| 15 |
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#ifdef BSD |
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#include <sys/time.h> |
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#include <sys/resource.h> |
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+ |
#else |
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+ |
#include <signal.h> |
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#endif |
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+ |
#include <fcntl.h> |
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|
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#include "view.h" |
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|
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VIEW ourview = STDVIEW; /* view parameters */ |
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int hresolu = 512; /* horizontal resolution */ |
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int vresolu = 512; /* vertical resolution */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
| 31 |
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|
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int psample = 4; /* pixel sample size */ |
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double maxdiff = .05; /* max. difference for interpolation */ |
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sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f CPU hours\n", |
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nrays, pctdone, t/3600.0); |
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#else |
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signal(SIGALRM, report); |
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sprintf(errmsg, "%ld rays, %4.2f%% done\n", nrays, pctdone); |
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#endif |
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eputs(errmsg); |
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render(zfile, oldfile) /* render the scene */ |
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char *zfile, *oldfile; |
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{ |
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extern long lseek(); |
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COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
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float *zbar[MAXDIV+1]; /* z values */ |
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int ypos; /* current scanline */ |
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< |
FILE *zfp; |
| 108 |
> |
int ystep; /* current y step size */ |
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> |
int zfd; |
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COLOR *colptr; |
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float *zptr; |
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register int i; |
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} |
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/* open z file */ |
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if (zfile != NULL) { |
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< |
if ((zfp = fopen(zfile, "a+")) == NULL) { |
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> |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
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sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
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error(SYSTEM, errmsg); |
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} |
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goto memerr; |
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} |
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} else { |
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< |
zfp = NULL; |
| 136 |
> |
zfd = -1; |
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for (i = 0; i <= psample; i++) |
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zbar[i] = NULL; |
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} |
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fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
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/* recover file and compute first */ |
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i = salvage(oldfile); |
| 144 |
< |
if (zfp != NULL && fseek(zfp, (long)i*hresolu*sizeof(float), 0) == EOF) |
| 144 |
> |
if (zfd != -1 && i > 0 && |
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lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
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error(SYSTEM, "z file seek error in render"); |
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ypos = vresolu-1 - i; |
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fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
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ystep = psample; |
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/* compute scanlines */ |
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< |
for (ypos -= psample; ypos >= 0; ypos -= psample) { |
| 152 |
< |
|
| 153 |
< |
pctdone = 100.0*(vresolu-ypos-psample)/vresolu; |
| 154 |
< |
|
| 155 |
< |
colptr = scanbar[psample]; /* move base to top */ |
