1 |
greg |
1.1 |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
|
|
|
3 |
|
|
#ifndef lint |
4 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
5 |
|
|
#endif |
6 |
|
|
|
7 |
|
|
/* |
8 |
|
|
* makedist.c - program to make a source distribution. |
9 |
|
|
* |
10 |
|
|
* 8/18/86 |
11 |
|
|
* |
12 |
|
|
* Program uses angular coordinates as follows: |
13 |
|
|
* |
14 |
|
|
* alpha - degrees measured from x1 axis. |
15 |
|
|
* beta - degress of projection into x2x3 plane, |
16 |
|
|
* measured from x2 axis towards x3 axis. |
17 |
|
|
* |
18 |
|
|
* Default axes are (x1,x2,x3) = (x,y,z). |
19 |
|
|
*/ |
20 |
|
|
|
21 |
|
|
#include <stdio.h> |
22 |
|
|
|
23 |
|
|
#include "random.h" |
24 |
|
|
|
25 |
greg |
1.2 |
#include "setscan.h" |
26 |
greg |
1.1 |
|
27 |
greg |
1.3 |
#ifndef BSD |
28 |
|
|
#define vfork fork |
29 |
|
|
#endif |
30 |
greg |
1.1 |
|
31 |
|
|
#define FTINY 1e-7 |
32 |
|
|
|
33 |
|
|
#define PI 3.14159265358979324 |
34 |
|
|
|
35 |
|
|
#define atorad(a) ((PI/180.0) * (a)) |
36 |
|
|
|
37 |
|
|
char *rtargv[128] = {"rtrace", "-h"}; |
38 |
|
|
int rtargc = 2; |
39 |
|
|
|
40 |
|
|
#define passarg(s) (rtargv[rtargc++] = s) |
41 |
|
|
|
42 |
greg |
2.3 |
#ifdef DCL_ATOF |
43 |
|
|
extern double atof(); |
44 |
|
|
#endif |
45 |
greg |
1.1 |
/* default angles */ |
46 |
|
|
ANGLE alpha[181] = {10, 25, 40, 55, 70, 85, AEND}; |
47 |
|
|
ANGLE beta[361] = {0,30,60,90,120,150,180,210,240,270,300,330,AEND}; |
48 |
|
|
|
49 |
|
|
/* coordinate system */ |
50 |
|
|
double axis[3][3] = {{1,0,0},{0,1,0},{0,0,1}}; |
51 |
|
|
|
52 |
|
|
double targetw = 1.0; /* target width */ |
53 |
|
|
double targeth = 1.0; /* target height */ |
54 |
|
|
double targetd = 1.0; /* target distance */ |
55 |
|
|
double targetp[3] = {0,0,0}; /* target center */ |
56 |
|
|
int xres = 16; /* x sample resolution */ |
57 |
|
|
int yres = 16; /* y sample resolution */ |
58 |
|
|
|
59 |
|
|
int userformat = 1; /* output 1=nice,0=plain,-1=raw */ |
60 |
|
|
int header = 1; /* print header? */ |
61 |
|
|
|
62 |
|
|
char *progname; /* program name */ |
63 |
|
|
|
64 |
|
|
|
65 |
|
|
main(argc, argv) |
66 |
|
|
int argc; |
67 |
|
|
char *argv[]; |
68 |
|
|
{ |
69 |
|
|
int i; |
70 |
|
|
|
71 |
|
|
progname = argv[0]; |
72 |
|
|
|
73 |
|
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
74 |
|
|
switch (argv[i][1]) { |
75 |
|
|
case 't': /* target */ |
76 |
|
|
switch (argv[i][2]) { |
77 |
|
|
case 'w': /* width */ |
78 |
|
|
targetw = atof(argv[++i]); |
79 |
|
|
break; |
