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/* Copyright (c) 1986 Regents of the University of California */ |
1 |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
15 |
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#ifdef BSD |
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#include <sys/time.h> |
17 |
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#include <sys/resource.h> |
18 |
+ |
#else |
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#include <signal.h> |
20 |
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#endif |
21 |
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#include <fcntl.h> |
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|
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#include "view.h" |
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|
25 |
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#include "random.h" |
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|
27 |
< |
VIEW ourview = STDVIEW(512); /* view parameters */ |
27 |
> |
int dimlist[MAXDIM]; /* sampling dimensions */ |
28 |
> |
int ndims = 0; /* number of sampling dimensions */ |
29 |
> |
int samplendx; /* sample index number */ |
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|
31 |
+ |
VIEW ourview = STDVIEW; /* view parameters */ |
32 |
+ |
int hresolu = 512; /* horizontal resolution */ |
33 |
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int vresolu = 512; /* vertical resolution */ |
34 |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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|
36 |
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int psample = 4; /* pixel sample size */ |
37 |
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double maxdiff = .05; /* max. difference for interpolation */ |
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double dstrpix = 0.67; /* square pixel distribution */ |
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .05; /* shadow threshold */ |
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double shadcert = .5; /* shadow certainty */ |
43 |
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int directrelay = 0; /* number of source relays */ |
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int vspretest = 128; /* virtual source pretest density */ |
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|
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int maxdepth = 6; /* maximum recursion depth */ |
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double minweight = 5e-3; /* minimum ray weight */ |
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|
60 |
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double pctdone = 0.0; /* percentage done */ |
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|
62 |
+ |
long tlastrept = 0L; /* time at last report */ |
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|
64 |
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extern long time(); |
65 |
+ |
extern long tstart; /* starting time */ |
66 |
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|
67 |
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extern long nrays; /* number of rays traced */ |
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|
69 |
< |
#define MAXDIV 32 /* maximum sample size */ |
69 |
> |
#define MAXDIV 15 /* maximum sample size */ |
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|
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
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|
73 |
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double pixvalue(); |
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|
75 |
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|
76 |
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quit(code) /* quit program */ |
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int code; |
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{ |
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} |
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|
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|
86 |
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#ifdef BSD |
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report() /* report progress */ |
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{ |
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#ifdef BSD |
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struct rusage rubuf; |
90 |
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double t; |
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|
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|
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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); |
101 |
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eputs(errmsg); |
102 |
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tlastrept = time((long *)0); |
103 |
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} |
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#else |
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sprintf(errmsg, "%ld rays, %4.2f%% done\n", nrays, pctdone); |
106 |
