9 |
|
|
10 |
|
#include "copyright.h" |
11 |
|
|
12 |
+ |
#include <ctype.h> |
13 |
|
#include "rtio.h" |
14 |
|
#include "rtmath.h" |
15 |
|
#include "paths.h" |
26 |
|
|
27 |
|
|
28 |
|
char * |
29 |
< |
setview(v) /* set hvec and vvec, return message on error */ |
30 |
< |
register VIEW *v; |
29 |
> |
setview( /* set hvec and vvec, return message on error */ |
30 |
> |
VIEW *v |
31 |
> |
) |
32 |
|
{ |
33 |
|
static char ill_horiz[] = "illegal horizontal view size"; |
34 |
|
static char ill_vert[] = "illegal vertical view size"; |
35 |
|
|
36 |
< |
if (v->vaft < -FTINY || (v->vaft > FTINY && v->vaft <= v->vfore)) |
36 |
> |
if ((v->vfore < -FTINY) | (v->vaft < -FTINY) || |
37 |
> |
(v->vaft > FTINY) & (v->vaft <= v->vfore)) |
38 |
|
return("illegal fore/aft clipping plane"); |
39 |
|
|
40 |
+ |
if (v->vdist <= FTINY) |
41 |
+ |
return("illegal view distance"); |
42 |
|
v->vdist *= normalize(v->vdir); /* normalize direction */ |
43 |
|
if (v->vdist == 0.0) |
44 |
|
return("zero view direction"); |
95 |
|
v->hn2 = 2.0 * sin(v->horiz*(PI/180.0/2.0)); |
96 |
|
v->vn2 = 2.0 * sin(v->vert*(PI/180.0/2.0)); |
97 |
|
break; |
98 |
+ |
case VT_PLS: /* planispheric fisheye */ |
99 |
+ |
if (v->horiz >= 360.0-FTINY) |
100 |
+ |
return(ill_horiz); |
101 |
+ |
if (v->vert >= 360.0-FTINY) |
102 |
+ |
return(ill_vert); |
103 |
+ |
v->hn2 = 2.*sin(v->horiz*(PI/180.0/2.0)) / |
104 |
+ |
(1.0 + cos(v->horiz*(PI/180.0/2.0))); |
105 |
+ |
v->vn2 = 2.*sin(v->vert*(PI/180.0/2.0)) / |
106 |
+ |
(1.0 + cos(v->vert*(PI/180.0/2.0))); |
107 |
+ |
break; |
108 |
|
default: |
109 |
|
return("unknown view type"); |
110 |
|
} |
111 |
< |
if (v->type != VT_ANG) { |
111 |
> |
if (v->type != VT_ANG && v->type != VT_PLS) { |
112 |
|
if (v->type != VT_CYL) { |
113 |
|
v->hvec[0] *= v->hn2; |
114 |
|
v->hvec[1] *= v->hn2; |
126 |
|
|
127 |
|
|
128 |
|
void |
129 |
< |
normaspect(va, ap, xp, yp) /* fix pixel aspect or resolution */ |
130 |
< |
double va; /* view aspect ratio */ |
131 |
< |
double *ap; /* pixel aspect in (or out if 0) */ |
132 |
< |
int *xp, *yp; /* x and y resolution in (or out if *ap!=0) */ |
129 |
> |
normaspect( /* fix pixel aspect or resolution */ |
130 |
> |
double va, /* view aspect ratio */ |
131 |
> |
double *ap, /* pixel aspect in (or out if 0) */ |
132 |
> |
int *xp, |
133 |
> |
int *yp /* x and y resolution in (or out if *ap!=0) */ |
134 |
> |
) |
135 |
|
{ |
136 |
|
if (*ap <= FTINY) |
137 |
|
*ap = va * *xp / *yp; /* compute pixel aspect */ |
143 |
|
|
144 |
|
|
145 |
|
double |
146 |
< |
viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
147 |
< |
FVECT orig, direc; |
148 |
< |
register VIEW *v; |
149 |
< |
double x, y; |
146 |
> |
viewray( /* compute ray origin and direction */ |
147 |
> |
FVECT orig, |
148 |
> |
FVECT direc, |
149 |
> |
VIEW *v, |
150 |
> |
double x, |
151 |
> |
double y |
152 |
> |
) |
153 |
|
{ |
154 |
|
double d, z; |
155 |
|
|
170 |
|
direc[0] = v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
171 |
|
direc[1] = v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
172 |
|
direc[2] = v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
173 |
< |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
154 |
< |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
155 |
< |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
173 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
174 |
|
d = normalize(direc); |
175 |
|
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
176 |
|
