1 |
greg |
2.1 |
/* Copyright (c) 1994 Regents of the University of California */ |
2 |
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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 |
6 |
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7 |
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/* |
8 |
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* Convert MGF (Materials and Geometry Format) to Radiance |
9 |
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*/ |
10 |
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11 |
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#include <stdio.h> |
12 |
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#include <math.h> |
13 |
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#include <string.h> |
14 |
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#include "mgflib/parser.h" |
15 |
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#include "color.h" |
16 |
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#include "tmesh.h" |
17 |
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18 |
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#define putv(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
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20 |
greg |
2.9 |
#define invert (xf_context != NULL && xf_context->rev) |
21 |
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22 |
greg |
2.2 |
double glowdist = FHUGE; /* glow test distance */ |
23 |
greg |
2.1 |
|
24 |
greg |
2.8 |
double emult = 1.; /* emitter multiplier */ |
25 |
greg |
2.1 |
|
26 |
greg |
2.11 |
FILE *matfp = stdout; /* material output file */ |
27 |
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28 |
greg |
2.1 |
int r_comment(), r_cone(), r_cyl(), r_face(), r_ies(), r_ring(), r_sph(); |
29 |
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char *material(), *object(), *addarg(); |
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31 |
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32 |
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main(argc, argv) /* convert files to stdout */ |
33 |
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int argc; |
34 |
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char *argv[]; |
35 |
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{ |
36 |
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int i, rv; |
37 |
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/* initialize dispatch table */ |
38 |
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mg_ehand[MG_E_COMMENT] = r_comment; |
39 |
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mg_ehand[MG_E_COLOR] = c_hcolor; |
40 |
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mg_ehand[MG_E_CONE] = r_cone; |
41 |
greg |
2.4 |
mg_ehand[MG_E_CMIX] = c_hcolor; |
42 |
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mg_ehand[MG_E_CSPEC] = c_hcolor; |
43 |
greg |
2.1 |
mg_ehand[MG_E_CXY] = c_hcolor; |
44 |
greg |
2.13 |
mg_ehand[MG_E_CCT] = c_hcolor; |
45 |
greg |
2.1 |
mg_ehand[MG_E_CYL] = r_cyl; |
46 |
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mg_ehand[MG_E_ED] = c_hmaterial; |
47 |
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mg_ehand[MG_E_FACE] = r_face; |
48 |
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mg_ehand[MG_E_IES] = r_ies; |
49 |
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mg_ehand[MG_E_MATERIAL] = c_hmaterial; |
50 |
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mg_ehand[MG_E_NORMAL] = c_hvertex; |
51 |
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mg_ehand[MG_E_OBJECT] = obj_handler; |
52 |
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mg_ehand[MG_E_POINT] = c_hvertex; |
53 |
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mg_ehand[MG_E_RD] = c_hmaterial; |
54 |
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mg_ehand[MG_E_RING] = r_ring; |
55 |
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mg_ehand[MG_E_RS] = c_hmaterial; |
56 |
greg |
2.6 |
mg_ehand[MG_E_SIDES] = c_hmaterial; |
57 |
greg |
2.1 |
mg_ehand[MG_E_SPH] = r_sph; |
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mg_ehand[MG_E_TD] = c_hmaterial; |
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mg_ehand[MG_E_TS] = c_hmaterial; |
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mg_ehand[MG_E_VERTEX] = c_hvertex; |
61 |
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mg_ehand[MG_E_XF] = xf_handler; |
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mg_init(); /* initialize the parser */ |
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/* get options & print header */ |
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printf("## %s", argv[0]); |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
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printf(" %s", argv[i]); |
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switch (argv[i][1]) { |
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case 'g': /* glow distance (meters) */ |
69 |
greg |
2.10 |
if (argv[i][2] || badarg(argc-i-1, argv+i+1, "f")) |
70 |
greg |
2.1 |
goto userr; |
