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root/radiance/ray/src/gen/replmarks.c
Revision: 2.7
Committed: Sun Jun 8 12:03:10 2003 UTC (20 years, 9 months ago) by schorsch
Content type: text/plain
Branch: MAIN
Changes since 2.6: +2 -1 lines
Log Message:
Reduced compile warnings/errors on Windows.

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2 greg 2.6 static const char RCSid[] = "$Id";
3 greg 1.1 #endif
4     /*
5     * Replace markers in Radiance scene description with objects or instances.
6     *
7     * Created: 17 Feb 1991 Greg Ward
8     */
9    
10 greg 2.5 #include <stdlib.h>
11 greg 1.1 #include <ctype.h>
12     #include <math.h>
13 schorsch 2.7 #include <stdio.h>
14 greg 1.1
15 schorsch 2.7 #include "platform.h"
16 greg 1.1 #include "fvect.h"
17    
18     #ifdef M_PI
19 gregl 2.4 #define PI ((double)M_PI)
20 greg 1.1 #else
21     #define PI 3.14159265358979323846
22     #endif
23    
24 greg 1.2 #define FEQ(a,b) ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7)
25    
26 greg 1.1 #define MAXVERT 6 /* maximum number of vertices for markers */
27 greg 2.2 #define MAXMARK 32 /* maximum number of markers */
28 greg 1.1
29     typedef struct {
30     short beg, end; /* beginning and ending vertex */
31     float len2; /* length squared */
32     } EDGE; /* a marker edge */
33    
34 greg 2.2 struct mrkr {
35     char *modout; /* output modifier */
36     double mscale; /* scale by this to get unit */
37     char *modin; /* input modifier indicating marker */
38     char *objname; /* output object file or octree */
39     int doxform; /* true if xform, false if instance */
40     } marker[MAXMARK]; /* array of markers */
41     int nmarkers = 0; /* number of markers */
42 greg 1.1
43 greg 2.2 int expand; /* expand commands? */
44 greg 1.1
45     char *progname;
46    
47    
48     main(argc, argv)
49     int argc;
50     char *argv[];
51     {
52     FILE *fp;
53     int i, j;
54    
55     progname = argv[0];
56 greg 2.2 i = 1;
57     while (i < argc && argv[i][0] == '-') {
58     do {
59     switch (argv[i][1]) {
60     case 'i':
61     marker[nmarkers].doxform = 0;
62     marker[nmarkers].objname = argv[++i];
63     break;
64     case 'x':
65     marker[nmarkers].doxform = 1;
66     marker[nmarkers].objname = argv[++i];
67     break;
68     case 'e':
69     expand = 1;
70     break;
71     case 'm':
72     marker[nmarkers].modout = argv[++i];
73     break;
74     case 's':
75     marker[nmarkers].mscale = atof(argv[++i]);
76     break;
77     default:
78     goto userr;
79     }
80     if (++i >= argc)
81     goto userr;
82     } while (argv[i][0] == '-');
83     if (marker[nmarkers].objname == NULL)
84     goto userr;
85     marker[nmarkers++].modin = argv[i++];
86     if (nmarkers >= MAXMARK)
87 greg 1.1 break;
88 greg 2.2 marker[nmarkers].mscale = marker[nmarkers-1].mscale;
89     }
90     if (nmarkers == 0)
91 greg 1.1 goto userr;
92     /* simple header */
93     putchar('#');
94     for (j = 0; j < i; j++) {
95     putchar(' ');
96     fputs(argv[j], stdout);
97     }
98     putchar('\n');
99     if (i == argc)
100     convert("<stdin>", stdin);
101     else
102     for ( ; i < argc; i++) {
103     if ((fp = fopen(argv[i], "r")) == NULL) {
104     perror(argv[i]);
105     exit(1);
106     }
107     convert(argv[i], fp);
108     fclose(fp);
109     }
110     exit(0);
111     userr:
112     fprintf(stderr,
113 greg 2.2 "Usage: %s [-e][-s size][-m modout] {-x objfile|-i octree} modname .. [file ..]\n",
114 greg 1.1 progname);
115     exit(1);
116     }
117    
118    
119     convert(name, fin) /* replace marks in a stream */
120     char *name;
121     register FILE *fin;
122     {
123     register int c;
124    
125     while ((c = getc(fin)) != EOF) {
126     if (isspace(c)) /* blank */
127     continue;
128     if (c == '#') { /* comment */
129     putchar(c);
130     do {
131     if ((c = getc(fin)) == EOF)
132     return;
133     putchar(c);
134     } while (c != '\n');
135     } else if (c == '!') { /* command */
