1 |
greg |
2.2 |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
greg |
1.1 |
|
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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* Replace markers in Radiance scene description with objects or instances. |
9 |
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* |
10 |
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* Created: 17 Feb 1991 Greg Ward |
11 |
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*/ |
12 |
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13 |
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#include <stdio.h> |
14 |
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#include <ctype.h> |
15 |
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#include <math.h> |
16 |
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17 |
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#include "fvect.h" |
18 |
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19 |
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#ifdef M_PI |
20 |
gregl |
2.4 |
#define PI ((double)M_PI) |
21 |
greg |
1.1 |
#else |
22 |
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#define PI 3.14159265358979323846 |
23 |
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#endif |
24 |
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25 |
greg |
1.2 |
#define FEQ(a,b) ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7) |
26 |
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27 |
greg |
1.1 |
#define MAXVERT 6 /* maximum number of vertices for markers */ |
28 |
greg |
2.2 |
#define MAXMARK 32 /* maximum number of markers */ |
29 |
greg |
1.1 |
|
30 |
greg |
2.3 |
#ifdef DCL_ATOF |
31 |
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extern double atof(); |
32 |
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#endif |
33 |
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34 |
greg |
1.1 |
typedef struct { |
35 |
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short beg, end; /* beginning and ending vertex */ |
36 |
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float len2; /* length squared */ |
37 |
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} EDGE; /* a marker edge */ |
38 |
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39 |
greg |
2.2 |
struct mrkr { |
40 |
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char *modout; /* output modifier */ |
41 |
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double mscale; /* scale by this to get unit */ |
42 |
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char *modin; /* input modifier indicating marker */ |
43 |
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char *objname; /* output object file or octree */ |
44 |
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int doxform; /* true if xform, false if instance */ |
45 |
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} marker[MAXMARK]; /* array of markers */ |
46 |
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int nmarkers = 0; /* number of markers */ |
47 |
greg |
1.1 |
|
48 |
greg |
2.2 |
int expand; /* expand commands? */ |
49 |
greg |
1.1 |
|
50 |
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char *progname; |
51 |
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52 |
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53 |
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main(argc, argv) |
54 |
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int argc; |
55 |
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char *argv[]; |
56 |
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{ |
57 |
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FILE *fp; |
58 |
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int i, j; |
59 |
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60 |
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progname = argv[0]; |
61 |
greg |
2.2 |
i = 1; |
62 |
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while (i < argc && argv[i][0] == '-') { |
63 |
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do { |
64 |
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switch (argv[i][1]) { |
65 |
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case 'i': |
66 |
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marker[nmarkers].doxform = 0; |
67 |
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marker[nmarkers].objname = argv[++i]; |
68 |
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break; |
69 |
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case 'x': |
70 |
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marker[nmarkers].doxform = 1; |
71 |
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marker[nmarkers].objname = argv[++i]; |
72 |
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break; |
73 |
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case 'e': |
74 |
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expand = 1; |
75 |
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break; |
76 |
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case 'm': |
77 |
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marker[nmarkers].modout = argv[++i]; |
78 |
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break; |
79 |
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case 's': |
80 |
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marker[nmarkers].mscale = atof(argv[++i]); |
81 |
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break; |
82 |
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default: |
83 |
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goto userr; |
84 |
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} |
85 |
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if (++i >= argc) |
86 |
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goto userr; |
87 |
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} while (argv[i][0] == '-'); |
88 |
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if (marker[nmarkers].objname == NULL) |
89 |
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goto userr; |
90 |
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marker[nmarkers++].modin = argv[i++]; |
91 |
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if (nmarkers >= MAXMARK) |
92 |
greg |
1.1 |
break; |
93 |
greg |
2.2 |
marker[nmarkers].mscale = marker[nmarkers-1].mscale; |
94 |
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} |
95 |
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if (nmarkers == 0) |
96 |
greg |
1.1 |
goto userr; |
97 |
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/* simple header */ |
98 |
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putchar('#'); |
99 |
