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/* Copyright (c) 1986 Regents of the University of California */ |
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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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|
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/* |
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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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|
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#include "octree.h" |
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|
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#include "otypes.h" |
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|
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#include "resolu.h" |
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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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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 = .05; /* shadow threshold */ |
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double shadcert = .5; /* 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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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 = 6; /* maximum recursion depth */ |
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double minweight = 4e-3; /* minimum ray weight */ |
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|
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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int ambvwt = 0; /* initial weight for ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
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int ambres = 32; /* ambient resolution */ |
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int ambdiv = 128; /* ambient divisions */ |
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int ambres = 128; /* ambient resolution */ |
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int ambdiv = 512; /* 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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|
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extern OBJREC Lamb; /* a Lambertian surface */ |
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extern OBJREC Aftplane; /* aft clipping object */ |
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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 int oputo(), oputd(), oputv(), oputl(), oputL(), |
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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 int ourtrace(), tabin(); |
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static int (*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 int puta(), putf(), putd(); |
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|
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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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#ifndef NIX |
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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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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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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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sprintf(errmsg, "cannot open input file \"%s\"", fname); |
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error(SYSTEM, errmsg); |
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} |
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#ifdef MSDOS |
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if (inform != 'a') |
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setmode(fileno(fp), O_BINARY); |
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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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} |
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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) { /* zero ==> flush */ |
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fflush(stdout); |
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continue; |
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} |
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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) { |
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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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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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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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extern int (*trace)(); |
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register int (**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 '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; |
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case 'n': /* normal */ |
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case 'n': /* perturbed normal */ |
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*table++ = oputn; |
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castonly = 0; |
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break; |
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case 'N': /* unperturbed 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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} |
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|
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radiance(org, dir) /* compute radiance value */ |
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FVECT org, dir; |
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bogusray() /* print out empty record */ |
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{ |
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register int (**tp)(); |
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thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] = |
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thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0; |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
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printvals(&thisray); |
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} |
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|
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|
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rad(org, dir, dmax) /* compute and print ray value(s) */ |
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FVECT org, dir; |
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double dmax; |
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{ |
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VCOPY(thisray.rorg, org); |
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VCOPY(thisray.rdir, dir); |
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thisray.rmax = dmax; |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
275 |
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rayvalue(&thisray); |
276 |
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|
277 |
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if (ray_out[0] == NULL) |
278 |
< |
return; |
279 |
< |
for (tp = ray_out; *tp != NULL; tp++) |
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< |
(**tp)(&thisray); |
281 |
< |
if (outform == 'a') |
282 |
< |
putchar('\n'); |
275 |
> |
if (castonly) { |
276 |
> |
if (!localhit(&thisray, &thescene)) |
277 |
> |
if (thisray.ro == &Aftplane) { /* clipped */ |
278 |
> |
thisray.ro = NULL; |
279 |
> |
thisray.rot = FHUGE; |
