1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.3 |
static const char RCSid[] = "$Id: rsensor.c,v 2.2 2008/02/21 20:18:25 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
|
|
|
5 |
|
|
/* |
6 |
|
|
* Compute sensor signal based on spatial sensitivity. |
7 |
|
|
* |
8 |
|
|
* Created Feb 2008 for Architectural Energy Corp. |
9 |
|
|
*/ |
10 |
|
|
|
11 |
|
|
#include "ray.h" |
12 |
|
|
#include "source.h" |
13 |
|
|
#include "view.h" |
14 |
|
|
#include "random.h" |
15 |
|
|
|
16 |
|
|
#define DEGREE (PI/180.) |
17 |
|
|
|
18 |
|
|
#define MAXNT 180 /* maximum number of theta divisions */ |
19 |
|
|
#define MAXNP 360 /* maximum number of phi divisions */ |
20 |
|
|
|
21 |
|
|
extern char *progname; /* global argv[0] */ |
22 |
|
|
extern int nowarn; /* don't report warnings? */ |
23 |
|
|
|
24 |
|
|
/* current sensor's perspective */ |
25 |
|
|
VIEW ourview = STDVIEW; |
26 |
|
|
|
27 |
|
|
unsigned long nsamps = 10000; /* desired number of initial samples */ |
28 |
|
|
unsigned long nssamps = 9000; /* number of super-samples */ |
29 |
greg |
2.2 |
int ndsamps = 32; /* number of direct samples */ |
30 |
greg |
2.1 |
int nprocs = 1; /* number of rendering processes */ |
31 |
|
|
|
32 |
|
|
float *sensor = NULL; /* current sensor data */ |
33 |
|
|
int sntp[2]; /* number of sensor theta and phi angles */ |
34 |
|
|
float maxtheta; /* maximum theta value for this sensor */ |
35 |
|
|
float tvals[MAXNT+1]; /* theta values (1-D table of 1-cos(t)) */ |
36 |
|
|
float *pvals = NULL; /* phi values (2-D table in radians) */ |
37 |
|
|
int ntheta = 0; /* polar angle divisions */ |
38 |
|
|
int nphi = 0; /* azimuthal angle divisions */ |
39 |
|
|
double gscale = 1.; /* global scaling value */ |
40 |
|
|
|
41 |
greg |
2.2 |
#define s_theta(t) sensor[(t+1)*(sntp[1]+1)] |
42 |
|
|
#define s_phi(p) sensor[(p)+1] |
43 |
|
|
#define s_val(t,p) sensor[(p)+1+(t+1)*(sntp[1]+1)] |
44 |
|
|
|
45 |
greg |
2.1 |
static void comp_sensor(char *sfile); |
46 |
|
|
|
47 |
|
|
static void |
48 |
greg |
2.3 |
over_options() /* overriding options */ |
49 |
greg |
2.1 |
{ |
50 |
greg |
2.3 |
directvis = (ndsamps <= 0); |
51 |
|
|
do_irrad = 0; |
52 |
|
|
} |
53 |
|
|
|
54 |
|
|
static void |
55 |
|
|
print_defaults() /* print out default parameters */ |
56 |
|
|
{ |
57 |
|
|
over_options(); |
58 |
greg |
2.1 |
printf("-n %-9d\t\t\t# number of processes\n", nprocs); |
59 |
|
|
printf("-rd %-9ld\t\t\t# ray directions\n", nsamps); |
60 |
|
|
/* printf("-rs %-9ld\t\t\t# ray super-samples\n", nssamps); */ |
61 |
|
|
printf("-dn %-9d\t\t\t# direct number of samples\n", ndsamps); |
62 |
|
|
printf("-vp %f %f %f\t# view point\n", |
63 |
|
|
ourview.vp[0], ourview.vp[1], ourview.vp[2]); |
64 |
|
|