case VT_HEM: /* hemispherical fisheye */ |
181 |
|
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
182 |
|
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
183 |
|
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
184 |
< |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
167 |
< |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
168 |
< |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
184 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
185 |
|
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
186 |
|
case VT_CYL: /* cylindrical panorama */ |
187 |
|
d = x * v->horiz * (PI/180.0); |
190 |
|
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
191 |
|
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
192 |
|
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
193 |
< |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
178 |
< |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
179 |
< |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
193 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
194 |
|
d = normalize(direc); |
195 |
|
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
196 |
|
case VT_ANG: /* angular fisheye */ |
197 |
< |
x *= v->horiz/180.0; |
198 |
< |
y *= v->vert/180.0; |
197 |
> |
x *= (1.0/180.0)*v->horiz; |
198 |
> |
y *= (1.0/180.0)*v->vert; |
199 |
|
d = x*x + y*y; |
200 |
|
if (d > 1.0) |
201 |
|
return(-1.0); |
202 |
|
d = sqrt(d); |
203 |
|
z = cos(PI*d); |
204 |
< |
d = d <= FTINY ? PI : sqrt(1 - z*z)/d; |
204 |
> |
d = d <= FTINY ? PI : sqrt(1.0 - z*z)/d; |
205 |
|
x *= d; |
206 |
|
y *= d; |
207 |
|
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
208 |
|
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
209 |
|
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
210 |
< |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
197 |
< |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
198 |
< |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
210 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
211 |
|
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
212 |
+ |
case VT_PLS: /* planispheric fisheye */ |
213 |
+ |
x *= sqrt(v->hn2); |
214 |
+ |
y *= sqrt(v->vn2); |
215 |
+ |
d = x*x + y*y; |
216 |
+ |
z = (1. - d)/(1. + d); |
217 |
+ |
x *= (1. + z); |
218 |
+ |
y *= (1. + z); |
219 |
+ |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
220 |
+ |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
221 |
+ |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
222 |
+ |
VSUM(orig, v->vp, direc, v->vfore); |
223 |
+ |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
224 |
|
} |
225 |
|
return(-1.0); |
226 |
|
} |
227 |
|
|
228 |
|
|
229 |
< |
void |
230 |
< |
viewloc(ip, v, p) /* find image location for point */ |
231 |
< |
FVECT ip; |
232 |
< |
register VIEW *v; |
233 |
< |
FVECT p; |
229 |
> |
int |
230 |
> |
viewloc( /* find image location for point */ |
231 |
> |
FVECT ip, |
232 |
> |
VIEW *v, |
233 |
> |
FVECT p |
234 |
> |
) |
235 |
|
{ |
236 |
+ |
int rval; |
237 |
|
double d, d2; |
238 |
|
FVECT disp; |
239 |
|
|
240 |
< |
disp[0] = p[0] - v->vp[0]; |
215 |
< |
disp[1] = p[1] - v->vp[1]; |
216 |
< |
disp[2] = p[2] - v->vp[2]; |
240 |
> |
VSUB(disp, p, v->vp); |
241 |
|
|
242 |
|
switch (v->type) { |
243 |
|
case VT_PAR: /* parallel view */ |
246 |
|
case VT_PER: /* perspective view */ |
247 |
|
d = DOT(disp,v->vdir); |
248 |
|
ip[2] = VLEN(disp); |
249 |
< |
if (d < 0.0) { /* fold pyramid */ |
249 |
> |