80 |
|
|
case 'h': /* height */ |
81 |
|
|
targeth = atof(argv[++i]); |
82 |
|
|
break; |
83 |
|
|
case 'd': /* distance */ |
84 |
|
|
targetd = atof(argv[++i]); |
85 |
|
|
break; |
86 |
|
|
case 'c': /* center */ |
87 |
|
|
targetp[0] = atof(argv[++i]); |
88 |
|
|
targetp[1] = atof(argv[++i]); |
89 |
|
|
targetp[2] = atof(argv[++i]); |
90 |
|
|
break; |
91 |
|
|
default: |
92 |
|
|
goto badopt; |
93 |
|
|
} |
94 |
|
|
break; |
95 |
|
|
case 'a': |
96 |
|
|
if (!strcmp(argv[i], "-alpha")) { |
97 |
|
|
if (setscan(alpha, argv[++i]) < 0) { |
98 |
|
|
fprintf(stderr, |
99 |
|
|
"%s: bad alpha spec: %s\n", |
100 |
|
|
progname, argv[i]); |
101 |
|
|
exit(1); |
102 |
|
|
} |
103 |
|
|
} else |
104 |
|
|
switch (argv[i][2]) { |
105 |
|
|
case 'd': /* ambient divisions */ |
106 |
|
|
case 's': /* ambient samples */ |
107 |
|
|
case 'r': /* ambient resolution */ |
108 |
|
|
case 'a': /* ambient accuracy */ |
109 |
|
|
case 'b': /* ambient bounces */ |
110 |
|
|
case 'i': /* include */ |
111 |
|
|
case 'e': /* exclude */ |
112 |
|
|
case 'f': /* file */ |
113 |
|
|
passarg(argv[i]); |
114 |
|
|
passarg(argv[++i]); |
115 |
|
|
break; |
116 |
|
|
case 'v': /* ambient value */ |
117 |
|
|
passarg(argv[i]); |
118 |
|
|
passarg(argv[++i]); |
119 |
|
|
passarg(argv[++i]); |
120 |
|
|
passarg(argv[++i]); |
121 |
|
|
break; |
122 |
|
|
default: |
123 |
|
|
goto badopt; |
124 |
|
|
} |
125 |
|
|
break; |
126 |
|
|
case 'b': |
127 |
|
|
if (!strcmp(argv[i], "-beta")) { |
128 |
|
|
if (setscan(beta, argv[++i]) < 0) { |
129 |
|
|
fprintf(stderr, |
130 |
|
|
"%s: bad beta spec: %s\n", |
131 |
|
|
progname, argv[i]); |
132 |
|
|
exit(1); |
133 |
|
|
} |
134 |
|
|
} else |
135 |
|
|
goto badopt; |
136 |
|
|
break; |
137 |
|
|
case 'x': |
138 |
|
|
switch (argv[i][2]) { |
139 |
|
|
case '\0': /* x resolution */ |
140 |
|
|
xres = atoi(argv[++i]); |
141 |
|
|
break; |
142 |
|
|
case '1': |
143 |
|
|
case '2': /* axis spec */ |
144 |
|
|
case '3': |
145 |
|
|
axis[argv[i][2]-'1'][0] = atof(argv[i+1]); |
146 |
|
|
axis[argv[i][2]-'1'][1] = atof(argv[i+2]); |
147 |
|
|
axis[argv[i][2]-'1'][2] = atof(argv[i+3]); |
148 |
|
|
i += 3; |
149 |
|
|
break; |
150 |
|
|
default: |
151 |
|
|
goto badopt; |
152 |
|
|
} |
153 |
|
|
break; |
154 |
|
|
case 'y': /* y resolution */ |
155 |
|
|
yres = atoi(argv[++i]); |
156 |
|
|
break; |
157 |
|
|
case 'l': |
158 |
|
|
switch (argv[i][2]) { |
159 |
|
|
case 'w': /* limit weight */ |
160 |
|
|
case 'r': /* limit recursion */ |
161 |
|
|
passarg(argv[i]); |
