1 |
greg |
2.17 |
/* Copyright (c) 1994 Regents of the University of California */ |
2 |
greg |
1.1 |
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3 |
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#ifndef lint |
4 |
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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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13 |
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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. |
20 |
greg |
1.1 |
* All values default to ascii representation of real |
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* numbers. Binary representations can be selected |
22 |
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* with '-ff' for float or '-fd' for double. By default, |
23 |
greg |
1.13 |
* radiance is computed. The '-i' or '-I' options indicate that |
24 |
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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31 |
greg |
1.1 |
#include "otypes.h" |
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33 |
greg |
2.6 |
#include "resolu.h" |
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35 |
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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39 |
greg |
1.13 |
int imm_irrad = 0; /* compute immediate irradiance? */ |
40 |
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41 |
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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45 |
greg |
2.15 |
char *tralist[128]; /* list of modifers to trace (or no) */ |
46 |
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int traincl = -1; /* include == 1, exclude == 0 */ |
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#define MAXTSET 511 /* maximum number in trace set */ |
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OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */ |
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50 |
greg |
1.1 |
int hresolu = 0; /* horizontal (scan) size */ |
51 |
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int vresolu = 0; /* vertical resolution */ |
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53 |
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double dstrsrc = 0.0; /* square source distribution */ |
54 |
greg |
1.4 |
double shadthresh = .05; /* shadow threshold */ |
55 |
greg |
1.5 |
double shadcert = .5; /* shadow certainty */ |
56 |
greg |
1.20 |
int directrelay = 1; /* number of source relays */ |
57 |
greg |
1.17 |
int vspretest = 512; /* virtual source pretest density */ |
58 |
greg |
2.10 |
int directvis = 1; /* sources visible? */ |
59 |
greg |
1.20 |
double srcsizerat = .25; /* maximum ratio source size/dist. */ |
60 |
greg |
1.1 |
|
61 |
greg |
2.4 |
double specthresh = .15; /* specular sampling threshold */ |
62 |
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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67 |
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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 */ |
72 |
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int ambounce = 0; /* ambient bounces */ |
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char *amblist[128]; /* ambient include/exclude list */ |
74 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
75 |
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76 |
greg |
1.13 |
extern OBJREC Lamb; /* a Lambertian surface */ |
77 |
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78 |
greg |
1.1 |
static RAY thisray; /* for our convenience */ |
79 |
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80 |
greg |
2.5 |
static int oputo(), oputd(), oputv(), oputl(), oputL(), |
81 |
greg |
2.9 |
oputp(), oputn(), oputN(), oputs(), oputw(), oputm(); |
82 |
greg |
1.1 |
|
83 |
greg |
2.13 |
static int ourtrace(), tabin(); |
84 |
greg |
2.14 |
static int (*ray_out[16])(), (*every_out[16])(); |
85 |
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static int castonly = 0; |
86 |
greg |
1.1 |
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87 |
greg |
1.10 |
static int puta(), putf(), putd(); |
88 |
greg |
1.1 |
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89 |
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static int (*putreal)(); |
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92 |
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quit(code) /* quit program */ |
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int code; |
94 |
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{ |
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greg |
2.11 |
#ifndef NIX |
96 |
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headclean(); /* delete header file */ |
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pfclean(); /* clean up persist files */ |
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#endif |
99 |
greg |
1.1 |
exit(code); |
100 |
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} |
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102 |
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103 |
greg |
2.6 |
char * |
104 |
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formstr(f) /* return format identifier */ |
105 |
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int f; |
106 |
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{ |
107 |
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switch (f) { |
108 |
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case 'a': return("ascii"); |
109 |
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case 'f': return("float"); |
110 |
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case 'd': return("double"); |
