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#ifndef lint
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static const char RCSid[] = "$Id: bsdf2ttree.c,v 2.63 2025/06/03 21:31:51 greg Exp $";
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#endif
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/*
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| 5 |
* Load measured BSDF interpolant and write out as XML file with tensor tree.
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*
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* G. Ward
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*/
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#define _USE_MATH_DEFINES
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#include <stdlib.h>
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#include <math.h>
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#include <ctype.h>
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#include "random.h"
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#include "rtio.h"
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#include "calcomp.h"
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#include "bsdfrep.h"
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/* reciprocity averaging option */
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static const char *recip = "";
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/* percentage to cull (<0 to turn off) */
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static double pctcull = 90.;
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/* sampling order */
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static int samp_order = 6;
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/* super-sampling threshold */
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static double ssamp_thresh = 0.35;
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/* number of super-samples */
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static int nssamp = 64;
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/* limit on number of RBF lobes */
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static int lobe_lim = 15000;
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/* progress bar length */
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static int do_prog = 79;
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#define MAXCARG 512 /* wrapBSDF command */
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static char *wrapBSDF[MAXCARG] = {"wrapBSDF", "-U"};
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static int wbsdfac = 2;
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/* Add argument to wrapBSDF, allocating space if !isstatic */
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static void
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add_wbsdf(const char *arg, int isstatic)
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{
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| 41 |
if (arg == NULL)
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return;
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| 43 |
if (wbsdfac >= MAXCARG-1) {
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fputs(progname, stderr);
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fputs(": too many command arguments to wrapBSDF\n", stderr);
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exit(1);
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}
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if (!*arg)
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arg = "";
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else if (!isstatic)
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arg = savqstr((char *)arg);
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wrapBSDF[wbsdfac++] = (char *)arg;
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}
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/* Create Yuv component file and add appropriate arguments */
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static char *
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create_component_file(int c)
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{
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static const char sname[3][6] = {"CIE-Y", "CIE-u", "CIE-v"};
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static const char cname[4][4] = {"-rf", "-tf", "-tb", "-rb"};
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char *tfname = mktemp(savqstr(TEMPLATE));
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add_wbsdf("-s", 1); add_wbsdf(sname[c], 1);
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add_wbsdf(cname[(input_orient>0)<<1 | (output_orient>0)], 1);
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add_wbsdf(tfname, 1);
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return(tfname);
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}
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/* Start new progress bar */
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#define prog_start(s) if (do_prog) fprintf(stderr, "%s: %s...\n", progname, s); else
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/* Draw progress bar of the appropriate length */
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static void
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prog_show(double frac)
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{
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static unsigned call_cnt = 0;
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static char lastc[] = "-\\|/";
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char pbar[256];
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int nchars;
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if (do_prog <= 1) return;
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if (do_prog > sizeof(pbar)-2)
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do_prog = sizeof(pbar)-2;
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if (frac < 0) frac = 0;
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else if (frac >= 1) frac = .9999;
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nchars = do_prog*frac;
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pbar[0] = '\r';
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memset(pbar+1, '*', nchars);
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pbar[nchars+1] = lastc[call_cnt++ & 3];
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memset(pbar+2+nchars, '-', do_prog-nchars-1);
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pbar[do_prog+1] = '\0';
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fputs(pbar, stderr);
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}
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/* Finish progress bar */
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static void
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prog_done(void)
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{
