31 |
|
VIEW theirview = STDVIEW(512); /* input view */ |
32 |
|
int gotview; /* got input view? */ |
33 |
|
|
34 |
+ |
double theirs2ours[4][4]; /* transformation matrix */ |
35 |
|
|
36 |
+ |
|
37 |
|
main(argc, argv) /* interpolate pictures */ |
38 |
|
int argc; |
39 |
|
char *argv[]; |
51 |
|
check(2,1); |
52 |
|
zeps = atof(argv[++i]); |
53 |
|
break; |
54 |
+ |
case 'x': /* x resolution */ |
55 |
+ |
check(2,1); |
56 |
+ |
ourview.hresolu = atoi(argv[++i]); |
57 |
+ |
break; |
58 |
+ |
case 'y': /* y resolution */ |
59 |
+ |
check(2,1); |
60 |
+ |
ourview.vresolu = atoi(argv[++i]); |
61 |
+ |
break; |
62 |
|
case 'v': /* view */ |
63 |
|
switch (argv[i][2]) { |
64 |
|
case 't': /* type */ |
201 |
|
fprintf(stderr, "%s: %s\n", pfile, err); |
202 |
|
exit(1); |
203 |
|
} |
204 |
+ |
/* compute transformation */ |
205 |
+ |
pixform(theirs2ours, &theirview, &ourview); |
206 |
|
/* allocate scanlines */ |
207 |
|
scanin = (COLR *)malloc(xres*sizeof(COLR)); |
208 |
|
zin = (float *)malloc(xres*sizeof(float)); |
230 |
|
} |
231 |
|
|
232 |
|
|
233 |
+ |
pixform(xfmat, vw1, vw2) /* compute view1 to view2 matrix */ |
234 |
+ |
register double xfmat[4][4]; |
235 |
+ |
register VIEW *vw1, *vw2; |
236 |
+ |
{ |
237 |
+ |
double m4t[4][4]; |
238 |
+ |
|
239 |
+ |
setident4(xfmat); |
240 |
+ |
xfmat[0][0] = vw1->vhinc[0]; |
241 |
+ |
xfmat[0][1] = vw1->vhinc[1]; |
242 |
+ |
xfmat[0][2] = vw1->vhinc[2]; |
243 |
+ |
xfmat[1][0] = vw1->vvinc[0]; |
244 |
+ |
xfmat[1][1] = vw1->vvinc[1]; |
245 |
+ |
xfmat[1][2] = vw1->vvinc[2]; |
246 |
+ |
xfmat[2][0] = vw1->vdir[0]; |
247 |
+ |
xfmat[2][1] = vw1->vdir[1]; |
248 |
+ |
xfmat[2][2] = vw1->vdir[2]; |
249 |
+ |
xfmat[3][0] = vw1->vp[0]; |
250 |
+ |
xfmat[3][1] = vw1->vp[1]; |
251 |
+ |
xfmat[3][2] = vw1->vp[2]; |
252 |
+ |
setident4(m4t); |
253 |
+ |
m4t[0][0] = vw2->vhinc[0]/vw2->vhn2; |
254 |
+ |
m4t[1][0] = vw2->vhinc[1]/vw2->vhn2; |
255 |
+ |
m4t[2][0] = vw2->vhinc[2]/vw2->vhn2; |
256 |
+ |
m4t[3][0] = -DOT(vw2->vp,vw2->vhinc)/vw2->vhn2; |
257 |
+ |
m4t[0][1] = vw2->vvinc[0]/vw2->vvn2; |
258 |
+ |
m4t[1][1] = vw2->vvinc[1]/vw2->vvn2; |
259 |
+ |
m4t[2][1] = vw2->vvinc[2]/vw2->vvn2; |
260 |
+ |
m4t[3][1] = -DOT(vw2->vp,vw2->vvinc)/vw2->vvn2; |
261 |
+ |
m4t[0][2] = vw2->vdir[0]; |
262 |
+ |
m4t[1][2] = vw2->vdir[1]; |
263 |
+ |
m4t[2][2] = vw2->vdir[2]; |
264 |
+ |
m4t[3][2] = -DOT(vw2->vp,vw2->vdir); |
265 |
+ |
multmat4(xfmat, xfmat, m4t); |
266 |
+ |
} |
267 |
+ |
|
268 |
+ |
|
269 |
|
addscanline(y, pline, zline) /* add scanline to output */ |
270 |
|
int y; |
271 |
|
COLR *pline; |
272 |
|
float *zline; |
273 |
|
{ |
274 |
< |
FVECT p, dir; |
275 |
< |
double xnew, ynew, znew; |
274 |
> |
extern double sqrt(); |
275 |
> |
double pos[3]; |
276 |
|
register int x; |
277 |
|
register int xpos, ypos; |
278 |
|
|
279 |
|
for (x = 0; x < theirview.hresolu; x++) { |
280 |
< |
rayview(p, dir, &theirview, x+.5, y+.5); |
281 |
< |
p[0] += zline[x]*dir[0]; |
282 |
< |
p[1] += zline[x]*dir[1]; |
283 |
< |
p[2] += zline[x]*dir[2]; |
284 |
< |
pixelview(&xnew, &ynew, &znew, &ourview, p); |
285 |
< |
if (znew <= 0.0 || xnew < 0 || xnew > ourview.hresolu |
286 |
< |
|| ynew < 0 || ynew > ourview.vresolu) |
280 |
> |
pos[0] = x - .5*(theirview.hresolu-1); |
281 |
> |
pos[1] = y - .5*(theirview.vresolu-1); |
282 |
> |
pos[2] = zline[x]; |
283 |
> |
if (theirview.type == VT_PER) { |
284 |
> |
pos[2] /= sqrt( 1. |
285 |
> |
+ pos[0]*pos[0]*theirview.vhn2 |
286 |
> |
+ pos[1]*pos[1]*theirview.vvn2 ); |
287 |
> |
pos[0] *= pos[2]; |
288 |
> |
pos[1] *= pos[2]; |
289 |
> |
} |
290 |
> |
multp3(pos, pos, theirs2ours); |
291 |
> |
if (pos[2] <= 0.0) |
292 |
|
continue; |
293 |
< |
/* check current value at position */ |
294 |
< |
xpos = xnew; |
295 |
< |
ypos = ynew; |
293 |
> |
if (ourview.type == VT_PER) { |
294 |
> |
pos[0] /= pos[2]; |
295 |
> |
pos[1] /= pos[2]; |
296 |
> |
} |
297 |
> |
pos[0] += .5*ourview.hresolu; |
298 |
> |
pos[1] += .5*ourview.vresolu; |
299 |
> |
if (pos[0] < 0 || pos[0] > ourview.hresolu |
300 |
> |
|| pos[1] < 0 || pos[1] > ourview.vresolu) |
301 |
> |
continue; |
302 |
> |
/* check current value at pos */ |
303 |
> |
xpos = pos[0]; |
304 |
> |
ypos = pos[1]; |
305 |
|
if (zscan(ypos)[xpos] <= 0.0 |
306 |
< |
|| zscan(ypos)[xpos] - znew |
306 |
> |
|| zscan(ypos)[xpos] - pos[2] |
307 |
|
> zeps*zscan(ypos)[xpos]) { |
308 |
< |
zscan(ypos)[xpos] = znew; |
308 |
> |
zscan(ypos)[xpos] = pos[2]; |
309 |
|
copycolr(pscan(ypos)[xpos], pline[x]); |
310 |
|
} |
311 |
|
} |