111 |
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case 'c': return(COLRFMT); |
112 |
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} |
113 |
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return("unknown"); |
114 |
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} |
115 |
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116 |
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117 |
greg |
1.1 |
rtrace(fname) /* trace rays from file */ |
118 |
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char *fname; |
119 |
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{ |
120 |
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long vcount = hresolu>1 ? hresolu*vresolu : vresolu; |
121 |
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long nextflush = hresolu; |
122 |
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FILE *fp; |
123 |
greg |
1.2 |
FVECT orig, direc; |
124 |
greg |
1.1 |
/* set up input */ |
125 |
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if (fname == NULL) |
126 |
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fp = stdin; |
127 |
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else if ((fp = fopen(fname, "r")) == NULL) { |
128 |
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sprintf(errmsg, "cannot open input file \"%s\"", fname); |
129 |
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error(SYSTEM, errmsg); |
130 |
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} |
131 |
greg |
2.8 |
#ifdef MSDOS |
132 |
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if (inform != 'a') |
133 |
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setmode(fileno(fp), O_BINARY); |
134 |
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#endif |
135 |
greg |
1.1 |
/* set up output */ |
136 |
greg |
2.16 |
setoutput(outvals); |
137 |
greg |
1.1 |
switch (outform) { |
138 |
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case 'a': putreal = puta; break; |
139 |
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case 'f': putreal = putf; break; |
140 |
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case 'd': putreal = putd; break; |
141 |
greg |
2.6 |
case 'c': |
142 |
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if (strcmp(outvals, "v")) |
143 |
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error(USER, "color format with value output only"); |
144 |
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break; |
145 |
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default: |
146 |
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error(CONSISTENCY, "botched output format"); |
147 |
greg |
1.1 |
} |
148 |
greg |
2.12 |
if (hresolu > 0) { |
149 |
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if (vresolu > 0) |
150 |
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fprtresolu(hresolu, vresolu, stdout); |
151 |
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fflush(stdout); |
152 |
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} |
153 |
greg |
1.1 |
/* process file */ |
154 |
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while (getvec(orig, inform, fp) == 0 && |
155 |
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getvec(direc, inform, fp) == 0) { |
156 |
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157 |
greg |
1.7 |
if (normalize(direc) == 0.0) { /* zero ==> flush */ |
158 |
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fflush(stdout); |
159 |
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continue; |
160 |
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} |
161 |
greg |
1.14 |
samplendx++; |
162 |
greg |
1.1 |
/* compute and print */ |
163 |
greg |
1.13 |
if (imm_irrad) |
164 |
greg |
1.1 |
irrad(orig, direc); |
165 |
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else |
166 |
greg |
2.16 |
rad(orig, direc); |
167 |
greg |
1.7 |
/* flush if time */ |
168 |
greg |
1.1 |
if (--nextflush == 0) { |
169 |
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fflush(stdout); |
170 |
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nextflush = hresolu; |
171 |
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} |
172 |
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if (ferror(stdout)) |
173 |
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error(SYSTEM, "write error"); |
174 |
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if (--vcount == 0) /* check for end */ |
175 |
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break; |
176 |
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} |
177 |
greg |
2.12 |
fflush(stdout); |
178 |
greg |
1.1 |
if (vcount > 0) |
179 |
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error(USER, "read error"); |
180 |
greg |
2.12 |
if (fname != NULL) |
181 |
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fclose(fp); |
182 |
greg |
1.1 |
} |
183 |
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184 |
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185 |
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setoutput(vs) /* set up output tables */ |
186 |
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register char *vs; |
187 |
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{ |
188 |
greg |
2.13 |
extern int (*trace)(); |
189 |
greg |
1.1 |
register int (**table)() = ray_out; |
190 |
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191 |
greg |
1.11 |
castonly = 1; |
192 |
greg |
1.1 |
while (*vs) |
193 |
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switch (*vs++) { |
194 |
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case 't': /* trace */ |
195 |
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*table = NULL; |
196 |
