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greg |
2.6 |
/* Copyright (c) 1992 Regents of the University of California */ |
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greg |
1.1 |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* rtrace.c - program and variables for individual ray tracing. |
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* |
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* 6/11/86 |
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*/ |
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/* |
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* Input is in the form: |
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* |
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* xorg yorg zorg xdir ydir zdir |
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* |
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* The direction need not be normalized. Output is flexible. |
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greg |
1.7 |
* If the direction vector is (0,0,0), then the output is flushed. |
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greg |
1.1 |
* All values default to ascii representation of real |
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* numbers. Binary representations can be selected |
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* with '-ff' for float or '-fd' for double. By default, |
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greg |
1.13 |
* radiance is computed. The '-i' or '-I' options indicate that |
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greg |
1.1 |
* irradiance values are desired. |
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*/ |
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#include "ray.h" |
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greg |
1.11 |
#include "octree.h" |
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greg |
1.1 |
#include "otypes.h" |
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greg |
2.6 |
#include "resolu.h" |
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greg |
1.14 |
int dimlist[MAXDIM]; /* sampling dimensions */ |
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int ndims = 0; /* number of sampling dimensions */ |
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int samplendx = 0; /* index for this sample */ |
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greg |
1.13 |
int imm_irrad = 0; /* compute immediate irradiance? */ |
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greg |
1.1 |
int inform = 'a'; /* input format */ |
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int outform = 'a'; /* output format */ |
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char *outvals = "v"; /* output specification */ |
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int hresolu = 0; /* horizontal (scan) size */ |
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int vresolu = 0; /* vertical resolution */ |
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double dstrsrc = 0.0; /* square source distribution */ |
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greg |
1.4 |
double shadthresh = .05; /* shadow threshold */ |
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greg |
1.5 |
double shadcert = .5; /* shadow certainty */ |
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greg |
1.20 |
int directrelay = 1; /* number of source relays */ |
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greg |
1.17 |
int vspretest = 512; /* virtual source pretest density */ |
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greg |
1.18 |
int directinvis = 0; /* sources invisible? */ |
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greg |
1.20 |
double srcsizerat = .25; /* maximum ratio source size/dist. */ |
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greg |
1.1 |
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greg |
2.4 |
double specthresh = .15; /* specular sampling threshold */ |
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greg |
2.3 |
double specjitter = 1.; /* specular sampling jitter */ |
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greg |
1.1 |
int maxdepth = 6; /* maximum recursion depth */ |
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double minweight = 4e-3; /* minimum ray weight */ |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
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greg |
1.6 |
int ambres = 32; /* ambient resolution */ |
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greg |
1.1 |
int ambdiv = 128; /* ambient divisions */ |
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int ambssamp = 0; /* ambient super-samples */ |
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int ambounce = 0; /* ambient bounces */ |
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char *amblist[128]; /* ambient include/exclude list */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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greg |
1.13 |
extern OBJREC Lamb; /* a Lambertian surface */ |
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greg |
1.1 |
static RAY thisray; /* for our convenience */ |
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greg |
2.5 |
static int oputo(), oputd(), oputv(), oputl(), oputL(), |
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greg |
1.1 |
oputp(), oputn(), oputs(), oputw(), oputm(); |
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static int (*ray_out[10])(), (*every_out[10])(); |
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greg |
1.11 |
static int castonly; |
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greg |
1.1 |
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greg |
1.10 |
static int puta(), putf(), putd(); |
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greg |
1.1 |
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static int (*putreal)(); |
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quit(code) /* quit program */ |
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int code; |
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{ |
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exit(code); |
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} |
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greg |
2.6 |
char * |
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formstr(f) /* return format identifier */ |
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int f; |
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{ |
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switch (f) { |
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case 'a': return("ascii"); |
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case 'f': return("float"); |
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case 'd': return("double"); |
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case 'c': return(COLRFMT); |
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} |
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return("unknown"); |
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} |
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greg |
1.1 |
rtrace(fname) /* trace rays from file */ |
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char *fname; |
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{ |
