' ? 6 : 5)) |
568 |
|
|
return(-1); |
569 |
|
|
newmat(id, NULL); |
570 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
571 |
|
|
rgb_cie(cxyz, rrgb); |
572 |
greg |
2.2 |
puts("\tc"); /* put diffuse component */ |
573 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
574 |
|
|
if (d > FTINY) |
575 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
576 |
|
|
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
577 |
|
|
if (fa->farg[3] > FTINY) { /* put specular component */ |
578 |
|
|
puts("\tc"); |
579 |
|
|
printf("\trs %.4f %.4f\n", fa->farg[3], |
580 |
|
|
typ[7]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
581 |
|
|
fa->farg[4]); |
582 |
|
|
} |
583 |
greg |
2.1 |
return(0); |
584 |
|
|
} |
585 |
|
|
|
586 |
|
|
|
587 |
|
|
int |
588 |
|
|
o_metal(mod, typ, id, fa) /* convert a metal material */ |
589 |
|
|
char *mod, *typ, *id; |
590 |
|
|
register FUNARGS *fa; |
591 |
|
|
{ |
592 |
|
|
COLOR cxyz, rrgb; |
593 |
|
|
double d; |
594 |
|
|
|
595 |
|
|
if (fa->nfargs != (typ[5]=='2' ? 6 : 5)) |
596 |
|
|
return(-1); |
597 |
|
|
newmat(id, NULL); |
598 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
599 |
|
|
rgb_cie(cxyz, rrgb); |
600 |
greg |
2.2 |
puts("\tc"); /* put diffuse component */ |
601 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
602 |
|
|
if (d > FTINY) |
603 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
604 |
|
|
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
605 |
greg |
2.1 |
/* put specular component */ |
606 |
greg |
2.2 |
printf("\trs %.4f %.4f\n", cxyz[1]*fa->farg[3], |
607 |
greg |
2.1 |
typ[5]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
608 |
|
|
fa->farg[4]); |
609 |
|
|
return(0); |
610 |
|
|
} |
611 |
|
|
|
612 |
|
|
|
613 |
|
|
int |
614 |
|
|
o_glass(mod, typ, id, fa) /* convert a glass material */ |
615 |
|
|
char *mod, *typ, *id; |
616 |
|
|
register FUNARGS *fa; |
617 |
|
|
{ |
618 |
|
|
COLOR cxyz, rrgb, trgb; |
619 |
|
|
double nrfr = 1.52, F, d; |
620 |
|
|
register int i; |
621 |
|
|
|
622 |
|
|
if (fa->nfargs != 3 && fa->nfargs != 4) |
623 |
|
|
return(-1); |
624 |
|
|
newmat(id, NULL); |
625 |
|
|
if (fa->nfargs == 4) |
626 |
|
|
nrfr = fa->farg[3]; |
627 |
|
|
F = (1. - nrfr)/(1. + nrfr); /* use normal incidence */ |
628 |
|
|
F *= F; |
629 |
|
|
for (i = 0; i < 3; i++) { |
630 |
greg |
2.2 |
trgb[i] = fa->farg[i] * (1. - F)*(1. - F) / |
631 |
greg |
2.1 |
(1. - F*F*fa->farg[i]*fa->farg[i]); |
632 |
greg |
2.2 |
rrgb[i] = F * (1. + (1. - 2.*F)*fa->farg[i]) / |
633 |
|
|
(1. - F*F*fa->farg[i]*fa->farg[i]); |
634 |
greg |
2.1 |
} |
635 |
|
|
rgb_cie(cxyz, rrgb); /* put reflected component */ |
636 |
greg |
2.2 |
puts("\tc"); |
637 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
638 |
|
|
if (d > FTINY) |
639 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
640 |
|
|
printf("\trs %.4f 0\n", cxyz[1]); |
641 |
greg |
2.1 |
rgb_cie(cxyz, trgb); /* put transmitted component */ |
642 |
greg |
2.2 |
puts("\tc"); |
643 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
644 |
|
|
if (d > FTINY) |
645 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
646 |
|
|
printf("\tts %.4f 0\n", cxyz[1]); |
647 |
greg |
2.1 |
return(0); |
