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"; |
5 |
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#endif |
6 |
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7 |
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/* |
8 |
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* Convert a Wavefront .obj file to Radiance format. |
9 |
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* |
10 |
greg |
2.5 |
* Currently, we support only polygonal geometry. Non-planar |
11 |
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* faces are broken rather haphazardly into triangles. |
12 |
greg |
2.3 |
* Also, texture map indices only work for triangles, though |
13 |
greg |
2.7 |
* I'm not sure they work correctly. (Taken out -- see TEXMAPS defines.) |
14 |
greg |
2.1 |
*/ |
15 |
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16 |
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#include "standard.h" |
17 |
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18 |
greg |
2.3 |
#include "trans.h" |
19 |
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|
20 |
greg |
2.1 |
#include <ctype.h> |
21 |
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|
22 |
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#define TCALNAME "tmesh.cal" /* triangle interp. file */ |
23 |
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#define PATNAME "M-pat" /* mesh pattern name (reused) */ |
24 |
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#define TEXNAME "M-nor" /* mesh texture name (reused) */ |
25 |
greg |
2.3 |
#define DEFOBJ "unnamed" /* default object name */ |
26 |
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#define DEFMAT "white" /* default material name */ |
27 |
greg |
2.1 |
|
28 |
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#define ABS(x) ((x)>=0 ? (x) : -(x)) |
29 |
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30 |
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#define pvect(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
31 |
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32 |
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FVECT *vlist; /* our vertex list */ |
33 |
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int nvs; /* number of vertices in our list */ |
34 |
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FVECT *vnlist; /* vertex normal list */ |
35 |
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int nvns; |
36 |
greg |
2.3 |
FLOAT (*vtlist)[2]; /* map vertex list */ |
37 |
greg |
2.1 |
int nvts; |
38 |
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39 |
greg |
2.10 |
typedef struct { |
40 |
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int ax; /* major axis */ |
41 |
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FLOAT tm[2][3]; /* transformation */ |
42 |
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} BARYCCM; |
43 |
greg |
2.1 |
|
44 |
greg |
2.3 |
typedef int VNDX[3]; /* vertex index (point,map,normal) */ |
45 |
greg |
2.1 |
|
46 |
greg |
2.3 |
#define CHUNKSIZ 256 /* vertex allocation chunk size */ |
47 |
greg |
2.1 |
|
48 |
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#define MAXARG 64 /* maximum # arguments in a statement */ |
49 |
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|
50 |
greg |
2.3 |
/* qualifiers */ |
51 |
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#define Q_MTL 0 |
52 |
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#define Q_MAP 1 |
53 |
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#define Q_GRP 2 |
54 |
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#define Q_OBJ 3 |
55 |
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#define Q_FAC 4 |
56 |
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#define NQUALS 5 |
57 |
greg |
2.1 |
|
58 |
greg |
2.3 |
char *qname[NQUALS] = { |
59 |
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"Material", |
60 |
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"Map", |
61 |
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"Group", |
62 |
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"Object", |
63 |
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"Face", |
64 |
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}; |
65 |
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66 |
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QLIST qlist = {NQUALS, qname}; |
67 |
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/* valid qualifier ids */ |
68 |
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IDLIST qual[NQUALS]; |
69 |
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/* mapping rules */ |
70 |
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RULEHD *ourmapping = NULL; |
71 |
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72 |
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char *defmat = DEFMAT; /* default (starting) material name */ |