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#endif |
105 |
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report() /* report progress */ |
106 |
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{ |
107 |
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signal(SIGALRM, report); |
108 |
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tlastrept = time((long *)0); |
109 |
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sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f hours\n", |
110 |
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nrays, pctdone, (tlastrept-tstart)/3600.0); |
111 |
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eputs(errmsg); |
86 |
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|
87 |
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if (ralrm > 0) |
88 |
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alarm(ralrm); |
112 |
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} |
113 |
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#endif |
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|
115 |
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|
116 |
< |
render(oldfile) /* render the scene */ |
117 |
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char *oldfile; |
116 |
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render(zfile, oldfile) /* render the scene */ |
117 |
> |
char *zfile, *oldfile; |
118 |
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{ |
119 |
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extern long lseek(); |
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COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
121 |
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float *zbar[MAXDIV+1]; /* z values */ |
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int ypos; /* current scanline */ |
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int xres, yres; /* rendered x and y resolution */ |
123 |
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int ystep; /* current y step size */ |
124 |
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int zfd; |
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COLOR *colptr; |
126 |
+ |
float *zptr; |
127 |
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register int i; |
128 |
< |
/* set rendered resolution */ |
129 |
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xres = ourview.hresolu; |
102 |
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yres = ourview.vresolu; |
103 |
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/* adjust for sampling */ |
104 |
< |
if (psample <= 1) |
128 |
> |
/* check sampling */ |
129 |
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if (psample < 1) |
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psample = 1; |
131 |
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else { |
132 |
< |
if (psample > MAXDIV) |
133 |
< |
psample = MAXDIV; |
134 |
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/* rendered resolution may be larger */ |
135 |
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xres += psample-1 - ((ourview.hresolu-2)%psample); |
111 |
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yres += psample-1 - ((ourview.vresolu-2)%psample); |
131 |
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else if (psample > MAXDIV) { |
132 |
> |
sprintf(errmsg, "pixel sampling reduced from %d to %d", |
133 |
> |
psample, MAXDIV); |
134 |
> |
error(WARNING, errmsg); |
135 |
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psample = MAXDIV; |
136 |
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} |
137 |
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/* allocate scanlines */ |
138 |
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for (i = 0; i <= psample; i++) { |
139 |
< |
scanbar[i] = (COLOR *)malloc(xres*sizeof(COLOR)); |
139 |
> |
scanbar[i] = (COLOR *)malloc(hresolu*sizeof(COLOR)); |
140 |
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if (scanbar[i] == NULL) |
141 |
< |
error(SYSTEM, "out of memory in render"); |
141 |
> |
goto memerr; |
142 |
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} |
143 |
+ |
/* open z file */ |
144 |
+ |
if (zfile != NULL) { |
145 |
+ |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
146 |
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sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
147 |
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error(SYSTEM, errmsg); |
148 |
+ |
} |
149 |
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for (i = 0; i <= psample; i++) { |
150 |
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zbar[i] = (float *)malloc(hresolu*sizeof(float)); |
151 |
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if (zbar[i] == NULL) |
152 |
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goto memerr; |
153 |
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} |
154 |
+ |
} else { |
155 |
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zfd = -1; |
156 |
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for (i = 0; i <= psample; i++) |
157 |
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zbar[i] = NULL; |