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table = every_out; |
197 |
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trace = ourtrace; |
198 |
greg |
1.11 |
castonly = 0; |
199 |
greg |
1.1 |
break; |
200 |
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case 'o': /* origin */ |
201 |
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*table++ = oputo; |
202 |
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break; |
203 |
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case 'd': /* direction */ |
204 |
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*table++ = oputd; |
205 |
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break; |
206 |
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case 'v': /* value */ |
207 |
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*table++ = oputv; |
208 |
greg |
1.11 |
castonly = 0; |
209 |
greg |
1.1 |
break; |
210 |
greg |
2.5 |
case 'l': /* effective distance */ |
211 |
greg |
1.1 |
*table++ = oputl; |
212 |
greg |
1.11 |
castonly = 0; |
213 |
greg |
1.1 |
break; |
214 |
greg |
2.5 |
case 'L': /* single ray length */ |
215 |
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*table++ = oputL; |
216 |
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break; |
217 |
greg |
1.1 |
case 'p': /* point */ |
218 |
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*table++ = oputp; |
219 |
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break; |
220 |
greg |
2.9 |
case 'n': /* perturbed normal */ |
221 |
greg |
1.1 |
*table++ = oputn; |
222 |
greg |
2.9 |
castonly = 0; |
223 |
greg |
1.1 |
break; |
224 |
greg |
2.9 |
case 'N': /* unperturbed normal */ |
225 |
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*table++ = oputN; |
226 |
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break; |
227 |
greg |
1.1 |
case 's': /* surface */ |
228 |
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*table++ = oputs; |
229 |
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break; |
230 |
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case 'w': /* weight */ |
231 |
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*table++ = oputw; |
232 |
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break; |
233 |
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case 'm': /* modifier */ |
234 |
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*table++ = oputm; |
235 |
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break; |
236 |
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} |
237 |
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*table = NULL; |
238 |
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} |
239 |
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240 |
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241 |
greg |
2.16 |
rad(org, dir) /* compute and print ray value(s) */ |
242 |
greg |
1.1 |
FVECT org, dir; |
243 |
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{ |
244 |
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VCOPY(thisray.rorg, org); |
245 |
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VCOPY(thisray.rdir, dir); |
246 |
greg |
2.17 |
thisray.rmax = 0.0; |
247 |
greg |
1.1 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
248 |
greg |
1.11 |
if (castonly) |
249 |
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localhit(&thisray, &thescene) || sourcehit(&thisray); |
250 |
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else |
251 |
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rayvalue(&thisray); |
252 |
greg |
2.16 |
printvals(&thisray); |
253 |
greg |
1.1 |
} |
254 |
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255 |
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256 |
greg |
1.13 |
irrad(org, dir) /* compute immediate irradiance value */ |
257 |
greg |
1.1 |
FVECT org, dir; |
258 |
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{ |
259 |
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register int i; |
260 |
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261 |
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for (i = 0; i < 3; i++) { |
262 |
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thisray.rorg[i] = org[i] + dir[i]; |
263 |
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thisray.rdir[i] = -dir[i]; |
264 |
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} |
265 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
266 |
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/* pretend we hit surface */ |
267 |
greg |
2.16 |
thisray.rot = 1.0-1e-4; |
268 |
greg |
1.1 |
thisray.rod = 1.0; |
269 |
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VCOPY(thisray.ron, dir); |
270 |
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for (i = 0; i < 3; i++) /* fudge factor */ |
271 |
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thisray.rop[i] = org[i] + 1e-4*dir[i]; |
272 |
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/* compute and print */ |
273 |
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
274 |
greg |
2.16 |
printvals(&thisray); |
275 |
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} |
276 |
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277 |
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278 |
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printvals(r) /* print requested ray values */ |
279 |
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RAY *r; |
280 |
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{ |
281 |
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register int (**tp)(); |
282 |
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283 |
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if (ray_out[0] == NULL) |
284 |