printf("-vd %f %f %f\t# view direction\n", |
65 |
|
|
ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]); |
66 |
|
|
printf("-vu %f %f %f\t# view up\n", |
67 |
|
|
ourview.vup[0], ourview.vup[1], ourview.vup[2]); |
68 |
|
|
printf("-vo %f\t\t\t# view fore clipping distance\n", ourview.vfore); |
69 |
|
|
print_rdefaults(); |
70 |
|
|
} |
71 |
|
|
|
72 |
|
|
int |
73 |
|
|
main( |
74 |
|
|
int argc, |
75 |
|
|
char *argv[] |
76 |
|
|
) |
77 |
|
|
{ |
78 |
|
|
int doheader = 1; |
79 |
greg |
2.3 |
int optwarn = 0; |
80 |
greg |
2.1 |
int i, rval; |
81 |
|
|
|
82 |
|
|
progname = argv[0]; |
83 |
|
|
/* set up rendering defaults */ |
84 |
greg |
2.2 |
rand_samp = 1; |
85 |
|
|
dstrsrc = 0.5; |
86 |
|
|
srcsizerat = 0.1; |
87 |
greg |
2.1 |
directrelay = 3; |
88 |
|
|
ambounce = 1; |
89 |
greg |
2.2 |
maxdepth = -10; |
90 |
greg |
2.1 |
/* get options from command line */ |
91 |
greg |
2.3 |
for (i = 1; i < argc; i++) { |
92 |
greg |
2.1 |
while ((rval = expandarg(&argc, &argv, i)) > 0) |
93 |
|
|
; |
94 |
|
|
if (rval < 0) { |
95 |
|
|
sprintf(errmsg, "cannot expand '%s'", argv[i]); |
96 |
|
|
error(SYSTEM, errmsg); |
97 |
|
|
} |
98 |
greg |
2.3 |
if (argv[i][0] != '-') { |
99 |
|
|
if (i >= argc-1) |
100 |
|
|
break; /* final octree argument */ |
101 |
greg |
2.1 |
if (!ray_pnprocs) { |
102 |
greg |
2.3 |
over_options(); |
103 |
greg |
2.1 |
if (doheader) { /* print header */ |
104 |
|
|
printargs(argc, argv, stdout); |
105 |
|
|
fputformat("ascii", stdout); |
106 |
|
|
putchar('\n'); |
107 |
|
|
} |
108 |
|
|
/* start process(es) */ |
109 |
|
|
ray_pinit(argv[argc-1], nprocs); |
110 |
|
|
} |
111 |
greg |
2.3 |
comp_sensor(argv[i]); /* process a sensor file */ |
112 |
greg |
2.1 |
continue; |
113 |
|
|
} |
114 |
|
|
if (argv[i][1] == 'r') { /* sampling options */ |
115 |
|
|
if (argv[i][2] == 'd') |
116 |
|
|
nsamps = atol(argv[++i]); |
117 |
|
|
else if (argv[i][2] == 's') |
118 |
|
|
nssamps = atol(argv[++i]); |
119 |
|
|
else { |
120 |
|
|
sprintf(errmsg, "bad option at '%s'", argv[i]); |
121 |
|
|
error(USER, errmsg); |
122 |
|
|
} |
123 |
|
|
continue; |
124 |
|
|
} |
125 |
|
|
/* direct component samples */ |
126 |
|
|
if (argv[i][1] == 'd' && argv[i][2] == 'n') { |
127 |
|
|
ndsamps = atoi(argv[++i]); |
128 |
|
|
continue; |
129 |
|
|
} |
130 |
|
|
if (argv[i][1] == 'v') { /* next sensor view */ |
131 |
|
|
if (argv[i][2] == 'f') { |
132 |
|
|
rval = viewfile(argv[++i], &ourview, NULL); |
133 |
|
|
if (rval < 0) { |
134 |
|
|
sprintf(errmsg, |
135 |
|
|
"cannot open view file \"%s\"", |
136 |
|
|
argv[i]); |
137 |
|
|
error(SYSTEM, errmsg); |
138 |
|
|
} else if (rval == 0) { |
139 |
|
|
sprintf(errmsg, |
140 |
|
|
"bad view file \"%s\"", |
141 |
|
|
argv[i]); |
142 |
|
|