73 |
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char *defobj = DEFOBJ; /* default (starting) object name */ |
74 |
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|
75 |
greg |
2.8 |
int flatten = 0; /* discard surface normal information */ |
76 |
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77 |
greg |
2.3 |
char *getmtl(), *getonm(); |
78 |
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79 |
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char mapname[128]; /* current picture file */ |
80 |
greg |
2.1 |
char matname[64]; /* current material name */ |
81 |
greg |
2.3 |
char group[16][32]; /* current group names */ |
82 |
greg |
2.1 |
char objname[128]; /* current object name */ |
83 |
greg |
2.6 |
char *inpfile; /* input file name */ |
84 |
greg |
2.1 |
int lineno; /* current line number */ |
85 |
greg |
2.6 |
int faceno; /* current face number */ |
86 |
greg |
2.1 |
|
87 |
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|
88 |
greg |
2.3 |
main(argc, argv) /* read in .obj file and convert */ |
89 |
greg |
2.1 |
int argc; |
90 |
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char *argv[]; |
91 |
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{ |
92 |
greg |
2.6 |
int donames = 0; |
93 |
greg |
2.1 |
int i; |
94 |
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95 |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
96 |
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switch (argv[i][1]) { |
97 |
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case 'o': /* object name */ |
98 |
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defobj = argv[++i]; |
99 |
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break; |
100 |
greg |
2.3 |
case 'n': /* just produce name list */ |
101 |
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donames++; |
102 |
greg |
2.1 |
break; |
103 |
greg |
2.3 |
case 'm': /* use custom mapfile */ |
104 |
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ourmapping = getmapping(argv[++i], &qlist); |
105 |
greg |
2.1 |
break; |
106 |
greg |
2.8 |
case 'f': /* flatten surfaces */ |
107 |
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flatten++; |
108 |
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break; |
109 |
greg |
2.1 |
default: |
110 |
greg |
2.3 |
goto userr; |
111 |
greg |
2.1 |
} |
112 |
greg |
2.3 |
if (i > argc | i < argc-1) |
113 |
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goto userr; |
114 |
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if (i == argc) |
115 |
greg |
2.6 |
inpfile = "<stdin>"; |
116 |
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else if (freopen(inpfile=argv[i], "r", stdin) == NULL) { |
117 |
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fprintf(stderr, "%s: cannot open\n", inpfile); |
118 |
greg |
2.3 |
exit(1); |
119 |
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} |
120 |
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if (donames) { /* scan for ids */ |
121 |
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getnames(stdin); |
122 |
greg |
2.6 |
printf("filename \"%s\"\n", inpfile); |
123 |
greg |
2.3 |
printf("filetype \"Wavefront\"\n"); |
124 |
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write_quals(&qlist, qual, stdout); |
125 |
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printf("qualifier %s begin\n", qlist.qual[Q_FAC]); |
126 |
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printf("[%d:%d]\n", 1, faceno); |
127 |
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printf("end\n"); |
128 |
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} else { /* translate file */ |
129 |
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printf("# "); |
130 |
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printargs(argc, argv, stdout); |
131 |
greg |
2.6 |
convert(stdin); |
132 |
greg |
2.3 |
} |
133 |
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exit(0); |
134 |
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userr: |
135 |
greg |
2.9 |
fprintf(stderr, "Usage: %s [-o obj][-m mapping][-n][-f] [file.obj]\n", |
136 |
greg |
2.3 |
argv[0]); |
137 |
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exit(1); |
138 |
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} |
139 |
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140 |
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141 |
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getnames(fp) /* get valid qualifier names */ |
142 |
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FILE *fp; |
143 |
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{ |
144 |
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char *argv[MAXARG]; |
145 |
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int argc; |
146 |
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ID tmpid; |