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for (j = 0; j < i; j++) { |
100 |
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putchar(' '); |
101 |
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fputs(argv[j], stdout); |
102 |
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} |
103 |
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putchar('\n'); |
104 |
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if (i == argc) |
105 |
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convert("<stdin>", stdin); |
106 |
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else |
107 |
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for ( ; i < argc; i++) { |
108 |
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if ((fp = fopen(argv[i], "r")) == NULL) { |
109 |
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perror(argv[i]); |
110 |
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exit(1); |
111 |
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} |
112 |
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convert(argv[i], fp); |
113 |
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fclose(fp); |
114 |
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} |
115 |
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exit(0); |
116 |
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userr: |
117 |
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fprintf(stderr, |
118 |
greg |
2.2 |
"Usage: %s [-e][-s size][-m modout] {-x objfile|-i octree} modname .. [file ..]\n", |
119 |
greg |
1.1 |
progname); |
120 |
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exit(1); |
121 |
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} |
122 |
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123 |
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124 |
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convert(name, fin) /* replace marks in a stream */ |
125 |
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char *name; |
126 |
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register FILE *fin; |
127 |
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{ |
128 |
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register int c; |
129 |
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130 |
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while ((c = getc(fin)) != EOF) { |
131 |
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if (isspace(c)) /* blank */ |
132 |
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continue; |
133 |
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if (c == '#') { /* comment */ |
134 |
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putchar(c); |
135 |
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do { |
136 |
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if ((c = getc(fin)) == EOF) |
137 |
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return; |
138 |
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putchar(c); |
139 |
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} while (c != '\n'); |
140 |
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} else if (c == '!') { /* command */ |
141 |
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ungetc(c, fin); |
142 |
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cvcomm(name, fin); |
143 |
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} else { /* object */ |
144 |
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ungetc(c, fin); |
145 |
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cvobject(name, fin); |
146 |
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} |
147 |
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} |
148 |
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} |
149 |
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150 |
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151 |
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cvcomm(fname, fin) /* convert a command */ |
152 |
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char *fname; |
153 |
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FILE *fin; |
154 |
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{ |
155 |
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FILE *pin, *popen(); |
156 |
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char buf[512], *fgetline(); |
157 |
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158 |
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fgetline(buf, sizeof(buf), fin); |
159 |
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if (expand) { |
160 |
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if ((pin = popen(buf+1, "r")) == NULL) { |
161 |
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fprintf(stderr, |
162 |
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"%s: (%s): cannot execute \"%s\"\n", |
163 |
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progname, fname, buf); |
164 |
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exit(1); |
165 |
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} |
166 |
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convert(buf, pin); |
167 |
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pclose(pin); |
168 |
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} else |
169 |
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printf("\n%s\n", buf); |
170 |
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} |
171 |
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172 |
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173 |
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cvobject(fname, fin) /* convert an object */ |
174 |
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char *fname; |
175 |
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FILE *fin; |
176 |
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{ |
177 |
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char buf[128], typ[16], nam[128]; |
178 |
greg |
2.2 |
int i, n; |
179 |
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register int j; |
180 |
greg |
1.1 |
|
181 |
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if (fscanf(fin, "%s %s %s", buf, typ, nam) != 3) |
182 |
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goto readerr; |
183 |
greg |
2.2 |
if (!strcmp(typ, "polygon")) |
184 |
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for (j = 0; j < nmarkers; j++) |
185 |
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if (!strcmp(buf, marker[j].modin)) { |
186 |
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replace(fname, &marker[j], nam, fin); |
187 |
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return; |
188 |
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} |
189 |
greg |