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glowdist = atof(argv[++i]); |
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printf(" %s", argv[i]); |
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break; |
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case 'e': /* emitter multiplier */ |
75 |
greg |
2.10 |
if (argv[i][2] || badarg(argc-i-1, argv+i+1, "f")) |
76 |
greg |
2.1 |
goto userr; |
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emult = atof(argv[++i]); |
78 |
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printf(" %s", argv[i]); |
79 |
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break; |
80 |
greg |
2.11 |
case 'm': /* materials file */ |
81 |
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matfp = fopen(argv[++i], "a"); |
82 |
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if (matfp == NULL) { |
83 |
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fprintf(stderr, "%s: cannot append\n", argv[i]); |
84 |
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exit(1); |
85 |
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} |
86 |
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printf(" %s", argv[i]); |
87 |
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break; |
88 |
greg |
2.1 |
default: |
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goto userr; |
90 |
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} |
91 |
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} |
92 |
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putchar('\n'); |
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if (i == argc) { /* convert stdin */ |
94 |
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if ((rv = mg_load(NULL)) != MG_OK) |
95 |
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exit(1); |
96 |
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} else /* convert each file */ |
97 |
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for ( ; i < argc; i++) { |
98 |
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printf("## %s %s ##############################\n", |
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argv[0], argv[i]); |
100 |
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if ((rv = mg_load(argv[i])) != MG_OK) |
101 |
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exit(1); |
102 |
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} |
103 |
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exit(0); |
104 |
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userr: |
105 |
greg |
2.11 |
fprintf(stderr, "Usage: %s [-g dist][-e mult][-m matf] [file.mgf] ..\n", |
106 |
greg |
2.1 |
argv[0]); |
107 |
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exit(1); |
108 |
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} |
109 |
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110 |
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111 |
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int |
112 |
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r_comment(ac, av) /* repeat a comment verbatim */ |
113 |
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register int ac; |
114 |
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register char **av; |
115 |
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{ |
116 |
greg |
2.7 |
putchar('#'); /* use Radiance comment character */ |
117 |
greg |
2.1 |
while (--ac) { |
118 |
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putchar(' '); |
119 |
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fputs(*++av, stdout); |
120 |
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} |
121 |
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putchar('\n'); |
122 |
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return(MG_OK); |
123 |
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} |
124 |
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125 |
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126 |
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int |
127 |
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r_cone(ac, av) /* put out a cone */ |
128 |
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int ac; |
129 |
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char **av; |
130 |
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{ |
131 |
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static int ncones; |
132 |
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char *mat; |
133 |
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double r1, r2; |
134 |
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C_VERTEX *cv1, *cv2; |
135 |
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FVECT p1, p2; |
136 |
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int inv; |
137 |
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138 |
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if (ac != 5) |
139 |
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return(MG_EARGC); |
140 |
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if (!isflt(av[2]) || !isflt(av[4])) |
