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root/radiance/ray/src/gen/replmarks.c
Revision: 2.12
Committed: Tue Sep 28 17:54:18 2004 UTC (19 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R6, rad3R6P1
Changes since 2.11: +1 -1 lines
Log Message:
Fixed messed-up RCCS Id at top of file

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2 greg 2.12 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 schorsch 2.9 #include "rtio.h"
17 schorsch 2.8 #include "rtprocess.h"
18 greg 1.1 #include "fvect.h"
19    
20     #ifdef M_PI
21 gregl 2.4 #define PI ((double)M_PI)
22 greg 1.1 #else
23     #define PI 3.14159265358979323846
24     #endif
25    
26 greg 1.2 #define FEQ(a,b) ((a)-(b) <= 1e-7 && (b)-(a) <= 1e-7)
27    
28 greg 1.1 #define MAXVERT 6 /* maximum number of vertices for markers */
29 greg 2.2 #define MAXMARK 32 /* maximum number of markers */
30 greg 1.1
31 greg 2.11 #define USE_XFORM 1 /* use !xform inline command */
32     #define USE_INSTANCE 2 /* use instance primitive */
33     #define USE_MESH 3 /* use mesh primitive */
34    
35 greg 1.1 typedef struct {
36     short beg, end; /* beginning and ending vertex */
37     float len2; /* length squared */
38     } EDGE; /* a marker edge */
39    
40 greg 2.2 struct mrkr {
41     char *modout; /* output modifier */
42     double mscale; /* scale by this to get unit */
43     char *modin; /* input modifier indicating marker */
44     char *objname; /* output object file or octree */
45 greg 2.11 int usetype; /* one of USE_* above */
46 greg 2.2 } marker[MAXMARK]; /* array of markers */
47     int nmarkers = 0; /* number of markers */
48 greg 1.1
49 greg 2.2 int expand; /* expand commands? */
50 greg 1.1
51     char *progname;
52    
53 schorsch 2.9 static void convert(char *name, FILE *fin);
54     static void cvcomm(char *fname, FILE *fin);
55     static void cvobject(char *fname, FILE *fin);
56     static void replace(char *fname, struct mrkr *m, char *mark, FILE *fin);
57     static int edgecmp(const void *e1, const void *e2);
58     static int buildxf(char *xf, double markscale, FILE *fin);
59     static int addrot(char *xf, FVECT xp, FVECT yp, FVECT zp);
60 greg 1.1
61 schorsch 2.9
62     int
63     main(
64     int argc,
65     char *argv[]
66     )
67 greg 1.1 {
68     FILE *fp;
69     int i, j;
70    
71     progname = argv[0];
72 greg 2.2 i = 1;
73     while (i < argc && argv[i][0] == '-') {
74     do {
75     switch (argv[i][1]) {
76     case 'i':
77 greg 2.11 marker[nmarkers].usetype = USE_INSTANCE;
78     marker[nmarkers].objname = argv[++i];
79     break;
80     case 'I':
81     marker[nmarkers].usetype = USE_MESH;
82 greg 2.2 marker[nmarkers].objname = argv[++i];
83     break;
84     case 'x':
85 greg 2.11 marker[nmarkers].usetype = USE_XFORM;
86 greg 2.2 marker[nmarkers].objname = argv[++i];
87     break;
88     case 'e':
89     expand = 1;
90     break;
91     case 'm':
92     marker[nmarkers].modout = argv[++i];
93     break;
94     case 's':
95     marker[nmarkers].mscale = atof(argv[++i]);
96     break;
97     default:
98     goto userr;
99     }
100     if (++i >= argc)
101     goto userr;
102     } while (argv[i][0] == '-');
103     if (marker[nmarkers].objname == NULL)
104     goto userr;
105     marker[nmarkers++].modin = argv[i++];
106     if (nmarkers >= MAXMARK)
107 greg 1.1 break;
108 greg 2.2 marker[nmarkers].mscale = marker[nmarkers-1].mscale;
109     }
110     if (nmarkers == 0)
111 greg 1.1 goto userr;
112     /* simple header */
113     putchar('#');
114     for (j = 0; j < i; j++) {
115     putchar(' ');
116     fputs(argv[j], stdout);
117     }
118     putchar('\n');
119     if (i == argc)
120     convert("<stdin>", stdin);
121     else
122     for ( ; i < argc; i++) {
123     if ((fp = fopen(argv[i], "r")) == NULL) {
124     perror(argv[i]);
125     exit(1);
126     }
127     convert(argv[i], fp);
128     fclose(fp);
129     }
130 schorsch 2.9 return 0;
131 greg 1.1 userr:
132     fprintf(stderr,
133 greg 2.11 "Usage: %s [-e][-s size][-m modout] {-x objfile|-i octree|-I mesh} modname .. [file ..]\n",
134 greg 1.1 progname);
135 schorsch 2.9 return 1;
136 greg 1.1 }
137    
138    
139 schorsch 2.9 void
140     convert( /* replace marks in a stream */
141     char *name,
142     register FILE *fin
143     )
144 greg 1.1 {
145     register int c;
146    
147     while ((c = getc(fin)) != EOF) {
148     if (isspace(c)) /* blank */
149     continue;