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long vcount = hresolu>1 ? hresolu*vresolu : vresolu; |
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long nextflush = hresolu; |
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FILE *fp; |
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greg |
1.2 |
FVECT orig, direc; |
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greg |
1.1 |
/* set up input */ |
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if (fname == NULL) |
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fp = stdin; |
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else if ((fp = fopen(fname, "r")) == NULL) { |
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sprintf(errmsg, "cannot open input file \"%s\"", fname); |
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error(SYSTEM, errmsg); |
120 |
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} |
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/* set up output */ |
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setoutput(outvals); |
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switch (outform) { |
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case 'a': putreal = puta; break; |
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case 'f': putreal = putf; break; |
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case 'd': putreal = putd; break; |
127 |
greg |
2.6 |
case 'c': |
128 |
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if (strcmp(outvals, "v")) |
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error(USER, "color format with value output only"); |
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break; |
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default: |
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error(CONSISTENCY, "botched output format"); |
133 |
greg |
1.1 |
} |
134 |
greg |
2.6 |
fputformat(formstr(outform), stdout); |
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putchar('\n'); |
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if (hresolu > 0 && vresolu > 0) |
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fprtresolu(hresolu, vresolu, stdout); |
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greg |
1.1 |
/* process file */ |
139 |
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while (getvec(orig, inform, fp) == 0 && |
140 |
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getvec(direc, inform, fp) == 0) { |
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142 |
greg |
1.7 |
if (normalize(direc) == 0.0) { /* zero ==> flush */ |
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fflush(stdout); |
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continue; |
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} |
146 |
greg |
1.14 |
samplendx++; |
147 |
greg |
1.1 |
/* compute and print */ |
148 |
greg |
1.13 |
if (imm_irrad) |
149 |
greg |
1.1 |
irrad(orig, direc); |
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else |
151 |
greg |
1.13 |
traceray(orig, direc); |
152 |
greg |
1.7 |
/* flush if time */ |
153 |
greg |
1.1 |
if (--nextflush == 0) { |
154 |
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fflush(stdout); |
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nextflush = hresolu; |
156 |
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} |
157 |
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if (ferror(stdout)) |
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error(SYSTEM, "write error"); |
159 |
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if (--vcount == 0) /* check for end */ |
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break; |
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} |
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if (vcount > 0) |
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error(USER, "read error"); |
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fclose(fp); |
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} |
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168 |
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setoutput(vs) /* set up output tables */ |
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register char *vs; |
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{ |
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extern int ourtrace(), (*trace)(); |
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register int (**table)() = ray_out; |
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174 |
greg |
1.11 |
castonly = 1; |
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greg |
1.1 |
while (*vs) |
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switch (*vs++) { |
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case 't': /* trace */ |
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*table = NULL; |
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table = every_out; |
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trace = ourtrace; |
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greg |
1.11 |
castonly = 0; |
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greg |
1.1 |
break; |
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case 'o': /* origin */ |
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*table++ = oputo; |
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break; |
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case 'd': /* direction */ |
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*table++ = oputd; |
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break; |
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case 'v': /* value */ |
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*table++ = oputv; |
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greg |
1.11 |
castonly = 0; |
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greg |
1.1 |
break; |
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greg |
2.5 |
case 'l': /* effective distance */ |
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greg |
1.1 |
*table++ = oputl; |
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greg |
1.11 |
castonly = 0; |
196 |
greg |
1.1 |
break; |
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greg |
2.5 |
case 'L': /* single ray length */ |
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*table++ = oputL; |
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break; |
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greg |
1.1 |
case 'p': /* point */ |
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*table++ = oputp; |
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break; |
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case 'n': /* normal */ |
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*table++ = oputn; |
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break; |
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case 's': /* surface */ |
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*table++ = oputs; |
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break; |
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case 'w': /* weight */ |
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*table++ = oputw; |
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break; |
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case 'm': /* modifier */ |
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*table++ = oputm; |