141 |
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return(MG_ETYPE); |
142 |
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if ((cv1 = c_getvert(av[1])) == NULL || |
143 |
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(cv2 = c_getvert(av[3])) == NULL) |
144 |
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return(MG_EUNDEF); |
145 |
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xf_xfmpoint(p1, cv1->p); |
146 |
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xf_xfmpoint(p2, cv2->p); |
147 |
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r1 = xf_scale(atof(av[2])); |
148 |
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r2 = xf_scale(atof(av[4])); |
149 |
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inv = r1 < 0.; |
150 |
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if (r1 == 0.) { |
151 |
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if (r2 == 0.) |
152 |
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return(MG_EILL); |
153 |
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inv = r2 < 0.; |
154 |
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} else if (r2 != 0. && inv ^ r2 < 0.) |
155 |
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return(MG_EILL); |
156 |
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if (inv) { |
157 |
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r1 = -r1; |
158 |
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r2 = -r2; |
159 |
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} |
160 |
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if ((mat = material()) == NULL) |
161 |
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return(MG_EBADMAT); |
162 |
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printf("\n%s %s %sc%d\n", mat, inv ? "cup" : "cone", |
163 |
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object(), ++ncones); |
164 |
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printf("0\n0\n8\n"); |
165 |
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putv(p1); |
166 |
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putv(p2); |
167 |
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printf("%18.12g %18.12g\n", r1, r2); |
168 |
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return(MG_OK); |
169 |
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} |
170 |
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171 |
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172 |
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int |
173 |
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r_cyl(ac, av) /* put out a cylinder */ |
174 |
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int ac; |
175 |
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char **av; |
176 |
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{ |
177 |
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static int ncyls; |
178 |
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char *mat; |
179 |
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double rad; |
180 |
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C_VERTEX *cv1, *cv2; |
181 |
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FVECT p1, p2; |
182 |
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int inv; |
183 |
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184 |
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if (ac != 4) |
185 |
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return(MG_EARGC); |
186 |
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if (!isflt(av[2])) |
187 |
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return(MG_ETYPE); |
188 |
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if ((cv1 = c_getvert(av[1])) == NULL || |
189 |
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(cv2 = c_getvert(av[3])) == NULL) |
190 |
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return(MG_EUNDEF); |
191 |
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xf_xfmpoint(p1, cv1->p); |
192 |
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xf_xfmpoint(p2, cv2->p); |
193 |
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rad = xf_scale(atof(av[2])); |
194 |
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if ((inv = rad < 0.)) |
195 |
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rad = -rad; |
196 |
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if ((mat = material()) == NULL) |
197 |
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return(MG_EBADMAT); |
198 |
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printf("\n%s %s %scy%d\n", mat, inv ? "tube" : "cylinder", |
199 |
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object(), ++ncyls); |
200 |
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printf("0\n0\n7\n"); |
201 |
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putv(p1); |
202 |
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putv(p2); |
203 |
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printf("%18.12g\n", rad); |
204 |
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return(MG_OK); |