error(USER, errmsg); |
143 |
|
|
} |
144 |
|
|
continue; |
145 |
|
|
} |
146 |
|
|
rval = getviewopt(&ourview, argc-i, argv+i); |
147 |
|
|
if (rval >= 0) { |
148 |
|
|
i += rval; |
149 |
|
|
continue; |
150 |
|
|
} |
151 |
|
|
sprintf(errmsg, "bad view option at '%s'", argv[i]); |
152 |
|
|
error(USER, errmsg); |
153 |
|
|
} |
154 |
greg |
2.3 |
if (!strcmp(argv[i], "-w")) { /* toggle warnings */ |
155 |
|
|
nowarn = !nowarn; |
156 |
greg |
2.1 |
continue; |
157 |
|
|
} |
158 |
|
|
if (ray_pnprocs) { |
159 |
greg |
2.3 |
if (!optwarn++) |
160 |
|
|
error(WARNING, |
161 |
greg |
2.1 |
"rendering options should appear before first sensor"); |
162 |
|
|
} else if (!strcmp(argv[i], "-defaults")) { |
163 |
|
|
print_defaults(); |
164 |
|
|
return(0); |
165 |
|
|
} |
166 |
|
|
if (argv[i][1] == 'h') { /* header toggle */ |
167 |
|
|
doheader = !doheader; |
168 |
|
|
continue; |
169 |
|
|
} |
170 |
|
|
if (!strcmp(argv[i], "-n")) { /* number of processes */ |
171 |
|
|
nprocs = atoi(argv[++i]); |
172 |
|
|
if (nprocs <= 0) |
173 |
|
|
error(USER, "illegal number of processes"); |
174 |
|
|
continue; |
175 |
|
|
} |
176 |
|
|
rval = getrenderopt(argc-i, argv+i); |
177 |
|
|
if (rval < 0) { |
178 |
|
|
sprintf(errmsg, "bad render option at '%s'", argv[i]); |
179 |
|
|
error(USER, errmsg); |
180 |
|
|
} |
181 |
|
|
i += rval; |
182 |
|
|
} |
183 |
greg |
2.3 |
if (!ray_pnprocs) |
184 |
|
|
error(USER, i<argc ? "missing sensor file" : "missing octree"); |
185 |
greg |
2.1 |
quit(0); |
186 |
|
|
} |
187 |
|
|
|
188 |
|
|
/* Load sensor sensitivities (first row and column are angles) */ |
189 |
|
|
static float * |
190 |
|
|
load_sensor( |
191 |
|
|
int ntp[2], |
192 |
|
|
char *sfile |
193 |
|
|
) |
194 |
|
|
{ |
195 |
|
|
char linebuf[8192]; |
196 |
|
|
int nelem = 1000; |
197 |
|
|
float *sarr = (float *)malloc(sizeof(float)*nelem); |
198 |
|
|
FILE *fp; |
199 |
|
|
char *cp; |
200 |
|
|
int i; |
201 |
|
|
|
202 |
|
|
fp = frlibopen(sfile); |
203 |
|
|
if (fp == NULL) { |
204 |
|
|
sprintf(errmsg, "cannot open sensor file '%s'", sfile); |
205 |
|
|
error(SYSTEM, errmsg); |
206 |
|
|
} |
207 |
|
|
fgets(linebuf, sizeof(linebuf), fp); |
208 |
|
|
if (!strncmp(linebuf, "Elevation ", 10)) |
209 |
|
|
fgets(linebuf, sizeof(linebuf), fp); |
210 |
|
|
/* get phi values */ |
211 |
|
|
sarr[0] = .0f; |
212 |
|
|
if (strncmp(linebuf, "degrees", 7)) { |
213 |
|
|
sprintf(errmsg, "Missing 'degrees' in sensor file '%s'", sfile); |
214 |
|
|
error(USER, errmsg); |
215 |
|
|
} |
216 |
|
|
cp = sskip(linebuf); |
217 |
|
|
ntp[1] = 0; |
218 |
|
|
for ( ; ; ) { |
219 |
|
|
sarr[ntp[1]+1] = atof(cp); |
220 |
|
|
cp = fskip(cp); |
221 |
|
|
if (cp == NULL) |
222 |
|
|
break; |
223 |
|
|
++ntp[1]; |