147 |
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register int i; |
148 |
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149 |
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while (argc = getstmt(argv, fp)) |
150 |
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switch (argv[0][0]) { |
151 |
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case 'f': /* face */ |
152 |
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if (!argv[0][1]) |
153 |
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faceno++; |
154 |
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break; |
155 |
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case 'u': |
156 |
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if (!strcmp(argv[0], "usemtl")) { /* material */ |
157 |
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if (argc < 2) |
158 |
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break; /* not fatal */ |
159 |
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tmpid.number = 0; |
160 |
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tmpid.name = argv[1]; |
161 |
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findid(&qual[Q_MTL], &tmpid, 1); |
162 |
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} else if (!strcmp(argv[0], "usemap")) {/* map */ |
163 |
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if (argc < 2 || !strcmp(argv[1], "off")) |
164 |
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break; /* not fatal */ |
165 |
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tmpid.number = 0; |
166 |
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tmpid.name = argv[1]; |
167 |
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findid(&qual[Q_MAP], &tmpid, 1); |
168 |
greg |
2.1 |
} |
169 |
greg |
2.3 |
break; |
170 |
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case 'o': /* object name */ |
171 |
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if (argv[0][1] || argc < 2) |
172 |
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break; |
173 |
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tmpid.number = 0; |
174 |
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tmpid.name = argv[1]; |
175 |
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findid(&qual[Q_OBJ], &tmpid, 1); |
176 |
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break; |
177 |
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case 'g': /* group name(s) */ |
178 |
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if (argv[0][1]) |
179 |
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break; |
180 |
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tmpid.number = 0; |
181 |
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for (i = 1; i < argc; i++) { |
182 |
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tmpid.name = argv[i]; |
183 |
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findid(&qual[Q_GRP], &tmpid, 1); |
184 |
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} |
185 |
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break; |
186 |
greg |
2.1 |
} |
187 |
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} |
188 |
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189 |
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190 |
greg |
2.6 |
convert(fp) /* convert a T-mesh */ |
191 |
greg |
2.1 |
FILE *fp; |
192 |
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{ |
193 |
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char *argv[MAXARG]; |
194 |
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int argc; |
195 |
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int nstats, nunknown; |
196 |
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register int i; |
197 |
greg |
2.6 |
|
198 |
greg |
2.1 |
nstats = nunknown = 0; |
199 |
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/* scan until EOF */ |
200 |
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while (argc = getstmt(argv, fp)) { |
201 |
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switch (argv[0][0]) { |
202 |
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case 'v': /* vertex */ |
203 |
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switch (argv[0][1]) { |
204 |
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case '\0': /* point */ |
205 |
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if (badarg(argc-1,argv+1,"fff")) |
206 |
greg |
2.6 |
syntax("Bad vertex"); |
207 |
greg |
2.1 |
newv(atof(argv[1]), atof(argv[2]), |
208 |
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atof(argv[3])); |
209 |
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break; |
210 |
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case 'n': /* normal */ |
211 |
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if (argv[0][2]) |
212 |