205 |
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} |
206 |
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207 |
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208 |
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int |
209 |
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r_sph(ac, av) /* put out a sphere */ |
210 |
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int ac; |
211 |
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char **av; |
212 |
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{ |
213 |
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static int nsphs; |
214 |
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char *mat; |
215 |
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double rad; |
216 |
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C_VERTEX *cv; |
217 |
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FVECT cent; |
218 |
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int inv; |
219 |
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220 |
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if (ac != 3) |
221 |
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return(MG_EARGC); |
222 |
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if (!isflt(av[2])) |
223 |
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return(MG_ETYPE); |
224 |
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if ((cv = c_getvert(av[1])) == NULL) |
225 |
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return(MG_EUNDEF); |
226 |
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xf_xfmpoint(cent, cv->p); |
227 |
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rad = xf_scale(atof(av[2])); |
228 |
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if ((inv = rad < 0.)) |
229 |
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rad = -rad; |
230 |
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if ((mat = material()) == NULL) |
231 |
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return(MG_EBADMAT); |
232 |
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printf("\n%s %s %ss%d\n", mat, inv ? "bubble" : "sphere", |
233 |
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object(), ++nsphs); |
234 |
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printf("0\n0\n4 %18.12g %18.12g %18.12g %18.12g\n", |
235 |
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cent[0], cent[1], cent[2], rad); |
236 |
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return(MG_OK); |
237 |
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} |
238 |
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239 |
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240 |
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int |
241 |
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r_ring(ac, av) /* put out a ring */ |
242 |
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int ac; |
243 |
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char **av; |
244 |
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{ |
245 |
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static int nrings; |
246 |
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char *mat; |
247 |
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double r1, r2; |
248 |
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C_VERTEX *cv; |
249 |
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FVECT cent, norm; |
250 |
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251 |
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if (ac != 4) |
252 |
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return(MG_EARGC); |
253 |
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if (!isflt(av[2]) || !isflt(av[3])) |
254 |
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return(MG_ETYPE); |
255 |
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if ((cv = c_getvert(av[1])) == NULL) |
256 |
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return(MG_EUNDEF); |
257 |
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if (is0vect(cv->n)) |
258 |
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return(MG_EILL); |
259 |
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xf_xfmpoint(cent, cv->p); |
260 |
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xf_rotvect(norm, cv->n); |
261 |
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r1 = xf_scale(atof(av[2])); |
262 |
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r2 = xf_scale(atof(av[3])); |
263 |
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if (r1 < 0. | r2 <= r1) |
264 |
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return(MG_EILL); |
265 |
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if ((mat = material()) == NULL) |
266 |
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return(MG_EBADMAT); |
267 |
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printf("\n%s ring %sr%d\n", mat, object(), ++nrings); |
268 |
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printf("0\n0\n8\n"); |
269 |
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putv(cent); |
