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/* Copyright (c) 1986 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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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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#include "copyright.h" |
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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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* If the direction vector is (0,0,0), then the output is flushed. |
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* 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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* radiance is computed. The '-i' option indicates that |
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* radiance is computed. The '-i' or '-I' options indicate that |
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* irradiance values are desired. |
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*/ |
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|
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#include "ray.h" |
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#include <time.h> |
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|
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#include "platform.h" |
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#include "ray.h" |
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#include "otypes.h" |
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#include "resolu.h" |
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|
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CUBE thescene; /* our scene */ |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
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|
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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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|
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int imm_irrad = 0; /* compute immediate irradiance? */ |
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int lim_dist = 0; /* limit distance? */ |
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|
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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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|
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int do_irrad = 0; /* compute irradiance? */ |
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|
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void (*trace)() = NULL; /* trace call */ |
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|
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extern void ambnotify(), tranotify(); |
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void (*addobjnotify[])() = {ambnotify, tranotify, NULL}; |
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char *tralist[128]; /* list of modifers to trace (or no) */ |
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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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|
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int hresolu = 0; /* horizontal (scan) size */ |
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int vresolu = 0; /* vertical resolution */ |
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|
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .03; /* shadow threshold */ |
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double shadcert = .75; /* shadow certainty */ |
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int directrelay = 2; /* number of source relays */ |
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int vspretest = 512; /* virtual source pretest density */ |
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int directvis = 1; /* sources visible? */ |
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double srcsizerat = .2; /* maximum ratio source size/dist. */ |
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|
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int maxdepth = 6; /* maximum recursion depth */ |
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double minweight = 4e-3; /* minimum ray weight */ |
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
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COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
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double seccg = 0.; /* global scattering eccentricity */ |
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double ssampdist = 0.; /* scatter sampling distance */ |
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|
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double specthresh = .15; /* specular sampling threshold */ |
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double specjitter = 1.; /* specular sampling jitter */ |
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|
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int backvis = 1; /* back face visibility */ |
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|
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int maxdepth = 8; /* maximum recursion depth */ |
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double minweight = 2e-3; /* minimum ray weight */ |
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|
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char *ambfile = NULL; /* ambient file name */ |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
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int ambres = 128; /* ambient resolution */ |
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int ambdiv = 128; /* ambient divisions */ |