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goto unknown; |
213 |
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if (badarg(argc-1,argv+1,"fff")) |
214 |
greg |
2.6 |
syntax("Bad normal"); |
215 |
greg |
2.1 |
if (!newvn(atof(argv[1]), atof(argv[2]), |
216 |
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atof(argv[3]))) |
217 |
greg |
2.6 |
syntax("Zero normal"); |
218 |
greg |
2.1 |
break; |
219 |
greg |
2.3 |
case 't': /* texture map */ |
220 |
greg |
2.1 |
if (argv[0][2]) |
221 |
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goto unknown; |
222 |
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if (badarg(argc-1,argv+1,"ff")) |
223 |
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goto unknown; |
224 |
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newvt(atof(argv[1]), atof(argv[2])); |
225 |
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break; |
226 |
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default: |
227 |
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goto unknown; |
228 |
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} |
229 |
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break; |
230 |
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case 'f': /* face */ |
231 |
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if (argv[0][1]) |
232 |
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goto unknown; |
233 |
greg |
2.3 |
faceno++; |
234 |
greg |
2.1 |
switch (argc-1) { |
235 |
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case 0: case 1: case 2: |
236 |
greg |
2.6 |
syntax("Too few vertices"); |
237 |
greg |
2.1 |
break; |
238 |
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case 3: |
239 |
|
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if (!puttri(argv[1], argv[2], argv[3])) |
240 |
greg |
2.6 |
syntax("Bad triangle"); |
241 |
greg |
2.1 |
break; |
242 |
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default: |
243 |
|
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if (!putface(argc-1, argv+1)) |
244 |
greg |
2.6 |
syntax("Bad face"); |
245 |
greg |
2.1 |
break; |
246 |
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} |
247 |
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break; |
248 |
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case 'u': |
249 |
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if (!strcmp(argv[0], "usemtl")) { /* material */ |
250 |
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if (argc < 2) |
251 |
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break; /* not fatal */ |
252 |
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strcpy(matname, argv[1]); |
253 |
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} else if (!strcmp(argv[0], "usemap")) {/* map */ |
254 |
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if (argc < 2) |
255 |
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break; /* not fatal */ |
256 |
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if (!strcmp(argv[1], "off")) |
257 |
greg |
2.3 |
mapname[0] = '\0'; |
258 |
greg |
2.1 |
else |
259 |
greg |
2.7 |
sprintf(mapname, "%s.pic", argv[1]); |
260 |
greg |
2.1 |
} else |
261 |
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goto unknown; |
262 |
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break; |
263 |
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case 'o': /* object name */ |
264 |
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if (argv[0][1]) |
265 |
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goto unknown; |
266 |
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if (argc < 2) |
267 |
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break; /* not fatal */ |
268 |
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strcpy(objname, argv[1]); |
269 |
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break; |
270 |
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case 'g': /* group name(s) */ |
271 |
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if (argv[0][1]) |
272 |
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goto unknown; |
273 |
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for (i = 1; i < argc; i++) |
274 |
greg |
2.3 |
strcpy(group[i-1], argv[i]); |
275 |
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group[i-1][0] = '\0'; |
276 |
greg |
2.1 |
break; |
277 |
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case '#': /* comment */ |
278 |
greg |
2.7 |
printargs(argc, argv, stdout); |
279 |
greg |
2.1 |
break; |
280 |
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default:; /* something we don't deal with */ |
281 |
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unknown: |
282 |
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nunknown++; |
283 |
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break; |
284 |
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} |