136     ungetc(c, fin);
137     cvcomm(name, fin);
138     } else { /* object */
139     ungetc(c, fin);
140     cvobject(name, fin);
141     }
142     }
143     }
144    
145    
146     cvcomm(fname, fin) /* convert a command */
147     char *fname;
148     FILE *fin;
149     {
150     FILE *pin, *popen();
151     char buf[512], *fgetline();
152    
153     fgetline(buf, sizeof(buf), fin);
154     if (expand) {
155     if ((pin = popen(buf+1, "r")) == NULL) {
156     fprintf(stderr,
157     "%s: (%s): cannot execute \"%s\"\n",
158     progname, fname, buf);
159     exit(1);
160     }
161     convert(buf, pin);
162     pclose(pin);
163     } else
164     printf("\n%s\n", buf);
165     }
166    
167    
168     cvobject(fname, fin) /* convert an object */
169     char *fname;
170     FILE *fin;
171     {
172 greg 2.6 extern char *fgetword();
173 greg 1.1 char buf[128], typ[16], nam[128];
174 greg 2.2 int i, n;
175     register int j;
176 greg 1.1
177     if (fscanf(fin, "%s %s %s", buf, typ, nam) != 3)
178     goto readerr;
179 greg 2.2 if (!strcmp(typ, "polygon"))
180     for (j = 0; j < nmarkers; j++)
181     if (!strcmp(buf, marker[j].modin)) {
182     replace(fname, &marker[j], nam, fin);
183     return;
184     }
185 greg 1.1 printf("\n%s %s %s\n", buf, typ, nam);
186     if (!strcmp(typ, "alias")) { /* alias special case */
187     if (fscanf(fin, "%s", buf) != 1)
188     goto readerr;
189     printf("\t%s\n", buf);
190     return;
191     }
192     for (i = 0; i < 3; i++) { /* pass along arguments */
193     if (fscanf(fin, "%d", &n) != 1)
194     goto readerr;
195     printf("%d", n);
196     for (j = 0; j < n; j++) {
197 greg 2.5 if (fgetword(buf, sizeof(buf), fin) == NULL)
198 greg 1.1 goto readerr;
199     if (j%3 == 0)
200     putchar('\n');
201 greg 2.5 putchar('\t');
202     fputword(buf, stdout);
203 greg 1.1 }
204     putchar('\n');
205     }
206     return;
207     readerr:
208     fprintf(stderr, "%s: (%s): read error for %s \"%s\"\n",
209     progname, fname, typ, nam);
210     }
211    
212    
213 greg 2.2 replace(fname, m, mark, fin) /* replace marker */
214     char *fname;
215     register struct mrkr *m;
216     char *mark;
217 greg 1.1 FILE *fin;
218     {
219     int n;
220     char buf[256];
221    
222 greg 2.5 buf[0] = '\0'; /* bug fix thanks to schorsch */
223 greg 2.2 if (m->doxform) {
224 greg 1.1 sprintf(buf, "xform -e -n %s", mark);
225 greg 2.2 if (m->modout != NULL)
226     sprintf(buf+strlen(buf), " -m %s", m->modout);
227     if (buildxf(buf+strlen(buf), m->mscale, fin) < 0)
228 greg 1.1 goto badxf;
229 greg 2.2 sprintf(buf+strlen(buf), " %s", m->objname);
230 greg 1.1 if (expand) {
231     fflush(stdout);
232     system(buf);
233     } else
234     printf("\n!%s\n", buf);
235     } else {
236 greg 2.2 if ((n = buildxf(buf, m->mscale, fin)) < 0)
237 greg 1.1 goto badxf;
238 greg 2.2 printf("\n%s instance %s\n",
239     m->modout==NULL?"void":m->modout, mark);
240     printf("%d %s%s\n0\n0\n", n+1, m->objname, buf);
241 greg 1.1 }
242     return;
243     badxf:
244     fprintf(stderr, "%s: (%s): bad arguments for marker \"%s\"\n",
245     progname, fname, mark);
246     exit(1);
247     }
248    
249    
250     edgecmp(e1, e2) /* compare two edges, descending order */
251     EDGE *e1, *e2;
252     {
253     if (e1->len2 > e2->len2)
254     return(-1);
255     if (e1->len2 < e2->len2)
256     return(1);
257     return(0);
258     }
259    
260    
261     int
262 greg 2.2 buildxf(xf, markscale, fin) /* build transform for marker */
263 greg 2.5 register char *xf;
264 greg 2.2 double markscale;
265 greg 1.1 FILE *fin;
266     {
267     static FVECT vlist[MAXVERT];
268     static EDGE elist[MAXVERT];
269     FVECT xvec, yvec, zvec;
270     double xlen;
271     int n;
272     register int i;
273     /*
274     * Read and sort vectors: longest is hypotenuse,
275     * second longest is x' axis,
276     * third longest is y' axis (approximate),
277     * other vectors are ignored.