150     if (c == '#') { /* comment */
151     putchar(c);
152     do {
153     if ((c = getc(fin)) == EOF)
154     return;
155     putchar(c);
156     } while (c != '\n');
157     } else if (c == '!') { /* command */
158     ungetc(c, fin);
159     cvcomm(name, fin);
160     } else { /* object */
161     ungetc(c, fin);
162     cvobject(name, fin);
163     }
164     }
165     }
166    
167    
168 schorsch 2.9 void
169     cvcomm( /* convert a command */
170     char *fname,
171     FILE *fin
172     )
173 greg 1.1 {
174 schorsch 2.8 FILE *pin;
175 greg 1.1 char buf[512], *fgetline();
176    
177     fgetline(buf, sizeof(buf), fin);
178     if (expand) {
179     if ((pin = popen(buf+1, "r")) == NULL) {
180     fprintf(stderr,
181     "%s: (%s): cannot execute \"%s\"\n",
182     progname, fname, buf);
183     exit(1);
184     }
185     convert(buf, pin);
186     pclose(pin);
187     } else
188     printf("\n%s\n", buf);
189     }
190    
191    
192 schorsch 2.9 void
193     cvobject( /* convert an object */
194     char *fname,
195     FILE *fin
196     )
197 greg 1.1 {
198 greg 2.6 extern char *fgetword();
199 greg 1.1 char buf[128], typ[16], nam[128];
200 greg 2.2 int i, n;
201     register int j;
202 greg 1.1
203     if (fscanf(fin, "%s %s %s", buf, typ, nam) != 3)
204     goto readerr;
205 greg 2.2 if (!strcmp(typ, "polygon"))
206     for (j = 0; j < nmarkers; j++)
207     if (!strcmp(buf, marker[j].modin)) {
208     replace(fname, &marker[j], nam, fin);
209     return;
210     }
211 greg 1.1 printf("\n%s %s %s\n", buf, typ, nam);
212     if (!strcmp(typ, "alias")) { /* alias special case */
213     if (fscanf(fin, "%s", buf) != 1)
214     goto readerr;
215     printf("\t%s\n", buf);
216     return;
217     }
218     for (i = 0; i < 3; i++) { /* pass along arguments */
219     if (fscanf(fin, "%d", &n) != 1)
220     goto readerr;
221     printf("%d", n);
222     for (j = 0; j < n; j++) {
223 greg 2.5 if (fgetword(buf, sizeof(buf), fin) == NULL)
224 greg 1.1 goto readerr;
225     if (j%3 == 0)
226     putchar('\n');
227 greg 2.5 putchar('\t');
228     fputword(buf, stdout);
229 greg 1.1 }
230     putchar('\n');
231     }
232     return;
233     readerr:
234     fprintf(stderr, "%s: (%s): read error for %s \"%s\"\n",
235     progname, fname, typ, nam);
236     }
237    
238    
239 schorsch 2.9 void
240     replace( /* replace marker */
241     char *fname,
242     register struct mrkr *m,
243     char *mark,
244     FILE *fin
245     )
246 greg 1.1 {
247     int n;
248     char buf[256];
249    
250 greg 2.5 buf[0] = '\0'; /* bug fix thanks to schorsch */
251 greg 2.11 if (m->usetype == USE_XFORM) {
252 greg 2.10 sprintf(buf, "xform -n %s", mark);
253 greg 2.2 if (m->modout != NULL)
254     sprintf(buf+strlen(buf), " -m %s", m->modout);
255     if (buildxf(buf+strlen(buf), m->mscale, fin) < 0)
256 greg 1.1 goto badxf;
257 greg 2.2 sprintf(buf+strlen(buf), " %s", m->objname);
258 greg 1.1 if (expand) {
259     fflush(stdout);
260     system(buf);
261     } else
262     printf("\n!%s\n", buf);
263     } else {
264 greg 2.2 if ((n = buildxf(buf, m->mscale, fin)) < 0)
265 greg 1.1 goto badxf;
266 greg 2.11 printf("\n%s %s %s\n",
267     m->modout==NULL?"void":m->modout,
268     m->usetype==USE_INSTANCE?"instance":"mesh",
269     mark);
270 greg 2.2 printf("%d %s%s\n0\n0\n", n+1, m->objname, buf);
271 greg 1.1 }
272     return;
273     badxf:
274     fprintf(stderr, "%s: (%s): bad arguments for marker \"%s\"\n",
275     progname, fname, mark);
276     exit(1);
277     }
278    
279    
280 schorsch 2.9 int
281     edgecmp( /* compare two edges, descending order */
282     const void *e1,
283     const void *e2
284     )
285 greg 1.1 {
286 schorsch 2.9 if (((EDGE*)e1)->len2 > ((EDGE*)e2)->len2)
287 greg 1.1 return(-1);
288 schorsch 2.9 if (((EDGE*)e1)->len2 < ((EDGE*)e2)->len2)
289 greg 1.1 return(1);
290     return(0);
291     }
292    
293    
294     int
295 schorsch 2.9 buildxf( /* build transform for marker */
296     register char *xf,
297     double markscale,
298     FILE *fin
299     )
300 greg 1.1 {
301     static FVECT vlist[MAXVERT];
302     static EDGE elist[MAXVERT];
303     FVECT xvec, yvec, zvec;
304     double xlen;
305     int n;
306     register int i;
307     /*
308     * Read and sort vectors: longest is hypotenuse,
309     * second longest is x' axis,
310     * third longest is y' axis (approximate),
311     * other vectors are ignored.