285 |
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nstats++; |
286 |
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} |
287 |
greg |
2.6 |
printf("\n# Done processing file: %s\n", inpfile); |
288 |
greg |
2.1 |
printf("# %d lines, %d statements, %d unrecognized\n", |
289 |
|
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lineno, nstats, nunknown); |
290 |
|
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} |
291 |
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|
292 |
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|
293 |
|
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int |
294 |
|
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getstmt(av, fp) /* read the next statement from fp */ |
295 |
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register char *av[MAXARG]; |
296 |
|
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FILE *fp; |
297 |
|
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{ |
298 |
|
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extern char *fgetline(); |
299 |
|
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static char sbuf[MAXARG*10]; |
300 |
|
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register char *cp; |
301 |
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register int i; |
302 |
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|
303 |
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do { |
304 |
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if (fgetline(cp=sbuf, sizeof(sbuf), fp) == NULL) |
305 |
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return(0); |
306 |
|
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i = 0; |
307 |
|
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for ( ; ; ) { |
308 |
|
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while (isspace(*cp) || *cp == '\\') { |
309 |
|
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if (*cp == '\n') |
310 |
|
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lineno++; |
311 |
|
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*cp++ = '\0'; |
312 |
|
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} |
313 |
|
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if (!*cp || i >= MAXARG-1) |
314 |
|
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break; |
315 |
|
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av[i++] = cp; |
316 |
|
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while (*++cp && !isspace(*cp)) |
317 |
|
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; |
318 |
|
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} |
319 |
|
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av[i] = NULL; |
320 |
|
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lineno++; |
321 |
|
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} while (!i); |
322 |
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|
323 |
|
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return(i); |
324 |
|
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} |
325 |
|
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|
326 |
greg |
2.3 |
|
327 |
|
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char * |
328 |
|
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getmtl() /* figure material for this face */ |
329 |
|
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{ |
330 |
|
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register RULEHD *rp = ourmapping; |
331 |
|
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|
332 |
greg |
2.6 |
if (rp == NULL) { /* no rule set */ |
333 |
|
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if (matname[0]) |
334 |
|
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return(matname); |
335 |
|
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if (group[0][0]) |
336 |
|
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return(group[0]); |
337 |
|
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return(defmat); |
338 |
|
|
} |
339 |
greg |
2.3 |
/* check for match */ |
340 |
|
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do { |
341 |
|
|
if (matchrule(rp)) { |
342 |
|
|
if (!strcmp(rp->mnam, VOIDID)) |
343 |
|
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return(NULL); /* match is null */ |
344 |
|
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return(rp->mnam); |
345 |
|
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} |
346 |
|
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rp = rp->next; |
347 |
|
|
} while (rp != NULL); |
348 |
|
|
/* no match found */ |
349 |
|
|
return(NULL); |
350 |
|
|
} |
351 |
|
|
|
352 |
|
|
|
353 |
|
|
char * |
354 |
|
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getonm() /* invent a good name for object */ |
355 |
|
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{ |
356 |
|