270 |
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putv(norm); |
271 |
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printf("%18.12g %18.12g\n", r1, r2); |
272 |
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return(MG_OK); |
273 |
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} |
274 |
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275 |
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276 |
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int |
277 |
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r_face(ac, av) /* convert a face */ |
278 |
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int ac; |
279 |
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char **av; |
280 |
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{ |
281 |
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static int nfaces; |
282 |
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char *mat; |
283 |
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register int i; |
284 |
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register C_VERTEX *cv; |
285 |
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FVECT v; |
286 |
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int rv; |
287 |
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288 |
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if (ac < 4) |
289 |
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return(MG_EARGC); |
290 |
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if ((mat = material()) == NULL) |
291 |
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return(MG_EBADMAT); |
292 |
greg |
2.2 |
if (ac <= 5) { /* check for surface normals */ |
293 |
greg |
2.1 |
for (i = 1; i < ac; i++) { |
294 |
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if ((cv = c_getvert(av[i])) == NULL) |
295 |
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return(MG_EUNDEF); |
296 |
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if (is0vect(cv->n)) |
297 |
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break; |
298 |
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} |
299 |
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if (i == ac) { /* break into triangles */ |
300 |
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do_tri(mat, av[1], av[2], av[3]); |
301 |
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if (ac == 5) |
302 |
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do_tri(mat, av[3], av[4], av[1]); |
303 |
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return(MG_OK); |
304 |
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} |
305 |
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} |
306 |
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printf("\n%s polygon %sf%d\n", mat, object(), ++nfaces); |
307 |
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printf("0\n0\n%d\n", 3*(ac-1)); |
308 |
|
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for (i = 1; i < ac; i++) { |
309 |
greg |
2.9 |
if ((cv = c_getvert(av[invert ? ac-i : i])) == NULL) |
310 |
greg |
2.1 |
return(MG_EUNDEF); |
311 |
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xf_xfmpoint(v, cv->p); |
312 |
|
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putv(v); |
313 |
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} |
314 |
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return(MG_OK); |
315 |
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} |
316 |
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317 |
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318 |
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r_ies(ac, av) /* convert an IES luminaire file */ |
319 |
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int ac; |
320 |
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char **av; |
321 |
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{ |
322 |
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int xa0 = 2; |
323 |
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char combuf[72]; |
324 |
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char fname[48]; |
325 |
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char *oname; |
326 |
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register char *op; |
327 |
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register int i; |
328 |
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329 |
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if (ac < 2) |
330 |
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return(MG_EARGC); |
331 |
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(void)strcpy(combuf, "ies2rad"); |
332 |
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op = combuf + 7; |
333 |
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if (ac-xa0 >= 2 && !strcmp(av[xa0], "-m")) { |
334 |
|
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if (!isflt(av[xa0+1])) |
335 |
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return(MG_ETYPE); |
336 |
|
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op = addarg(addarg(op, "-m"), av[xa0+1]); |