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return; |
285 |
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for (tp = ray_out; *tp != NULL; tp++) |
286 |
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(**tp)(r); |
287 |
greg |
1.1 |
if (outform == 'a') |
288 |
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putchar('\n'); |
289 |
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} |
290 |
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291 |
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292 |
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getvec(vec, fmt, fp) /* get a vector from fp */ |
293 |
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register FVECT vec; |
294 |
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int fmt; |
295 |
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FILE *fp; |
296 |
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{ |
297 |
greg |
1.19 |
extern char *fgetword(); |
298 |
greg |
1.1 |
static float vf[3]; |
299 |
greg |
2.5 |
static double vd[3]; |
300 |
greg |
1.19 |
char buf[32]; |
301 |
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register int i; |
302 |
greg |
1.1 |
|
303 |
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switch (fmt) { |
304 |
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case 'a': /* ascii */ |
305 |
greg |
1.19 |
for (i = 0; i < 3; i++) { |
306 |
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if (fgetword(buf, sizeof(buf), fp) == NULL || |
307 |
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!isflt(buf)) |
308 |
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return(-1); |
309 |
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vec[i] = atof(buf); |
310 |
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} |
311 |
greg |
1.1 |
break; |
312 |
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case 'f': /* binary float */ |
313 |
greg |
1.8 |
if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
314 |
greg |
1.1 |
return(-1); |
315 |
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vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2]; |
316 |
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break; |
317 |
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case 'd': /* binary double */ |
318 |
greg |
2.5 |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
319 |
greg |
1.1 |
return(-1); |
320 |
greg |
2.5 |
vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2]; |
321 |
greg |
1.1 |
break; |
322 |
greg |
2.6 |
default: |
323 |
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error(CONSISTENCY, "botched input format"); |
324 |
greg |
1.1 |
} |
325 |
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return(0); |
326 |
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} |
327 |
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328 |
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329 |
greg |
2.15 |
tranotify(obj) /* record new modifier */ |
330 |
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OBJECT obj; |
331 |
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{ |
332 |
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static int hitlimit = 0; |
333 |
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register OBJREC *o = objptr(obj); |
334 |
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register char **tralp; |
335 |
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336 |
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if (hitlimit || !ismodifier(o->otype)) |
337 |
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return; |
338 |
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for (tralp = tralist; *tralp != NULL; tralp++) |
339 |
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if (!strcmp(o->oname, *tralp)) { |
340 |
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if (traset[0] >= MAXTSET) { |
341 |
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error(WARNING, "too many modifiers in trace list"); |
342 |
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hitlimit++; |
343 |
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return; /* should this be fatal? */ |
344 |
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} |
345 |
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insertelem(traset, obj); |
346 |
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return; |
347 |
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} |
348 |
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} |
349 |
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350 |
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|
351 |
greg |
1.1 |
static |
352 |
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ourtrace(r) /* print ray values */ |
353 |
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RAY *r; |
354 |
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{ |
355 |
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register int (**tp)(); |
356 |
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357 |
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if (every_out[0] == NULL) |
358 |
greg |
2.15 |
return; |
359 |
greg |
2.16 |
if (r->ro == NULL) { |
360 |
|
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if (traincl == 1) |
361 |
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return; |
362 |
|
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} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
363 |
greg |
1.1 |
return; |
364 |
|
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tabin(r); |
365 |
|
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for (tp = every_out; *tp != NULL; tp++) |
366 |
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(**tp)(r); |
367 |
|
