1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.16 |
static const char RCSid[] = "$Id: rv3.c,v 2.15 2005/01/21 00:52:59 greg Exp $"; |
3 |
greg |
1.1 |
#endif |
4 |
|
|
/* |
5 |
|
|
* rv3.c - miscellaneous routines for rview. |
6 |
|
|
* |
7 |
greg |
2.10 |
* External symbols declared in rpaint.h |
8 |
|
|
*/ |
9 |
|
|
|
10 |
greg |
2.11 |
#include "copyright.h" |
11 |
greg |
1.1 |
|
12 |
schorsch |
2.12 |
#include <string.h> |
13 |
|
|
|
14 |
greg |
1.1 |
#include "ray.h" |
15 |
|
|
#include "rpaint.h" |
16 |
|
|
#include "random.h" |
17 |
greg |
1.7 |
|
18 |
greg |
1.13 |
#ifndef WFLUSH |
19 |
greg |
2.4 |
#ifdef SPEED |
20 |
|
|
#define WFLUSH (5*SPEED) |
21 |
|
|
#else |
22 |
|
|
#define WFLUSH 100 /* flush after this many rays */ |
23 |
|
|
#endif |
24 |
greg |
1.13 |
#endif |
25 |
greg |
1.7 |
|
26 |
greg |
2.2 |
#ifdef SMLFLT |
27 |
|
|
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
28 |
|
|
#else |
29 |
|
|
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
30 |
|
|
#endif |
31 |
greg |
1.13 |
|
32 |
greg |
2.2 |
|
33 |
greg |
2.10 |
int |
34 |
greg |
1.7 |
getrect(s, r) /* get a box */ |
35 |
|
|
char *s; |
36 |
|
|
register RECT *r; |
37 |
|
|
{ |
38 |
|
|
int x0, y0, x1, y1; |
39 |
|
|
|
40 |
|
|
if (*s && !strncmp(s, "all", strlen(s))) { |
41 |
|
|
r->l = r->d = 0; |
42 |
greg |
1.9 |
r->r = hresolu; |
43 |
|
|
r->u = vresolu; |
44 |
greg |
1.7 |
return(0); |
45 |
|
|
} |
46 |
|
|
if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
47 |
|
|
if (dev->getcur == NULL) |
48 |
|
|
return(-1); |
49 |
|
|
(*dev->comout)("Pick first corner\n"); |
50 |
|
|
if ((*dev->getcur)(&x0, &y0) == ABORT) |
51 |
|
|
return(-1); |
52 |
|
|
(*dev->comout)("Pick second corner\n"); |
53 |
|
|
if ((*dev->getcur)(&x1, &y1) == ABORT) |
54 |
|
|
return(-1); |
55 |
|
|
} |
56 |
|
|
if (x0 < x1) { |
57 |
|
|
r->l = x0; |
58 |
|
|
r->r = x1; |
59 |
|
|
} else { |
60 |
|
|
r->l = x1; |
61 |
|
|
r->r = x0; |
62 |
|
|
} |
63 |
|
|
if (y0 < y1) { |
64 |
|
|
r->d = y0; |
65 |
|
|
r->u = y1; |
66 |
|
|
} else { |
67 |
|
|
r->d = y1; |
68 |
|
|
r->u = y0; |
69 |
|
|
} |
70 |
|
|
if (r->l < 0) r->l = 0; |
71 |
|
|
if (r->d < 0) r->d = 0; |
72 |
greg |
1.9 |
if (r->r > hresolu) r->r = hresolu; |
73 |
|
|
if (r->u > vresolu) r->u = vresolu; |
74 |
greg |
1.7 |
if (r->l > r->r) r->l = r->r; |
75 |
|
|
if (r->d > r->u) r->d = r->u; |
76 |
|
|
return(0); |
77 |
|
|
} |
78 |
|
|
|
79 |
|
|
|
80 |
greg |
2.10 |
int |
81 |
greg |
1.7 |
getinterest(s, direc, vec, mp) /* get area of interest */ |
82 |
|
|
char *s; |
83 |
|
|
int direc; |
84 |
|
|
FVECT vec; |
85 |
|
|
double *mp; |
86 |
|
|
{ |
87 |
|
|
int x, y; |
88 |
|
|
RAY thisray; |
89 |
|
|
register int i; |
90 |
|
|
|
91 |
|
|
if (sscanf(s, "%lf", mp) != 1) |
92 |
|
|
*mp = 1.0; |
93 |
|
|
else if (*mp < -FTINY) /* negative zoom is reduction */ |
94 |
|
|
*mp = -1.0 / *mp; |
95 |
|
|
else if (*mp <= FTINY) { /* too small */ |
96 |
|
|
error(COMMAND, "illegal magnification"); |
97 |
|
|
return(-1); |
98 |
|
|
} |
99 |
greg |
2.2 |
if (!sscanvec(sskip(s), vec)) { |
100 |
greg |
1.7 |
if (dev->getcur == NULL) |
101 |
|
|
return(-1); |