337 |
|
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xa0 += 2; |
338 |
|
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} |
339 |
|
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if (access(av[1], 0) == -1) |
340 |
|
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return(MG_ENOFILE); |
341 |
|
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*op++ = ' '; /* IES filename goes last */ |
342 |
|
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(void)strcpy(op, av[1]); |
343 |
|
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system(combuf); /* run ies2rad */ |
344 |
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/* now let's find the output file */ |
345 |
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if ((op = strrchr(av[1], '/')) == NULL) |
346 |
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op = av[1]; |
347 |
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(void)strcpy(fname, op); |
348 |
|
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if ((op = strrchr(fname, '.')) == NULL) |
349 |
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op = fname + strlen(fname); |
350 |
|
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(void)strcpy(op, ".rad"); |
351 |
|
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if (access(fname, 0) == -1) |
352 |
|
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return(MG_EINCL); |
353 |
|
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/* put out xform command */ |
354 |
|
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printf("\n!xform"); |
355 |
|
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oname = object(); |
356 |
greg |
2.4 |
if (*oname) { |
357 |
|
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printf(" -n "); |
358 |
|
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for (op = oname; op[1]; op++) /* remove trailing separator */ |
359 |
|
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putchar(*op); |
360 |
|
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} |
361 |
greg |
2.1 |
for (i = xa0; i < ac; i++) |
362 |
|
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printf(" %s", av[i]); |
363 |
|
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if (ac > xa0 && xf_argc > 0) |
364 |
|
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printf(" -i 1"); |
365 |
|
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for (i = 0; i < xf_argc; i++) |
366 |
|
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printf(" %s", xf_argv[i]); |
367 |
|
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printf(" %s\n", fname); |
368 |
|
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return(MG_OK); |
369 |
|
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} |
370 |
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371 |
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|
372 |
|
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do_tri(mat, vn1, vn2, vn3) /* put out smoothed triangle */ |
373 |
|
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char *mat, *vn1, *vn2, *vn3; |
374 |
|
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{ |
375 |
|
|
static int ntris; |
376 |
|
|
BARYCCM bvecs; |
377 |
|
|
FLOAT bcoor[3][3]; |
378 |
|
|
C_VERTEX *cv1, *cv2, *cv3; |
379 |
|
|
FVECT v1, v2, v3; |
380 |
|
|
FVECT n1, n2, n3; |
381 |
|
|
register int i; |
382 |
|
|
/* the following is repeat code, so assume it's OK */ |
383 |
|
|
cv2 = c_getvert(vn2); |
384 |
greg |
2.9 |
if (invert) { |
385 |
|
|
cv3 = c_getvert(vn1); |
386 |
|
|
cv1 = c_getvert(vn3); |
387 |
|
|
} else { |
388 |
|
|
cv1 = c_getvert(vn1); |
389 |
|
|
cv3 = c_getvert(vn3); |
390 |
|
|
} |
391 |
greg |
2.1 |
xf_xfmpoint(v1, cv1->p); |
392 |
|
|
xf_xfmpoint(v2, cv2->p); |
393 |
|
|
xf_xfmpoint(v3, cv3->p); |
394 |
greg |
2.2 |
if (comp_baryc(&bvecs, v1, v2, v3) < 0) |
395 |
|
|
return; /* degenerate triangle! */ |
396 |
|
|
printf("\n%s texfunc T-nor\n", mat); |
397 |
|
|
printf("4 dx dy dz %s\n0\n", TCALNAME); |
398 |
|
|
xf_rotvect(n1, cv1->n); |
399 |
|
|
xf_rotvect(n2, cv2->n); |
400 |
|
|
xf_rotvect(n3, cv3->n); |
401 |
|
|
for (i = 0; i < 3; i++) { |
402 |
|
|
bcoor[i][0] = n1[i]; |
403 |
|
|
bcoor[i][1] = n2[i]; |
404 |
|
|
bcoor[i][2] = n3[i]; |
405 |
greg |
2.1 |
} |
406 |
greg |
2.2 |
put_baryc(&bvecs, bcoor, 3); |
407 |
|
|
printf("\nT-nor polygon %st%d\n", object(), ++ntris); |
408 |
greg |
2.1 |
printf("0\n0\n9\n"); |
409 |
|
|
putv(v1); |
410 |
|
|
putv(v2); |
411 |
|
|
putv(v3); |
412 |
|
|
} |
413 |
|
|
|
414 |
|
|
|
415 |
|
|
char * |
416 |
|
|
material() /* get (and print) current material */ |
417 |
|
|
{ |
418 |
|
|
char *mname = "mat"; |
419 |
|
|
COLOR radrgb, c2; |
420 |
|
|
double d; |
421 |
|
|
register int i; |
422 |
|
|
|
423 |
greg |
2.5 |
if (c_cmname != NULL) |
424 |
|
|
mname = c_cmname; |
425 |
greg |
2.1 |
if (!c_cmaterial->clock) |
426 |
|
|
return(mname); /* already current */ |
427 |
|
|
/* else update output */ |
428 |
|
|
c_cmaterial->clock = 0; |
429 |
|
|
if (c_cmaterial->ed > .1) { /* emitter */ |
430 |
|
|