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int ambssamp = 0; /* ambient super-samples */ |
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int ambvwt = 0; /* initial weight for ambient value */ |
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double ambacc = 0.15; /* ambient accuracy */ |
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int ambres = 256; /* ambient resolution */ |
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int ambdiv = 1024; /* ambient divisions */ |
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int ambssamp = 512; /* 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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|
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|
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static RAY thisray; /* for our convenience */ |
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|
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extern int oputo(), oputd(), oputv(), oputl(), |
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oputp(), oputn(), oputs(), oputw(), oputm(); |
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static void oputo(), oputd(), oputv(), oputl(), oputL(), oputc(), |
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oputp(), oputn(), oputN(), oputs(), oputw(), oputm(); |
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|
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static int (*ray_out[10])(), (*every_out[10])(); |
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static void ourtrace(), tabin(); |
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static void (*ray_out[16])(), (*every_out[16])(); |
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static int castonly = 0; |
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|
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extern int puta(), putf(), putd(); |
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static void puta(), putf(), putd(); |
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|
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static int (*putreal)(); |
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static void (*putreal)(); |
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|
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void bogusray(), rad(), irrad(), printvals(); |
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|
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|
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void |
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quit(code) /* quit program */ |
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int code; |
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{ |
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#ifndef NON_POSIX /* XXX we don't clean up elsewhere? */ |
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headclean(); /* delete header file */ |
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pfclean(); /* clean up persist files */ |
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#endif |
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exit(code); |
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} |
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|
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|
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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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|
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|
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void |
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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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FVECT orig, direc, vcol; |
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double d; |
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FVECT orig, direc; |
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/* set up input */ |
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if (fname == NULL) |
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fp = stdin; |
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sprintf(errmsg, "cannot open input file \"%s\"", fname); |
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error(SYSTEM, errmsg); |
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} |
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#ifdef _WIN32 |
151 |
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if (inform != 'a') |
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SET_FILE_BINARY(fp); |
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#endif |
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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; |
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case 'c': |
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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"); |
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} |
167 |
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if (hresolu > 0) { |
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if (vresolu > 0) |
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fprtresolu(hresolu, vresolu, stdout); |
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fflush(stdout); |
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} |
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/* process file */ |
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while (getvec(orig, inform, fp) == 0 && |
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getvec(direc, inform, fp) == 0) { |
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|
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if (normalize(direc) == 0.0) |