648 |
|
|
} |
649 |
|
|
|
650 |
|
|
|
651 |
|
|
int |
652 |
|
|
o_mirror(mod, typ, id, fa) /* convert a mirror material */ |
653 |
|
|
char *mod, *typ, *id; |
654 |
|
|
register FUNARGS *fa; |
655 |
|
|
{ |
656 |
|
|
COLOR cxyz, rrgb; |
657 |
|
|
double d; |
658 |
|
|
|
659 |
|
|
if (fa->nsargs == 1) { /* use alternate material */ |
660 |
|
|
newmat(id, fa->sarg[0]); |
661 |
|
|
return(0); |
662 |
|
|
} |
663 |
|
|
if (fa->nfargs != 3) |
664 |
|
|
return(-1); |
665 |
|
|
newmat(id, NULL); |
666 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
667 |
|
|
rgb_cie(cxyz, rrgb); |
668 |
greg |
2.2 |
puts("\tc"); /* put specular component */ |
669 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
670 |
|
|
if (d > FTINY) |
671 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
672 |
|
|
printf("\trs %.4f 0\n", cxyz[1]); |
673 |
greg |
2.1 |
return(0); |
674 |
|
|
} |
675 |
|
|
|
676 |
|
|
|
677 |
|
|
int |
678 |
|
|
o_trans(mod, typ, id, fa) /* convert a trans material */ |
679 |
|
|
char *mod, *typ, *id; |
680 |
|
|
register FUNARGS *fa; |
681 |
|
|
{ |
682 |
|
|
COLOR cxyz, rrgb; |
683 |
|
|
double rough, trans, tspec, d; |
684 |
|
|
|
685 |
|
|
if (typ[4] == '2') { /* trans2 */ |
686 |
|
|
if (fa->nfargs != 8) |
687 |
|
|
return(-1); |
688 |
|
|
rough = .5*(fa->farg[4] + fa->farg[5]); |
689 |
|
|
trans = fa->farg[6]; |
690 |
|
|
tspec = fa->farg[7]; |
691 |
|
|
} else { /* trans */ |
692 |
|
|
if (fa->nfargs != 7) |
693 |
|
|
return(-1); |
694 |
|
|
rough = fa->farg[4]; |
695 |
|
|
trans = fa->farg[5]; |
696 |
|
|
tspec = fa->farg[6]; |
697 |
|
|
} |
698 |
|
|
newmat(id, NULL); |
699 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
700 |
|
|
rgb_cie(cxyz, rrgb); |
701 |
greg |
2.2 |
puts("\tc"); /* put transmitted diffuse */ |
702 |
greg |
2.1 |
d = cxyz[0] + cxyz[1] + cxyz[2]; |
703 |
|
|
if (d > FTINY) |
704 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
705 |
|
|
printf("\ttd %.4f\n", cxyz[1]*trans*(1. - fa->farg[3])*(1. - tspec)); |
706 |
greg |
2.1 |
/* put transmitted specular */ |
707 |
greg |
2.2 |
printf("\tts %.4f %.4f\n", cxyz[1]*trans*tspec*(1. - fa->farg[3]), rough); |
708 |
greg |
2.1 |
/* put reflected diffuse */ |
709 |
greg |
2.2 |
printf("\trd %.4f\n", cxyz[1]*(1. - fa->farg[3])*(1. - trans)); |
710 |
|
|
puts("\tc"); /* put reflected specular */ |
711 |
|
|
printf("\trs %.4f %.4f\n", fa->farg[3], rough); |
712 |
greg |
2.1 |
return(0); |
713 |
|
|
} |
714 |
|
|
|
715 |
|
|
|
716 |
|
|
int |
717 |
|
|
o_light(mod, typ, id, fa) /* convert a light type */ |
718 |
|
|
char *mod, *typ, *id; |
719 |
|
|
register FUNARGS *fa; |
720 |
|
|
{ |
721 |
|
|
COLOR cxyz, rrgb; |
722 |
|
|
double d; |
723 |
|
|
|
724 |
|
|
if (fa->nfargs < 3) |
725 |
|
|
return(-1); |
726 |
|
|
newmat(id, NULL); |
727 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
728 |
|
|
rgb_cie(cxyz, rrgb); |
729 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
730 |
greg |
2.2 |
puts("\tc"); |
731 |
greg |
2.1 |
if (d > FTINY) |
732 |
greg |
2.2 |
printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
733 |
greg |
2.7 |
printf("\ted %.4g\n", cxyz[1]*(PI*WHTEFFICACY)); |
734 |
greg |
2.1 |
return(0); |
735 |
|
|
} |