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static char name[64]; |
357 |
|
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register char *cp1, *cp2; |
358 |
|
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register int i; |
359 |
greg |
2.6 |
/* check for preset */ |
360 |
|
|
if (objname[0]) |
361 |
|
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return(objname); |
362 |
|
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if (!group[0][0]) |
363 |
|
|
return(defobj); |
364 |
greg |
2.3 |
cp1 = name; /* else make name out of groups */ |
365 |
|
|
for (i = 0; group[i][0]; i++) { |
366 |
|
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cp2 = group[i]; |
367 |
|
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if (cp1 > name) |
368 |
|
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*cp1++ = '.'; |
369 |
|
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while (*cp1 = *cp2++) |
370 |
|
|
if (++cp1 >= name+sizeof(name)-2) { |
371 |
|
|
*cp1 = '\0'; |
372 |
|
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return(name); |
373 |
|
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} |
374 |
|
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} |
375 |
|
|
return(name); |
376 |
|
|
} |
377 |
|
|
|
378 |
|
|
|
379 |
|
|
matchrule(rp) /* check for a match on this rule */ |
380 |
|
|
register RULEHD *rp; |
381 |
|
|
{ |
382 |
|
|
ID tmpid; |
383 |
|
|
int gotmatch; |
384 |
|
|
register int i; |
385 |
|
|
|
386 |
|
|
if (rp->qflg & FL(Q_MTL)) { |
387 |
greg |
2.6 |
if (!matname[0]) |
388 |
|
|
return(0); |
389 |
greg |
2.3 |
tmpid.number = 0; |
390 |
|
|
tmpid.name = matname; |
391 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_MTL])) |
392 |
|
|
return(0); |
393 |
|
|
} |
394 |
|
|
if (rp->qflg & FL(Q_MAP)) { |
395 |
greg |
2.6 |
if (!mapname[0]) |
396 |
|
|
return(0); |
397 |
greg |
2.3 |
tmpid.number = 0; |
398 |
|
|
tmpid.name = mapname; |
399 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_MAP])) |
400 |
|
|
return(0); |
401 |
|
|
} |
402 |
|
|
if (rp->qflg & FL(Q_GRP)) { |
403 |
|
|
tmpid.number = 0; |
404 |
|
|
gotmatch = 0; |
405 |
|
|
for (i = 0; group[i][0]; i++) { |
406 |
|
|
tmpid.name = group[i]; |
407 |
|
|
gotmatch |= matchid(&tmpid, &idm(rp)[Q_GRP]); |
408 |
|
|
} |
409 |
|
|
if (!gotmatch) |
410 |
|
|
return(0); |
411 |
|
|
} |
412 |
|
|
if (rp->qflg & FL(Q_OBJ)) { |
413 |
greg |
2.6 |
if (!objname[0]) |
414 |
|
|
return(0); |
415 |
greg |
2.3 |
tmpid.number = 0; |
416 |
|
|
tmpid.name = objname; |
417 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_OBJ])) |
418 |
|
|
return(0); |
419 |
|
|
} |
420 |
|
|
if (rp->qflg & FL(Q_FAC)) { |
421 |
|
|
tmpid.name = NULL; |
422 |
|
|
tmpid.number = faceno; |
423 |
|
|
if (!matchid(&tmpid, &idm(rp)[Q_FAC])) |
424 |
|
|
return(0); |
425 |
|
|
} |
426 |
|
|
return(1); |
427 |
|
|
} |
428 |
|
|
|
429 |
|
|
|
430 |
greg |
2.1 |
cvtndx(vi, vs) /* convert vertex string to index */ |
431 |
|
|
register VNDX vi; |
432 |
|
|
register char *vs; |
433 |
|
|
{ |
434 |
|
|
/* get point */ |
435 |
|
|
vi[0] = atoi(vs); |
436 |
|
|
if (vi[0] > 0) { |
437 |
|
|
if (vi[0]-- > nvs) |
438 |
|
|
return(0); |
439 |
|
|
} else if (vi[0] < 0) { |
440 |
greg |
2.9 |
vi[0] += nvs; |
441 |
greg |
2.1 |
if (vi[0] < 0) |
442 |
|
|
return(0); |
443 |
|
|
} else |
444 |
|
|
return(0); |
445 |
greg |
2.3 |
/* get map */ |
446 |
greg |
2.1 |
while (*vs) |
447 |
|
|
if (*vs++ == '/') |
448 |
|
|
break; |
449 |
|
|
vi[1] = atoi(vs); |
450 |
|
|
if (vi[1] > 0) { |
451 |
|
|
if (vi[1]-- > nvts) |
452 |
|
|
return(0); |
453 |
|
|
} else if (vi[1] < 0) { |
454 |
greg |
2.9 |
vi[1] += nvts; |
455 |
greg |
2.1 |
if (vi[1] < 0) |
456 |
|
|
return(0); |
457 |
|
|
} else |
458 |
|
|
vi[1] = -1; |
459 |
|
|
/* get normal */ |
460 |
|
|
while (*vs) |
461 |
|
|
if (*vs++ == '/') |
462 |
|
|
break; |
463 |
|
|
vi[2] = atoi(vs); |
464 |
|
|
if (vi[2] > 0) { |
465 |
|
|
if (vi[2]-- > nvns) |
466 |
|
|
return(0); |
467 |
|
|
} else if (vi[2] < 0) { |
468 |
greg |
2.9 |
vi[2] += nvns; |
469 |
greg |
2.1 |
if (vi[2] < 0) |
470 |
|
|
return(0); |
471 |
|
|
} else |
472 |
|
|
vi[2] = -1; |
473 |
|
|
return(1); |
474 |
|
|
} |
475 |
|
|
|
476 |
|
|
|
477 |
greg |
2.9 |
nonplanar(ac, av) /* are vertices non-planar? */ |
478 |
greg |
2.1 |
register int ac; |
479 |
|
|
register char **av; |
480 |
|
|
{ |
481 |
|
|
VNDX vi; |
482 |
greg |
2.5 |
FLOAT *p0, *p1; |
483 |
|
|
FVECT v1, v2, nsum, newn; |
484 |
|
|
double d; |
485 |
|
|
register int i; |
486 |
|
|
|
487 |
|
|
if (!cvtndx(vi, av[0])) |
488 |
|
|
return(0); |
489 |
|
|
if (vi[2] >= 0) |
490 |
|
|
return(1); /* has interpolated normals */ |
491 |
|
|
if (ac < 4) |
492 |
|
|
return(0); /* it's a triangle! */ |
493 |
|
|
/* set up */ |
494 |
|
|
p0 = vlist[vi[0]]; |
495 |
|
|
if (!cvtndx(vi, av[1])) |
496 |
|
|
return(0); /* error gets caught later */ |
497 |
|
|
nsum[0] = nsum[1] = nsum[2] = 0.; |