102 |
|
|
(*dev->comout)("Pick view center\n"); |
103 |
|
|
if ((*dev->getcur)(&x, &y) == ABORT) |
104 |
|
|
return(-1); |
105 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
106 |
|
|
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
107 |
greg |
1.17 |
error(COMMAND, "not on image"); |
108 |
|
|
return(-1); |
109 |
|
|
} |
110 |
greg |
1.7 |
if (!direc || ourview.type == VT_PAR) { |
111 |
|
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
112 |
|
|
if (!localhit(&thisray, &thescene)) { |
113 |
|
|
error(COMMAND, "not a local object"); |
114 |
|
|
return(-1); |
115 |
|
|
} |
116 |
|
|
} |
117 |
|
|
if (direc) |
118 |
|
|
if (ourview.type == VT_PAR) |
119 |
|
|
for (i = 0; i < 3; i++) |
120 |
|
|
vec[i] = thisray.rop[i] - ourview.vp[i]; |
121 |
|
|
else |
122 |
|
|
VCOPY(vec, thisray.rdir); |
123 |
|
|
else |
124 |
|
|
VCOPY(vec, thisray.rop); |
125 |
greg |
2.15 |
} else if (direc) { |
126 |
|
|
for (i = 0; i < 3; i++) |
127 |
|
|
vec[i] -= ourview.vp[i]; |
128 |
|
|
if (normalize(vec) == 0.0) { |
129 |
|
|
error(COMMAND, "point at view origin"); |
130 |
|
|
return(-1); |
131 |
|
|
} |
132 |
|
|
} |
133 |
greg |
1.7 |
return(0); |
134 |
|
|
} |
135 |
greg |
1.1 |
|
136 |
|
|
|
137 |
|
|
float * /* keep consistent with COLOR typedef */ |
138 |
|
|
greyof(col) /* convert color to greyscale */ |
139 |
|
|
register COLOR col; |
140 |
|
|
{ |
141 |
|
|
static COLOR gcol; |
142 |
|
|
double b; |
143 |
|
|
|
144 |
|
|
b = bright(col); |
145 |
|
|
setcolor(gcol, b, b, b); |
146 |
|
|
return(gcol); |
147 |
|
|
} |
148 |
|
|
|
149 |
|
|
|
150 |
greg |
2.10 |
void |
151 |
greg |
1.1 |
paint(p, xmin, ymin, xmax, ymax) /* compute and paint a rectangle */ |
152 |
|
|
register PNODE *p; |
153 |
|
|
int xmin, ymin, xmax, ymax; |
154 |
|
|
{ |
155 |
greg |
2.5 |
static unsigned long lastflush = 0; |
156 |
greg |
1.1 |
static RAY thisray; |
157 |
|
|
double h, v; |
158 |
|
|
|
159 |
|
|
if (xmax - xmin <= 0 || ymax - ymin <= 0) { /* empty */ |
160 |
|
|
p->x = xmin; |
161 |
|
|
p->y = ymin; |
162 |
|
|
setcolor(p->v, 0.0, 0.0, 0.0); |
163 |
|
|
return; |
164 |
|
|
} |
165 |
|
|
/* jitter ray direction */ |
166 |
greg |
1.15 |
h = xmin + (xmax-xmin)*frandom(); |
167 |
|
|
v = ymin + (ymax-ymin)*frandom(); |
168 |
greg |
1.1 |
|
169 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
170 |
|
|
h/hresolu, v/vresolu)) < -FTINY) { |
171 |
greg |
1.17 |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
172 |
|
|
} else { |
173 |
|
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
174 |
greg |
1.20 |
samplendx++; |
175 |
greg |
1.17 |
rayvalue(&thisray); |
176 |
|
|
} |
177 |
greg |
1.1 |
|
178 |
greg |
1.15 |
p->x = h; |
179 |
|
|
p->y = v; |
180 |
greg |
1.1 |
copycolor(p->v, thisray.rcol); |
181 |
|
|
scalecolor(p->v, exposure); |
182 |
|
|
|
183 |
|
|
(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
184 |
greg |
1.13 |
|
185 |
|
|
if (dev->flush != NULL && nrays - lastflush >= WFLUSH) { |
186 |
|
|
lastflush = nrays; |
187 |
|
|
(*dev->flush)(); |
188 |
|
|
} |
189 |
greg |
1.1 |
} |
190 |
|
|
|
191 |
|
|
|
192 |
greg |
2.10 |
void |
193 |
greg |
1.1 |