278     * It is an error if the x' and y' axes do
279     * not share a common vertex (their origin).
280     */
281     if (fscanf(fin, "%*d %*d %d", &n) != 1)
282     return(-1);
283     if (n%3 != 0)
284     return(-1);
285     n /= 3;
286     if (n < 3 || n > MAXVERT)
287     return(-1);
288     /* sort edges in descending order */
289     for (i = 0; i < n; i++) {
290     if (fscanf(fin, "%lf %lf %lf", &vlist[i][0],
291     &vlist[i][1], &vlist[i][2]) != 3)
292     return(-1);
293     if (i) {
294     elist[i].beg = i-1;
295     elist[i].end = i;
296     elist[i].len2 = dist2(vlist[i-1],vlist[i]);
297     }
298     }
299     elist[0].beg = n-1;
300     elist[0].end = 0;
301     elist[0].len2 = dist2(vlist[n-1],vlist[0]);
302     qsort(elist, n, sizeof(EDGE), edgecmp);
303     /* find x' and y' */
304     if (elist[1].end == elist[2].beg || elist[1].end == elist[2].end) {
305     i = elist[1].beg;
306     elist[1].beg = elist[1].end;
307     elist[1].end = i;
308     }
309     if (elist[2].end == elist[1].beg) {
310     i = elist[2].beg;
311     elist[2].beg = elist[2].end;
312     elist[2].end = i;
313     }
314     if (elist[1].beg != elist[2].beg)
315     return(-1); /* x' and y' not connected! */
316     for (i = 0; i < 3; i++) {
317     xvec[i] = vlist[elist[1].end][i] - vlist[elist[1].beg][i];
318     yvec[i] = vlist[elist[2].end][i] - vlist[elist[2].beg][i];
319     }
320     if ((xlen = normalize(xvec)) == 0.0)
321     return(-1);
322     fcross(zvec, xvec, yvec);
323     if (normalize(zvec) == 0.0)
324     return(-1);
325     fcross(yvec, zvec, xvec);
326     n = 0; /* start transformation... */
327     if (markscale > 0.0) { /* add scale factor */
328     sprintf(xf, " -s %f", xlen*markscale);
329     n += 2;
330 greg 2.5 while (*xf) ++xf;
331 greg 1.1 }
332     /* add rotation */
333     n += addrot(xf, xvec, yvec, zvec);
334 greg 2.5 while (*xf) ++xf;
335 greg 1.1 /* add translation */
336     n += 4;
337     sprintf(xf, " -t %f %f %f", vlist[elist[1].beg][0],
338     vlist[elist[1].beg][1], vlist[elist[1].beg][2]);
339     return(n); /* all done */
340     }
341    
342    
343     addrot(xf, xp, yp, zp) /* compute rotation (x,y,z) => (xp,yp,zp) */
344 greg 2.5 register char *xf;
345 greg 1.1 FVECT xp, yp, zp;
346     {
347 greg 1.2 int n;
348     double theta;
349 greg 1.1
350 greg 1.2 n = 0;
351     theta = atan2(yp[2], zp[2]);
352     if (!FEQ(theta,0.0)) {
353     sprintf(xf, " -rx %f", theta*(180./PI));
354 greg 2.5 while (*xf) ++xf;
355 greg 1.2 n += 2;
356     }
357     theta = asin(-xp[2]);
358     if (!FEQ(theta,0.0)) {
359     sprintf(xf, " -ry %f", theta*(180./PI));
360 greg 2.5 while (*xf) ++xf;
361 greg 1.2 n += 2;
362     }
363     theta = atan2(xp[1], xp[0]);
364     if (!FEQ(theta,0.0)) {
365     sprintf(xf, " -rz %f", theta*(180./PI));
366 greg 2.5 /* while (*xf) ++xf; */
367 greg 1.2 n += 2;
368     }
369     return(n);
370 greg 1.1 }