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int n = do_prog;
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if (n <= 1) return;
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fputc('\r', stderr);
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while (n--)
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fputc(' ', stderr);
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fputc('\r', stderr);
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}
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/* Compute absolute relative difference */
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static double
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abs_diff(double v1, double v0)
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{
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if ((v0 < 0) | (v1 < 0))
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return(.0);
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v1 = (v1-v0)*2./(v0+v1+.0001);
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if (v1 < 0)
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return(-v1);
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return(v1);
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}
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/* Interpolate and output isotropic BSDF data */
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static void
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eval_isotropic(char *funame)
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{
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| 125 |
const int sqres = 1<<samp_order;
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const double sqfact = 1./(double)sqres;
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float *val_last = NULL;
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| 128 |
float *val_next = NULL;
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SDValue *sdv_next = NULL;
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| 130 |
FILE *ofp, *uvfp[2];
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int assignD = 0;
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char cmd[128];
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int ix, ox, oy;
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RREAL iovec[6];
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float bsdf, uv[2];
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if (pctcull >= 0) {
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sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s",
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recip, pctcull, samp_order, create_component_file(0));
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ofp = popen(cmd, "w");
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if (ofp == NULL) {
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fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
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progname);
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exit(1);
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}
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SET_FILE_BINARY(ofp);
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#ifdef getc_unlocked /* avoid lock/unlock overhead */
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flockfile(ofp);
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#endif
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if (rbf_colorimetry == RBCtristimulus) {
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double uvcull = 100. - (100.-pctcull)*.25;
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sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s",
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recip, uvcull, samp_order, create_component_file(1));
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uvfp[0] = popen(cmd, "w");
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sprintf(cmd, "rttree_reduce%s -h -ff -r 3 -t %f -g %d > %s",
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recip, uvcull, samp_order, create_component_file(2));
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uvfp[1] = popen(cmd, "w");
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if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
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fprintf(stderr, "%s: cannot open pipes to uv output\n",
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progname);
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exit(1);
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}
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SET_FILE_BINARY(uvfp[0]); SET_FILE_BINARY(uvfp[1]);
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#ifdef getc_unlocked
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flockfile(uvfp[0]); flockfile(uvfp[1]);
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#endif
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}
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} else {
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| 169 |
ofp = fopen(create_component_file(0), "w");
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| 170 |
if (ofp == NULL) {
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| 171 |
fprintf(stderr, "%s: cannot create Y output file\n",
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progname);
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exit(1);
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}
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| 175 |
fputs("{\n", ofp);
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| 176 |
if (rbf_colorimetry == RBCtristimulus) {
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uvfp[0] = fopen(create_component_file(1), "w");
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| 178 |
uvfp[1] = fopen(create_component_file(2), "w");
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| 179 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
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| 180 |
fprintf(stderr, "%s: cannot create uv output file(s)\n",
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| 181 |
progname);
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exit(1);
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}
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fputs("{\n", uvfp[0]);
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fputs("{\n", uvfp[1]);
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}
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}
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if (funame != NULL) /* need to assign Dx, Dy, Dz? */
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assignD = (fundefined(funame) < 6);
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| 190 |
val_last = (float *)calloc(sqres, sizeof(float));
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| 191 |
if (funame == NULL)