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error(USER, "zero direction vector"); |
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d = normalize(direc); |
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if (d == 0.0) { /* zero ==> flush */ |
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bogusray(); |
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if (--nextflush <= 0 || vcount <= 0) { |
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fflush(stdout); |
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nextflush = hresolu; |
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} |
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} else { |
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samplendx++; |
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/* compute and print */ |
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if (outvals[0] == 'i') |
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irrad(orig, direc); |
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else |
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radiance(orig, direc); |
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/* flush if requested */ |
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if (--nextflush == 0) { |
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fflush(stdout); |
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nextflush = hresolu; |
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if (imm_irrad) |
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irrad(orig, direc); |
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else |
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rad(orig, direc, lim_dist ? d : 0.0); |
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/* flush if time */ |
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if (--nextflush == 0) { |
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fflush(stdout); |
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nextflush = hresolu; |
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} |
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} |
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if (ferror(stdout)) |
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error(SYSTEM, "write error"); |
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if (--vcount == 0) /* check for end */ |
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break; |
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} |
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fflush(stdout); |
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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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if (fname != NULL) |
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fclose(fp); |
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} |
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|
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|
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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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extern void (*trace)(); |
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register void (**table)() = ray_out; |
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|
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castonly = 1; |
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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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castonly = 0; |
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break; |
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case 'o': /* origin */ |
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*table++ = oputo; |
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break; |
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case 'v': /* value */ |
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*table++ = oputv; |
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castonly = 0; |
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break; |
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case 'l': /* length */ |
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case 'l': /* effective distance */ |
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*table++ = oputl; |
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castonly = 0; |
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break; |
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case 'c': /* local coordinates */ |
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*table++ = oputc; |
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break; |
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case 'L': /* single ray length */ |
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*table++ = oputL; |
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break; |
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case 'p': /* point */ |
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*table++ = oputp; |
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break; |
247 |
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case 'n': /* normal */ |
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case 'n': /* perturbed normal */ |
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*table++ = oputn; |
249 |
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castonly = 0; |
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break; |
251 |
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case 'N': /* unperturbed normal */ |
252 |
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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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} |
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|