224 |
|
|
} |
225 |
|
|
ntp[0] = 0; /* get thetas + data */ |
226 |
|
|
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) { |
227 |
|
|
++ntp[0]; |
228 |
|
|
if ((ntp[0]+1)*(ntp[1]+1) > nelem) { |
229 |
|
|
nelem += (nelem>>2) + ntp[1]; |
230 |
|
|
sarr = (float *)realloc((void *)sarr, |
231 |
|
|
sizeof(float)*nelem); |
232 |
|
|
if (sarr == NULL) |
233 |
|
|
error(SYSTEM, "out of memory in load_sensor()"); |
234 |
|
|
} |
235 |
|
|
cp = linebuf; |
236 |
|
|
i = ntp[0]*(ntp[1]+1); |
237 |
|
|
for ( ; ; ) { |
238 |
|
|
sarr[i] = atof(cp); |
239 |
|
|
cp = fskip(cp); |
240 |
|
|
if (cp == NULL) |
241 |
|
|
break; |
242 |
|
|
++i; |
243 |
|
|
} |
244 |
|
|
if (i == ntp[0]*(ntp[1]+1)) |
245 |
|
|
break; |
246 |
|
|
if (i != (ntp[0]+1)*(ntp[1]+1)) { |
247 |
|
|
sprintf(errmsg, |
248 |
|
|
"bad column count near line %d in sensor file '%s'", |
249 |
|
|
ntp[0]+1, sfile); |
250 |
|
|
error(USER, errmsg); |
251 |
|
|
} |
252 |
|
|
} |
253 |
|
|
nelem = i; |
254 |
|
|
fclose(fp); |
255 |
|
|
errmsg[0] = '\0'; /* sanity checks */ |
256 |
|
|
if (ntp[0] <= 0) |
257 |
|
|
sprintf(errmsg, "no data in sensor file '%s'", sfile); |
258 |
|
|
else if (fabs(sarr[ntp[1]+1]) > FTINY) |
259 |
|
|
sprintf(errmsg, "minimum theta must be 0 in sensor file '%s'", |
260 |
|
|
sfile); |
261 |
|
|
else if (fabs(sarr[1]) > FTINY) |
262 |
|
|
sprintf(errmsg, "minimum phi must be 0 in sensor file '%s'", |
263 |
|
|
sfile); |
264 |
|
|
else if (sarr[ntp[1]] <= FTINY) |
265 |
|
|
sprintf(errmsg, |
266 |
|
|
"maximum phi must be positive in sensor file '%s'", |
267 |
|
|
sfile); |
268 |
|
|
else if (sarr[ntp[0]*(ntp[1]+1)] <= FTINY) |
269 |
|
|
sprintf(errmsg, |
270 |
|
|
"maximum theta must be positive in sensor file '%s'", |
271 |
|
|
sfile); |
272 |
|
|
if (errmsg[0]) |
273 |
|
|
error(USER, errmsg); |
274 |
|
|
return((float *)realloc((void *)sarr, sizeof(float)*nelem)); |
275 |
|
|
} |
276 |
|
|
|
277 |
|
|
/* Initialize probability table */ |
278 |
|
|
static void |
279 |
|
|
init_ptable( |
280 |
|
|
char *sfile |
281 |
|
|
) |
282 |
|
|
{ |
283 |
|
|
int samptot = nsamps; |
284 |
|
|
float *rowp, *rowp1; |
285 |
|
|
double rowsum[MAXNT], rowomega[MAXNT]; |
286 |
|
|
double thdiv[MAXNT+1], phdiv[MAXNP+1]; |
287 |
|
|
double tsize, psize; |
288 |
|
|
double prob, frac, frac1; |
289 |
|
|
int i, j, t, p; |
290 |
|
|
/* free old table */ |
291 |
|
|
if (sensor != NULL) |
292 |
|
|
free((void *)sensor); |
293 |
|
|
if (pvals != NULL) |
294 |
|
|
free((void *)pvals); |
295 |
|
|
if (sfile == NULL || !*sfile) { |
296 |
greg |
2.2 |
sensor = NULL; |
297 |
|
|
sntp[0] = sntp[1] = 0; |
298 |
greg |
2.1 |
pvals = NULL; |
299 |
|
|
ntheta = nphi = 0; |
300 |
|
|
return; |
301 |
|
|
} |
302 |
|
|
/* load sensor table */ |
