| 21 |
|
|
| 22 |
|
#include "random.h" |
| 23 |
|
|
| 24 |
< |
VIEW ourview = STDVIEW(512); /* view parameters */ |
| 24 |
> |
VIEW ourview = STDVIEW; /* view parameters */ |
| 25 |
> |
int hresolu = 512; /* horizontal resolution */ |
| 26 |
> |
int vresolu = 512; /* vertical resolution */ |
| 27 |
> |
double pixaspect = 1.0; /* pixel aspect ratio */ |
| 28 |
|
|
| 29 |
|
int psample = 4; /* pixel sample size */ |
| 30 |
|
double maxdiff = .05; /* max. difference for interpolation */ |
| 31 |
|
double dstrpix = 0.67; /* square pixel distribution */ |
| 32 |
|
|
| 33 |
|
double dstrsrc = 0.0; /* square source distribution */ |
| 34 |
< |
double shadthresh = .01; /* shadow threshold */ |
| 34 |
> |
double shadthresh = .05; /* shadow threshold */ |
| 35 |
> |
double shadcert = .5; /* shadow certainty */ |
| 36 |
|
|
| 37 |
|
int maxdepth = 6; /* maximum recursion depth */ |
| 38 |
|
double minweight = 5e-3; /* minimum ray weight */ |
| 39 |
|
|
| 40 |
|
COLOR ambval = BLKCOLOR; /* ambient value */ |
| 41 |
|
double ambacc = 0.2; /* ambient accuracy */ |
| 42 |
< |
int ambres = 128; /* ambient resolution */ |
| 42 |
> |
int ambres = 32; /* ambient resolution */ |
| 43 |
|
int ambdiv = 128; /* ambient divisions */ |
| 44 |
|
int ambssamp = 0; /* ambient super-samples */ |
| 45 |
|
int ambounce = 0; /* ambient bounces */ |
| 56 |
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|
| 57 |
|
#define pixjitter() (.5+dstrpix*(.5-frandom())) |
| 58 |
|
|
| 59 |
+ |
double pixvalue(); |
| 60 |
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|
| 61 |
+ |
|
| 62 |
|
quit(code) /* quit program */ |
| 63 |
|
int code; |
| 64 |
|
{ |
| 94 |
|
} |
| 95 |
|
|
| 96 |
|
|
| 97 |
< |
render(oldfile) /* render the scene */ |
| 98 |
< |
char *oldfile; |
| 97 |
> |
render(zfile, oldfile) /* render the scene */ |
| 98 |
> |
char *zfile, *oldfile; |
| 99 |
|
{ |
| 100 |
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
| 101 |
+ |
float *zbar[MAXDIV+1]; /* z values */ |
| 102 |
|
int ypos; /* current scanline */ |
| 103 |
+ |
FILE *zfp; |
| 104 |
|
COLOR *colptr; |
| 105 |
+ |
float *zptr; |
| 106 |
|
register int i; |
| 107 |
< |
|
| 107 |
> |
/* check sampling */ |
| 108 |
|
if (psample < 1) |
| 109 |
|
psample = 1; |
| 110 |
|
else if (psample > MAXDIV) |
| 111 |
|
psample = MAXDIV; |
| 112 |
< |
|
| 104 |
< |
ourview.hresolu -= ourview.hresolu % psample; |
| 105 |
< |
ourview.vresolu -= ourview.vresolu % psample; |
| 106 |
< |
|
| 112 |
> |
/* allocate scanlines */ |
| 113 |
|
for (i = 0; i <= psample; i++) { |
| 114 |
< |
scanbar[i] = (COLOR *)malloc((ourview.hresolu+1)*sizeof(COLOR)); |
| 114 |
> |
scanbar[i] = (COLOR *)malloc(hresolu*sizeof(COLOR)); |
| 115 |
|
if (scanbar[i] == NULL) |
| 116 |
< |
error(SYSTEM, "out of memory in render"); |
| 116 |
> |
goto memerr; |
| 117 |
|
} |
| 118 |