1.1 |
printf("\n%s %s %s\n", buf, typ, nam); |
190 |
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if (!strcmp(typ, "alias")) { /* alias special case */ |
191 |
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if (fscanf(fin, "%s", buf) != 1) |
192 |
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goto readerr; |
193 |
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printf("\t%s\n", buf); |
194 |
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return; |
195 |
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} |
196 |
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for (i = 0; i < 3; i++) { /* pass along arguments */ |
197 |
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if (fscanf(fin, "%d", &n) != 1) |
198 |
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goto readerr; |
199 |
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printf("%d", n); |
200 |
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for (j = 0; j < n; j++) { |
201 |
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if (fscanf(fin, "%s", buf) != 1) |
202 |
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goto readerr; |
203 |
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if (j%3 == 0) |
204 |
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putchar('\n'); |
205 |
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printf("\t%s", buf); |
206 |
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} |
207 |
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putchar('\n'); |
208 |
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} |
209 |
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return; |
210 |
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readerr: |
211 |
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fprintf(stderr, "%s: (%s): read error for %s \"%s\"\n", |
212 |
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progname, fname, typ, nam); |
213 |
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} |
214 |
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215 |
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216 |
greg |
2.2 |
replace(fname, m, mark, fin) /* replace marker */ |
217 |
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char *fname; |
218 |
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register struct mrkr *m; |
219 |
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char *mark; |
220 |
greg |
1.1 |
FILE *fin; |
221 |
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{ |
222 |
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int n; |
223 |
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char buf[256]; |
224 |
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|
225 |
greg |
2.2 |
if (m->doxform) { |
226 |
greg |
1.1 |
sprintf(buf, "xform -e -n %s", mark); |
227 |
greg |
2.2 |
if (m->modout != NULL) |
228 |
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sprintf(buf+strlen(buf), " -m %s", m->modout); |
229 |
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if (buildxf(buf+strlen(buf), m->mscale, fin) < 0) |
230 |
greg |
1.1 |
goto badxf; |
231 |
greg |
2.2 |
sprintf(buf+strlen(buf), " %s", m->objname); |
232 |
greg |
1.1 |
if (expand) { |
233 |
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fflush(stdout); |
234 |
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system(buf); |
235 |
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} else |
236 |
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printf("\n!%s\n", buf); |
237 |
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} else { |
238 |
greg |
2.2 |
if ((n = buildxf(buf, m->mscale, fin)) < 0) |
239 |
greg |
1.1 |
goto badxf; |
240 |
greg |
2.2 |
printf("\n%s instance %s\n", |
241 |
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m->modout==NULL?"void":m->modout, mark); |
242 |
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printf("%d %s%s\n0\n0\n", n+1, m->objname, buf); |
243 |
greg |
1.1 |
} |
244 |
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return; |
245 |
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badxf: |
246 |
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fprintf(stderr, "%s: (%s): bad arguments for marker \"%s\"\n", |
247 |
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progname, fname, mark); |
248 |
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exit(1); |
249 |
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} |
250 |
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251 |
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252 |
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edgecmp(e1, e2) /* compare two edges, descending order */ |
253 |
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EDGE *e1, *e2; |
254 |
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{ |
255 |
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if (e1->len2 > e2->len2) |
256 |
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return(-1); |
257 |
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if (e1->len2 < e2->len2) |
258 |
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return(1); |
259 |
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return(0); |
260 |
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} |
261 |
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262 |
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263 |
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int |
264 |
greg |
2.2 |
buildxf(xf, markscale, fin) /* build transform for marker */ |
265 |
greg |
1.1 |
char *xf; |
266 |
greg |
2.2 |
double markscale; |
267 |
greg |
1.1 |
FILE *fin; |
268 |
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{ |
269 |
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static FVECT vlist[MAXVERT]; |
270 |
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static EDGE elist[MAXVERT]; |
271 |
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FVECT xvec, yvec, zvec; |
272 |
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double xlen; |
273 |
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int n; |
274 |
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register int i; |
275 |
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/* |
276 |
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* Read and sort vectors: longest is hypotenuse, |
277 |
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* second longest is x' axis, |
278 |
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* third longest is y' axis (approximate), |
279 |
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* other vectors are ignored. |
280 |
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* It is an error if the x' and y' axes do |
281 |