if (d < -FTINY) { /* fold pyramid */ |
250 |
|
ip[2] = -ip[2]; |
251 |
|
d = -d; |
252 |
< |
} |
253 |
< |
if (d > FTINY) { |
254 |
< |
d = 1.0/d; |
255 |
< |
disp[0] *= d; |
256 |
< |
disp[1] *= d; |
257 |
< |
disp[2] *= d; |
258 |
< |
} |
252 |
> |
} else if (d <= FTINY) |
253 |
> |
return(0); /* at infinite edge */ |
254 |
> |
d = 1.0/d; |
255 |
> |
disp[0] *= d; |
256 |
> |
disp[1] *= d; |
257 |
> |
disp[2] *= d; |
258 |
> |
if (ip[2] < 0.0) d = -d; |
259 |
|
ip[2] *= (1.0 - v->vfore*d); |
260 |
|
break; |
261 |
|
case VT_HEM: /* hemispherical fisheye */ |
270 |
|
d = DOT(disp,v->hvec); |
271 |
|
d2 = DOT(disp,v->vdir); |
272 |
|
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
273 |
< |
d = 1.0/sqrt(d*d + d2*d2); |
273 |
> |
d = d*d + d2*d2; |
274 |
> |
if (d <= FTINY*FTINY) |
275 |
> |
return(0); /* at pole */ |
276 |
> |
d = 1.0/sqrt(d); |
277 |
|
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
278 |
|
ip[2] = VLEN(disp); |
279 |
|
ip[2] *= (1.0 - v->vfore*d); |
280 |
< |
return; |
280 |
> |
goto gotall; |
281 |
|
case VT_ANG: /* angular fisheye */ |
282 |
|
ip[0] = 0.5 - v->hoff; |
283 |
|
ip[1] = 0.5 - v->voff; |
284 |
|
ip[2] = normalize(disp) - v->vfore; |
285 |
|
d = DOT(disp,v->vdir); |
286 |
|
if (d >= 1.0-FTINY) |
287 |
< |
return; |
287 |
> |
goto gotall; |
288 |
|
if (d <= -(1.0-FTINY)) { |
289 |
|
ip[0] += 180.0/v->horiz; |
290 |
< |
return; |
290 |
> |
goto gotall; |
291 |
|
} |
292 |
< |
d = acos(d)/PI / sqrt(1.0 - d*d); |
293 |
< |
ip[0] += DOT(disp,v->hvec)*d*180.0/v->horiz; |
294 |
< |
ip[1] += DOT(disp,v->vvec)*d*180.0/v->vert; |
295 |
< |
return; |
292 |
> |
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
293 |
> |
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
294 |
> |
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
295 |
> |
goto gotall; |
296 |
> |
case VT_PLS: /* planispheric fisheye */ |
297 |
> |
ip[0] = 0.5 - v->hoff; |
298 |
> |
ip[1] = 0.5 - v->voff; |
299 |
> |
ip[2] = normalize(disp) - v->vfore; |
300 |
> |
d = DOT(disp,v->vdir); |
301 |
> |
if (d >= 1.0-FTINY) |
302 |
> |
goto gotall; |
303 |
> |
if (d <= -(1.0-FTINY)) |
304 |
> |
return(0); |
305 |
> |
ip[0] += DOT(disp,v->hvec)/((1. + d)*sqrt(v->hn2)); |
306 |
> |
ip[1] += DOT(disp,v->vvec)/((1. + d)*sqrt(v->vn2)); |
307 |
> |
goto gotall; |
308 |
|
} |
309 |
|
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
310 |
|
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
311 |
+ |
gotall: /* return negative if behind */ |
312 |
+ |
rval = 1 - 2*(ip[2] <= 0.0); |
313 |
+ |
if ((0.0 > ip[0]) | (ip[0] > 1.0) || (0.0 > ip[1]) | (ip[1] > 1.0)) |
314 |
+ |
return 2*rval; /* +/-2 if outside frame */ |
315 |
+ |
return rval; |
316 |
|
} |
317 |
|
|
318 |
|
|
319 |
|
void |
320 |
< |
pix2loc(loc, rp, px, py) /* compute image location from pixel pos. */ |
321 |
< |
RREAL loc[2]; |
322 |
< |
register RESOLU *rp; |
323 |
< |
int px, py; |
320 |
> |
pix2loc( /* compute image location from pixel pos. */ |
321 |
> |
RREAL loc[2], |
322 |
> |
RESOLU *rp, |
323 |
> |
int px, |
324 |
> |
int py |
325 |
> |
) |
326 |
|
{ |
327 |
< |
register int x, y; |
327 |
> |
int x, y; |
328 |
|
|
329 |
|
if (rp->rt & YMAJOR) { |
330 |
|
x = px; |
343 |
|
|
344 |
|
|
345 |
|
void |
346 |
< |
loc2pix(pp, rp, lx, ly) /* compute pixel pos. from image location */ |
347 |
< |
int pp[2]; |
348 |
< |
register RESOLU *rp; |
349 |
< |
double lx, ly; |
346 |
> |
loc2pix( /* compute pixel pos. from image location */ |
347 |
> |
int pp[2], |
348 |
> |
RESOLU *rp, |