162 |
|
|
passarg(argv[++i]); |
163 |
|
|
break; |
164 |
|
|
default: |
165 |
|
|
goto badopt; |
166 |
|
|
} |
167 |
|
|
break; |
168 |
|
|
case 'u': /* user friendly format */ |
169 |
|
|
userformat = 1; |
170 |
|
|
break; |
171 |
|
|
case 'o': /* custom format */ |
172 |
|
|
passarg(argv[i]); |
173 |
|
|
userformat = -1; |
174 |
|
|
break; |
175 |
|
|
case 'd': |
176 |
|
|
switch (argv[i][2]) { |
177 |
|
|
case '\0': /* data format */ |
178 |
|
|
userformat = 0; |
179 |
|
|
break; |
180 |
|
|
case 'j': /* direct jitter */ |
181 |
|
|
case 't': /* direct threshold */ |
182 |
|
|
case 'c': /* direct certainty */ |
183 |
|
|
passarg(argv[i]); |
184 |
|
|
passarg(argv[++i]); |
185 |
|
|
break; |
186 |
|
|
default: |
187 |
|
|
goto badopt; |
188 |
|
|
} |
189 |
|
|
break; |
190 |
|
|
case 'h': /* no header */ |
191 |
|
|
header = 0; |
192 |
|
|
break; |
193 |
|
|
default:; |
194 |
|
|
badopt: |
195 |
|
|
fprintf(stderr, "%s: bad option: %s\n", |
196 |
|
|
progname, argv[i]); |
197 |
|
|
exit(1); |
198 |
|
|
} |
199 |
|
|
|
200 |
|
|
if (userformat >= 0) { /* we cook */ |
201 |
|
|
passarg("-ov"); |
202 |
|
|
passarg("-fff"); |
203 |
|
|
} else /* raw */ |
204 |
|
|
passarg("-ffa"); |
205 |
|
|
|
206 |
|
|
if (i != argc-1) { |
207 |
|
|
fprintf(stderr, "%s: single octree required\n", progname); |
208 |
|
|
exit(1); |
209 |
|
|
} |
210 |
|
|
|
211 |
|
|
passarg(argv[i]); |
212 |
|
|
passarg(NULL); |
213 |
|
|
|
214 |
|
|
fixaxes(); |
215 |
|
|
|
216 |
|
|
if (header) |
217 |
|
|
if (userformat > 0) |
218 |
|
|
printf("Alpha\tBeta\tRadiance\n"); |
219 |
|
|
else { |
220 |
|
|
printargs(argc, argv, stdout); |
221 |
|
|
putchar('\n'); |
222 |
|
|
} |
223 |
|
|
|
224 |
|
|
if (doscan() == -1) |
225 |
|
|
exit(1); |
226 |
|
|
|
227 |
|
|
exit(0); |
228 |
|
|
} |
229 |
|
|
|
230 |
|
|
|
231 |
|
|
printargs(ac, av, fp) /* print arguments to a file */ |
232 |
|
|
int ac; |
233 |
|
|
char **av; |
234 |
|
|
FILE *fp; |
235 |
|
|
{ |
236 |
|
|
while (ac-- > 0) { |
237 |
|
|
fputs(*av++, fp); |
238 |
|
|
putc(' ', fp); |
239 |
|
|
} |
240 |
|
|
putc('\n', fp); |
241 |
|
|
} |
242 |
|
|
|
243 |
|
|
|
244 |
|
|
fixaxes() /* make sure axes are OK */ |
245 |
|
|
{ |
246 |
|
|
extern double normalize(), fdot(); |
247 |
|
|
double d; |
248 |
|
|
register int i; |
249 |
|
|
|
250 |
|
|
for (i = 0; i < 3; i++) |
251 |
|
|
if (normalize(axis[i]) == 0.0) |
252 |
|
|
goto axerr; |
253 |
|
|
|
254 |
|
|
for (i = 0; i < 3; i++) { |
255 |
|
|
d = fdot(axis[i], axis[(i+1)%3]); |