< |
|
| 118 |
> |
/* open z file */ |
| 119 |
> |
if (zfile != NULL) { |
| 120 |
> |
if ((zfp = fopen(zfile, "a+")) == NULL) { |
| 121 |
> |
sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
| 122 |
> |
error(SYSTEM, errmsg); |
| 123 |
> |
} |
| 124 |
> |
for (i = 0; i <= psample; i++) { |
| 125 |
> |
zbar[i] = (float *)malloc(hresolu*sizeof(float)); |
| 126 |
> |
if (zbar[i] == NULL) |
| 127 |
> |
goto memerr; |
| 128 |
> |
} |
| 129 |
> |
} else { |
| 130 |
> |
zfp = NULL; |
| 131 |
> |
for (i = 0; i <= psample; i++) |
| 132 |
> |
zbar[i] = NULL; |
| 133 |
> |
} |
| 134 |
|
/* write out boundaries */ |
| 135 |
< |
printf("-Y %d +X %d\n", ourview.vresolu, ourview.hresolu); |
| 136 |
< |
|
| 137 |
< |
ypos = ourview.vresolu - salvage(oldfile); /* find top line */ |
| 138 |
< |
fillscanline(scanbar[0], ypos, psample); /* top scan */ |
| 139 |
< |
|
| 140 |
< |
for (ypos -= psample; ypos > -psample; ypos -= psample) { |
| 135 |
> |
fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
| 136 |
> |
/* recover file and compute first */ |
| 137 |
> |
i = salvage(oldfile); |
| 138 |
> |
if (zfp != NULL && fseek(zfp, (long)i*hresolu*sizeof(float), 0) == EOF) |
| 139 |
> |
error(SYSTEM, "z file seek error in render"); |
| 140 |
> |
ypos = vresolu-1 - i; |
| 141 |
> |
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
| 142 |
> |
/* compute scanlines */ |
| 143 |
> |
for (ypos -= psample; ypos >= 0; ypos -= psample) { |
| 144 |
|
|
| 145 |
< |
colptr = scanbar[psample]; /* get last scanline */ |
| 145 |
> |
pctdone = 100.0*(vresolu-ypos-psample)/vresolu; |
| 146 |
> |
|
| 147 |
> |
colptr = scanbar[psample]; /* move base to top */ |
| 148 |
|
scanbar[psample] = scanbar[0]; |
| 149 |
|
scanbar[0] = colptr; |
| 150 |
< |
|
| 151 |
< |
fillscanline(scanbar[0], ypos, psample); /* base scan */ |
| 152 |
< |
|
| 153 |
< |
fillscanbar(scanbar, ypos, psample); |
| 154 |
< |
|
| 155 |
< |
for (i = psample-1; i >= 0; i--) |
| 156 |
< |
if (fwritescan(scanbar[i], ourview.hresolu, stdout) < 0) |
| 150 |
> |
zptr = zbar[psample]; |
| 151 |
> |
zbar[psample] = zbar[0]; |
| 152 |
> |
zbar[0] = zptr; |
| 153 |
> |
/* fill base line */ |
| 154 |
> |
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
| 155 |
> |
/* fill bar */ |
| 156 |
> |
fillscanbar(scanbar, zbar, hresolu, ypos, psample); |
| 157 |
> |
/* write it out */ |
| 158 |
> |
for (i = psample; i > 0; i--) { |
| 159 |
> |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 160 |
|
goto writerr; |
| 161 |
+ |
if (fwritescan(scanbar[i],hresolu,stdout) < 0) |
| 162 |
+ |
goto writerr; |
| 163 |
+ |
} |
| 164 |
+ |
if (zfp != NULL && fflush(zfp) == EOF) |
| 165 |
+ |
goto writerr; |
| 166 |
|
if (fflush(stdout) == EOF) |
| 167 |
|
goto writerr; |
| 134 |
– |
pctdone = 100.0*(ourview.vresolu-ypos)/ourview.vresolu; |
| 168 |
|
} |
| 169 |
< |