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|
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< |
radiance(org, dir) /* compute radiance value */ |
269 |
< |
FVECT org, dir; |
268 |
> |
void |
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bogusray() /* print out empty record */ |
270 |
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{ |
271 |
< |
register int (**tp)(); |
271 |
> |
thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] = |
272 |
> |
thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0; |
273 |
> |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
274 |
> |
printvals(&thisray); |
275 |
> |
} |
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|
277 |
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|
278 |
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void |
279 |
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rad(org, dir, dmax) /* compute and print ray value(s) */ |
280 |
+ |
FVECT org, dir; |
281 |
+ |
double dmax; |
282 |
+ |
{ |
283 |
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VCOPY(thisray.rorg, org); |
284 |
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VCOPY(thisray.rdir, dir); |
285 |
+ |
thisray.rmax = dmax; |
286 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
287 |
< |
rayvalue(&thisray); |
288 |
< |
|
289 |
< |
if (ray_out[0] == NULL) |
290 |
< |
return; |
291 |
< |
for (tp = ray_out; *tp != NULL; tp++) |
292 |
< |
(**tp)(&thisray); |
293 |
< |
if (outform == 'a') |
294 |
< |
putchar('\n'); |
287 |
> |
if (castonly) { |
288 |
> |
if (!localhit(&thisray, &thescene)) { |
289 |
> |
if (thisray.ro == &Aftplane) { /* clipped */ |
290 |
> |
thisray.ro = NULL; |
291 |
> |
thisray.rot = FHUGE; |
292 |
> |
} else |
293 |
> |
sourcehit(&thisray); |
294 |
> |
} |
295 |
> |
} else |
296 |
> |
rayvalue(&thisray); |
297 |
> |
printvals(&thisray); |
298 |
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} |
299 |
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|
300 |
|
|
301 |
< |
irrad(org, dir) /* compute irradiance value */ |
301 |
> |
void |
302 |
> |
irrad(org, dir) /* compute immediate irradiance value */ |
303 |
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FVECT org, dir; |
304 |
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{ |
185 |
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static double Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
186 |
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static OBJREC Lamb = { |
187 |
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OVOID, MAT_PLASTIC, "Lambertian", |
188 |
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{0, 5, NULL, Lambfa}, NULL, -1, |
189 |
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}; |
305 |
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register int i; |
306 |
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|
307 |
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for (i = 0; i < 3; i++) { |
310 |
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} |
311 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
312 |
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/* pretend we hit surface */ |
313 |
< |
thisray.rot = 1.0; |
313 |
> |
thisray.rot = 1.0-1e-4; |
314 |
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thisray.rod = 1.0; |
315 |
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VCOPY(thisray.ron, dir); |
316 |
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for (i = 0; i < 3; i++) /* fudge factor */ |
317 |
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thisray.rop[i] = org[i] + 1e-4*dir[i]; |
318 |
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/* compute and print */ |
319 |
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
320 |
< |
oputv(&thisray); |
320 |
> |
printvals(&thisray); |
321 |
> |
} |
322 |
> |
|
323 |
> |
|
324 |
> |
void |
325 |
> |
printvals(r) /* print requested ray values */ |
326 |
> |
RAY *r; |
327 |
> |
{ |
328 |
> |
register void (**tp)(); |
329 |
> |
|
330 |
> |
if (ray_out[0] == NULL) |
331 |
> |
return; |
332 |
> |
for (tp = ray_out; *tp != NULL; tp++) |
333 |
> |
(**tp)(r); |
334 |
|
if (outform == 'a') |
335 |
|
putchar('\n'); |
336 |
|
} |
337 |
|
|
338 |
|
|
339 |
+ |
int |
340 |
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getvec(vec, fmt, fp) /* get a vector from fp */ |
341 |
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register FVECT vec; |
342 |
|
int fmt; |
343 |
|
FILE *fp; |
344 |
|
{ |
345 |
|
static float vf[3]; |
346 |
+ |
static double vd[3]; |
347 |
+ |
char buf[32]; |
348 |
+ |
register int i; |
349 |
|
|
350 |
|
switch (fmt) { |
351 |
|
case 'a': /* ascii */ |
352 |
< |
if (fscanf(fp, "%lf %lf %lf", vec, vec+1, vec+2) != 3) |
353 |
< |
return(-1); |
352 |
> |
for (i = 0; i < 3; i++) { |
353 |
> |
if (fgetword(buf, sizeof(buf), fp) == NULL || |
354 |
> |
!isflt(buf)) |
355 |
> |
return(-1); |
356 |
> |
vec[i] = atof(buf); |
357 |
> |
} |
358 |
|
break; |
359 |
|
case 'f': /* binary float */ |
360 |
< |
if (fread(vf, sizeof(float), 3, fp) != 3) |
360 |
> |
if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
361 |
|
return(-1); |
362 |
|
vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2]; |
363 |
|
break; |
364 |
|
case 'd': /* binary double */ |
365 |
< |
if (fread(vec, sizeof(double), 3, fp) != 3) |
365 |
> |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
366 |
|
return(-1); |
367 |
+ |
vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2]; |
368 |
|
break; |
369 |
+ |
default: |
370 |
+ |
error(CONSISTENCY, "botched input format"); |
371 |
|
} |
372 |
|
return(0); |
373 |
|
} |
374 |
|
|
375 |
|
|
376 |
< |
static |
376 |
> |
void |
377 |
> |
tranotify(obj) /* record new modifier */ |
378 |
> |
OBJECT obj; |
379 |
> |
{ |
380 |
> |