256 |
|
|
if (d > FTINY || d < -FTINY) |
257 |
|
|
goto axerr; |
258 |
|
|
} |
259 |
|
|
return; |
260 |
|
|
axerr: |
261 |
|
|
fprintf(stderr, "%s: bad axis specification\n", progname); |
262 |
|
|
exit(1); |
263 |
|
|
} |
264 |
|
|
|
265 |
|
|
|
266 |
|
|
doscan() /* do scan for target */ |
267 |
|
|
{ |
268 |
|
|
FILE *fopen(), *scanstart(); |
269 |
|
|
double readsample(); |
270 |
|
|
FILE *fp; |
271 |
|
|
ANGLE *a, *b; |
272 |
|
|
|
273 |
|
|
fp = scanstart(); /* returns in child if not raw */ |
274 |
|
|
for (a = alpha; *a != AEND; a++) /* read data */ |
275 |
|
|
for (b = beta; *b != AEND; b++) |
276 |
|
|
if (userformat > 0) |
277 |
|
|
printf("%d\t%d\t%e\n", *a, *b, readsample(fp)); |
278 |
|
|
else |
279 |
|
|
printf("%e\n", readsample(fp)); |
280 |
|
|
return(scanend(fp)); |
281 |
|
|
} |
282 |
|
|
|
283 |
|
|
|
284 |
|
|
FILE * |
285 |
|
|
scanstart() /* open scanner pipeline */ |
286 |
|
|
{ |
287 |
|
|
int status; |
288 |
|
|
char *fgets(); |
289 |
|
|
int p1[2], p2[2]; |
290 |
|
|
int pid; |
291 |
|
|
FILE *fp; |
292 |
|
|
|
293 |
|
|
fflush(stdout); /* empty output buffer */ |
294 |
|
|
if (pipe(p1) < 0) /* get pipe1 */ |
295 |
|
|
goto err; |
296 |
|
|
if ((pid = fork()) == 0) { /* if child1 */ |
297 |
|
|
close(p1[1]); |
298 |
|
|
if (p1[0] != 0) { /* connect pipe1 to stdin */ |
299 |
|
|
dup2(p1[0], 0); |
300 |
|
|
close(p1[0]); |
301 |
|
|
} |
302 |
|
|
if (userformat >= 0) { /* if processing output */ |
303 |
|
|
if (pipe(p2) < 0) /* get pipe2 */ |
304 |
|
|
goto err; |
305 |
|
|
if ((pid = vfork()) == 0) { /* if child2 */ |
306 |
|
|
close(p2[0]); |
307 |
|
|
if (p2[1] != 1) { /* pipe2 to stdout */ |
308 |
|
|
dup2(p2[1], 1); |
309 |
|
|
close(p2[1]); |
310 |
|
|
} |
311 |
|
|
execvp(rtargv[0], rtargv); /* rtrace */ |
312 |
|
|
goto err; |
313 |
|
|
} |
314 |
|
|
if (pid == -1) |
315 |
|
|
goto err; |
316 |
|
|
close(p2[1]); |
317 |
|
|
if ((fp = fdopen(p2[0], "r")) == NULL) |
318 |
|
|
goto err; |
319 |
|
|
return(fp); |
320 |
|
|
} else { /* if running raw */ |
321 |
|
|
execvp(rtargv[0], rtargv); /* rtrace */ |
322 |
|
|
goto err; |
323 |
|
|
} |
324 |
|
|
} |
325 |
|
|
if (pid == -1) |
326 |
|
|
goto err; |
327 |
|
|
close(p1[0]); |
328 |
|
|
if ((fp = fdopen(p1[1], "w")) == NULL) |
329 |
|
|
goto err; |
330 |
|
|
sendsamples(fp); /* parent writes output to pipe1 */ |
331 |
|
|
fclose(fp); |
332 |
|
|
if (wait(&status) != -1) /* wait for child1 */ |
333 |
|
|
_exit(status); |
334 |
|
|
err: |
335 |
|
|
perror(progname); |
336 |