|
| 169 |
> |
/* compute residual */ |
| 170 |
> |
colptr = scanbar[psample]; |
| 171 |
> |
scanbar[psample] = scanbar[0]; |
| 172 |
> |
scanbar[0] = colptr; |
| 173 |
> |
zptr = zbar[psample]; |
| 174 |
> |
zbar[psample] = zbar[0]; |
| 175 |
> |
zbar[0] = zptr; |
| 176 |
> |
if (ypos > -psample) { |
| 177 |
> |
fillscanline(scanbar[-ypos], zbar[-ypos], hresolu, 0, psample); |
| 178 |
> |
fillscanbar(scanbar-ypos, zbar-ypos, hresolu, 0, psample+ypos); |
| 179 |
> |
} |
| 180 |
> |
for (i = psample; i+ypos >= 0; i--) { |
| 181 |
> |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 182 |
> |
goto writerr; |
| 183 |
> |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
| 184 |
> |
goto writerr; |
| 185 |
> |
} |
| 186 |
> |
/* clean up */ |
| 187 |
> |
if (zfp != NULL) { |
| 188 |
> |
if (fclose(zfp) == EOF) |
| 189 |
> |
goto writerr; |
| 190 |
> |
for (i = 0; i <= psample; i++) |
| 191 |
> |
free((char *)zbar[i]); |
| 192 |
> |
} |
| 193 |
> |
if (fflush(stdout) == EOF) |
| 194 |
> |
goto writerr; |
| 195 |
|
for (i = 0; i <= psample; i++) |
| 196 |
|
free((char *)scanbar[i]); |
| 197 |
+ |
pctdone = 100.0; |
| 198 |
|
return; |
| 199 |
|
writerr: |
| 200 |
|
error(SYSTEM, "write error in render"); |
| 201 |
+ |
memerr: |
| 202 |
+ |
error(SYSTEM, "out of memory in render"); |
| 203 |
|
} |
| 204 |
|
|
| 205 |
|
|
| 206 |
< |
fillscanline(scanline, y, xstep) /* fill scan line at y */ |
| 206 |
> |
fillscanline(scanline, zline, xres, y, xstep) /* fill scan line at y */ |
| 207 |
|
register COLOR *scanline; |
| 208 |
< |
int y, xstep; |
| 208 |
> |
register float *zline; |
| 209 |
> |
int xres, y, xstep; |
| 210 |
|
{ |
| 211 |
|
int b = xstep; |
| 212 |
+ |
double z; |
| 213 |
|
register int i; |
| 214 |
|
|
| 215 |
< |
pixvalue(scanline[0], 0, y); |
| 215 |
> |
z = pixvalue(scanline[0], 0, y); |
| 216 |
> |
if (zline) zline[0] = z; |
| 217 |
|
|
| 218 |
< |
for (i = xstep; i <= ourview.hresolu; i += xstep) { |
| 218 |
> |
for (i = xstep; i < xres; i += xstep) { |
| 219 |
|
|
| 220 |
< |
pixvalue(scanline[i], i, y); |
| 220 |
> |
z = pixvalue(scanline[i], i, y); |
| 221 |
> |
if (zline) zline[i] = z; |
| 222 |
|
|
| 223 |
< |
b = fillsample(scanline+i-xstep, i-xstep, y, xstep, 0, b/2); |
| 223 |
> |
b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 224 |
> |
i-xstep, y, xstep, 0, b/2); |
| 225 |
|
} |
| 226 |
+ |
if (i-xstep < xres-1) { |
| 227 |
+ |
z = pixvalue(scanline[xres-1], xres-1, y); |
| 228 |
+ |
if (zline) zline[xres-1] = z; |
| 229 |
+ |
fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 230 |
+ |
i-xstep, y, xres-1-(i-xstep), 0, b/2); |
| 231 |
+ |
} |
| 232 |
|
} |
| 233 |
|
|
| 234 |
|
|
| 235 |
< |
fillscanbar(scanbar, y, ysize) /* fill interior */ |
| 235 |
> |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
| 236 |
|
register COLOR *scanbar[]; |