158 |
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} |
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/* write out boundaries */ |
160 |
< |
fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout); |
161 |
< |
|
162 |
< |
ypos = ourview.vresolu-1 - salvage(oldfile); /* find top line */ |
163 |
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fillscanline(scanbar[0], xres, ypos, psample); /* top scan */ |
164 |
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|
165 |
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for (ypos -= psample; ypos > -psample; ypos -= psample) { |
166 |
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|
167 |
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pctdone = 100.0*(ourview.vresolu-ypos+psample)/ourview.vresolu; |
168 |
< |
|
169 |
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colptr = scanbar[psample]; /* move base to top */ |
170 |
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scanbar[psample] = scanbar[0]; |
160 |
> |
fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
161 |
> |
/* recover file and compute first */ |
162 |
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i = salvage(oldfile); |
163 |
> |
if (zfd != -1 && i > 0 && |
164 |
> |
lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
165 |
> |
error(SYSTEM, "z file seek error in render"); |
166 |
> |
pctdone = 100.0*i/vresolu; |
167 |
> |
if (ralrm > 0) /* report init stats */ |
168 |
> |
report(); |
169 |
> |
ypos = vresolu-1 - i; |
170 |
> |
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
171 |
> |
ystep = psample; |
172 |
> |
/* compute scanlines */ |
173 |
> |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
174 |
> |
/* bottom adjust? */ |
175 |
> |
if (ypos < 0) { |
176 |
> |
ystep += ypos; |
177 |
> |
ypos = 0; |
178 |
> |
} |
179 |
> |
colptr = scanbar[ystep]; /* move base to top */ |
180 |
> |
scanbar[ystep] = scanbar[0]; |
181 |
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scanbar[0] = colptr; |
182 |
< |
|
183 |
< |
fillscanline(scanbar[0], xres, ypos, psample); /* fill base */ |
184 |
< |
|
185 |
< |
fillscanbar(scanbar, xres, ypos, psample); /* fill bar */ |
186 |
< |
|
187 |
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for (i = psample; (ypos>0) ? i > 0 : ypos+i >= 0; i--) |
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< |
if (fwritescan(scanbar[i], ourview.hresolu, stdout) < 0) |
182 |
> |
zptr = zbar[ystep]; |
183 |
> |
zbar[ystep] = zbar[0]; |
184 |
> |
zbar[0] = zptr; |
185 |
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/* fill base line */ |
186 |
> |
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
187 |
> |
/* fill bar */ |
188 |
> |
fillscanbar(scanbar, zbar, hresolu, ypos, ystep); |
189 |
> |
/* write it out */ |
190 |
> |
for (i = ystep; i > 0; i--) { |
191 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
192 |
> |
hresolu*sizeof(float)) |
193 |
> |
< hresolu*sizeof(float)) |
194 |
|
goto writerr; |
195 |
+ |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
196 |
+ |
goto writerr; |
197 |
+ |
} |
198 |
|
if (fflush(stdout) == EOF) |
199 |
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goto writerr; |
200 |
+ |
/* record progress */ |
201 |
+ |
pctdone = 100.0*(vresolu-1-ypos)/vresolu; |
202 |
+ |
if (ralrm > 0 && time((long *)0) >= tlastrept+ralrm) |
203 |
+ |
report(); |
204 |
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} |
205 |
< |
pctdone = 100.0; |
206 |
< |
|
205 |
> |
/* clean up */ |
206 |
> |
if (zfd != -1) { |
207 |
> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
208 |
> |
< hresolu*sizeof(float)) |
209 |
> |
goto writerr; |
210 |
> |
if (close(zfd) == -1) |
211 |
> |
goto writerr; |
212 |
> |
for (i = 0; i <= psample; i++) |
213 |
> |
free((char *)zbar[i]); |
214 |
> |
} |
215 |
> |
fwritescan(scanbar[0], hresolu, stdout); |
216 |
> |
if (fflush(stdout) == EOF) |
217 |
> |
goto writerr; |
218 |
|
for (i = 0; i <= psample; i++) |
219 |
|
free((char *)scanbar[i]); |
220 |
+ |
pctdone = 100.0; |
221 |
|
return; |
222 |
|
writerr: |
223 |
|
error(SYSTEM, "write error in render"); |
224 |
+ |
memerr: |
225 |
+ |
error(SYSTEM, "out of memory in render"); |
226 |
|
} |
227 |
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|
228 |
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|
229 |
< |
fillscanline(scanline, xres, y, xstep) /* fill scan line at y */ |
229 |
> |
fillscanline(scanline, zline, xres, y, xstep) /* fill scan line at y */ |
230 |
|
register COLOR *scanline; |
231 |
+ |
register float *zline; |
232 |
|
int xres, y, xstep; |
233 |
|
{ |
234 |
|
int b = xstep; |
235 |
+ |
double z; |
236 |
|
register int i; |
237 |
|
|
238 |
< |
pixvalue(scanline[0], 0, y); |
238 |
> |
z = pixvalue(scanline[0], 0, y); |
239 |
> |
if (zline) zline[0] = z; |
240 |
|
|
241 |
< |
for (i = xstep; i < xres; i += xstep) { |
242 |
< |
|
243 |
< |
pixvalue(scanline[i], i, y); |
241 |
> |
for (i = xstep; i < xres-1+xstep; i += xstep) { |
242 |
> |
if (i >= xres) { |
243 |
> |
xstep += xres-1-i; |
244 |
> |
i = xres-1; |
245 |
> |
} |
246 |
> |
z = pixvalue(scanline[i], i, y); |
247 |
> |