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| 192 |
sdv_next = (SDValue *)malloc(sizeof(SDValue)*sqres);
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else
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val_next = (float *)malloc(sizeof(float)*sqres);
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/* run through directions */
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| 196 |
for (ix = 0; ix < sqres/2; ix++) {
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const int zipsgn = (ix & 1)*2 - 1;
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RBFNODE *rbf = NULL;
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| 199 |
iovec[0] = 2.*sqfact*(ix+.5) - 1.;
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iovec[1] = zipsgn*sqfact*.5;
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iovec[2] = input_orient * sqrt(1. - iovec[0]*iovec[0]
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| 202 |
- iovec[1]*iovec[1]);
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| 203 |
if (funame == NULL)
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rbf = advect_rbf(iovec, lobe_lim);
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/* presample first row */
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for (oy = 0; oy < sqres; oy++) {
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square2disk(iovec+3, .5*sqfact, (oy+.5)*sqfact);
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iovec[5] = output_orient *
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sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
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if (funame == NULL) {
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eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
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} else {
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if (assignD) {
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varset("Dx", '=', -iovec[3]);
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varset("Dy", '=', -iovec[4]);
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varset("Dz", '=', -iovec[5]);
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++eclock;
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}
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val_next[oy] = funvalue(funame, 6, iovec);
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}
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}
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for (ox = 0; ox < sqres; ox++) {
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/*
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* Super-sample when we detect a difference from before
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* or after in this row, above or below.
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*/
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for (oy = 0; oy < sqres; oy++) {
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if (ox < sqres-1) { /* keeping one row ahead... */
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square2disk(iovec+3, (ox+1.5)*sqfact, (oy+.5)*sqfact);
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iovec[5] = output_orient *
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sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
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}
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if (funame == NULL) {
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SDValue sdv = sdv_next[oy];
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| 235 |
bsdf = sdv.cieY;
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| 236 |
if (ox < sqres-1)
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eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
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| 238 |
if (abs_diff(bsdf, sdv_next[oy].cieY) > ssamp_thresh ||
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(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
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| 240 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
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| 241 |
(oy < sqres-1 &&
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| 242 |
abs_diff(bsdf, sdv_next[oy+1].cieY) > ssamp_thresh)) {
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| 243 |
int ssi;
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| 244 |
double ssa[2], sum = 0, usum = 0, vsum = 0;
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| 245 |
/* super-sample voxel */
|
| 246 |
for (ssi = nssamp; ssi--; ) {
|
| 247 |
SDmultiSamp(ssa, 2, (ssi+frandom()) /
|
| 248 |
(double)nssamp);
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| 249 |
square2disk(iovec+3, (ox+ssa[0])*sqfact,
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| 250 |
(oy+ssa[1])*sqfact);
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| 251 |
iovec[5] = output_orient *
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| 252 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
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| 253 |
eval_rbfcol(&sdv, rbf, iovec+3);
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| 254 |
sum += sdv.cieY;
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| 255 |
if (rbf_colorimetry == RBCtristimulus) {
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| 256 |
sdv.cieY /=
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| 257 |
-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.;
|
| 258 |
usum += 4.*sdv.spec.cx * sdv.cieY;
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| 259 |
vsum += 9.*sdv.spec.cy * sdv.cieY;
|
| 260 |
}
|
| 261 |
}
|
| 262 |
bsdf = sum / (double)nssamp;
|
| 263 |
if (rbf_colorimetry == RBCtristimulus) {
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| 264 |
uv[0] = usum / (sum+FTINY);
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| 265 |
uv[1] = vsum / (sum+FTINY);
|
| 266 |
}
|
| 267 |
} else if (rbf_colorimetry == RBCtristimulus) {
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| 268 |
uv[0] = uv[1] = 1. /
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| 269 |
(-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.);
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| 270 |
uv[0] *= 4.*sdv.spec.cx;
|
| 271 |
uv[1] *= 9.*sdv.spec.cy;
|
| 272 |
}
|
| 273 |
} else {
|
| 274 |
bsdf = val_next[oy];
|
| 275 |
if (ox < sqres-1) {
|
| 276 |
if (assignD) {
|
| 277 |
varset("Dx", '=', -iovec[3]);
|
| 278 |
varset("Dy", '=', -iovec[4]);
|
| 279 |
varset("Dz", '=', -iovec[5]);
|
| 280 |
++eclock;
|
| 281 |
}
|
| 282 |
val_next[oy] = funvalue(funame, 6, iovec);
|
| 283 |
}
|
| 284 |
if (abs_diff(bsdf, val_next[oy]) > ssamp_thresh ||
|
| 285 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
|
| 286 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
|
| 287 |
(oy < sqres-1 &&
|
| 288 |
abs_diff(bsdf, val_next[oy+1]) > ssamp_thresh)) {
|
| 289 |
int ssi;
|
| 290 |
double ssa[4], ssvec[6], sum = 0;
|
| 291 |