303 |
|
|
sensor = load_sensor(sntp, sfile); |
304 |
|
|
if (sntp[0] > MAXNT) { |
305 |
|
|
sprintf(errmsg, "Too many theta rows in sensor file '%s'", |
306 |
|
|
sfile); |
307 |
|
|
error(INTERNAL, errmsg); |
308 |
|
|
} |
309 |
|
|
if (sntp[1] > MAXNP) { |
310 |
|
|
sprintf(errmsg, "Too many phi columns in sensor file '%s'", |
311 |
|
|
sfile); |
312 |
|
|
error(INTERNAL, errmsg); |
313 |
|
|
} |
314 |
|
|
/* compute boundary angles */ |
315 |
greg |
2.2 |
maxtheta = 1.5f*s_theta(sntp[0]-1) - 0.5f*s_theta(sntp[0]-2); |
316 |
greg |
2.1 |
thdiv[0] = .0; |
317 |
|
|
for (t = 1; t < sntp[0]; t++) |
318 |
greg |
2.2 |
thdiv[t] = DEGREE/2.*(s_theta(t-1) + s_theta(t)); |
319 |
greg |
2.1 |
thdiv[sntp[0]] = maxtheta*DEGREE; |
320 |
|
|
phdiv[0] = .0; |
321 |
|
|
for (p = 1; p < sntp[1]; p++) |
322 |
greg |
2.2 |
phdiv[p] = DEGREE/2.*(s_phi(p-1) + s_phi(p)); |
323 |
greg |
2.1 |
phdiv[sntp[1]] = 2.*PI; |
324 |
|
|
/* size our table */ |
325 |
|
|
tsize = 1. - cos(maxtheta*DEGREE); |
326 |
greg |
2.2 |
psize = PI*tsize/(maxtheta*DEGREE); |
327 |
greg |
2.1 |
if (sntp[0]*sntp[1] < samptot) /* don't overdo resolution */ |
328 |
|
|
samptot = sntp[0]*sntp[1]; |
329 |
greg |
2.2 |
ntheta = (int)(sqrt((double)samptot*tsize/psize) + 0.5); |
330 |
greg |
2.1 |
if (ntheta > MAXNT) |
331 |
|
|
ntheta = MAXNT; |
332 |
|
|
nphi = samptot/ntheta; |
333 |
|
|
pvals = (float *)malloc(sizeof(float)*ntheta*(nphi+1)); |
334 |
|
|
if (pvals == NULL) |
335 |
|
|
error(SYSTEM, "out of memory in init_ptable()"); |
336 |
|
|
gscale = .0; /* compute our inverse table */ |
337 |
|
|
for (i = 0; i < sntp[0]; i++) { |
338 |
greg |
2.2 |
rowp = &s_val(i,0); |
339 |
greg |
2.1 |
rowsum[i] = 0.; |
340 |
|
|
for (j = 0; j < sntp[1]; j++) |
341 |
|
|
rowsum[i] += *rowp++; |
342 |
|
|
rowomega[i] = cos(thdiv[i]) - cos(thdiv[i+1]); |
343 |
|
|
rowomega[i] *= 2.*PI / (double)sntp[1]; |
344 |
|
|
gscale += rowsum[i] * rowomega[i]; |
345 |
|
|
} |
346 |
greg |
2.2 |
for (i = 0; i < ntheta; i++) { |
347 |
greg |
2.1 |
prob = (double)i / (double)ntheta; |
348 |
|
|
for (t = 0; t < sntp[0]; t++) |
349 |
|
|
if ((prob -= rowsum[t]*rowomega[t]/gscale) <= .0) |
350 |
|
|
break; |
351 |
|
|
if (t >= sntp[0]) |
352 |
|
|
error(INTERNAL, "code error 1 in init_ptable()"); |
353 |
|
|
frac = 1. + prob/(rowsum[t]*rowomega[t]/gscale); |
354 |
|
|
tvals[i] = 1. - ( (1.-frac)*cos(thdiv[t]) + |
355 |
|
|
frac*cos(thdiv[t+1]) ); |
356 |
greg |
2.2 |
/* offset b/c sensor values are centered */ |
357 |
|
|
if (t <= 0 || frac > 0.5) |
358 |
|
|
frac -= 0.5; |
359 |
|
|
else if (t >= sntp[0]-1 || frac < 0.5) { |
360 |
|
|
frac += 0.5; |
361 |
|
|
--t; |
362 |
|
|
} |
363 |
greg |
2.1 |
pvals[i*(nphi+1)] = .0f; |
364 |
|
|