newimage() /* start a new image */ |
194 |
|
|
{ |
195 |
|
|
/* free old image */ |
196 |
|
|
freepkids(&ptrunk); |
197 |
greg |
1.19 |
/* save reserve memory */ |
198 |
|
|
fillreserves(); |
199 |
greg |
1.9 |
/* compute resolution */ |
200 |
greg |
1.10 |
hresolu = dev->xsiz; |
201 |
|
|
vresolu = dev->ysiz; |
202 |
greg |
1.11 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
203 |
greg |
1.1 |
pframe.l = pframe.d = 0; |
204 |
greg |
1.9 |
pframe.r = hresolu; pframe.u = vresolu; |
205 |
greg |
1.1 |
pdepth = 0; |
206 |
|
|
/* clear device */ |
207 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
208 |
greg |
1.1 |
/* get first value */ |
209 |
greg |
1.9 |
paint(&ptrunk, 0, 0, hresolu, vresolu); |
210 |
greg |
1.1 |
} |
211 |
|
|
|
212 |
|
|
|
213 |
greg |
2.10 |
void |
214 |
greg |
1.1 |
redraw() /* redraw the image */ |
215 |
|
|
{ |
216 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
217 |
greg |
1.1 |
(*dev->comout)("redrawing...\n"); |
218 |
greg |
1.9 |
repaint(0, 0, hresolu, vresolu); |
219 |
greg |
1.1 |
(*dev->comout)("\n"); |
220 |
|
|
} |
221 |
|
|
|
222 |
|
|
|
223 |
greg |
2.10 |
void |
224 |
greg |
1.1 |
repaint(xmin, ymin, xmax, ymax) /* repaint a region */ |
225 |
|
|
int xmin, ymin, xmax, ymax; |
226 |
|
|
{ |
227 |
|
|
RECT reg; |
228 |
|
|
|
229 |
|
|
reg.l = xmin; reg.r = xmax; |
230 |
|
|
reg.d = ymin; reg.u = ymax; |
231 |
|
|
|
232 |
greg |
1.9 |
paintrect(&ptrunk, 0, 0, hresolu, vresolu, ®); |
233 |
greg |
1.1 |
} |
234 |
|
|
|
235 |
|
|
|
236 |
greg |
2.10 |
void |
237 |
greg |
1.1 |
paintrect(p, xmin, ymin, xmax, ymax, r) /* paint picture rectangle */ |
238 |
|
|
register PNODE *p; |
239 |
|
|
int xmin, ymin, xmax, ymax; |
240 |
|
|
register RECT *r; |
241 |
|
|
{ |
242 |
|
|
int mx, my; |
243 |
|
|
|
244 |
|
|
if (xmax - xmin <= 0 || ymax - ymin <= 0) |
245 |
|
|
return; |
246 |
|
|
|
247 |
|
|
if (p->kid == NULL) { |
248 |
|
|
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
249 |
|
|
xmin, ymin, xmax, ymax); /* do this */ |
250 |
|
|
return; |
251 |
|
|
} |
252 |
|
|
mx = (xmin + xmax) >> 1; /* do kids */ |
253 |
|
|
my = (ymin + ymax) >> 1; |
254 |
|
|
if (mx > r->l) { |
255 |
|
|
if (my > r->d) |
256 |
|
|
paintrect(p->kid+DL, xmin, ymin, mx, my, r); |
257 |
|
|
if (my < r->u) |
258 |
|
|
paintrect(p->kid+UL, xmin, my, mx, ymax, r); |
259 |
|
|
} |
260 |
|
|
if (mx < r->r) { |
261 |
|
|
if (my > r->d) |
262 |
|
|
paintrect(p->kid+DR, mx, ymin, xmax, my, r); |
263 |
|
|
if (my < r->u) |
264 |
|
|
paintrect(p->kid+UR, mx, my, xmax, ymax, r); |
265 |
|
|
} |
266 |
|
|
} |
267 |
|
|
|
268 |
|
|
|
269 |
|
|
PNODE * |
270 |
|
|
findrect(x, y, p, r, pd) /* find a rectangle */ |
271 |
|
|
int x, y; |
272 |
|
|
register PNODE *p; |
273 |
|
|
register RECT *r; |
274 |
|
|
int pd; |
275 |
|
|
{ |
276 |
|
|
int mx, my; |
277 |
|
|
|
278 |
|
|
while (p->kid != NULL && pd--) { |
279 |
|
|
|
280 |
|
|
mx = (r->l + r->r) >> 1; |
281 |
|
|
my = (r->d + r->u) >> 1; |
282 |
|
|
|
283 |
|
|
if (x < mx) { |
284 |
|
|
r->r = mx; |
285 |
|
|
if (y < my) { |
286 |
|
|
r->u = my; |
287 |
|
|
p = p->kid+DL; |
288 |
|
|
} else { |
289 |
|
|
r->d = my; |
290 |