349 |
> |
double lx, |
350 |
> |
double ly |
351 |
> |
) |
352 |
|
{ |
353 |
< |
register int x, y; |
353 |
> |
int x, y; |
354 |
|
|
355 |
< |
x = lx * rp->xr; |
356 |
< |
y = ly * rp->yr; |
355 |
> |
x = (int)(lx*rp->xr + .5 - (lx < 0.0)); |
356 |
> |
y = (int)(ly*rp->yr + .5 - (ly < 0.0)); |
357 |
> |
|
358 |
|
if (rp->rt & XDECR) |
359 |
|
x = rp->xr-1 - x; |
360 |
|
if (rp->rt & YDECR) |
370 |
|
|
371 |
|
|
372 |
|
int |
373 |
< |
getviewopt(v, ac, av) /* process view argument */ |
374 |
< |
register VIEW *v; |
375 |
< |
int ac; |
376 |
< |
register char *av[]; |
373 |
> |
getviewopt( /* process view argument */ |
374 |
> |
VIEW *v, |
375 |
> |
int ac, |
376 |
> |
char *av[] |
377 |
> |
) |
378 |
|
{ |
379 |
|
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
380 |
|
badarg(ac-1,av+1,l)) return(-1) |
439 |
|
|
440 |
|
|
441 |
|
int |
442 |
< |
sscanview(vp, s) /* get view parameters from string */ |
443 |
< |
VIEW *vp; |
444 |
< |
register char *s; |
442 |
> |
sscanview( /* get view parameters from string */ |
443 |
> |
VIEW *vp, |
444 |
> |
char *s |
445 |
> |
) |
446 |
|
{ |
447 |
|
int ac; |
448 |
|
char *av[4]; |
449 |
|
int na; |
450 |
|
int nvopts = 0; |
451 |
|
|
452 |
< |
while (*s == ' ') |
453 |
< |
s++; |
454 |
< |
if (*s != '-') |
404 |
< |
s = sskip2(s,1); |
452 |
> |
while (isspace(*s)) |
453 |
> |
if (!*s++) |
454 |
> |
return(0); |
455 |
|
while (*s) { |
456 |
|
ac = 0; |
457 |
|
do { |
458 |
|
if (ac || *s == '-') |
459 |
|
av[ac++] = s; |
460 |
< |
while (*s && *s != ' ') |
460 |
> |
while (*s && !isspace(*s)) |
461 |
|
s++; |
462 |
< |
while (*s == ' ') |
462 |
> |
while (isspace(*s)) |
463 |
|
s++; |
464 |
|
} while (*s && ac < 4); |
465 |
|
if ((na = getviewopt(vp, ac, av)) >= 0) { |
474 |
|
|
475 |
|
|
476 |
|
void |
477 |
< |
fprintview(vp, fp) /* write out view parameters */ |
478 |
< |
register VIEW *vp; |
479 |
< |
FILE *fp; |
477 |
> |
fprintview( /* write out view parameters */ |
478 |
> |
VIEW *vp, |
479 |
> |
FILE *fp |
480 |
> |
) |
481 |
|
{ |
482 |
|
fprintf(fp, " -vt%c", vp->type); |
483 |
|
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
492 |
|
|
493 |
|
|
494 |
|
char * |
495 |
< |
viewopt(vp) /* translate to minimal view string */ |
496 |
< |
register VIEW *vp; |
495 |
> |
viewopt( /* translate to minimal view string */ |
496 |
> |
VIEW *vp |
497 |
> |
) |
498 |
|
{ |
499 |
|
static char vwstr[128]; |
500 |
< |
register char *cp = vwstr; |
500 |
> |
char *cp = vwstr; |
501 |
|
|
502 |
+ |
*cp = '\0'; |
503 |
|
if (vp->type != stdview.type) { |
504 |
|
sprintf(cp, " -vt%c", vp->type); |
505 |
|
cp += strlen(cp); |
550 |
|
|
551 |
|
|
552 |
|
int |
553 |
< |
isview(s) /* is this a view string? */ |
554 |
< |
char *s; |
553 |
> |
isview( /* is this a view string? */ |
554 |
> |
char *s |
555 |
> |
) |
556 |
|
{ |
557 |
|
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
558 |
|
extern char *progname; |
559 |
< |
register char *cp; |
560 |
< |
register char **an; |
559 |
> |
char *cp; |
560 |
> |
char **an; |
561 |
|
/* add program name to list */ |
562 |
|
if (altname[0] == NULL) { |
563 |
|
for (cp = progname; *cp; cp++) |
598 |
|
|
599 |
|
|
600 |
|
int |
601 |
< |
viewfile(fname, vp, rp) /* get view from file */ |
602 |
< |
char *fname; |
603 |
< |
VIEW *vp; |
604 |
< |
RESOLU *rp; |
601 |
> |
viewfile( /* get view from file */ |
602 |
> |
char *fname, |
603 |
> |
VIEW *vp, |
604 |
> |
RESOLU *rp |
605 |
> |
) |
606 |
|
{ |
607 |
|
struct myview mvs; |
608 |
|
FILE *fp; |