/* super-sample voxel */
|
| 292 |
for (ssi = nssamp; ssi--; ) {
|
| 293 |
SDmultiSamp(ssa, 4, (ssi+frandom()) /
|
| 294 |
(double)nssamp);
|
| 295 |
ssvec[0] = 2.*sqfact*(ix+ssa[0]) - 1.;
|
| 296 |
ssvec[1] = zipsgn*sqfact*ssa[1];
|
| 297 |
ssvec[2] = 1. - ssvec[0]*ssvec[0]
|
| 298 |
- ssvec[1]*ssvec[1];
|
| 299 |
if (ssvec[2] < .0) {
|
| 300 |
ssvec[1] = 0;
|
| 301 |
ssvec[2] = 1. - ssvec[0]*ssvec[0];
|
| 302 |
}
|
| 303 |
ssvec[2] = input_orient * sqrt(ssvec[2]);
|
| 304 |
square2disk(ssvec+3, (ox+ssa[2])*sqfact,
|
| 305 |
(oy+ssa[3])*sqfact);
|
| 306 |
ssvec[5] = output_orient *
|
| 307 |
sqrt(1. - ssvec[3]*ssvec[3] -
|
| 308 |
ssvec[4]*ssvec[4]);
|
| 309 |
if (assignD) {
|
| 310 |
varset("Dx", '=', -ssvec[3]);
|
| 311 |
varset("Dy", '=', -ssvec[4]);
|
| 312 |
varset("Dz", '=', -ssvec[5]);
|
| 313 |
++eclock;
|
| 314 |
}
|
| 315 |
sum += funvalue(funame, 6, ssvec);
|
| 316 |
}
|
| 317 |
bsdf = sum / (double)nssamp;
|
| 318 |
}
|
| 319 |
}
|
| 320 |
if (pctcull >= 0)
|
| 321 |
putbinary(&bsdf, sizeof(bsdf), 1, ofp);
|
| 322 |
else
|
| 323 |
fprintf(ofp, "\t%.3e\n", bsdf);
|
| 324 |
|
| 325 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 326 |
if (pctcull >= 0) {
|
| 327 |
putbinary(&uv[0], sizeof(*uv), 1, uvfp[0]);
|
| 328 |
putbinary(&uv[1], sizeof(*uv), 1, uvfp[1]);
|
| 329 |
} else {
|
| 330 |
fprintf(uvfp[0], "\t%.3e\n", uv[0]);
|
| 331 |
fprintf(uvfp[1], "\t%.3e\n", uv[1]);
|
| 332 |
}
|
| 333 |
}
|
| 334 |
if (val_last != NULL)
|
| 335 |
val_last[oy] = bsdf;
|
| 336 |
}
|
| 337 |
}
|
| 338 |
if (rbf != NULL)
|
| 339 |
free(rbf);
|
| 340 |
prog_show((ix+1.)*(2.*sqfact));
|
| 341 |
}
|
| 342 |
prog_done();
|
| 343 |
if (val_last != NULL) {
|
| 344 |
free(val_last);
|
| 345 |
if (val_next != NULL) free(val_next);
|
| 346 |
if (sdv_next != NULL) free(sdv_next);
|
| 347 |
}
|
| 348 |
if (pctcull >= 0) { /* finish output */
|
| 349 |
if (pclose(ofp)) {
|
| 350 |
fprintf(stderr, "%s: error running rttree_reduce on Y\n",
|
| 351 |
progname);
|
| 352 |
exit(1);
|
| 353 |
}
|
| 354 |
if (rbf_colorimetry == RBCtristimulus &&
|
| 355 |
(pclose(uvfp[0]) || pclose(uvfp[1]))) {
|
| 356 |
fprintf(stderr, "%s: error running rttree_reduce on uv\n",
|
| 357 |
progname);
|
| 358 |
exit(1);
|
| 359 |
}
|
| 360 |
} else {
|
| 361 |
for (ix = sqres*sqres*sqres/2; ix--; )
|
| 362 |
fputs("\t0\n", ofp);
|
| 363 |
fputs("}\n", ofp);
|
| 364 |
if (fclose(ofp)) {
|
| 365 |
fprintf(stderr, "%s: error writing Y file\n",
|
| 366 |
progname);
|
| 367 |
exit(1);
|
| 368 |
}
|
| 369 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 370 |
for (ix = sqres*sqres*sqres/2; ix--; ) {
|
| 371 |
fputs("\t0\n", uvfp[0]);
|
| 372 |
fputs("\t0\n", uvfp[1]);
|
| 373 |
}
|
| 374 |
fputs("}\n", uvfp[0]);
|
| 375 |
fputs("}\n", uvfp[1]);
|
| 376 |
if (fclose(uvfp[0]) || fclose(uvfp[1])) {
|
| 377 |
fprintf(stderr, "%s: error writing uv file(s)\n",
|
| 378 |
progname);
|
| 379 |
exit(1);
|
| 380 |
}
|
| 381 |
}
|
| 382 |
}
|
| 383 |
}
|
| 384 |
|
| 385 |
/* Interpolate and output anisotropic BSDF data */
|
| 386 |
static void
|
| 387 |
eval_anisotropic(char *funame)
|
| 388 |
{
|
| 389 |
const int sqres = 1<<samp_order;
|
| 390 |
const double sqfact = 1./(double)sqres;
|
| 391 |
float *val_last = NULL;
|
| 392 |
float *val_next = NULL;
|
| 393 |
SDValue *sdv_next = NULL;
|
| 394 |
FILE *ofp, *uvfp[2];
|
| 395 |
int assignD = 0;
|
| 396 |
char cmd[128];
|
| 397 |
int ix, iy, ox, oy;
|
| 398 |
RREAL iovec[6];
|
| 399 |
float bsdf, uv[2];
|
| 400 |
|
| 401 |
if (pctcull >= 0) {
|
| 402 |
const char *avgopt = (input_orient>0 ^ output_orient>0)
|
| 403 |
? "" : recip;
|
| 404 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s",
|
| 405 |
avgopt, pctcull, samp_order,
|
| 406 |
create_component_file(0));
|
| 407 |
ofp = popen(cmd, "w");
|
| 408 |
if (ofp == NULL) {
|
| 409 |
fprintf(stderr, "%s: cannot create pipe to rttree_reduce\n",
|
| 410 |
progname);
|
| 411 |
exit(1);
|
| 412 |
}
|
| 413 |
SET_FILE_BINARY(ofp);
|
| 414 |
#ifdef getc_unlocked /* avoid lock/unlock overhead */
|
| 415 |
flockfile(ofp);
|
| 416 |
#endif
|
| 417 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 418 |
double uvcull = 100. - (100.-pctcull)*.25;
|
| 419 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s",
|
| 420 |
avgopt, uvcull, samp_order,
|
| 421 |
create_component_file(1));
|
| 422 |
uvfp[0] = popen(cmd, "w");
|
| 423 |
sprintf(cmd, "rttree_reduce%s -h -ff -r 4 -t %f -g %d > %s",
|
| 424 |
avgopt, uvcull, samp_order,
|
| 425 |
create_component_file(2));
|
| 426 |
uvfp[1] = popen(cmd, "w");
|
| 427 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
|
| 428 |
fprintf(stderr, "%s: cannot open pipes to uv output\n",
|
| 429 |
progname);
|
| 430 |
exit(1);
|
| 431 |
}
|
| 432 |
SET_FILE_BINARY(uvfp[0]); SET_FILE_BINARY(uvfp[1]);
|
| 433 |
#ifdef getc_unlocked
|
| 434 |
flockfile(uvfp[0]); flockfile(uvfp[1]);
|
| 435 |
#endif
|
| 436 |
}
|
| 437 |
} else {
|
| 438 |
ofp = fopen(create_component_file(0), "w");
|
| 439 |
if (ofp == NULL) {
|
| 440 |
fprintf(stderr, "%s: cannot create Y output file\n",
|
| 441 |
progname);
|
| 442 |
exit(1);
|
| 443 |
}
|
| 444 |
fputs("{\n", ofp);
|
| 445 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 446 |
uvfp[0] = fopen(create_component_file(1), "w");
|
| 447 |
uvfp[1] = fopen(create_component_file(2), "w");
|
| 448 |
if ((uvfp[0] == NULL) | (uvfp[1] == NULL)) {
|
| 449 |
fprintf(stderr, "%s: cannot create uv output file(s)\n",
|
| 450 |
progname);
|
| 451 |
exit(1);
|
| 452 |
}
|
| 453 |
fputs("{\n", uvfp[0]);
|
| 454 |
fputs("{\n", uvfp[1]);
|
| 455 |
}
|
| 456 |
}
|
| 457 |
if (funame != NULL) /* need to assign Dx, Dy, Dz? */
|
| 458 |
assignD = (fundefined(funame) < 6);
|
| 459 |
val_last = (float *)calloc(sqres, sizeof(float));
|
| 460 |
if (funame == NULL)
|
| 461 |
sdv_next = (SDValue *)malloc(sizeof(SDValue)*sqres);
|
| 462 |
else
|
| 463 |
val_next = (float *)malloc(sizeof(float)*sqres);
|
| 464 |
/* run through directions */
|
| 465 |
for (ix = 0; ix < sqres; ix++)
|
| 466 |
for (iy = 0; iy < sqres; iy++) {
|
| 467 |
RBFNODE *rbf = NULL; /* Klems reversal */
|
| 468 |
square2disk(iovec, 1.-(ix+.5)*sqfact, 1.-(iy+.5)*sqfact);
|
| 469 |
iovec[2] = input_orient *
|
| 470 |
sqrt(1. - iovec[0]*iovec[0] - iovec[1]*iovec[1]);
|
| 471 |
if (funame == NULL)
|
| 472 |
rbf = advect_rbf(iovec, lobe_lim);
|
| 473 |
/* presample first row */
|
| 474 |
for (oy = 0; oy < sqres; oy++) {
|
| 475 |
square2disk(iovec+3, .5*sqfact, (oy+.5)*sqfact);
|
| 476 |
iovec[5] = output_orient *
|
| 477 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
|
| 478 |
if (funame == NULL) {
|
| 479 |
eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
|
| 480 |
} else {
|
| 481 |
if (assignD) {
|
| 482 |
varset("Dx", '=', -iovec[3]);
|
| 483 |
varset("Dy", '=', -iovec[4]);
|
| 484 |
varset("Dz", '=', -iovec[5]);
|
| 485 |
++eclock;
|
| 486 |
}
|
| 487 |
val_next[oy] = funvalue(funame, 6, iovec);
|
| 488 |
}
|
| 489 |
}
|
| 490 |
for (ox = 0; ox < sqres; ox++) {
|
| 491 |
/*
|
| 492 |
* Super-sample when we detect a difference from before
|
| 493 |
* or after in this row, above or below.