static int hitlimit = 0; |
381 |
> |
register OBJREC *o = objptr(obj); |
382 |
> |
register char **tralp; |
383 |
> |
|
384 |
> |
if (obj == OVOID) { /* starting over */ |
385 |
> |
traset[0] = 0; |
386 |
> |
hitlimit = 0; |
387 |
> |
return; |
388 |
> |
} |
389 |
> |
if (hitlimit || !ismodifier(o->otype)) |
390 |
> |
return; |
391 |
> |
for (tralp = tralist; *tralp != NULL; tralp++) |
392 |
> |
if (!strcmp(o->oname, *tralp)) { |
393 |
> |
if (traset[0] >= MAXTSET) { |
394 |
> |
error(WARNING, "too many modifiers in trace list"); |
395 |
> |
hitlimit++; |
396 |
> |
return; /* should this be fatal? */ |
397 |
> |
} |
398 |
> |
insertelem(traset, obj); |
399 |
> |
return; |
400 |
> |
} |
401 |
> |
} |
402 |
> |
|
403 |
> |
|
404 |
> |
static void |
405 |
|
ourtrace(r) /* print ray values */ |
406 |
|
RAY *r; |
407 |
|
{ |
408 |
< |
register int (**tp)(); |
408 |
> |
register void (**tp)(); |
409 |
|
|
410 |
|
if (every_out[0] == NULL) |
411 |
|
return; |
412 |
+ |
if (r->ro == NULL) { |
413 |
+ |
if (traincl == 1) |
414 |
+ |
return; |
415 |
+ |
} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
416 |
+ |
return; |
417 |
|
tabin(r); |
418 |
|
for (tp = every_out; *tp != NULL; tp++) |
419 |
|
(**tp)(r); |
421 |
|
} |
422 |
|
|
423 |
|
|
424 |
< |
static |
424 |
> |
static void |
425 |
|
tabin(r) /* tab in appropriate amount */ |
426 |
|
RAY *r; |
427 |
|
{ |
432 |
|
} |
433 |
|
|
434 |
|
|
435 |
< |
static |
435 |
> |
static void |
436 |
|
oputo(r) /* print origin */ |
437 |
< |
register RAY *r; |
437 |
> |
RAY *r; |
438 |
|
{ |
439 |
|
(*putreal)(r->rorg[0]); |
440 |
|
(*putreal)(r->rorg[1]); |
442 |
|
} |
443 |
|
|
444 |
|
|
445 |
< |
static |
445 |
> |
static void |
446 |
|
oputd(r) /* print direction */ |
447 |
< |
register RAY *r; |
447 |
> |
RAY *r; |
448 |
|
{ |
449 |
|
(*putreal)(r->rdir[0]); |
450 |
|
(*putreal)(r->rdir[1]); |
452 |
|
} |
453 |
|
|
454 |
|
|
455 |
< |
static |
455 |
> |
static void |
456 |
|
oputv(r) /* print value */ |
457 |
< |
register RAY *r; |
457 |
> |
RAY *r; |
458 |
|
{ |
459 |
+ |
COLR cout; |
460 |
+ |
|
461 |
+ |
if (outform == 'c') { |
462 |
+ |
setcolr(cout, colval(r->rcol,RED), |
463 |
+ |
colval(r->rcol,GRN), |
464 |
+ |
colval(r->rcol,BLU)); |
465 |
+ |
fwrite((char *)cout, sizeof(cout), 1, stdout); |
466 |
+ |
return; |
467 |
+ |
} |
468 |
|
(*putreal)(colval(r->rcol,RED)); |
469 |
|
(*putreal)(colval(r->rcol,GRN)); |
470 |
|
(*putreal)(colval(r->rcol,BLU)); |
471 |
|
} |
472 |
|
|
473 |
|
|
474 |
< |
static |
475 |
< |
oputl(r) /* print length */ |
476 |
< |
register RAY *r; |
474 |
> |
static void |
475 |
> |
oputl(r) /* print effective distance */ |
476 |
> |
RAY *r; |
477 |
|
{ |
478 |
< |
if (r->rot < FHUGE) |
298 |
< |
(*putreal)(r->rot); |
299 |
< |
else |
300 |
< |
(*putreal)(0.0); |
478 |
> |
(*putreal)(r->rt); |
479 |
|
} |
480 |
|
|
481 |
|
|
482 |
< |
static |
482 |
> |
static void |
483 |
> |
oputL(r) /* print single ray length */ |
484 |
> |
RAY *r; |
485 |
> |
{ |
486 |
> |
(*putreal)(r->rot); |
487 |
> |
} |
488 |
> |
|
489 |
> |
|
490 |
> |
static void |
491 |
> |
oputc(r) /* print local coordinates */ |
492 |
> |
RAY *r; |
493 |
> |
{ |
494 |
> |
(*putreal)(r->uv[0]); |
495 |
> |
(*putreal)(r->uv[1]); |
496 |
> |
} |
497 |
> |
|
498 |
> |
|
499 |
> |
static void |
500 |
|
oputp(r) /* print point */ |
501 |
< |
register RAY *r; |
501 |
> |
RAY *r; |
502 |
|
{ |
503 |
|
if (r->rot < FHUGE) { |
504 |
|
(*putreal)(r->rop[0]); |
512 |
|
} |
513 |
|
|
514 |
|
|
515 |
< |
static |
516 |
< |
oputn(r) /* print normal */ |
517 |
< |
register RAY *r; |
515 |
> |
static void |
516 |
> |
oputN(r) /* print unperturbed normal */ |
517 |
> |
RAY *r; |
518 |
|
{ |
519 |
|
if (r->rot < FHUGE) { |
520 |
|
(*putreal)(r->ron[0]); |
528 |
|
} |
529 |
|
|
530 |
|
|
531 |
< |
static |
531 |
> |
static void |
532 |
> |
oputn(r) /* print perturbed normal */ |
533 |
> |
RAY *r; |
534 |
> |
{ |
535 |
> |
FVECT pnorm; |
536 |
> |
|
537 |
> |
if (r->rot >= FHUGE) { |
538 |
> |
(*putreal)(0.0); |
539 |
> |
(*putreal)(0.0); |
540 |
> |
(*putreal)(0.0); |
541 |
> |
return; |
542 |
> |
} |
543 |
> |
raynormal(pnorm, r); |
544 |
> |
(*putreal)(pnorm[0]); |
545 |
> |
(*putreal)(pnorm[1]); |
546 |
> |
(*putreal)(pnorm[2]); |
547 |
> |
} |
548 |
> |
|
549 |
> |
|
550 |
> |
static void |
551 |
|
oputs(r) /* print name */ |
552 |
< |
register RAY *r; |
552 |
> |
RAY *r; |
553 |
|
{ |
554 |
|
if (r->ro != NULL) |
555 |
|
fputs(r->ro->oname, stdout); |
559 |
|
} |
560 |
|
|
561 |
|
|
562 |
< |
static |
562 |
> |
static void |
563 |
|
oputw(r) /* print weight */ |
564 |
< |
register RAY *r; |
564 |
> |
RAY *r; |
565 |
|
{ |
566 |
|
(*putreal)(r->rweight); |
567 |
|
} |
568 |
|
|
569 |
|
|
570 |
< |
static |
570 |
> |
static void |
571 |
|
oputm(r) /* print modifier */ |
572 |
< |
register RAY *r; |
572 |
> |
RAY *r; |
573 |
|
{ |
574 |
|
if (r->ro != NULL) |
575 |
< |
fputs(objptr(r->ro->omod)->oname, stdout); |
575 |
> |
if (r->ro->omod != OVOID) |
576 |
> |
fputs(objptr(r->ro->omod)->oname, stdout); |
577 |
> |
else |
578 |
> |
fputs(VOIDID, stdout); |
579 |
|
else |
580 |
|
putchar('*'); |
581 |
|
putchar('\t'); |
582 |
|
} |
583 |
|
|
584 |
|
|
585 |
< |
static |
585 |
> |
static void |
586 |
|
puta(v) /* print ascii value */ |
587 |
|
double v; |
588 |
|
{ |
590 |
|
} |
591 |
|
|
592 |
|
|
593 |
< |
static |
593 |
> |
static void |
594 |
|
putd(v) /* print binary double */ |
595 |
|
double v; |
596 |
|
{ |
597 |
< |
fwrite(&v, sizeof(v), 1, stdout); |
597 |
> |
fwrite((char *)&v, sizeof(v), 1, stdout); |
598 |
|
} |
599 |
|
|
600 |
|
|
601 |
< |
static |
601 |
> |
static void |
602 |
|
putf(v) /* print binary float */ |
603 |
|
double v; |
604 |
|
{ |
605 |
|
float f = v; |
606 |
|
|
607 |
< |
fwrite(&f, sizeof(f), 1, stdout); |
607 |
> |
fwrite((char *)&f, sizeof(f), 1, stdout); |
608 |
|
} |