498 |
|
|
p1 = vlist[vi[0]]; |
499 |
|
|
fvsum(v2, p1, p0, -1.0); |
500 |
|
|
for (i = 2; i < ac; i++) { |
501 |
|
|
VCOPY(v1, v2); |
502 |
|
|
if (!cvtndx(vi, av[i])) |
503 |
|
|
return(0); |
504 |
|
|
p1 = vlist[vi[0]]; |
505 |
|
|
fvsum(v2, p1, p0, -1.0); |
506 |
|
|
fcross(newn, v1, v2); |
507 |
|
|
if (normalize(newn) == 0.0) { |
508 |
|
|
if (i < 3) |
509 |
|
|
return(1); /* can't deal with this */ |
510 |
|
|
fvsum(nsum, nsum, nsum, 1./(i-2)); |
511 |
|
|
continue; |
512 |
|
|
} |
513 |
|
|
d = fdot(newn,nsum); |
514 |
|
|
if (d >= 0) { |
515 |
|
|
if (d < (1.0-FTINY)*(i-2)) |
516 |
|
|
return(1); |
517 |
|
|
fvsum(nsum, nsum, newn, 1.0); |
518 |
|
|
} else { |
519 |
|
|
if (d > -(1.0-FTINY)*(i-2)) |
520 |
|
|
return(1); |
521 |
|
|
fvsum(nsum, nsum, newn, -1.0); |
522 |
|
|
} |
523 |
|
|
} |
524 |
|
|
return(0); |
525 |
|
|
} |
526 |
|
|
|
527 |
|
|
|
528 |
|
|
putface(ac, av) /* put out an N-sided polygon */ |
529 |
|
|
int ac; |
530 |
|
|
register char **av; |
531 |
|
|
{ |
532 |
|
|
VNDX vi; |
533 |
greg |
2.7 |
char *cp; |
534 |
greg |
2.5 |
register int i; |
535 |
greg |
2.1 |
|
536 |
greg |
2.11 |
if (nonplanar(ac, av)) { /* break into triangles */ |
537 |
|
|
while (ac > 2) { |
538 |
|
|
if (!puttri(av[0], av[1], av[2])) |
539 |
greg |
2.5 |
return(0); |
540 |
greg |
2.11 |
ac--; /* remove vertex & rotate */ |
541 |
greg |
2.7 |
cp = av[0]; |
542 |
|
|
for (i = 0; i < ac-1; i++) |
543 |
greg |
2.11 |
av[i] = av[i+2]; |
544 |
greg |
2.7 |
av[i] = cp; |
545 |
greg |
2.5 |
} |
546 |
|
|
return(1); |
547 |
|
|
} |
548 |
greg |
2.7 |
if ((cp = getmtl()) == NULL) |
549 |
greg |
2.3 |
return(-1); |
550 |
greg |
2.7 |
printf("\n%s polygon %s.%d\n", cp, getonm(), faceno); |
551 |
greg |
2.1 |
printf("0\n0\n%d\n", 3*ac); |
552 |
greg |
2.5 |
for (i = 0; i < ac; i++) { |
553 |
|
|
if (!cvtndx(vi, av[i])) |
554 |
greg |
2.1 |
return(0); |
555 |
|
|
pvect(vlist[vi[0]]); |
556 |
|
|
} |
557 |
|
|
return(1); |
558 |
|
|
} |
559 |
|
|
|
560 |
|
|
|
561 |
|
|
puttri(v1, v2, v3) /* put out a triangle */ |
562 |
|
|
char *v1, *v2, *v3; |
563 |
|
|
{ |
564 |
greg |
2.3 |
char *mod; |
565 |
greg |
2.1 |
VNDX v1i, v2i, v3i; |
566 |
|
|
BARYCCM bvecs; |
567 |
greg |
2.2 |
int texOK, patOK; |
568 |
greg |
2.1 |
|
569 |
greg |
2.3 |
if ((mod = getmtl()) == NULL) |
570 |
|
|
return(-1); |
571 |
|
|
|
572 |
greg |
2.1 |
if (!cvtndx(v1i, v1) || !cvtndx(v2i, v2) || !cvtndx(v3i, v3)) |
573 |
|
|
return(0); |
574 |
|
|
/* compute barycentric coordinates */ |
575 |
greg |
2.8 |
texOK = !flatten && (v1i[2]>=0 && v2i[2]>=0 && v3i[2]>=0); |
576 |
greg |
2.7 |
#ifdef TEXMAPS |
577 |
greg |
2.3 |
patOK = mapname[0] && (v1i[1]>=0 && v2i[1]>=0 && v3i[1]>=0); |
578 |
greg |
2.7 |
#else |
579 |
|
|
patOK = 0; |
580 |
|
|
#endif |
581 |
greg |
2.2 |
if (texOK | patOK) |
582 |
greg |
2.10 |
if (comp_baryc(&bvecs, vlist[v1i[0]], vlist[v2i[0]], |
583 |
greg |
2.1 |
vlist[v3i[0]]) < 0) |
584 |
greg |
2.2 |
return(-1); |
585 |
greg |
2.1 |
/* put out texture (if any) */ |
586 |
greg |
2.2 |
if (texOK) { |
587 |
greg |
2.1 |
printf("\n%s texfunc %s\n", mod, TEXNAME); |
588 |
|
|
mod = TEXNAME; |
589 |
|
|
printf("4 dx dy dz %s\n", TCALNAME); |
590 |
greg |
2.10 |
printf("0\n16 "); |
591 |
|
|
put_baryc(&bvecs); |
592 |
greg |
2.1 |
printf("\t%14.12g %14.12g %14.12g\n", |
593 |
|
|
vnlist[v1i[2]][0], vnlist[v2i[2]][0], |
594 |
|
|
vnlist[v3i[2]][0]); |
595 |
|
|
printf("\t%14.12g %14.12g %14.12g\n", |
596 |
|
|
vnlist[v1i[2]][1], vnlist[v2i[2]][1], |
597 |
|
|
vnlist[v3i[2]][1]); |
598 |
|
|
printf("\t%14.12g %14.12g %14.12g\n", |
599 |
|
|
vnlist[v1i[2]][2], vnlist[v2i[2]][2], |
600 |
|
|
vnlist[v3i[2]][2]); |
601 |
|
|
} |
602 |
greg |
2.7 |
#ifdef TEXMAPS |
603 |
greg |
2.1 |
/* put out pattern (if any) */ |
604 |
greg |
2.2 |
if (patOK) { |
605 |
greg |
2.1 |
printf("\n%s colorpict %s\n", mod, PATNAME); |
606 |
|
|
mod = PATNAME; |
607 |
greg |
2.3 |
printf("7 noneg noneg noneg %s %s u v\n", mapname, TCALNAME); |
608 |
greg |
2.10 |
printf("0\n13 "); |
609 |
|
|
put_baryc(&bvecs); |
610 |
greg |
2.1 |
printf("\t%f %f %f\n", vtlist[v1i[1]][0], |
611 |
|
|
vtlist[v2i[1]][0], vtlist[v3i[1]][0]); |
612 |
|
|
printf("\t%f %f %f\n", vtlist[v1i[1]][1], |
613 |
|
|
vtlist[v2i[1]][1], vtlist[v3i[1]][1]); |
614 |
|
|
} |
615 |
greg |
2.7 |
#endif |
616 |
greg |
2.1 |
/* put out triangle */ |
617 |
greg |
2.3 |
printf("\n%s polygon %s.%d\n", mod, getonm(), faceno); |
618 |
greg |
2.1 |
printf("0\n0\n9\n"); |
619 |
|
|
pvect(vlist[v1i[0]]); |
620 |
|
|
pvect(vlist[v2i[0]]); |
621 |
|
|
pvect(vlist[v3i[0]]); |
622 |
|
|
|
623 |
|
|
return(1); |
624 |
|
|
} |
625 |
|
|
|
626 |
|
|
|
627 |
|
|
int |
628 |
|
|
comp_baryc(bcm, v1, v2, v3) /* compute barycentric vectors */ |
629 |
greg |
2.10 |
register BARYCCM *bcm; |
630 |
greg |
2.1 |
FLOAT *v1, *v2, *v3; |
631 |
|
|
{ |
632 |
|
|
FLOAT *vt; |
633 |
|
|
FVECT va, vab, vcb; |
634 |