for (j = 1; j < nphi; j++) { |
365 |
|
|
prob = (double)j / (double)nphi; |
366 |
greg |
2.2 |
rowp = &s_val(t,0); |
367 |
|
|
rowp1 = &s_val(t+1,0); |
368 |
greg |
2.1 |
for (p = 0; p < sntp[1]; p++) { |
369 |
greg |
2.2 |
if ((prob -= (1.-frac)*rowp[p]/rowsum[t] + |
370 |
|
|
frac*rowp1[p]/rowsum[t+1]) <= .0) |
371 |
greg |
2.1 |
break; |
372 |
|
|
if (p >= sntp[1]) |
373 |
|
|
error(INTERNAL, |
374 |
|
|
"code error 2 in init_ptable()"); |
375 |
greg |
2.2 |
frac1 = 1. + prob/((1.-frac)*rowp[p]/rowsum[t] |
376 |
|
|
+ frac*rowp1[p]/rowsum[t+1]); |
377 |
|
|
if (p <= 0 || frac1 > 0.5) |
378 |
|
|
frac1 -= 0.5; |
379 |
|
|
else if (p >= sntp[1]-1 || frac1 < 0.5) { |
380 |
|
|
frac1 += 0.5; |
381 |
|
|
--p; |
382 |
|
|
} |
383 |
greg |
2.1 |
pvals[i*(nphi+1) + j] = (1.-frac1)*phdiv[p] + |
384 |
|
|
frac1*phdiv[p+1]; |
385 |
|
|
} |
386 |
|
|
} |
387 |
|
|
pvals[i*(nphi+1) + nphi] = (float)(2.*PI); |
388 |
|
|
} |
389 |
greg |
2.2 |
tvals[0] = .0f; |
390 |
greg |
2.1 |
tvals[ntheta] = (float)tsize; |
391 |
|
|
} |
392 |
|
|
|
393 |
|
|
/* Get normalized direction from random variables in [0,1) range */ |
394 |
|
|
static void |
395 |
|
|
get_direc( |
396 |
|
|
FVECT dvec, |
397 |
|
|
double x, |
398 |
|
|
double y |
399 |
|
|
) |
400 |
|
|
{ |
401 |
|
|
double xfrac = x*ntheta; |
402 |
|
|
int tndx = (int)xfrac; |
403 |
|
|
double yfrac = y*nphi; |
404 |
|
|
int pndx = (int)yfrac; |
405 |
|
|
double rad, phi; |
406 |
|
|
FVECT dv; |
407 |
|
|
int i; |
408 |
|
|
|
409 |
|
|
xfrac -= (double)tndx; |
410 |
|
|
yfrac -= (double)pndx; |
411 |
|
|
pndx += tndx*(nphi+1); |
412 |
|
|
|
413 |
|
|
dv[2] = 1. - ((1.-xfrac)*tvals[tndx] + xfrac*tvals[tndx+1]); |
414 |
|
|
rad = sqrt(1. - dv[2]*dv[2]); |
415 |
|
|
phi = (1.-yfrac)*pvals[pndx] + yfrac*pvals[pndx+1]; |
416 |
|
|
dv[0] = -rad*sin(phi); |
417 |
|
|
dv[1] = rad*cos(phi); |
418 |
|
|
for (i = 3; i--; ) |
419 |
|
|
dvec[i] = dv[0]*ourview.hvec[i] + |
420 |
|
|
dv[1]*ourview.vvec[i] + |
421 |
|
|
dv[2]*ourview.vdir[i] ; |
422 |
|
|
} |
423 |
|
|
|
424 |
|
|
/* Get sensor value in the specified direction (normalized) */ |
425 |
|
|
static float |
426 |
|
|
sens_val( |
427 |
|
|
FVECT dvec |
428 |
|
|
) |
429 |
|
|
{ |
430 |
|
|
FVECT dv; |
431 |
|
|
float theta, phi; |
432 |
|
|
int t, p; |
433 |
|
|
|
434 |
|
|
dv[2] = DOT(dvec, ourview.vdir); |
435 |
|
|
theta = (float)((1./DEGREE) * acos(dv[2])); |
436 |
|
|
if (theta >= maxtheta) |
437 |
|
|
return(.0f); |
438 |
|
|
dv[0] = DOT(dvec, ourview.hvec); |
439 |
|
|
dv[1] = DOT(dvec, ourview.vvec); |
440 |
|
|
phi = (float)((1./DEGREE) * atan2(-dv[0], dv[1])); |
441 |
|
|
while (phi < .0f) phi += 360.f; |
442 |
|
|
t = (int)(theta/maxtheta * sntp[0]); |
443 |
|
|
p = (int)(phi*(1./360.) * sntp[1]); |
