5 |
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* Compute rays corresponding to a given picture or view. |
6 |
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*/ |
7 |
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|
8 |
– |
|
9 |
– |
#include "standard.h" |
10 |
– |
|
8 |
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#include "platform.h" |
9 |
+ |
#include "standard.h" |
10 |
+ |
#include "random.h" |
11 |
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#include "view.h" |
12 |
|
|
13 |
< |
extern int putf(), putd(), puta(); |
13 |
> |
typedef void putfunc(FVECT ro, FVECT rd); |
14 |
> |
static putfunc puta; |
15 |
> |
static putfunc putf; |
16 |
> |
static putfunc putd; |
17 |
> |
static void pix2rays(FILE *fp); |
18 |
> |
static void putrays(void); |
19 |
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|
20 |
< |
int (*putr)() = puta; |
20 |
> |
static putfunc *putr = puta; |
21 |
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|
22 |
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VIEW vw = STDVIEW; |
23 |
|
|
25 |
|
|
26 |
|
double pa = 1.; |
27 |
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|
28 |
+ |
double pj = 0.; |
29 |
+ |
|
30 |
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int zfd = -1; |
31 |
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|
32 |
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int fromstdin = 0; |
33 |
|
|
34 |
+ |
int unbuffered = 0; |
35 |
+ |
|
36 |
+ |
int repeatcnt = 1; |
37 |
+ |
|
38 |
|
char *progname; |
39 |
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|
40 |
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|
41 |
< |
main(argc, argv) |
42 |
< |
int argc; |
43 |
< |
char *argv[]; |
41 |
> |
int |
42 |
> |
main( |
43 |
> |
int argc, |
44 |
> |
char *argv[] |
45 |
> |
) |
46 |
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{ |
47 |
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char *err; |
48 |
|
int rval, getdim = 0; |
49 |
< |
register int i; |
49 |
> |
int i; |
50 |
|
|
51 |
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progname = argv[0]; |
52 |
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if (argc < 2) |
60 |
|
break; |
61 |
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case 'f': /* float */ |
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putr = putf; |
63 |
+ |
SET_FILE_BINARY(stdout); |
64 |
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break; |
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case 'd': /* double */ |
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putr = putd; |
67 |
+ |
SET_FILE_BINARY(stdout); |
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break; |
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default: |
70 |
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goto userr; |
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exit(1); |
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} |
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break; |
108 |
< |
case 'p': /* pixel aspect ratio */ |
109 |
< |
pa = atof(argv[++i]); |
108 |
> |
case 'c': /* repeat count */ |
109 |
> |
repeatcnt = atoi(argv[++i]); |
110 |
|
break; |
111 |
+ |
case 'p': /* pixel aspect or jitter */ |
112 |
+ |
if (argv[i][2] == 'a') |
113 |
+ |
pa = atof(argv[++i]); |
114 |
+ |
else if (argv[i][2] == 'j') |
115 |
+ |
pj = atof(argv[++i]); |
116 |
+ |
else |
117 |
+ |
goto userr; |
118 |
+ |
break; |
119 |
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case 'i': /* get pixels from stdin */ |
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fromstdin = 1; |
121 |
|
break; |
122 |
+ |
case 'u': /* unbuffered output */ |
123 |
+ |
unbuffered = 1; |
124 |
+ |
break; |
125 |
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default: |
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goto userr; |
127 |
|
} |
161 |
|
exit(0); |
162 |
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userr: |