|
|
p = p->kid+UL; |
291 |
|
|
} |
292 |
|
|
} else { |
293 |
|
|
r->l = mx; |
294 |
|
|
if (y < my) { |
295 |
|
|
r->u = my; |
296 |
|
|
p = p->kid+DR; |
297 |
|
|
} else { |
298 |
|
|
r->d = my; |
299 |
|
|
p = p->kid+UR; |
300 |
|
|
} |
301 |
|
|
} |
302 |
|
|
} |
303 |
|
|
return(p); |
304 |
|
|
} |
305 |
|
|
|
306 |
|
|
|
307 |
greg |
2.10 |
void |
308 |
greg |
1.1 |
scalepict(p, sf) /* scale picture values */ |
309 |
|
|
register PNODE *p; |
310 |
|
|
double sf; |
311 |
|
|
{ |
312 |
|
|
scalecolor(p->v, sf); /* do this node */ |
313 |
|
|
|
314 |
|
|
if (p->kid == NULL) |
315 |
|
|
return; |
316 |
|
|
/* do children */ |
317 |
|
|
scalepict(p->kid+DL, sf); |
318 |
|
|
scalepict(p->kid+DR, sf); |
319 |
|
|
scalepict(p->kid+UL, sf); |
320 |
|
|
scalepict(p->kid+UR, sf); |
321 |
|
|
} |
322 |
|
|
|
323 |
|
|
|
324 |
greg |
2.10 |
void |
325 |
greg |
1.1 |
getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
326 |
|
|
int yoff; |
327 |
|
|
register COLR *scan; |
328 |
|
|
register PNODE *p; |
329 |
|
|
int xsiz, ysiz; |
330 |
|
|
{ |
331 |
|
|
register int mx; |
332 |
|
|
int my; |
333 |
|
|
|
334 |
|
|
if (p->kid == NULL) { /* do this node */ |
335 |
|
|
setcolr(scan[0], colval(p->v,RED), |
336 |
|
|
colval(p->v,GRN), |
337 |
|
|
colval(p->v,BLU)); |
338 |
|
|
for (mx = 1; mx < xsiz; mx++) |
339 |
|
|
copycolr(scan[mx], scan[0]); |
340 |
|
|
return; |
341 |
|
|
} |
342 |
|
|
/* do kids */ |
343 |
|
|
mx = xsiz >> 1; |
344 |
|
|
my = ysiz >> 1; |
345 |
|
|
if (yoff < my) { |
346 |
|
|
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
347 |
|
|
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
348 |
|
|
} else { |
349 |
|
|
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
350 |
|
|
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
351 |
|
|
} |
352 |
|
|
} |
353 |
|
|
|
354 |
|
|
|
355 |
greg |
2.10 |
void |
356 |
greg |
1.1 |
freepkids(p) /* free pnode's children */ |
357 |
|
|
register PNODE *p; |
358 |
|
|
{ |
359 |
|
|
if (p->kid == NULL) |
360 |
|
|
return; |
361 |
|
|
freepkids(p->kid+DL); |
362 |
|
|
freepkids(p->kid+DR); |
363 |
|
|
freepkids(p->kid+UL); |
364 |
|
|
freepkids(p->kid+UR); |
365 |
greg |
2.10 |
free((void *)p->kid); |
366 |
greg |
1.1 |
p->kid = NULL; |
367 |
|
|
} |
368 |
|
|
|
369 |
|
|
|
370 |
greg |
2.10 |
void |
371 |
greg |
1.1 |
newview(vp) /* change viewing parameters */ |
372 |
|
|
register VIEW *vp; |
373 |
|
|
{ |
374 |
|
|
char *err; |
375 |
|
|
|
376 |
greg |
1.6 |
if ((err = setview(vp)) != NULL) { |
377 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err); |
378 |
|
|
error(COMMAND, errmsg); |
379 |
schorsch |
2.12 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
380 |
schorsch |
2.13 |
oldview = ourview; |
381 |
|
|
ourview = *vp; |
382 |
greg |
1.14 |
newimage(); |
383 |
greg |
1.1 |
} |
384 |
|
|
} |
385 |
|
|
|
386 |
|
|
|
387 |
greg |
2.10 |
void |
388 |
greg |
1.4 |
moveview(angle, elev, mag, vc) /* move viewpoint */ |
389 |
|
|
double angle, elev, mag; |
390 |
greg |
1.1 |
FVECT vc; |
391 |
|
|
{ |
392 |
|
|
double d; |
393 |
greg |
1.4 |
FVECT v1; |
394 |
greg |
2.14 |
VIEW nv = ourview; |
395 |