cvtcolor(radrgb, &c_cmaterial->ed_c, |
431 |
greg |
2.12 |
emult*c_cmaterial->ed/(PI*WHTEFFICACY)); |
432 |
greg |
2.2 |
if (glowdist < FHUGE) { /* do a glow */ |
433 |
greg |
2.11 |
fprintf(matfp, "\nvoid glow %s\n0\n0\n", mname); |
434 |
|
|
fprintf(matfp, "4 %f %f %f %f\n", colval(radrgb,RED), |
435 |
greg |
2.1 |
colval(radrgb,GRN), |
436 |
|
|
colval(radrgb,BLU), glowdist); |
437 |
|
|
} else { |
438 |
greg |
2.11 |
fprintf(matfp, "\nvoid light %s\n0\n0\n", mname); |
439 |
|
|
fprintf(matfp, "3 %f %f %f\n", colval(radrgb,RED), |
440 |
greg |
2.1 |
colval(radrgb,GRN), |
441 |
|
|
colval(radrgb,BLU)); |
442 |
|
|
} |
443 |
|
|
return(mname); |
444 |
|
|
} |
445 |
|
|
d = c_cmaterial->rd + c_cmaterial->td + |
446 |
|
|
c_cmaterial->rs + c_cmaterial->ts; |
447 |
greg |
2.7 |
if (d < 0. | d > 1.) |
448 |
greg |
2.1 |
return(NULL); |
449 |
greg |
2.3 |
/* check for trans */ |
450 |
|
|
if (c_cmaterial->td > .01 || c_cmaterial->ts > .01) { |
451 |
greg |
2.1 |
double ts, a5, a6; |
452 |
|
|
|
453 |
greg |
2.6 |
if (c_cmaterial->sided) { |
454 |
|
|
ts = sqrt(c_cmaterial->ts); /* approximate */ |
455 |
|
|
a5 = .5; |
456 |
greg |
2.7 |
} else { |
457 |
|
|
ts = c_cmaterial->ts; |
458 |
greg |
2.6 |
a5 = 1.; |
459 |
greg |
2.7 |
} |
460 |
greg |
2.1 |
/* average colors */ |
461 |
|
|
d = c_cmaterial->rd + c_cmaterial->td + ts; |
462 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, c_cmaterial->rd/d); |
463 |
|
|
cvtcolor(c2, &c_cmaterial->td_c, c_cmaterial->td/d); |
464 |
|
|
addcolor(radrgb, c2); |
465 |
|
|
cvtcolor(c2, &c_cmaterial->ts_c, ts/d); |
466 |
|
|
addcolor(radrgb, c2); |
467 |
|
|
if (c_cmaterial->rs + ts > .0001) |
468 |
|
|
a5 = (c_cmaterial->rs*c_cmaterial->rs_a + |
469 |
greg |
2.6 |
ts*a5*c_cmaterial->ts_a) / |
470 |
greg |
2.1 |
(c_cmaterial->rs + ts); |
471 |
|
|
a6 = (c_cmaterial->td + ts) / |
472 |
|
|
(c_cmaterial->rd + c_cmaterial->td + ts); |
473 |
greg |
2.7 |
if (a6 < .999) |
474 |
greg |
2.1 |
d = c_cmaterial->rd/(1. - c_cmaterial->rs)/(1. - a6); |
475 |
greg |
2.7 |
else |
476 |
|
|
d = c_cmaterial->td + ts; |
477 |
|
|
scalecolor(radrgb, d); |
478 |
greg |
2.11 |
fprintf(matfp, "\nvoid trans %s\n0\n0\n", mname); |
479 |
|
|
fprintf(matfp, "7 %f %f %f\n", colval(radrgb,RED), |
480 |
greg |
2.1 |
colval(radrgb,GRN), colval(radrgb,BLU)); |
481 |
greg |
2.11 |
fprintf(matfp, "\t%f %f %f %f\n", c_cmaterial->rs, a5, a6, |
482 |
greg |
2.1 |
ts/(ts + c_cmaterial->td)); |
483 |
|
|
return(mname); |
484 |
|
|
} |
485 |
greg |
2.3 |
/* check for plastic */ |
486 |
greg |
2.7 |
if (c_cmaterial->rs < .1 && (c_cmaterial->rs < .01 || |
487 |
|
|
c_isgrey(&c_cmaterial->rs_c))) { |
488 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, |
489 |
greg |
2.1 |
c_cmaterial->rd/(1.-c_cmaterial->rs)); |
490 |
greg |
2.11 |
fprintf(matfp, "\nvoid plastic %s\n0\n0\n", mname); |
491 |
|
|
fprintf(matfp, "5 %f %f %f %f %f\n", colval(radrgb,RED), |
492 |
greg |
2.1 |
colval(radrgb,GRN), colval(radrgb,BLU), |
493 |
|
|
c_cmaterial->rs, c_cmaterial->rs_a); |
494 |
|
|
return(mname); |
495 |
|
|
} |
496 |
|
|
/* else it's metal */ |
497 |
greg |
2.7 |
/* average colors */ |
498 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, c_cmaterial->rd); |
499 |
|
|
cvtcolor(c2, &c_cmaterial->rs_c, c_cmaterial->rs); |
500 |
greg |
2.1 |
addcolor(radrgb, c2); |
501 |
greg |
2.11 |
fprintf(matfp, "\nvoid metal %s\n0\n0\n", mname); |
502 |
|
|
fprintf(matfp, "5 %f %f %f %f %f\n", colval(radrgb,RED), |
503 |
greg |
2.1 |
colval(radrgb,GRN), colval(radrgb,BLU), |
504 |
greg |
2.7 |
c_cmaterial->rs/(c_cmaterial->rd + c_cmaterial->rs), |
505 |
|
|
c_cmaterial->rs_a); |
506 |
greg |
2.1 |
return(mname); |
507 |
|
|
} |
508 |
|
|
|
509 |
|
|
|
510 |
|
|
cvtcolor(radrgb, ciec, intensity) /* convert a CIE color to Radiance */ |
511 |
|
|
COLOR radrgb; |
512 |
|
|
register C_COLOR *ciec; |
513 |
|
|
double intensity; |
514 |
|
|
{ |
515 |
|
|
static COLOR ciexyz; |
516 |
|
|
|
517 |
greg |
2.4 |
c_ccvt(ciec, C_CSXY); /* get xy representation */ |
518 |
greg |
2.1 |
ciexyz[1] = intensity; |
519 |
|
|
ciexyz[0] = ciec->cx/ciec->cy*ciexyz[1]; |
520 |
|
|
ciexyz[2] = ciexyz[1]*(1./ciec->cy - 1.) - ciexyz[0]; |
521 |
|
|
cie_rgb(radrgb, ciexyz); |
522 |
|
|
} |
523 |
|
|
|
524 |
|
|
|
525 |
|
|
char * |
526 |
|
|
object() /* return current object name */ |
527 |
|
|
{ |
528 |
|
|
static char objbuf[64]; |
529 |
|
|
register int i; |
530 |
|
|
register char *cp; |
531 |
|
|
int len; |
532 |
|
|
|
533 |
|
|
i = obj_nnames - sizeof(objbuf)/16; |
534 |
|
|
if (i < 0) |
535 |
|
|
i = 0; |
536 |
|
|
for (cp = objbuf; i < obj_nnames && |
537 |
|
|
cp + (len=strlen(obj_name[i])) < objbuf+sizeof(objbuf)-1; |
538 |
|
|
i++, *cp++ = '.') { |
539 |
|
|
strcpy(cp, obj_name[i]); |
540 |
|
|
cp += len; |
541 |
|
|
} |
542 |
|
|
*cp = '\0'; |
543 |
|
|
return(objbuf); |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
|
547 |
|
|
char * |
548 |
|
|
addarg(op, arg) /* add argument and advance pointer */ |
549 |
|
|
register char *op, *arg; |
550 |
|
|
{ |
551 |
|
|
*op = ' '; |
552 |
|
|
while (*++op = *arg++) |
553 |
|
|
; |
554 |
|
|
return(op); |
555 |
|
|
} |