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fprintf(stderr, |
164 |
< |
"Usage: %s [ -i -f{a|f|d} | -d ] { view opts .. | picture [zbuf] }\n", |
164 |
> |
"Usage: %s [ -i -u -f{a|f|d} -c rept | -d ] { view opts .. | picture [zbuf] }\n", |
165 |
|
progname); |
166 |
|
exit(1); |
167 |
|
} |
168 |
|
|
169 |
|
|
170 |
< |
pix2rays(FILE *fp) |
170 |
> |
static void |
171 |
> |
jitterloc( |
172 |
> |
RREAL loc[2] |
173 |
> |
) |
174 |
|
{ |
175 |
+ |
if (pj > FTINY) { |
176 |
+ |
loc[0] += pj*(.5 - frandom())/rs.xr; |
177 |
+ |
loc[1] += pj*(.5 - frandom())/rs.yr; |
178 |
+ |
} |
179 |
+ |
} |
180 |
+ |
|
181 |
+ |
|
182 |
+ |
static void |
183 |
+ |
pix2rays( |
184 |
+ |
FILE *fp |
185 |
+ |
) |
186 |
+ |
{ |
187 |
|
static FVECT rorg, rdir; |
188 |
|
float zval; |
189 |
|
double px, py; |
190 |
+ |
RREAL loc[2]; |
191 |
|
int pp[2]; |
192 |
|
double d; |
193 |
< |
register int i; |
193 |
> |
int i; |
194 |
|
|
195 |
|
while (fscanf(fp, "%lf %lf", &px, &py) == 2) { |
196 |
< |
if (px < 0 || px >= rs.xr || |
197 |
< |
py < 0 || py >= rs.yr) { |
157 |
< |
fprintf(stderr, |
158 |
< |
"%s: (x,y) pair (%.0f,%.0f) out of range\n", |
159 |
< |
progname, px, py); |
160 |
< |
exit(1); |
161 |
< |
} |
196 |
> |
px += .5; py += .5; |
197 |
> |
loc[0] = px/rs.xr; loc[1] = py/rs.yr; |
198 |
|
if (zfd >= 0) { |
199 |
< |
loc2pix(pp, &rs, px/rs.xr, py/rs.yr); |
199 |
> |
loc2pix(pp, &rs, loc[0], loc[1]); |
200 |
|
if (lseek(zfd, |
201 |
|
(pp[1]*scanlen(&rs)+pp[0])*sizeof(float), |
202 |
|
SEEK_SET) < 0 || |
207 |
|
exit(1); |
208 |
|
} |
209 |
|
} |
210 |
< |
d = viewray(rorg, rdir, &vw, px/rs.xr, py/rs.yr); |
210 |
> |
jitterloc(loc); |
211 |
> |
d = viewray(rorg, rdir, &vw, loc[0], loc[1]); |
212 |
|
if (d < -FTINY) |
213 |
|
rorg[0] = rorg[1] = rorg[2] = |
214 |
|
rdir[0] = rdir[1] = rdir[2] = 0.; |
221 |
|
rdir[0] *= d; rdir[1] *= d; rdir[2] *= d; |
222 |
|
} |
223 |
|
(*putr)(rorg, rdir); |
224 |
+ |
if (unbuffered) |
225 |
+ |
fflush(stdout); |
226 |
|
} |
227 |
|
if (!feof(fp)) { |
228 |
|
fprintf(stderr, "%s: expected px py on input\n", progname); |
231 |
|
} |
232 |
|
|
233 |
|
|
234 |
< |
putrays() |
234 |
> |
static void |
235 |
> |
putrays(void) |
236 |
|
{ |
237 |
< |
static RREAL loc[2]; |
238 |
< |
static FVECT rorg, rdir; |
239 |
< |
float *zbuf; |
237 |
> |
RREAL loc[2]; |
238 |
> |
FVECT rorg, rdir; |
239 |
> |
float *zbuf = NULL; |
240 |
|
int sc; |
241 |
|
double d; |
242 |
< |
register int si, i; |
242 |
> |
int si, i, c; |
243 |
|
|
244 |
|
if (zfd >= 0) { |
245 |
|
zbuf = (float *)malloc(scanlen(&rs)*sizeof(float)); |
258 |
|
} |
259 |
|
} |
260 |
|
for (si = 0; si < scanlen(&rs); si++) { |
261 |
+ |
for (c = repeatcnt; c-- > 0; ) { |
262 |
|
pix2loc(loc, &rs, si, sc); |
263 |
+ |
jitterloc(loc); |
264 |
|
d = viewray(rorg, rdir, &vw, loc[0], loc[1]); |
265 |
|
if (d < -FTINY) |
266 |
|
rorg[0] = rorg[1] = rorg[2] = |
274 |
|
rdir[0] *= d; rdir[1] *= d; rdir[2] *= d; |
275 |
|
} |
276 |
|
(*putr)(rorg, rdir); |
277 |
+ |
} |
278 |
|
} |
279 |
|
} |
280 |
|
if (zfd >= 0) |
282 |
|
} |
283 |
|
|
284 |
|
|
285 |
< |
puta(ro, rd) /* put out ray in ASCII format */ |
286 |
< |
FVECT ro, rd; |
285 |
> |
static void |
286 |
> |
puta( /* put out ray in ASCII format */ |
287 |
> |
FVECT ro, |
288 |
> |
FVECT rd |
289 |
> |
) |
290 |
|
{ |
291 |
|
printf("%.5e %.5e %.5e %.5e %.5e %.5e\n", |
292 |
|
ro[0], ro[1], ro[2], |
294 |
|
} |
295 |
|
|
296 |
|
|
297 |
< |
putf(ro, rd) /* put out ray in float format */ |
298 |
< |
FVECT ro, rd; |
297 |
> |
static void |
298 |
> |
putf( /* put out ray in float format */ |
299 |
> |
FVECT ro, |
300 |
> |
FVECT rd |
301 |
> |
) |
302 |
|
{ |
303 |
|
float v[6]; |
304 |
|
|
308 |
|
} |
309 |
|
|
310 |
|
|
311 |
< |
putd(ro, rd) /* put out ray in double format */ |
312 |
< |
FVECT ro, rd; |
311 |
> |
static void |
312 |
> |
putd( /* put out ray in double format */ |
313 |
> |
FVECT ro, |
314 |
> |
FVECT rd |
315 |
> |
) |
316 |
|
{ |
317 |
|
double v[6]; |
318 |
|
|