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break; |
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} |
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*table = NULL; |
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} |
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greg |
1.13 |
traceray(org, dir) /* compute and print ray value(s) */ |
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greg |
1.1 |
FVECT org, dir; |
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{ |
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register int (**tp)(); |
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VCOPY(thisray.rorg, org); |
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VCOPY(thisray.rdir, dir); |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
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greg |
1.11 |
if (castonly) |
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localhit(&thisray, &thescene) || sourcehit(&thisray); |
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else |
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rayvalue(&thisray); |
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greg |
1.1 |
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233 |
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if (ray_out[0] == NULL) |
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return; |
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for (tp = ray_out; *tp != NULL; tp++) |
236 |
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(**tp)(&thisray); |
237 |
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if (outform == 'a') |
238 |
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putchar('\n'); |
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} |
240 |
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241 |
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242 |
greg |
1.13 |
irrad(org, dir) /* compute immediate irradiance value */ |
243 |
greg |
1.1 |
FVECT org, dir; |
244 |
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{ |
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register int i; |
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247 |
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for (i = 0; i < 3; i++) { |
248 |
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thisray.rorg[i] = org[i] + dir[i]; |
249 |
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thisray.rdir[i] = -dir[i]; |
250 |
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} |
251 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
252 |
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/* pretend we hit surface */ |
253 |
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thisray.rot = 1.0; |
254 |
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thisray.rod = 1.0; |
255 |
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VCOPY(thisray.ron, dir); |
256 |
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for (i = 0; i < 3; i++) /* fudge factor */ |
257 |
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thisray.rop[i] = org[i] + 1e-4*dir[i]; |
258 |
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/* compute and print */ |
259 |
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
260 |
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oputv(&thisray); |
261 |
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if (outform == 'a') |
262 |
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putchar('\n'); |
263 |
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} |
264 |
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265 |
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266 |
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getvec(vec, fmt, fp) /* get a vector from fp */ |
267 |
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register FVECT vec; |
268 |
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int fmt; |
269 |
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FILE *fp; |
270 |
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{ |
271 |
greg |
1.19 |
extern char *fgetword(); |
272 |
greg |
1.1 |
static float vf[3]; |
273 |
greg |
2.5 |
static double vd[3]; |
274 |
greg |
1.19 |
char buf[32]; |
275 |
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register int i; |
276 |
greg |
1.1 |
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277 |
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switch (fmt) { |
278 |
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case 'a': /* ascii */ |
279 |
greg |
1.19 |
for (i = 0; i < 3; i++) { |
280 |
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if (fgetword(buf, sizeof(buf), fp) == NULL || |
281 |
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!isflt(buf)) |
282 |
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return(-1); |
283 |
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vec[i] = atof(buf); |
284 |
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} |
285 |
greg |
1.1 |
break; |
286 |
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case 'f': /* binary float */ |
287 |
greg |
1.8 |
if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
288 |
greg |
1.1 |
return(-1); |
289 |
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vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2]; |
290 |
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break; |
291 |
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case 'd': /* binary double */ |
292 |
greg |
2.5 |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
293 |
greg |
1.1 |
return(-1); |
294 |
greg |
2.5 |
vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2]; |
295 |
greg |
1.1 |
break; |
296 |
greg |
2.6 |
default: |
297 |
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error(CONSISTENCY, "botched input format"); |
298 |
greg |
1.1 |
} |
299 |
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return(0); |
300 |
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} |
301 |
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302 |
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303 |
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static |
304 |
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ourtrace(r) /* print ray values */ |
305 |
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RAY *r; |
306 |
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{ |
307 |
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register int (**tp)(); |
308 |
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309 |
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if (every_out[0] == NULL) |
310 |
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return; |
311 |
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tabin(r); |
312 |
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for (tp = every_out; *tp != NULL; tp++) |
313 |
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(**tp)(r); |
314 |
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putchar('\n'); |
315 |
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} |
316 |
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317 |
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318 |
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static |
319 |
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tabin(r) /* tab in appropriate amount */ |
320 |
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RAY *r; |