greg |
1.1 |
register int i; |
396 |
|
|
|
397 |
|
|
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
398 |
greg |
1.4 |
if (elev != 0.0) { |
399 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir); |
400 |
greg |
1.4 |
normalize(v1); |
401 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
402 |
|
|
} |
403 |
greg |
2.15 |
if (nv.type == VT_PAR) { |
404 |
|
|
nv.horiz /= mag; |
405 |
|
|
nv.vert /= mag; |
406 |
greg |
1.3 |
d = 0.0; /* don't move closer */ |
407 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
408 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
409 |
greg |
1.1 |
} else { |
410 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
411 |
greg |
2.15 |
if (nv.vfore > FTINY) { |
412 |
greg |
2.8 |
nv.vfore += d - d*mag; |
413 |
|
|
if (nv.vfore < 0.0) nv.vfore = 0.0; |
414 |
|
|
} |
415 |
greg |
2.15 |
if (nv.vaft > FTINY) { |
416 |
greg |
2.8 |
nv.vaft += d - d*mag; |
417 |
|
|
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
418 |
|
|
} |
419 |
greg |
2.16 |
nv.vdist /= mag; |
420 |
greg |
1.1 |
} |
421 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
422 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
423 |
greg |
1.1 |
newview(&nv); |
424 |
greg |
1.17 |
} |
425 |
|
|
|
426 |
|
|
|
427 |
greg |
2.10 |
void |
428 |
|
|
pcopy(p1, p2) /* copy paint node p1 into p2 */ |
429 |
|
|
register PNODE *p1, *p2; |
430 |
|
|
{ |
431 |
|
|
copycolor(p2->v, p1->v); |
432 |
|
|
p2->x = p1->x; |
433 |
|
|
p2->y = p1->y; |
434 |
|
|
} |
435 |
|
|
|
436 |
|
|
|
437 |
|
|
void |
438 |
greg |
2.9 |
zoomview(vp, zf) /* zoom in or out */ |
439 |
greg |
1.17 |
register VIEW *vp; |
440 |
|
|
double zf; |
441 |
|
|
{ |
442 |
|
|
switch (vp->type) { |
443 |
|
|
case VT_PAR: /* parallel view */ |
444 |
greg |
2.9 |
vp->horiz /= zf; |
445 |
|
|
vp->vert /= zf; |
446 |
|
|
return; |
447 |
greg |
1.17 |
case VT_ANG: /* angular fisheye */ |
448 |
|
|
vp->horiz /= zf; |
449 |
greg |
2.9 |
if (vp->horiz > 360.) |
450 |
|
|
vp->horiz = 360.; |
451 |
greg |
1.17 |
vp->vert /= zf; |
452 |
greg |
2.9 |
if (vp->vert > 360.) |
453 |
|
|
vp->vert = 360.; |
454 |
|
|
return; |
455 |
|
|
case VT_CYL: /* cylindrical panorama */ |
456 |
|
|
vp->horiz /= zf; |
457 |
|
|
if (vp->horiz > 360.) |
458 |
|
|
vp->horiz = 360.; |
459 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
460 |
greg |
1.17 |
return; |
461 |
|
|
case VT_PER: /* perspective view */ |
462 |
|
|
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
463 |
|
|
(PI/180./2.); |
464 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
465 |
|
|
(PI/180./2.); |
466 |
|
|
return; |
467 |
|
|
case VT_HEM: /* hemispherical fisheye */ |
468 |
|
|
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
469 |
|
|
if (vp->horiz >= 1.0-FTINY) |
470 |
|
|
vp->horiz = 180.; |
471 |
|
|
else |
472 |
|
|
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
473 |
|
|
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
474 |
|
|
if (vp->vert >= 1.0-FTINY) |
475 |
|
|
vp->vert = 180.; |
476 |
|
|
else |
477 |
|
|
vp->vert = asin(vp->vert) / (PI/180./2.); |
478 |
|
|
return; |
479 |
|
|
} |
480 |
greg |
1.1 |
} |