|
| 494 |
*/
|
| 495 |
for (oy = 0; oy < sqres; oy++) {
|
| 496 |
if (ox < sqres-1) { /* keeping one row ahead... */
|
| 497 |
square2disk(iovec+3, (ox+1.5)*sqfact, (oy+.5)*sqfact);
|
| 498 |
iovec[5] = output_orient *
|
| 499 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
|
| 500 |
}
|
| 501 |
if (funame == NULL) {
|
| 502 |
SDValue sdv = sdv_next[oy];
|
| 503 |
bsdf = sdv.cieY;
|
| 504 |
if (ox < sqres-1)
|
| 505 |
eval_rbfcol(&sdv_next[oy], rbf, iovec+3);
|
| 506 |
if (abs_diff(bsdf, sdv_next[oy].cieY) > ssamp_thresh ||
|
| 507 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
|
| 508 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
|
| 509 |
(oy < sqres-1 &&
|
| 510 |
abs_diff(bsdf, sdv_next[oy+1].cieY) > ssamp_thresh)) {
|
| 511 |
int ssi;
|
| 512 |
double ssa[2], sum = 0, usum = 0, vsum = 0;
|
| 513 |
/* super-sample voxel */
|
| 514 |
for (ssi = nssamp; ssi--; ) {
|
| 515 |
SDmultiSamp(ssa, 2, (ssi+frandom()) /
|
| 516 |
(double)nssamp);
|
| 517 |
square2disk(iovec+3, (ox+ssa[0])*sqfact,
|
| 518 |
(oy+ssa[1])*sqfact);
|
| 519 |
iovec[5] = output_orient *
|
| 520 |
sqrt(1. - iovec[3]*iovec[3] - iovec[4]*iovec[4]);
|
| 521 |
eval_rbfcol(&sdv, rbf, iovec+3);
|
| 522 |
sum += sdv.cieY;
|
| 523 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 524 |
sdv.cieY /=
|
| 525 |
-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.;
|
| 526 |
usum += 4.*sdv.spec.cx * sdv.cieY;
|
| 527 |
vsum += 9.*sdv.spec.cy * sdv.cieY;
|
| 528 |
}
|
| 529 |
}
|
| 530 |
bsdf = sum / (double)nssamp;
|
| 531 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 532 |
uv[0] = usum / (sum+FTINY);
|
| 533 |
uv[1] = vsum / (sum+FTINY);
|
| 534 |
}
|
| 535 |
} else if (rbf_colorimetry == RBCtristimulus) {
|
| 536 |
uv[0] = uv[1] = 1. /
|
| 537 |
(-2.*sdv.spec.cx + 12.*sdv.spec.cy + 3.);
|
| 538 |
uv[0] *= 4.*sdv.spec.cx;
|
| 539 |
uv[1] *= 9.*sdv.spec.cy;
|
| 540 |
}
|
| 541 |
} else {
|
| 542 |
bsdf = val_next[oy];
|
| 543 |
if (ox < sqres-1) {
|
| 544 |
if (assignD) {
|
| 545 |
varset("Dx", '=', -iovec[3]);
|
| 546 |
varset("Dy", '=', -iovec[4]);
|
| 547 |
varset("Dz", '=', -iovec[5]);
|
| 548 |
++eclock;
|
| 549 |
}
|
| 550 |
val_next[oy] = funvalue(funame, 6, iovec);
|
| 551 |
}
|
| 552 |
if (abs_diff(bsdf, val_next[oy]) > ssamp_thresh ||
|
| 553 |
(ox && abs_diff(bsdf, val_last[oy]) > ssamp_thresh) ||
|
| 554 |
(oy && abs_diff(bsdf, val_last[oy-1]) > ssamp_thresh) ||
|
| 555 |
(oy < sqres-1 &&
|
| 556 |
abs_diff(bsdf, val_next[oy+1]) > ssamp_thresh)) {
|
| 557 |
int ssi;
|
| 558 |
double ssa[4], ssvec[6], sum = 0;
|
| 559 |
/* super-sample voxel */
|
| 560 |
for (ssi = nssamp; ssi--; ) {
|
| 561 |
SDmultiSamp(ssa, 4, (ssi+frandom()) /
|
| 562 |
(double)nssamp);
|
| 563 |
square2disk(ssvec, 1.-(ix+ssa[0])*sqfact,
|
| 564 |
1.-(iy+ssa[1])*sqfact);
|
| 565 |
ssvec[2] = input_orient *
|
| 566 |
sqrt(1. - ssvec[0]*ssvec[0] -
|
| 567 |
ssvec[1]*ssvec[1]);
|
| 568 |
square2disk(ssvec+3, (ox+ssa[2])*sqfact,
|
| 569 |
(oy+ssa[3])*sqfact);
|
| 570 |
ssvec[5] = output_orient *
|
| 571 |
sqrt(1. - ssvec[3]*ssvec[3] -
|
| 572 |
ssvec[4]*ssvec[4]);
|
| 573 |
if (assignD) {
|
| 574 |
varset("Dx", '=', -ssvec[3]);
|
| 575 |
varset("Dy", '=', -ssvec[4]);
|
| 576 |
varset("Dz", '=', -ssvec[5]);
|
| 577 |
++eclock;
|
| 578 |
}
|
| 579 |
sum += funvalue(funame, 6, ssvec);
|
| 580 |
}
|
| 581 |
bsdf = sum / (double)nssamp;
|
| 582 |
}
|
| 583 |
}
|
| 584 |
if (pctcull >= 0)
|
| 585 |
putbinary(&bsdf, sizeof(bsdf), 1, ofp);
|
| 586 |
else
|
| 587 |
fprintf(ofp, "\t%.3e\n", bsdf);
|
| 588 |