| 237 |
< |
int y, ysize; |
| 237 |
> |
register float *zbar[]; |
| 238 |
> |
int xres, y, ysize; |
| 239 |
|
{ |
| 240 |
|
COLOR vline[MAXDIV+1]; |
| 241 |
+ |
float zline[MAXDIV+1]; |
| 242 |
|
int b = ysize; |
| 243 |
+ |
double z; |
| 244 |
|
register int i, j; |
| 245 |
|
|
| 246 |
< |
for (i = 0; i < ourview.hresolu; i++) { |
| 246 |
> |
for (i = 0; i < xres; i++) { |
| 247 |
|
|
| 248 |
|
copycolor(vline[0], scanbar[0][i]); |
| 249 |
|
copycolor(vline[ysize], scanbar[ysize][i]); |
| 250 |
+ |
if (zbar[0]) { |
| 251 |
+ |
zline[0] = zbar[0][i]; |
| 252 |
+ |
zline[ysize] = zbar[ysize][i]; |
| 253 |
+ |
} |
| 254 |
|
|
| 255 |
< |
b = fillsample(vline, i, y, 0, ysize, b/2); |
| 255 |
> |
b = fillsample(vline, zbar[0] ? zline : NULL, |
| 256 |
> |
i, y, 0, ysize, b/2); |
| 257 |
|
|
| 258 |
|
for (j = 1; j < ysize; j++) |
| 259 |
|
copycolor(scanbar[j][i], vline[j]); |
| 260 |
+ |
if (zbar[0]) |
| 261 |
+ |
for (j = 1; j < ysize; j++) |
| 262 |
+ |
zbar[j][i] = zline[j]; |
| 263 |
|
} |
| 264 |
|
} |
| 265 |
|
|
| 266 |
|
|
| 267 |
|
int |
| 268 |
< |
fillsample(colline, x, y, xlen, ylen, b) /* fill interior points */ |
| 268 |
> |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
| 269 |
|
register COLOR *colline; |
| 270 |
+ |
register float *zline; |
| 271 |
|
int x, y; |
| 272 |
|
int xlen, ylen; |
| 273 |
|
int b; |
| 274 |
|
{ |
| 275 |
+ |
extern double fabs(); |
| 276 |
|
double ratio; |
| 277 |
+ |
double z; |
| 278 |
|
COLOR ctmp; |
| 279 |
|
int ncut; |
| 280 |
|
register int len; |
| 287 |
|
if (len <= 1) /* limit recursion */ |
| 288 |
|
return(0); |
| 289 |
|
|
| 290 |
< |
if (b > 0 || bigdiff(colline[0], colline[len], maxdiff)) { |
| 290 |
> |
if (b > 0 |
| 291 |
> |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
| 292 |
> |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
| 293 |
|
|
| 294 |
< |
pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
| 294 |
> |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
| 295 |
> |
if (zline) zline[len>>1] = z; |
| 296 |
|
ncut = 1; |
| 297 |
|
|
| 298 |
|
} else { /* interpolate */ |
| 300 |
|
copycolor(colline[len>>1], colline[len]); |
| 301 |
|
ratio = (double)(len>>1) / len; |
| 302 |
|
scalecolor(colline[len>>1], ratio); |
| 303 |
< |
copycolor(ctmp, colline[0]); |
| 303 |
> |
if (zline) zline[len>>1] = zline[len] * ratio; |
| 304 |
|
ratio = 1.0 - ratio; |
| 305 |
+ |
copycolor(ctmp, colline[0]); |
| 306 |
|
scalecolor(ctmp, ratio); |
| 307 |
|
addcolor(colline[len>>1], ctmp); |
| 308 |
+ |
if (zline) zline[len>>1] += zline[0] * ratio; |
| 309 |
|
ncut = 0; |
| 310 |
|
} |
| 311 |
|
/* recurse */ |
| 312 |
< |
ncut += fillsample(colline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
| 312 |
> |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
| 313 |
|
|
| 314 |
< |