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* not share a common vertex (their origin). |
282 |
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*/ |
283 |
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if (fscanf(fin, "%*d %*d %d", &n) != 1) |
284 |
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return(-1); |
285 |
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if (n%3 != 0) |
286 |
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return(-1); |
287 |
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n /= 3; |
288 |
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if (n < 3 || n > MAXVERT) |
289 |
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return(-1); |
290 |
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/* sort edges in descending order */ |
291 |
|
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for (i = 0; i < n; i++) { |
292 |
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if (fscanf(fin, "%lf %lf %lf", &vlist[i][0], |
293 |
|
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&vlist[i][1], &vlist[i][2]) != 3) |
294 |
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return(-1); |
295 |
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if (i) { |
296 |
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elist[i].beg = i-1; |
297 |
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elist[i].end = i; |
298 |
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elist[i].len2 = dist2(vlist[i-1],vlist[i]); |
299 |
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} |
300 |
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} |
301 |
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elist[0].beg = n-1; |
302 |
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elist[0].end = 0; |
303 |
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elist[0].len2 = dist2(vlist[n-1],vlist[0]); |
304 |
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qsort(elist, n, sizeof(EDGE), edgecmp); |
305 |
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/* find x' and y' */ |
306 |
|
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if (elist[1].end == elist[2].beg || elist[1].end == elist[2].end) { |
307 |
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i = elist[1].beg; |
308 |
|
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elist[1].beg = elist[1].end; |
309 |
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elist[1].end = i; |
310 |
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} |
311 |
|
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if (elist[2].end == elist[1].beg) { |
312 |
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i = elist[2].beg; |
313 |
|
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elist[2].beg = elist[2].end; |
314 |
|
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elist[2].end = i; |
315 |
|
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} |
316 |
|
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if (elist[1].beg != elist[2].beg) |
317 |
|
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return(-1); /* x' and y' not connected! */ |
318 |
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for (i = 0; i < 3; i++) { |
319 |
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xvec[i] = vlist[elist[1].end][i] - vlist[elist[1].beg][i]; |
320 |
|
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yvec[i] = vlist[elist[2].end][i] - vlist[elist[2].beg][i]; |
321 |
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} |
322 |
|
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if ((xlen = normalize(xvec)) == 0.0) |
323 |
|
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return(-1); |
324 |
|
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fcross(zvec, xvec, yvec); |
325 |
|
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if (normalize(zvec) == 0.0) |
326 |
|
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return(-1); |
327 |
|
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fcross(yvec, zvec, xvec); |
328 |
|
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n = 0; /* start transformation... */ |
329 |
|
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if (markscale > 0.0) { /* add scale factor */ |
330 |
|
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sprintf(xf, " -s %f", xlen*markscale); |
331 |
|
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n += 2; |
332 |
|
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xf += strlen(xf); |
333 |
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} |
334 |
|
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/* add rotation */ |
335 |
|
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n += addrot(xf, xvec, yvec, zvec); |
336 |
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xf += strlen(xf); |
337 |
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/* add translation */ |
338 |
|
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n += 4; |
339 |
|
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sprintf(xf, " -t %f %f %f", vlist[elist[1].beg][0], |
340 |
|
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vlist[elist[1].beg][1], vlist[elist[1].beg][2]); |
341 |
|
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return(n); /* all done */ |
342 |
|
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} |
343 |
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|
344 |
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|
345 |
|
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addrot(xf, xp, yp, zp) /* compute rotation (x,y,z) => (xp,yp,zp) */ |
346 |
|
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char *xf; |
347 |
|
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FVECT xp, yp, zp; |
348 |
|
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{ |
349 |
greg |
1.2 |
int n; |
350 |
|
|
double theta; |
351 |
greg |
1.1 |
|
352 |
greg |
1.2 |
n = 0; |
353 |
|
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theta = atan2(yp[2], zp[2]); |
354 |
|
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if (!FEQ(theta,0.0)) { |
355 |
|
|
sprintf(xf, " -rx %f", theta*(180./PI)); |
356 |
|
|
xf += strlen(xf); |
357 |
|
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n += 2; |
358 |
|
|
} |
359 |
|
|
theta = asin(-xp[2]); |
360 |
|
|
if (!FEQ(theta,0.0)) { |
361 |
|
|
sprintf(xf, " -ry %f", theta*(180./PI)); |
362 |
|
|
xf += strlen(xf); |
363 |
|
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n += 2; |
364 |
|
|
} |
365 |
|
|
theta = atan2(xp[1], xp[0]); |
366 |
|
|
if (!FEQ(theta,0.0)) { |
367 |
|
|
sprintf(xf, " -rz %f", theta*(180./PI)); |
368 |
|
|
/* xf += strlen(xf); */ |
369 |
|
|
n += 2; |
370 |
|
|
} |
371 |
|
|
return(n); |
372 |
greg |
1.1 |
} |