|
| 589 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 590 |
if (pctcull >= 0) {
|
| 591 |
putbinary(&uv[0], sizeof(*uv), 1, uvfp[0]);
|
| 592 |
putbinary(&uv[1], sizeof(*uv), 1, uvfp[1]);
|
| 593 |
} else {
|
| 594 |
fprintf(uvfp[0], "\t%.3e\n", uv[0]);
|
| 595 |
fprintf(uvfp[1], "\t%.3e\n", uv[1]);
|
| 596 |
}
|
| 597 |
}
|
| 598 |
if (val_last != NULL)
|
| 599 |
val_last[oy] = bsdf;
|
| 600 |
}
|
| 601 |
}
|
| 602 |
if (rbf != NULL)
|
| 603 |
free(rbf);
|
| 604 |
prog_show((ix*sqres+iy+1.)/(sqres*sqres));
|
| 605 |
}
|
| 606 |
prog_done();
|
| 607 |
if (val_last != NULL) {
|
| 608 |
free(val_last);
|
| 609 |
if (val_next != NULL) free(val_next);
|
| 610 |
if (sdv_next != NULL) free(sdv_next);
|
| 611 |
}
|
| 612 |
if (pctcull >= 0) { /* finish output */
|
| 613 |
if (pclose(ofp)) {
|
| 614 |
fprintf(stderr, "%s: error running rttree_reduce on Y\n",
|
| 615 |
progname);
|
| 616 |
exit(1);
|
| 617 |
}
|
| 618 |
if (rbf_colorimetry == RBCtristimulus &&
|
| 619 |
(pclose(uvfp[0]) || pclose(uvfp[1]))) {
|
| 620 |
fprintf(stderr, "%s: error running rttree_reduce on uv\n",
|
| 621 |
progname);
|
| 622 |
exit(1);
|
| 623 |
}
|
| 624 |
} else {
|
| 625 |
fputs("}\n", ofp);
|
| 626 |
if (fclose(ofp)) {
|
| 627 |
fprintf(stderr, "%s: error writing Y file\n",
|
| 628 |
progname);
|
| 629 |
exit(1);
|
| 630 |
}
|
| 631 |
if (rbf_colorimetry == RBCtristimulus) {
|
| 632 |
fputs("}\n", uvfp[0]);
|
| 633 |
fputs("}\n", uvfp[1]);
|
| 634 |
if (fclose(uvfp[0]) || fclose(uvfp[1])) {
|
| 635 |
fprintf(stderr, "%s: error writing uv file(s)\n",
|
| 636 |
progname);
|
| 637 |
exit(1);
|
| 638 |
}
|
| 639 |
}
|
| 640 |
}
|
| 641 |
}
|
| 642 |
|
| 643 |
#if defined(_WIN32) || defined(_WIN64)
|
| 644 |
/* Execute wrapBSDF command (may never return) */
|
| 645 |
static int
|
| 646 |
wrap_up(void)
|
| 647 |
{
|
| 648 |
char cmd[32700];
|
| 649 |
|
| 650 |
if (bsdf_manuf[0]) {
|
| 651 |
add_wbsdf("-f", 1);
|
| 652 |
strcpy(cmd, "m=");
|
| 653 |
strcpy(cmd+2, bsdf_manuf);
|
| 654 |
add_wbsdf(cmd, 0);
|
| 655 |
}
|
| 656 |
if (bsdf_name[0]) {
|
| 657 |
add_wbsdf("-f", 1);
|
| 658 |
strcpy(cmd, "n=");
|
| 659 |
strcpy(cmd+2, bsdf_name);
|
| 660 |
add_wbsdf(cmd, 0);
|
| 661 |
}
|
| 662 |
if (!convert_commandline(cmd, sizeof(cmd), wrapBSDF)) {
|
| 663 |
fputs(progname, stderr);
|
| 664 |
fputs(": command line too long in wrap_up()\n", stderr);
|
| 665 |
return(1);
|
| 666 |
}
|
| 667 |
return(system(cmd));
|
| 668 |
}
|
| 669 |
#else
|
| 670 |
/* Execute wrapBSDF command (may never return) */
|
| 671 |
static int
|
| 672 |
wrap_up(void)
|
| 673 |
{
|
| 674 |
char buf[256];
|
| 675 |
char *compath = getpath((char *)wrapBSDF[0], getenv("PATH"), X_OK);
|
| 676 |
|
| 677 |
if (compath == NULL) {
|
| 678 |
fprintf(stderr, "%s: cannot locate %s\n", progname, wrapBSDF[0]);
|
| 679 |
return(1);
|
| 680 |
}
|
| 681 |
if (bsdf_manuf[0]) {
|
| 682 |
add_wbsdf("-f", 1);
|
| 683 |
strcpy(buf, "m=");
|
| 684 |
strcpy(buf+2, bsdf_manuf);
|
| 685 |
add_wbsdf(buf, 0);
|
| 686 |
}
|
| 687 |
if (bsdf_name[0]) {
|
| 688 |
add_wbsdf("-f", 1);
|
| 689 |
strcpy(buf, "n=");
|
| 690 |
strcpy(buf+2, bsdf_name);
|
| 691 |
add_wbsdf(buf, 0);
|
| 692 |
}
|
| 693 |
execv(compath, wrapBSDF); /* successful call never returns */
|
| 694 |
perror(compath);
|
| 695 |
return(1);
|
| 696 |
}
|
| 697 |
#endif
|
| 698 |
|
| 699 |
#define HEAD_BUFLEN 10240
|
| 700 |
static char head_buf[HEAD_BUFLEN];
|
| 701 |
static int cur_headlen = 0;
|
| 702 |
|
| 703 |
/* Record header line as comment associated with this SIR input */
|