444 |
|
|
/* hack for non-uniform sensor grid */ |
445 |
greg |
2.2 |
while (t+1 < sntp[0] && theta >= s_theta(t+1)) |
446 |
greg |
2.1 |
++t; |
447 |
greg |
2.2 |
while (t-1 >= 0 && theta <= s_theta(t-1)) |
448 |
greg |
2.1 |
--t; |
449 |
greg |
2.2 |
while (p+1 < sntp[1] && phi >= s_phi(p+1)) |
450 |
greg |
2.1 |
++p; |
451 |
greg |
2.2 |
while (p-1 >= 0 && phi <= s_phi(p-1)) |
452 |
greg |
2.1 |
--p; |
453 |
greg |
2.2 |
return(s_val(t,p)); |
454 |
greg |
2.1 |
} |
455 |
|
|
|
456 |
|
|
/* Compute sensor output */ |
457 |
|
|
static void |
458 |
|
|
comp_sensor( |
459 |
|
|
char *sfile |
460 |
|
|
) |
461 |
|
|
{ |
462 |
|
|
int ndirs = dstrsrc > FTINY ? ndsamps : |
463 |
|
|
ndsamps > 0 ? 1 : 0; |
464 |
|
|
char *err; |
465 |
|
|
int nt, np; |
466 |
|
|
COLOR vsum; |
467 |
|
|
RAY rr; |
468 |
|
|
int i, j; |
469 |
|
|
/* set view */ |
470 |
|
|
ourview.type = VT_ANG; |
471 |
|
|
ourview.horiz = ourview.vert = 180.; |
472 |
|
|
ourview.hoff = ourview.voff = .0; |
473 |
|
|
err = setview(&ourview); |
474 |
|
|
if (err != NULL) |
475 |
|
|
error(USER, err); |
476 |
|
|
/* assign probability table */ |
477 |
|
|
init_ptable(sfile); |
478 |
|
|
/* do Monte Carlo sampling */ |
479 |
|
|
setcolor(vsum, .0f, .0f, .0f); |
480 |
|
|
nt = (int)(sqrt((double)nsamps*ntheta/nphi) + .5); |
481 |
|
|
np = nsamps/nt; |
482 |
|
|
VCOPY(rr.rorg, ourview.vp); |
483 |
|
|
rr.rmax = .0; |
484 |
|
|
for (i = 0; i < nt; i++) |
485 |
greg |
2.2 |
for (j = 0; j < np; j++) { |
486 |
|
|
get_direc(rr.rdir, (i+frandom())/nt, (j+frandom())/np); |
487 |
greg |
2.1 |
rayorigin(&rr, PRIMARY, NULL, NULL); |
488 |
|
|
if (ray_pqueue(&rr) == 1) |
489 |
|
|
addcolor(vsum, rr.rcol); |
490 |
|
|
} |
491 |
|
|
/* finish MC calculation */ |
492 |
|
|
while (ray_presult(&rr, 0) > 0) |
493 |
|
|
addcolor(vsum, rr.rcol); |
494 |
|
|
scalecolor(vsum, gscale/(nt*np)); |
495 |
|
|
/* compute direct component */ |
496 |
|
|
for (i = ndirs; i-- > 0; ) { |
497 |
|
|
SRCINDEX si; |
498 |
|
|
initsrcindex(&si); |
499 |
|
|
while (srcray(&rr, NULL, &si)) { |
500 |
|
|
double d = sens_val(rr.rdir); |
501 |
|
|
if (d <= FTINY) |
502 |
|
|
continue; |
503 |
|
|
d *= si.dom/ndirs; |
504 |
|
|
scalecolor(rr.rcoef, d); |
505 |
|
|
if (ray_pqueue(&rr) == 1) { |
506 |
|
|
multcolor(rr.rcol, rr.rcoef); |
507 |
|
|
addcolor(vsum, rr.rcol); |
508 |
|
|
} |
509 |
|
|
} |
510 |
|
|
} |
511 |
|
|
/* finish direct calculation */ |
512 |
|
|
while (ray_presult(&rr, 0) > 0) { |
513 |
|
|
multcolor(rr.rcol, rr.rcoef); |
514 |
|
|
addcolor(vsum, rr.rcol); |
515 |
|
|
} |
516 |
|
|
/* print our result */ |
517 |
|
|
printf("%.4e %.4e %.4e\n", colval(vsum,RED), |
518 |
|
|
colval(vsum,GRN), colval(vsum,BLU)); |
519 |
|
|
} |