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putchar('\n'); |
368 |
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} |
369 |
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370 |
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371 |
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static |
372 |
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tabin(r) /* tab in appropriate amount */ |
373 |
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RAY *r; |
374 |
|
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{ |
375 |
|
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register RAY *rp; |
376 |
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377 |
|
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for (rp = r->parent; rp != NULL; rp = rp->parent) |
378 |
|
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putchar('\t'); |
379 |
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} |
380 |
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381 |
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382 |
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static |
383 |
|
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oputo(r) /* print origin */ |
384 |
|
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register RAY *r; |
385 |
|
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{ |
386 |
|
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(*putreal)(r->rorg[0]); |
387 |
|
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(*putreal)(r->rorg[1]); |
388 |
|
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(*putreal)(r->rorg[2]); |
389 |
|
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} |
390 |
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391 |
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392 |
|
|
static |
393 |
|
|
oputd(r) /* print direction */ |
394 |
|
|
register RAY *r; |
395 |
|
|
{ |
396 |
|
|
(*putreal)(r->rdir[0]); |
397 |
|
|
(*putreal)(r->rdir[1]); |
398 |
|
|
(*putreal)(r->rdir[2]); |
399 |
|
|
} |
400 |
|
|
|
401 |
|
|
|
402 |
|
|
static |
403 |
|
|
oputv(r) /* print value */ |
404 |
|
|
register RAY *r; |
405 |
|
|
{ |
406 |
greg |
2.6 |
COLR cout; |
407 |
|
|
|
408 |
|
|
if (outform == 'c') { |
409 |
|
|
setcolr(cout, colval(r->rcol,RED), |
410 |
|
|
colval(r->rcol,GRN), |
411 |
|
|
colval(r->rcol,BLU)); |
412 |
|
|
fwrite((char *)cout, sizeof(cout), 1, stdout); |
413 |
|
|
return; |
414 |
|
|
} |
415 |
greg |
1.1 |
(*putreal)(colval(r->rcol,RED)); |
416 |
|
|
(*putreal)(colval(r->rcol,GRN)); |
417 |
|
|
(*putreal)(colval(r->rcol,BLU)); |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
|
421 |
|
|
static |
422 |
greg |
2.5 |
oputl(r) /* print effective distance */ |
423 |
greg |
1.1 |
register RAY *r; |
424 |
|
|
{ |
425 |
greg |
1.9 |
(*putreal)(r->rt); |
426 |
greg |
2.5 |
} |
427 |
|
|
|
428 |
|
|
|
429 |
|
|
static |
430 |
|
|
oputL(r) /* print single ray length */ |
431 |
|
|
register RAY *r; |
432 |
|
|
{ |
433 |
|
|
(*putreal)(r->rot); |
434 |
greg |
1.1 |
} |
435 |
|
|
|
436 |
|
|
|
437 |
|
|
static |
438 |
|
|
oputp(r) /* print point */ |
439 |
|
|
register RAY *r; |
440 |
|
|
{ |
441 |
|
|
if (r->rot < FHUGE) { |
442 |
|
|
(*putreal)(r->rop[0]); |
443 |
|
|
(*putreal)(r->rop[1]); |
444 |
|
|
(*putreal)(r->rop[2]); |
445 |
|
|
} else { |
446 |
|
|
(*putreal)(0.0); |
447 |
|
|
(*putreal)(0.0); |
448 |
|
|
(*putreal)(0.0); |
449 |
|
|
} |
450 |
|
|
} |
451 |
|
|
|
452 |
|
|
|
453 |
|
|
static |
454 |
greg |
2.9 |
oputN(r) /* print unperturbed normal */ |
455 |
greg |
1.1 |
register RAY *r; |
456 |
|
|
{ |
457 |
|
|
if (r->rot < FHUGE) { |
458 |
|
|
(*putreal)(r->ron[0]); |
459 |
|
|
(*putreal)(r->ron[1]); |
460 |
|
|
(*putreal)(r->ron[2]); |
461 |
|
|
} else { |
462 |
|
|
(*putreal)(0.0); |
463 |
|
|
(*putreal)(0.0); |
464 |
|
|
(*putreal)(0.0); |
465 |
|
|
} |
466 |
greg |
2.9 |
} |
467 |
|
|
|
468 |
|
|
|
469 |
|
|
static |
470 |
|
|
oputn(r) /* print perturbed normal */ |
471 |
|
|
RAY *r; |
472 |
|
|
{ |
473 |
|
|
FVECT pnorm; |
474 |
|
|
|
475 |
|
|
if (r->rot >= FHUGE) { |
476 |
|
|
(*putreal)(0.0); |
477 |
|
|
(*putreal)(0.0); |
478 |
|
|
(*putreal)(0.0); |
479 |
|
|
return; |
480 |
|
|
} |
481 |
|
|
raynormal(pnorm, r); |
482 |
|
|
(*putreal)(pnorm[0]); |
483 |
|
|
(*putreal)(pnorm[1]); |
484 |
|
|
(*putreal)(pnorm[2]); |
485 |
greg |
1.1 |
} |
486 |
|
|
|
487 |
|
|
|
488 |
|
|
static |
489 |
|
|
oputs(r) /* print name */ |
490 |
|
|
register RAY *r; |
491 |
|
|
{ |
492 |
|
|
if (r->ro != NULL) |
493 |
|
|
fputs(r->ro->oname, stdout); |
494 |
|
|
else |
495 |
|
|
putchar('*'); |
496 |
|
|
putchar('\t'); |
497 |
|
|
} |
498 |
|
|
|
499 |
|
|
|
500 |
|
|
static |
501 |
|
|
oputw(r) /* print weight */ |
502 |
|
|
register RAY *r; |
503 |
|
|
{ |
504 |
|
|
(*putreal)(r->rweight); |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
|
508 |
|
|
static |
509 |
|
|
oputm(r) /* print modifier */ |
510 |
|
|
register RAY *r; |
511 |
|
|
{ |
512 |
|
|
if (r->ro != NULL) |
513 |
|
|
fputs(objptr(r->ro->omod)->oname, stdout); |
514 |
|
|
else |
515 |
|
|
putchar('*'); |
516 |
|
|
putchar('\t'); |
517 |
|
|
} |
518 |
|
|
|
519 |
|
|
|
520 |
|
|
static |
521 |
|
|
puta(v) /* print ascii value */ |
522 |
|
|
double v; |
523 |
|
|
{ |
524 |
|
|
printf("%e\t", v); |
525 |
|
|
} |
526 |
|
|
|
527 |
|
|
|
528 |
|
|
static |
529 |
|
|
putd(v) /* print binary double */ |
530 |
|
|
double v; |
531 |
|
|
{ |
532 |
greg |
1.8 |
fwrite((char *)&v, sizeof(v), 1, stdout); |
533 |
greg |
1.1 |
} |
534 |
|
|
|
535 |
|
|
|
536 |
|
|
static |
537 |
|
|
putf(v) /* print binary float */ |
538 |
|
|
double v; |
539 |
|
|
{ |
540 |
|
|
float f = v; |
541 |
|
|
|
542 |
greg |
1.8 |
fwrite((char *)&f, sizeof(f), 1, stdout); |
543 |
greg |
1.1 |
} |