| 704 |
static int
|
| 705 |
record2header(char *s)
|
| 706 |
{
|
| 707 |
int len = strlen(s);
|
| 708 |
|
| 709 |
if (cur_headlen+len >= HEAD_BUFLEN-6)
|
| 710 |
return(0);
|
| 711 |
/* includes EOL */
|
| 712 |
strcpy(head_buf+cur_headlen, s);
|
| 713 |
cur_headlen += len;
|
| 714 |
|
| 715 |
#if defined(_WIN32) || defined(_WIN64)
|
| 716 |
if (head_buf[cur_headlen-1] == '\n')
|
| 717 |
head_buf[cur_headlen-1] = '\t';
|
| 718 |
#endif
|
| 719 |
return(1);
|
| 720 |
}
|
| 721 |
|
| 722 |
/* Finish off header for this file */
|
| 723 |
static void
|
| 724 |
done_header(void)
|
| 725 |
{
|
| 726 |
while (cur_headlen > 0 && isspace(head_buf[cur_headlen-1]))
|
| 727 |
--cur_headlen;
|
| 728 |
head_buf[cur_headlen] = '\0';
|
| 729 |
if (!cur_headlen)
|
| 730 |
return;
|
| 731 |
add_wbsdf("-C", 1);
|
| 732 |
add_wbsdf(head_buf, 0);
|
| 733 |
head_buf[cur_headlen=0] = '\0';
|
| 734 |
}
|
| 735 |
|
| 736 |
/* Read in BSDF and interpolate as tensor tree representation */
|
| 737 |
int
|
| 738 |
main(int argc, char *argv[])
|
| 739 |
{
|
| 740 |
static const char tfmt[2][4] = {"t4", "t3"};
|
| 741 |
int dofwd = 0, dobwd = 1;
|
| 742 |
int nsirs = 0;
|
| 743 |
char buf[1024];
|
| 744 |
int i;
|
| 745 |
/* set global progname */
|
| 746 |
fixargv0(argv[0]);
|
| 747 |
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST;
|
| 748 |
esupport &= ~(E_INCHAN|E_OUTCHAN);
|
| 749 |
scompile("PI:3.14159265358979323846", NULL, 0);
|
| 750 |
biggerlib();
|
| 751 |
strcpy(buf, "File produced by: ");
|
| 752 |
if (convert_commandline(buf+18, sizeof(buf)-18, argv) != NULL) {
|
| 753 |
add_wbsdf("-C", 1); add_wbsdf(buf, 0);
|
| 754 |
}
|
| 755 |
for (i = 1; i < argc; i++)
|
| 756 |
if ((argv[i][0] == '-') | (argv[i][0] == '+')) {
|
| 757 |
switch (argv[i][1]) { /* get option */
|
| 758 |
case 'e':
|
| 759 |
scompile(argv[++i], NULL, 0);
|
| 760 |
if (single_plane_incident < 0)
|
| 761 |
single_plane_incident = 0;
|
| 762 |
break;
|
| 763 |
case 'f':
|
| 764 |
if ((argv[i][0] == '-') & !argv[i][2]) {
|
| 765 |
if (strchr(argv[++i], '=') != NULL) {
|
| 766 |
add_wbsdf("-f", 1);
|
| 767 |
add_wbsdf(argv[i], 1);
|
| 768 |
} else {
|
| 769 |
char *fpath = getpath(argv[i],
|
| 770 |
getrlibpath(), 0);
|
| 771 |
if (fpath == NULL) {
|
| 772 |
fprintf(stderr,
|
| 773 |
"%s: cannot find file '%s'\n",
|
| 774 |
argv[0], argv[i]);
|
| 775 |
return(1);
|
| 776 |
}
|
| 777 |
fcompile(fpath);
|
| 778 |
if (single_plane_incident < 0)
|
| 779 |
single_plane_incident = 0;
|
| 780 |
}
|
| 781 |
} else
|
| 782 |
dofwd = (argv[i][0] == '+');
|
| 783 |
break;
|
| 784 |
case 'a':
|
| 785 |
recip = (argv[i][0] == '+') ? " -a" : "";
|
| 786 |
break;
|
| 787 |
case 'b':
|
| 788 |
dobwd = (argv[i][0] == '+');
|
| 789 |
break;
|
| 790 |
case 'n':
|
| 791 |
nssamp = atoi(argv[++i]);
|
| 792 |
if (nssamp <= 0)
|
| 793 |
goto userr;
|
| 794 |
break;
|
| 795 |
case 's':
|
| 796 |
ssamp_thresh = atof(argv[++i]);
|
| 797 |
if (ssamp_thresh <= FTINY)
|
| 798 |
goto userr;
|
| 799 |
break;
|
| 800 |
case 't':
|
| 801 |
switch (argv[i][2]) {
|
| 802 |
case '3':
|
| 803 |
single_plane_incident = 1;
|
| 804 |
break;
|
| 805 |
case '4':
|
| 806 |
single_plane_incident = 0;
|
| 807 |
break;
|
| 808 |
case '\0':
|
| 809 |
pctcull = atof(argv[++i]);
|
| 810 |
break;
|
| 811 |
default:
|
| 812 |
goto userr;
|
| 813 |
}
|
| 814 |
break;
|
| 815 |
case 'g':
|
| 816 |
samp_order = atoi(argv[++i]);
|
| 817 |
break;
|
| 818 |
case 'l':
|
| 819 |
lobe_lim = atoi(argv[++i]);
|
| 820 |
break;
|
| 821 |
case 'p':
|
| 822 |
do_prog = atoi(argv[i]+2);