ncut += fillsample(colline + (len>>1), x + (xlen>>1), y + (ylen>>1), |
| 315 |
< |
xlen - (xlen>>1), ylen - (ylen>>1), b/2); |
| 314 |
> |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
| 315 |
> |
x+(xlen>>1), y+(ylen>>1), |
| 316 |
> |
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
| 317 |
|
|
| 318 |
|
return(ncut); |
| 319 |
|
} |
| 320 |
|
|
| 321 |
|
|
| 322 |
+ |
double |
| 323 |
|
pixvalue(col, x, y) /* compute pixel value */ |
| 324 |
|
COLOR col; /* returned color */ |
| 325 |
|
int x, y; /* pixel position */ |
| 326 |
|
{ |
| 327 |
|
static RAY thisray; /* our ray for this pixel */ |
| 328 |
|
|
| 329 |
< |
rayview(thisray.rorg, thisray.rdir, &ourview, |
| 330 |
< |
x + pixjitter(), y + pixjitter()); |
| 329 |
> |
viewray(thisray.rorg, thisray.rdir, &ourview, |
| 330 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu); |
| 331 |
|
|
| 332 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 333 |
|
|
| 334 |
|
rayvalue(&thisray); /* trace ray */ |
| 335 |
|
|
| 336 |
|
copycolor(col, thisray.rcol); /* return color */ |
| 337 |
+ |
|
| 338 |
+ |
return(thisray.rot); /* return distance */ |
| 339 |
|
} |
| 340 |
|
|
| 341 |
|
|
| 349 |
|
|
| 350 |
|
if (oldfile == NULL) |
| 351 |
|
return(0); |
| 352 |
< |
else if ((fp = fopen(oldfile, "r")) == NULL) { |
| 352 |
> |
|
| 353 |
> |
if ((fp = fopen(oldfile, "r")) == NULL) { |
| 354 |
|
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
| 355 |
|
error(WARNING, errmsg); |
| 356 |
|
return(0); |
| 358 |
|
/* discard header */ |
| 359 |
|
getheader(fp, NULL); |
| 360 |
|
/* get picture size */ |
| 361 |
< |
if (fscanf(fp, "-Y %d +X %d\n", &y, &x) != 2) { |
| 361 |
> |
if (fgetresolu(&x, &y, fp) != (YMAJOR|YDECR)) { |
| 362 |
|
sprintf(errmsg, "bad recover file \"%s\"", oldfile); |
| 363 |
|
error(WARNING, errmsg); |
| 364 |
|
fclose(fp); |
| 365 |
|
return(0); |
| 366 |
|
} |
| 367 |
|
|
| 368 |
< |
if (x != ourview.hresolu || y != ourview.vresolu) { |
| 368 |
> |
if (x != hresolu || y != vresolu) { |
| 369 |
|
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
| 370 |
|
oldfile); |
| 371 |
|
error(USER, errmsg); |
| 276 |
– |
return(0); |
| 372 |
|
} |
| 373 |
|
|
| 374 |
< |
scanline = (COLR *)malloc(ourview.hresolu*sizeof(COLR)); |
| 374 |
> |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
| 375 |
|
if (scanline == NULL) |
| 376 |
|
error(SYSTEM, "out of memory in salvage"); |
| 377 |
< |
for (y = 0; y < ourview.vresolu; y++) { |
| 378 |
< |
if (freadcolrs(scanline, ourview.hresolu, fp) < 0) |
| 377 |
> |
for (y = 0; y < vresolu; y++) { |
| 378 |
> |
if (freadcolrs(scanline, hresolu, fp) < 0) |
| 379 |
|
break; |
| 380 |
< |
if (fwritecolrs(scanline, ourview.hresolu, stdout) < 0) |
| 380 |
> |
if (fwritecolrs(scanline, hresolu, stdout) < 0) |
| 381 |
|
goto writerr; |
| 382 |
|
} |
| 383 |
|
if (fflush(stdout) == EOF) |