280 |
> |
} else |
281 |
> |
sourcehit(&thisray); |
282 |
> |
} else |
283 |
> |
rayvalue(&thisray); |
284 |
> |
printvals(&thisray); |
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} |
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|
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|
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< |
irrad(org, dir) /* compute irradiance value */ |
288 |
> |
irrad(org, dir) /* compute immediate irradiance value */ |
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FVECT org, dir; |
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{ |
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static double Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
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static OBJREC Lamb = { |
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OVOID, MAT_PLASTIC, "Lambertian", |
193 |
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{0, 5, NULL, Lambfa}, NULL, -1, |
194 |
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}; |
291 |
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register int i; |
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|
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for (i = 0; i < 3; i++) { |
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} |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
298 |
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/* pretend we hit surface */ |
299 |
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thisray.rot = 1.0; |
299 |
> |
thisray.rot = 1.0-1e-4; |
300 |
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thisray.rod = 1.0; |
301 |
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VCOPY(thisray.ron, dir); |
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for (i = 0; i < 3; i++) /* fudge factor */ |
303 |
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thisray.rop[i] = org[i] + 1e-4*dir[i]; |
304 |
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/* compute and print */ |
305 |
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
306 |
< |
oputv(&thisray); |
306 |
> |
printvals(&thisray); |
307 |
> |
} |
308 |
> |
|
309 |
> |
|
310 |
> |
printvals(r) /* print requested ray values */ |
311 |
> |
RAY *r; |
312 |
> |
{ |
313 |
> |
register int (**tp)(); |
314 |
> |
|
315 |
> |
if (ray_out[0] == NULL) |
316 |
> |
return; |
317 |
> |
for (tp = ray_out; *tp != NULL; tp++) |
318 |
> |
(**tp)(r); |
319 |
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if (outform == 'a') |
320 |
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putchar('\n'); |
321 |
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} |
326 |
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int fmt; |
327 |
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FILE *fp; |
328 |
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{ |
329 |
+ |
extern char *fgetword(); |
330 |
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static float vf[3]; |
331 |
+ |
static double vd[3]; |
332 |
+ |
char buf[32]; |
333 |
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register int i; |
334 |
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|
335 |
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switch (fmt) { |
336 |
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case 'a': /* ascii */ |
337 |
< |
if (fscanf(fp, "%lf %lf %lf", vec, vec+1, vec+2) != 3) |
338 |
< |
return(-1); |
337 |
> |
for (i = 0; i < 3; i++) { |
338 |
> |
if (fgetword(buf, sizeof(buf), fp) == NULL || |
339 |
> |
!isflt(buf)) |
340 |
> |
return(-1); |
341 |
> |
vec[i] = atof(buf); |
342 |
> |
} |
343 |
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break; |
344 |
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case 'f': /* binary float */ |
345 |
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if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
347 |
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vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2]; |
348 |
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break; |
349 |
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case 'd': /* binary double */ |
350 |
< |
if (fread((char *)vec, sizeof(double), 3, fp) != 3) |
350 |
> |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
351 |
|
return(-1); |
352 |
+ |
vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2]; |
353 |
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break; |
354 |
+ |
default: |
355 |
+ |
error(CONSISTENCY, "botched input format"); |
356 |
|
} |
357 |
|
return(0); |
358 |
|
} |
359 |
|
|
360 |
|
|
361 |
+ |
tranotify(obj) /* record new modifier */ |
362 |
+ |
OBJECT obj; |
363 |
+ |
{ |
364 |
+ |
static int hitlimit = 0; |
365 |
+ |
register OBJREC *o = objptr(obj); |
366 |
+ |
register char **tralp; |
367 |
+ |
|
368 |
+ |
if (hitlimit || !ismodifier(o->otype)) |
369 |
+ |
return; |
370 |
+ |
for (tralp = tralist; *tralp != NULL; tralp++) |
371 |
+ |
if (!strcmp(o->oname, *tralp)) { |
372 |
+ |
if (traset[0] >= MAXTSET) { |
373 |
+ |
error(WARNING, "too many modifiers in trace list"); |
374 |
+ |
hitlimit++; |
375 |
+ |
return; /* should this be fatal? */ |
376 |
+ |
} |
377 |
+ |
insertelem(traset, obj); |
378 |
+ |
return; |
379 |
+ |
} |
380 |
+ |
} |
381 |
+ |
|
382 |
+ |
|
383 |
|
static |
384 |
|
ourtrace(r) /* print ray values */ |
385 |
|
RAY *r; |
388 |
|
|
389 |
|
if (every_out[0] == NULL) |
390 |
|
return; |
391 |
+ |
if (r->ro == NULL) { |
392 |
+ |
if (traincl == 1) |
393 |
+ |
return; |
394 |
+ |
} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
395 |
+ |
return; |
396 |
|
tabin(r); |
397 |
|
for (tp = every_out; *tp != NULL; tp++) |
398 |
|
(**tp)(r); |
435 |
|
oputv(r) /* print value */ |
436 |
|
register RAY *r; |
437 |
|
{ |
438 |
+ |
COLR cout; |
439 |
+ |
|
440 |
+ |
if (outform == 'c') { |
441 |
+ |
setcolr(cout, colval(r->rcol,RED), |
442 |
+ |
colval(r->rcol,GRN), |
443 |
+ |
colval(r->rcol,BLU)); |
444 |
+ |
fwrite((char *)cout, sizeof(cout), 1, stdout); |
445 |
+ |
return; |
446 |
+ |
} |
447 |
|
(*putreal)(colval(r->rcol,RED)); |
448 |
|
(*putreal)(colval(r->rcol,GRN)); |
449 |
|
(*putreal)(colval(r->rcol,BLU)); |
451 |
|
|
452 |
|
|
453 |
|
static |
454 |
< |
oputl(r) /* print length */ |
454 |
> |
oputl(r) /* print effective distance */ |
455 |
|
register RAY *r; |
456 |
|
{ |
457 |
|
(*putreal)(r->rt); |
459 |
|
|
460 |
|
|
461 |
|
static |
462 |
+ |
oputL(r) /* print single ray length */ |
463 |
+ |
register RAY *r; |
464 |
+ |
{ |
465 |
+ |
(*putreal)(r->rot); |
466 |
+ |
} |
467 |
+ |
|
468 |
+ |
|
469 |
+ |
static |
470 |
|
oputp(r) /* print point */ |
471 |
|
register RAY *r; |
472 |
|
{ |
483 |
|
|
484 |
|
|
485 |
|
static |
486 |
< |
oputn(r) /* print normal */ |
486 |
> |
oputN(r) /* print unperturbed normal */ |
487 |
|
register RAY *r; |
488 |
|
{ |
489 |
|
if (r->rot < FHUGE) { |
499 |
|
|
500 |
|
|
501 |
|
static |
502 |
+ |
oputn(r) /* print perturbed normal */ |
503 |
+ |
RAY *r; |
504 |
+ |
{ |
505 |
+ |
FVECT pnorm; |
506 |
+ |
|
507 |
+ |
if (r->rot >= FHUGE) { |
508 |
+ |
(*putreal)(0.0); |
509 |
+ |
(*putreal)(0.0); |
510 |
+ |
(*putreal)(0.0); |
511 |
+ |
return; |
512 |
+ |
} |
513 |
+ |
raynormal(pnorm, r); |
514 |
+ |
(*putreal)(pnorm[0]); |
515 |
+ |
(*putreal)(pnorm[1]); |
516 |
+ |
(*putreal)(pnorm[2]); |
517 |
+ |
} |
518 |
+ |
|
519 |
+ |
|
520 |
+ |
static |
521 |
|
oputs(r) /* print name */ |
522 |
|
register RAY *r; |
523 |
|
{ |
542 |
|
register RAY *r; |
543 |
|
{ |
544 |
|
if (r->ro != NULL) |
545 |
< |
fputs(objptr(r->ro->omod)->oname, stdout); |
545 |
> |
if (r->ro->omod != OVOID) |
546 |
> |
fputs(objptr(r->ro->omod)->oname, stdout); |
547 |
> |
else |
548 |
> |
fputs(VOIDID, stdout); |
549 |
|
else |
550 |
|
putchar('*'); |
551 |
|
putchar('\t'); |