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< |
scanbar[psample] = scanbar[0]; |
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> |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
| 152 |
> |
/* record progress */ |
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> |
pctdone = 100.0*(vresolu-1-ypos-ystep)/vresolu; |
| 154 |
> |
/* bottom adjust? */ |
| 155 |
> |
if (ypos < 0) { |
| 156 |
> |
ystep += ypos; |
| 157 |
> |
ypos = 0; |
| 158 |
> |
} |
| 159 |
> |
colptr = scanbar[ystep]; /* move base to top */ |
| 160 |
> |
scanbar[ystep] = scanbar[0]; |
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scanbar[0] = colptr; |
| 162 |
< |
zptr = zbar[psample]; |
| 163 |
< |
zbar[psample] = zbar[0]; |
| 162 |
> |
zptr = zbar[ystep]; |
| 163 |
> |
zbar[ystep] = zbar[0]; |
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zbar[0] = zptr; |
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/* fill base line */ |
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fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
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/* fill bar */ |
| 168 |
< |
fillscanbar(scanbar, zbar, hresolu, ypos, psample); |
| 168 |
> |
fillscanbar(scanbar, zbar, hresolu, ypos, ystep); |
| 169 |
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/* write it out */ |
| 170 |
< |
for (i = psample; i > 0; i--) { |
| 171 |
< |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 170 |
> |
for (i = ystep; i > 0; i--) { |
| 171 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
| 172 |
> |
hresolu*sizeof(float)) |
| 173 |
> |
< hresolu*sizeof(float)) |
| 174 |
|
goto writerr; |
| 175 |
< |
if (fwritescan(scanbar[i],hresolu,stdout) < 0) |
| 175 |
> |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
| 176 |
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goto writerr; |
| 177 |
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} |
| 163 |
– |
if (zfp != NULL && fflush(zfp) == EOF) |
| 164 |
– |
goto writerr; |
| 178 |
|
if (fflush(stdout) == EOF) |
| 179 |
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goto writerr; |
| 180 |
|
} |
| 168 |
– |
/* compute residual */ |
| 169 |
– |
colptr = scanbar[psample]; |
| 170 |
– |
scanbar[psample] = scanbar[0]; |
| 171 |
– |
scanbar[0] = colptr; |
| 172 |
– |
zptr = zbar[psample]; |
| 173 |
– |
zbar[psample] = zbar[0]; |
| 174 |
– |
zbar[0] = zptr; |
| 175 |
– |
if (ypos > -psample) { |
| 176 |
– |
fillscanline(scanbar[-ypos], zbar[-ypos], hresolu, 0, psample); |
| 177 |
– |
fillscanbar(scanbar-ypos, zbar-ypos, hresolu, 0, psample+ypos); |
| 178 |
– |
} |
| 179 |
– |
for (i = psample; i+ypos >= 0; i--) { |
| 180 |
– |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 181 |
– |
goto writerr; |
| 182 |
– |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
| 183 |
– |
goto writerr; |
| 184 |
– |
} |
| 181 |
|
/* clean up */ |
| 182 |
< |
if (zfp != NULL) { |
| 183 |
< |
if (fclose(zfp) == EOF) |
| 182 |
> |
if (zfd != -1) { |
| 183 |
> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
| 184 |
> |
< hresolu*sizeof(float)) |
| 185 |
|
goto writerr; |
| 186 |
+ |
if (close(zfd) == -1) |
| 187 |
+ |
goto writerr; |
| 188 |
|
for (i = 0; i <= psample; i++) |
| 189 |
|
free((char *)zbar[i]); |
| 190 |
|
} |
| 191 |
+ |
fwritescan(scanbar[0], hresolu, stdout); |
| 192 |
|
if (fflush(stdout) == EOF) |
| 193 |
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goto writerr; |
| 194 |
|
for (i = 0; i <= psample; i++) |
| 214 |
|
z = pixvalue(scanline[0], 0, y); |
| 215 |
|
if (zline) zline[0] = z; |
| 216 |
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|
| 217 |
< |
for (i = xstep; i < xres; i += xstep) { |
| 218 |
< |
|
| 217 |
> |
for (i = xstep; i < xres-1+xstep; i += xstep) { |
| 218 |
> |
if (i >= xres) { |
| 219 |
> |
xstep += xres-1-i; |
| 220 |
> |
i = xres-1; |
| 221 |
> |
} |
| 222 |
|
z = pixvalue(scanline[i], i, y); |
| 223 |
|
if (zline) zline[i] = z; |
| 224 |
|
|
| 225 |
|
b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 226 |
|
i-xstep, y, xstep, 0, b/2); |
| 227 |
|
} |
| 225 |
– |
if (i-xstep < xres-1) { |
| 226 |
– |
z = pixvalue(scanline[xres-1], xres-1, y); |
| 227 |
– |
if (zline) zline[xres-1] = z; |
| 228 |
– |
fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 229 |
– |
i-xstep, y, xres-1-(i-xstep), 0, b/2); |
| 230 |
– |
} |
| 228 |
|
} |
| 229 |
|
|
| 230 |
|
|
| 236 |
|
COLOR vline[MAXDIV+1]; |
| 237 |
|
float zline[MAXDIV+1]; |
| 238 |
|
int b = ysize; |
| 242 |
– |
double z; |
| 239 |
|
register int i, j; |
| 240 |
|
|
| 241 |
|
for (i = 0; i < xres; i++) { |
| 321 |
|
{ |
| 322 |
|
static RAY thisray; /* our ray for this pixel */ |
| 323 |
|
|
| 324 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, |
| 325 |
< |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu); |
| 324 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
| 325 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu) < 0) { |
| 326 |
> |
setcolor(col, 0.0, 0.0, 0.0); |
| 327 |
> |
return(0.0); |
| 328 |
> |
} |
| 329 |
|
|
| 330 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 331 |
|
|
| 333 |
|
|
| 334 |
|
copycolor(col, thisray.rcol); /* return color */ |
| 335 |
|
|
| 336 |
< |
return(thisray.rot); /* return distance */ |
| 336 |
> |
return(thisray.rt); /* return distance */ |
| 337 |
|
} |
| 338 |
|
|
| 339 |
|
|