312     * It is an error if the x' and y' axes do
313     * not share a common vertex (their origin).
314     */
315     if (fscanf(fin, "%*d %*d %d", &n) != 1)
316     return(-1);
317     if (n%3 != 0)
318     return(-1);
319     n /= 3;
320     if (n < 3 || n > MAXVERT)
321     return(-1);
322     /* sort edges in descending order */
323     for (i = 0; i < n; i++) {
324     if (fscanf(fin, "%lf %lf %lf", &vlist[i][0],
325     &vlist[i][1], &vlist[i][2]) != 3)
326     return(-1);
327     if (i) {
328     elist[i].beg = i-1;
329     elist[i].end = i;
330     elist[i].len2 = dist2(vlist[i-1],vlist[i]);
331     }
332     }
333     elist[0].beg = n-1;
334     elist[0].end = 0;
335     elist[0].len2 = dist2(vlist[n-1],vlist[0]);
336     qsort(elist, n, sizeof(EDGE), edgecmp);
337     /* find x' and y' */
338     if (elist[1].end == elist[2].beg || elist[1].end == elist[2].end) {
339     i = elist[1].beg;
340     elist[1].beg = elist[1].end;
341     elist[1].end = i;
342     }
343     if (elist[2].end == elist[1].beg) {
344     i = elist[2].beg;
345     elist[2].beg = elist[2].end;
346     elist[2].end = i;
347     }
348     if (elist[1].beg != elist[2].beg)
349     return(-1); /* x' and y' not connected! */
350     for (i = 0; i < 3; i++) {
351     xvec[i] = vlist[elist[1].end][i] - vlist[elist[1].beg][i];
352     yvec[i] = vlist[elist[2].end][i] - vlist[elist[2].beg][i];
353     }
354     if ((xlen = normalize(xvec)) == 0.0)
355     return(-1);
356     fcross(zvec, xvec, yvec);
357     if (normalize(zvec) == 0.0)
358     return(-1);
359     fcross(yvec, zvec, xvec);
360     n = 0; /* start transformation... */
361     if (markscale > 0.0) { /* add scale factor */
362     sprintf(xf, " -s %f", xlen*markscale);
363     n += 2;
364 greg 2.5 while (*xf) ++xf;
365 greg 1.1 }
366     /* add rotation */
367     n += addrot(xf, xvec, yvec, zvec);
368 greg 2.5 while (*xf) ++xf;
369 greg 1.1 /* add translation */
370     n += 4;
371     sprintf(xf, " -t %f %f %f", vlist[elist[1].beg][0],
372     vlist[elist[1].beg][1], vlist[elist[1].beg][2]);
373     return(n); /* all done */
374     }
375    
376    
377 schorsch 2.9 int
378     addrot( /* compute rotation (x,y,z) => (xp,yp,zp) */
379     register char *xf,
380     FVECT xp,
381     FVECT yp,
382     FVECT zp
383     )
384 greg 1.1 {
385 greg 1.2 int n;
386     double theta;
387 greg 1.1
388 greg 1.2 n = 0;
389     theta = atan2(yp[2], zp[2]);
390     if (!FEQ(theta,0.0)) {
391     sprintf(xf, " -rx %f", theta*(180./PI));
392 greg 2.5 while (*xf) ++xf;
393 greg 1.2 n += 2;
394     }
395     theta = asin(-xp[2]);
396     if (!FEQ(theta,0.0)) {
397     sprintf(xf, " -ry %f", theta*(180./PI));
398 greg 2.5 while (*xf) ++xf;
399 greg 1.2 n += 2;
400     }
401     theta = atan2(xp[1], xp[0]);
402     if (!FEQ(theta,0.0)) {
403     sprintf(xf, " -rz %f", theta*(180./PI));
404 greg 2.5 /* while (*xf) ++xf; */
405 greg 1.2 n += 2;
406     }
407     return(n);
408 greg 1.1 }