|
|
double d; |
635 |
greg |
2.10 |
int ax0, ax1; |
636 |
greg |
2.1 |
register int i, j; |
637 |
greg |
2.10 |
/* compute major axis */ |
638 |
|
|
for (i = 0; i < 3; i++) { |
639 |
|
|
vab[i] = v1[i] - v2[i]; |
640 |
|
|
vcb[i] = v3[i] - v2[i]; |
641 |
|
|
} |
642 |
|
|
fcross(va, vab, vcb); |
643 |
|
|
bcm->ax = ABS(va[0]) > ABS(va[1]) ? 0 : 1; |
644 |
|
|
bcm->ax = ABS(va[bcm->ax]) > ABS(va[2]) ? bcm->ax : 2; |
645 |
|
|
ax0 = (bcm->ax + 1) % 3; |
646 |
|
|
ax1 = (bcm->ax + 2) % 3; |
647 |
|
|
for (j = 0; j < 2; j++) { |
648 |
|
|
vab[0] = v1[ax0] - v2[ax0]; |
649 |
|
|
vcb[0] = v3[ax0] - v2[ax0]; |
650 |
|
|
vab[1] = v1[ax1] - v2[ax1]; |
651 |
|
|
vcb[1] = v3[ax1] - v2[ax1]; |
652 |
|
|
d = vcb[0]*vcb[0] + vcb[1]*vcb[1]; |
653 |
greg |
2.1 |
if (d <= FTINY) |
654 |
|
|
return(-1); |
655 |
greg |
2.10 |
d = (vcb[0]*vab[0]+vcb[1]*vab[1])/d; |
656 |
|
|
va[0] = vab[0] - vcb[0]*d; |
657 |
|
|
va[1] = vab[1] - vcb[1]*d; |
658 |
|
|
d = va[0]*va[0] + va[1]*va[1]; |
659 |
greg |
2.1 |
if (d <= FTINY) |
660 |
|
|
return(-1); |
661 |
greg |
2.10 |
bcm->tm[j][0] = va[0] /= d; |
662 |
|
|
bcm->tm[j][1] = va[1] /= d; |
663 |
|
|
bcm->tm[j][2] = -(v2[ax0]*va[0]+v2[ax1]*va[1]); |
664 |
greg |
2.1 |
/* rotate vertices */ |
665 |
|
|
vt = v1; |
666 |
|
|
v1 = v2; |
667 |
|
|
v2 = v3; |
668 |
|
|
v3 = vt; |
669 |
|
|
} |
670 |
|
|
return(0); |
671 |
|
|
} |
672 |
|
|
|
673 |
|
|
|
674 |
|
|
put_baryc(bcm) /* put barycentric coord. vectors */ |
675 |
greg |
2.10 |
register BARYCCM *bcm; |
676 |
greg |
2.1 |
{ |
677 |
greg |
2.10 |
printf("\t%d\n", bcm->ax); |
678 |
|
|
printf("%14.8f %14.8f %14.8f\n", |
679 |
|
|
bcm->tm[0][0], bcm->tm[0][1], bcm->tm[0][2]); |
680 |
|
|
printf("%14.8f %14.8f %14.8f\n", |
681 |
|
|
bcm->tm[1][0], bcm->tm[1][1], bcm->tm[1][2]); |
682 |
greg |
2.1 |
} |
683 |
|
|
|
684 |
|
|
|
685 |
|
|
freeverts() /* free all vertices */ |
686 |
|
|
{ |
687 |
|
|
if (nvs) { |
688 |
|
|
free((char *)vlist); |
689 |
|
|
nvs = 0; |
690 |
|
|
} |
691 |
|
|
if (nvts) { |
692 |
|
|
free((char *)vtlist); |
693 |
|
|
nvts = 0; |
694 |
|
|
} |
695 |
|
|
if (nvns) { |
696 |
|
|
free((char *)vnlist); |
697 |
|
|
nvns = 0; |
698 |
|
|
} |
699 |
|
|
} |
700 |
|
|
|
701 |
|
|
|
702 |
|
|
int |
703 |
|
|
newv(x, y, z) /* create a new vertex */ |
704 |
|
|
double x, y, z; |
705 |
|
|
{ |
706 |
|
|
if (!(nvs%CHUNKSIZ)) { /* allocate next block */ |
707 |
|
|
if (nvs == 0) |
708 |
|
|
vlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
709 |
|
|
else |
710 |
|
|
vlist = (FVECT *)realloc((char *)vlist, |
711 |
|
|
(nvs+CHUNKSIZ)*sizeof(FVECT)); |
712 |
|
|
if (vlist == NULL) { |
713 |
|
|
fprintf(stderr, |
714 |
|
|
"Out of memory while allocating vertex %d\n", nvs); |
715 |
|
|
exit(1); |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
/* assign new vertex */ |
719 |
|
|
vlist[nvs][0] = x; |
720 |
|
|
vlist[nvs][1] = y; |
721 |
|
|
vlist[nvs][2] = z; |
722 |
|
|
return(++nvs); |
723 |
|
|
} |
724 |
|
|
|
725 |
|
|
|
726 |
|
|
int |
727 |
|
|
newvn(x, y, z) /* create a new vertex normal */ |
728 |
|
|
double x, y, z; |
729 |
|
|
{ |
730 |
|
|
if (!(nvns%CHUNKSIZ)) { /* allocate next block */ |
731 |
|
|
if (nvns == 0) |
732 |
|
|
vnlist = (FVECT *)malloc(CHUNKSIZ*sizeof(FVECT)); |
733 |
|
|
else |
734 |
|
|
vnlist = (FVECT *)realloc((char *)vnlist, |
735 |
|
|
(nvns+CHUNKSIZ)*sizeof(FVECT)); |
736 |
|
|
if (vnlist == NULL) { |
737 |
|
|
fprintf(stderr, |
738 |
|
|
"Out of memory while allocating normal %d\n", nvns); |
739 |
|
|
exit(1); |
740 |
|
|
} |
741 |
|
|
} |
742 |
|
|
/* assign new normal */ |
743 |
|
|
vnlist[nvns][0] = x; |
744 |
|
|
vnlist[nvns][1] = y; |
745 |
|
|
vnlist[nvns][2] = z; |
746 |
|
|
if (normalize(vnlist[nvns]) == 0.0) |
747 |
|
|
return(0); |
748 |
|
|
return(++nvns); |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
|
752 |
|
|
int |
753 |
greg |
2.3 |
newvt(x, y) /* create a new texture map vertex */ |
754 |
greg |
2.1 |
double x, y; |
755 |
|
|
{ |
756 |
|
|
if (!(nvts%CHUNKSIZ)) { /* allocate next block */ |
757 |
|
|
if (nvts == 0) |
758 |
|
|
vtlist = (FLOAT (*)[2])malloc(CHUNKSIZ*2*sizeof(FLOAT)); |
759 |
|
|
else |
760 |
|
|
vtlist = (FLOAT (*)[2])realloc((char *)vtlist, |
761 |
|
|
(nvts+CHUNKSIZ)*2*sizeof(FLOAT)); |
762 |
|
|
if (vtlist == NULL) { |
763 |
|
|
fprintf(stderr, |
764 |
|
|
"Out of memory while allocating texture vertex %d\n", |
765 |
|
|
nvts); |
766 |
|
|
exit(1); |
767 |
|
|
} |
768 |
|
|
} |
769 |
greg |
2.3 |
/* assign new vertex */ |
770 |
greg |
2.1 |
vtlist[nvts][0] = x; |
771 |
|
|
vtlist[nvts][1] = y; |
772 |
|
|
return(++nvts); |
773 |
|
|
} |
774 |
|
|
|
775 |
|
|
|
776 |
greg |
2.6 |
syntax(er) /* report syntax error and exit */ |
777 |
greg |
2.1 |
char *er; |
778 |
|
|
{ |
779 |
|
|
fprintf(stderr, "%s: Wavefront syntax error near line %d: %s\n", |
780 |
greg |
2.6 |
inpfile, lineno, er); |
781 |
greg |
2.1 |
exit(1); |
782 |
|
|
} |