|
| 823 |
break;
|
| 824 |
case 'W':
|
| 825 |
add_wbsdf(argv[i], 1);
|
| 826 |
break;
|
| 827 |
case 'u':
|
| 828 |
case 'C':
|
| 829 |
add_wbsdf(argv[i], 1);
|
| 830 |
add_wbsdf(argv[++i], 1);
|
| 831 |
break;
|
| 832 |
default:
|
| 833 |
goto userr;
|
| 834 |
}
|
| 835 |
} else { /* input SIR or function */
|
| 836 |
FILE *fpin;
|
| 837 |
if (!nsirs & (single_plane_incident >= 0))
|
| 838 |
break; /* must be a function */
|
| 839 |
if (nsirs >= 4) {
|
| 840 |
fprintf(stderr, "At most 4 SIR inputs supported\n");
|
| 841 |
goto userr;
|
| 842 |
}
|
| 843 |
fpin = fopen(argv[i], "rb"); /* open SIR file */
|
| 844 |
if (fpin == NULL) {
|
| 845 |
fprintf(stderr, "%s: cannot open BSDF interpolant '%s'\n",
|
| 846 |
progname, argv[i]);
|
| 847 |
return(1);
|
| 848 |
}
|
| 849 |
sprintf(buf, "%s:\n", argv[i]);
|
| 850 |
record2header(buf);
|
| 851 |
sir_headshare = &record2header;
|
| 852 |
if (!load_bsdf_rep(fpin))
|
| 853 |
return(1);
|
| 854 |
fclose(fpin);
|
| 855 |
done_header();
|
| 856 |
sprintf(buf, "Interpolating component '%s'", argv[i]);
|
| 857 |
prog_start(buf);
|
| 858 |
if (!nsirs++) {
|
| 859 |
add_wbsdf("-a", 1);
|
| 860 |
add_wbsdf(tfmt[single_plane_incident], 1);
|
| 861 |
}
|
| 862 |
if (single_plane_incident)
|
| 863 |
eval_isotropic(NULL);
|
| 864 |
else
|
| 865 |
eval_anisotropic(NULL);
|
| 866 |
}
|
| 867 |
if (i < argc) { /* function-based BSDF? */
|
| 868 |
void (*evf)(char *s) = single_plane_incident ?
|
| 869 |
eval_isotropic : eval_anisotropic;
|
| 870 |
if (i != argc-1 || fundefined(argv[i]) < 3) {
|
| 871 |
fprintf(stderr,
|
| 872 |
"%s: need single function with 6 arguments: bsdf(ix,iy,iz,ox,oy,oz)\n",
|
| 873 |
progname);
|
| 874 |
fprintf(stderr, "\tor 3 arguments using Dx,Dy,Dz: bsdf(ix,iy,iz)\n");
|
| 875 |
goto userr;
|
| 876 |
}
|
| 877 |
doptimize(1); /* optimize definitions */
|
| 878 |
++eclock;
|
| 879 |
add_wbsdf("-a", 1);
|
| 880 |
add_wbsdf(tfmt[single_plane_incident], 1);
|
| 881 |
if (dofwd) {
|
| 882 |
input_orient = -1;
|
| 883 |
output_orient = -1;
|
| 884 |
prog_start("Evaluating outside reflectance");
|
| 885 |
(*evf)(argv[i]);
|
| 886 |
output_orient = 1;
|
| 887 |
prog_start("Evaluating outside->inside transmission");
|
| 888 |
(*evf)(argv[i]);
|
| 889 |
}
|
| 890 |
if (dobwd) {
|
| 891 |
input_orient = 1;
|
| 892 |
output_orient = 1;
|
| 893 |
prog_start("Evaluating inside reflectance");
|
| 894 |
(*evf)(argv[i]);
|
| 895 |
output_orient = -1;
|
| 896 |
prog_start("Evaluating inside->outside transmission");
|
| 897 |
(*evf)(argv[i]);
|
| 898 |
}
|
| 899 |
} else if (!nsirs) { /* else load SIR from stdin? */
|
| 900 |
record2header("<stdin>:\n");
|
| 901 |
sir_headshare = &record2header;
|
| 902 |
if (!load_bsdf_rep(stdin))
|
| 903 |
return(1);
|
| 904 |
done_header();
|
| 905 |
prog_start("Interpolating from standard input");
|
| 906 |
add_wbsdf("-a", 1);
|
| 907 |
add_wbsdf(tfmt[single_plane_incident], 1);
|
| 908 |
if (single_plane_incident) /* resample dist. */
|
| 909 |
eval_isotropic(NULL);
|
| 910 |
else
|
| 911 |
eval_anisotropic(NULL);
|
| 912 |
}
|
| 913 |
return(wrap_up()); /* call wrapBSDF */
|
| 914 |
userr:
|
| 915 |
fprintf(stderr,
|
| 916 |
"Usage: %s [{+|-}a][-g Nlog2][-t pctcull][-n nss][-s thresh][-l maxlobes][bsdf.sir ..] > bsdf.xml\n",
|
| 917 |
progname);
|
| 918 |
fprintf(stderr,
|
| 919 |
" or: %s -t{3|4} [{+|-}a][-g Nlog2][-t pctcull][-n nss][-s thresh][{+|-}for[ward]][{+|-}b[ackward]][-e expr][-f file] bsdf_func > bsdf.xml\n",
|
| 920 |
progname);
|
| 921 |
return(1);
|
| 922 |
}
|