321 |
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{ |
322 |
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register RAY *rp; |
323 |
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324 |
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for (rp = r->parent; rp != NULL; rp = rp->parent) |
325 |
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putchar('\t'); |
326 |
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} |
327 |
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328 |
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329 |
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static |
330 |
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oputo(r) /* print origin */ |
331 |
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register RAY *r; |
332 |
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{ |
333 |
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(*putreal)(r->rorg[0]); |
334 |
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(*putreal)(r->rorg[1]); |
335 |
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(*putreal)(r->rorg[2]); |
336 |
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} |
337 |
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338 |
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339 |
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static |
340 |
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oputd(r) /* print direction */ |
341 |
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register RAY *r; |
342 |
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{ |
343 |
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(*putreal)(r->rdir[0]); |
344 |
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(*putreal)(r->rdir[1]); |
345 |
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(*putreal)(r->rdir[2]); |
346 |
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} |
347 |
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348 |
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349 |
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static |
350 |
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oputv(r) /* print value */ |
351 |
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register RAY *r; |
352 |
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{ |
353 |
greg |
2.6 |
COLR cout; |
354 |
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355 |
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if (outform == 'c') { |
356 |
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setcolr(cout, colval(r->rcol,RED), |
357 |
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colval(r->rcol,GRN), |
358 |
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colval(r->rcol,BLU)); |
359 |
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fwrite((char *)cout, sizeof(cout), 1, stdout); |
360 |
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return; |
361 |
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} |
362 |
greg |
1.1 |
(*putreal)(colval(r->rcol,RED)); |
363 |
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(*putreal)(colval(r->rcol,GRN)); |
364 |
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(*putreal)(colval(r->rcol,BLU)); |
365 |
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} |
366 |
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367 |
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368 |
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static |
369 |
greg |
2.5 |
oputl(r) /* print effective distance */ |
370 |
greg |
1.1 |
register RAY *r; |
371 |
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{ |
372 |
greg |
1.9 |
(*putreal)(r->rt); |
373 |
greg |
2.5 |
} |
374 |
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375 |
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376 |
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static |
377 |
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oputL(r) /* print single ray length */ |
378 |
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register RAY *r; |
379 |
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{ |
380 |
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(*putreal)(r->rot); |
381 |
greg |
1.1 |
} |
382 |
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383 |
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384 |
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static |
385 |
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oputp(r) /* print point */ |
386 |
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register RAY *r; |
387 |
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{ |
388 |
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if (r->rot < FHUGE) { |
389 |
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(*putreal)(r->rop[0]); |
390 |
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(*putreal)(r->rop[1]); |
391 |
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(*putreal)(r->rop[2]); |
392 |
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} else { |
393 |
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(*putreal)(0.0); |
394 |
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(*putreal)(0.0); |
395 |
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(*putreal)(0.0); |
396 |
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} |
397 |
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} |
398 |
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399 |
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400 |
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static |
401 |
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oputn(r) /* print normal */ |
402 |
|
|
register RAY *r; |
403 |
|
|
{ |
404 |
|
|
if (r->rot < FHUGE) { |
405 |
|
|
(*putreal)(r->ron[0]); |
406 |
|
|
(*putreal)(r->ron[1]); |
407 |
|
|
(*putreal)(r->ron[2]); |
408 |
|
|
} else { |
409 |
|
|
(*putreal)(0.0); |
410 |
|
|
(*putreal)(0.0); |
411 |
|
|
(*putreal)(0.0); |
412 |
|
|
} |
413 |
|
|
} |
414 |
|
|
|
415 |
|
|
|
416 |
|
|
static |
417 |
|
|
oputs(r) /* print name */ |
418 |
|
|
register RAY *r; |
419 |
|
|
{ |
420 |
|
|
if (r->ro != NULL) |
421 |
|
|
fputs(r->ro->oname, stdout); |
422 |
|
|
else |
423 |
|
|
putchar('*'); |
424 |
|
|
putchar('\t'); |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
|
428 |
|
|
static |
429 |
|
|
oputw(r) /* print weight */ |
430 |
|
|
register RAY *r; |
431 |
|
|
{ |
432 |
|
|
(*putreal)(r->rweight); |
433 |
|
|
} |
434 |
|
|
|
435 |
|
|
|
436 |
|
|
static |
437 |
|
|
oputm(r) /* print modifier */ |
438 |
|
|
register RAY *r; |
439 |
|
|
{ |
440 |
|
|
if (r->ro != NULL) |
441 |
|
|
fputs(objptr(r->ro->omod)->oname, stdout); |
442 |
|
|
else |
443 |
|
|
putchar('*'); |
444 |
|
|
putchar('\t'); |
445 |
|
|
} |
446 |
|
|
|
447 |
|
|
|
448 |
|
|
static |
449 |
|
|
puta(v) /* print ascii value */ |
450 |
|
|
double v; |
451 |
|
|
{ |
452 |
|
|
printf("%e\t", v); |
453 |
|
|
} |
454 |
|
|
|
455 |
|
|
|
456 |
|
|
static |
457 |
|
|
putd(v) /* print binary double */ |
458 |
|
|
double v; |
459 |
|
|
{ |
460 |
greg |
1.8 |
fwrite((char *)&v, sizeof(v), 1, stdout); |
461 |
greg |
1.1 |
} |
462 |
|
|
|
463 |
|
|
|
464 |
|
|
static |
465 |
|
|
putf(v) /* print binary float */ |
466 |
|
|
double v; |
467 |
|
|
{ |
468 |
|
|
float f = v; |
469 |
|
|
|
470 |
greg |
1.8 |
fwrite((char *)&f, sizeof(f), 1, stdout); |
471 |
greg |
1.1 |
} |