|
|
_exit(1); |
337 |
|
|
} |
338 |
|
|
|
339 |
|
|
|
340 |
|
|
scanend(fp) /* done with scanner input */ |
341 |
|
|
FILE *fp; |
342 |
|
|
{ |
343 |
|
|
int status; |
344 |
|
|
|
345 |
|
|
fclose(fp); |
346 |
|
|
if (wait(&status) == -1) { /* wait for child2 */ |
347 |
|
|
perror(progname); |
348 |
|
|
exit(1); |
349 |
|
|
} |
350 |
|
|
return(status ? -1 : 0); |
351 |
|
|
} |
352 |
|
|
|
353 |
|
|
|
354 |
|
|
sendsamples(fp) /* send our samples to fp */ |
355 |
|
|
FILE *fp; |
356 |
|
|
{ |
357 |
|
|
ANGLE *a, *b; |
358 |
|
|
|
359 |
|
|
for (a = alpha; *a != AEND; a++) |
360 |
|
|
for (b = beta; *b != AEND; b++) |
361 |
|
|
writesample(fp, *a, *b); |
362 |
|
|
} |
363 |
|
|
|
364 |
|
|
|
365 |
|
|
writesample(fp, a, b) /* write out sample ray grid */ |
366 |
|
|
FILE *fp; |
367 |
|
|
ANGLE a, b; |
368 |
|
|
{ |
369 |
|
|
double sin(), cos(); |
370 |
|
|
float sp[6]; |
371 |
|
|
double dv[3]; |
372 |
|
|
double xpos, ypos; |
373 |
|
|
int i, j, k; |
374 |
|
|
/* get direction in their system */ |
375 |
|
|
dv[0] = -cos(atorad(a)); |
376 |
|
|
dv[1] = dv[2] = -sin(atorad(a)); |
377 |
|
|
dv[1] *= cos(atorad(b)); |
378 |
|
|
dv[2] *= sin(atorad(b)); |
379 |
|
|
/* do sample grid in our system */ |
380 |
|
|
for (j = 0; j < yres; j++) { |
381 |
|
|
for (i = 0; i < xres; i++) { |
382 |
|
|
xpos = ((i + frandom())/xres - 0.5) * targetw; |
383 |
|
|
ypos = ((j + frandom())/yres - 0.5) * targeth; |
384 |
|
|
for (k = 0; k < 3; k++) { |
385 |
|
|
sp[k] = targetp[k]; |
386 |
|
|
sp[k] += xpos*axis[2][k]; |
387 |
|
|
sp[k] += ypos*axis[1][k]; |
388 |
|
|
sp[k+3] = dv[0]*axis[0][k] + |
389 |
|
|
dv[1]*axis[1][k] + |
390 |
|
|
dv[2]*axis[2][k]; |
391 |
|
|
sp[k] -= sp[k+3]*targetd; |
392 |
|
|
} |
393 |
|
|
if (fwrite(sp, sizeof(*sp), 6, fp) != 6) { |
394 |
|
|
fprintf(stderr, "%s: data write error\n", |
395 |
|
|
progname); |
396 |
|
|
_exit(1); |
397 |
|
|
} |
398 |
|
|
} |
399 |
|
|
} |
400 |
|
|
} |
401 |
|
|
|
402 |
|
|
|
403 |
|
|
double |
404 |
|
|
readsample(fp) /* read in sample ray grid */ |
405 |
|
|
FILE *fp; |
406 |
|
|
{ |
407 |
|
|
float col[3]; |
408 |
|
|
double sum; |
409 |
|
|
int i; |
410 |
|
|
|
411 |
|
|
sum = 0.0; |
412 |
|
|
i = xres*yres; |
413 |
|
|
while (i--) { |
414 |
|
|
if (fread(col, sizeof(*col), 3, fp) != 3) { |
415 |
|
|
fprintf(stderr, "%s: data read error\n", progname); |
416 |
|
|
exit(1); |
417 |
|
|
} |
418 |
|
|
sum += .3*col[0] + .59*col[1] + .11*col[2]; |
419 |
|
|
} |
420 |
|
|
return(sum / (xres*yres)); |
421 |
|
|
} |