if (zline) zline[i] = z; |
248 |
|
|
249 |
< |
b = fillsample(scanline+i-xstep, i-xstep, y, xstep, 0, b/2); |
249 |
> |
b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
250 |
> |
i-xstep, y, xstep, 0, b/2); |
251 |
|
} |
252 |
|
} |
253 |
|
|
254 |
|
|
255 |
< |
fillscanbar(scanbar, xres, y, ysize) /* fill interior */ |
255 |
> |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
256 |
|
register COLOR *scanbar[]; |
257 |
+ |
register float *zbar[]; |
258 |
|
int xres, y, ysize; |
259 |
|
{ |
260 |
|
COLOR vline[MAXDIV+1]; |
261 |
+ |
float zline[MAXDIV+1]; |
262 |
|
int b = ysize; |
263 |
|
register int i, j; |
264 |
|
|
266 |
|
|
267 |
|
copycolor(vline[0], scanbar[0][i]); |
268 |
|
copycolor(vline[ysize], scanbar[ysize][i]); |
269 |
+ |
if (zbar[0]) { |
270 |
+ |
zline[0] = zbar[0][i]; |
271 |
+ |
zline[ysize] = zbar[ysize][i]; |
272 |
+ |
} |
273 |
|
|
274 |
< |
b = fillsample(vline, i, y, 0, ysize, b/2); |
274 |
> |
b = fillsample(vline, zbar[0] ? zline : NULL, |
275 |
> |
i, y, 0, ysize, b/2); |
276 |
|
|
277 |
|
for (j = 1; j < ysize; j++) |
278 |
|
copycolor(scanbar[j][i], vline[j]); |
279 |
+ |
if (zbar[0]) |
280 |
+ |
for (j = 1; j < ysize; j++) |
281 |
+ |
zbar[j][i] = zline[j]; |
282 |
|
} |
283 |
|
} |
284 |
|
|
285 |
|
|
286 |
|
int |
287 |
< |
fillsample(colline, x, y, xlen, ylen, b) /* fill interior points */ |
287 |
> |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
288 |
|
register COLOR *colline; |
289 |
+ |
register float *zline; |
290 |
|
int x, y; |
291 |
|
int xlen, ylen; |
292 |
|
int b; |
293 |
|
{ |
294 |
+ |
extern double fabs(); |
295 |
|
double ratio; |
296 |
+ |
double z; |
297 |
|
COLOR ctmp; |
298 |
|
int ncut; |
299 |
|
register int len; |
306 |
|
if (len <= 1) /* limit recursion */ |
307 |
|
return(0); |
308 |
|
|
309 |
< |
if (b > 0 || bigdiff(colline[0], colline[len], maxdiff)) { |
309 |
> |
if (b > 0 |
310 |
> |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
311 |
> |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
312 |
|
|
313 |
< |
pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
313 |
> |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
314 |
> |
if (zline) zline[len>>1] = z; |
315 |
|
ncut = 1; |
316 |
|
|
317 |
|
} else { /* interpolate */ |
319 |
|
copycolor(colline[len>>1], colline[len]); |
320 |
|
ratio = (double)(len>>1) / len; |
321 |
|
scalecolor(colline[len>>1], ratio); |
322 |
< |
copycolor(ctmp, colline[0]); |
322 |
> |
if (zline) zline[len>>1] = zline[len] * ratio; |
323 |
|
ratio = 1.0 - ratio; |
324 |
+ |
copycolor(ctmp, colline[0]); |
325 |
|
scalecolor(ctmp, ratio); |
326 |
|
addcolor(colline[len>>1], ctmp); |
327 |
+ |
if (zline) zline[len>>1] += zline[0] * ratio; |
328 |
|
ncut = 0; |
329 |
|
} |
330 |
|
/* recurse */ |
331 |
< |
ncut += fillsample(colline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
331 |
> |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
332 |
|
|
333 |
< |
ncut += fillsample(colline + (len>>1), x + (xlen>>1), y + (ylen>>1), |
334 |
< |
xlen - (xlen>>1), ylen - (ylen>>1), b/2); |
333 |
> |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
334 |
> |
x+(xlen>>1), y+(ylen>>1), |
335 |
> |
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
336 |
|
|
337 |
|
return(ncut); |
338 |
|
} |
339 |
|
|
340 |
|
|
341 |
+ |
double |
342 |
|
pixvalue(col, x, y) /* compute pixel value */ |
343 |
|
COLOR col; /* returned color */ |
344 |
|
int x, y; /* pixel position */ |
345 |
|
{ |
346 |
< |
static RAY thisray; /* our ray for this pixel */ |
346 |
> |
static RAY thisray; |
347 |
|
|
348 |
< |
rayview(thisray.rorg, thisray.rdir, &ourview, |
349 |
< |
x + pixjitter(), y + pixjitter()); |
348 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
349 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu) < 0) { |
350 |
> |
setcolor(col, 0.0, 0.0, 0.0); |
351 |
> |
return(0.0); |
352 |
> |
} |
353 |
|
|
354 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
355 |
< |
|
355 |
> |
|
356 |
> |
samplendx = 3*y + x; /* set pixel index */ |
357 |
> |
|
358 |
|
rayvalue(&thisray); /* trace ray */ |
359 |
|
|
360 |
|
copycolor(col, thisray.rcol); /* return color */ |
361 |
+ |
|
362 |
+ |
return(thisray.rt); /* return distance */ |
363 |
|
} |
364 |
|
|
365 |
|
|
389 |
|
return(0); |
390 |
|
} |
391 |
|
|
392 |
< |
if (x != ourview.hresolu || y != ourview.vresolu) { |
392 |
> |
if (x != hresolu || y != vresolu) { |
393 |
|
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
394 |
|
oldfile); |
395 |
|
error(USER, errmsg); |
396 |
|
} |
397 |
|
|
398 |
< |
scanline = (COLR *)malloc(ourview.hresolu*sizeof(COLR)); |
398 |
> |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
399 |
|
if (scanline == NULL) |
400 |
|
error(SYSTEM, "out of memory in salvage"); |
401 |
< |
for (y = 0; y < ourview.vresolu; y++) { |
402 |
< |
if (freadcolrs(scanline, ourview.hresolu, fp) < 0) |
401 |
> |
for (y = 0; y < vresolu; y++) { |
402 |
> |
if (freadcolrs(scanline, hresolu, fp) < 0) |
403 |
|
break; |
404 |
< |
if (fwritecolrs(scanline, ourview.hresolu, stdout) < 0) |
404 |
> |
if (fwritecolrs(scanline, hresolu, stdout) < 0) |
405 |
|
goto writerr; |
406 |
|
} |
407 |
|
if (fflush(stdout) == EOF) |