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#ifndef lint |
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static const char RCSid[] = "$Id: pkgBSDF.c,v 2.9 2024/12/08 18:33:23 greg Exp $"; |
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#endif |
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/* |
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* Take BSDF XML file and generate a referencing Radiance object |
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*/ |
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|
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#include "rtio.h" |
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#include "paths.h" |
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#include "bsdf.h" |
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|
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int do_stdout = 0; /* send Radiance object to stdout? */ |
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int do_instance = 0; /* produce instance/octree pairs? */ |
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|
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/* Return appropriate suffix for Z offset */ |
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static const char * |
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get_suffix(double zval) |
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{ |
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return((zval > FTINY) ? "_f" : (zval < -FTINY) ? "_b" : ""); |
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} |
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|
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|
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/* Produce a single rectangle corresponding to the given BSDF dimensions */ |
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static void |
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faceBSDF(const SDData *bsp, double zval) |
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{ |
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const char *sfx = get_suffix(zval); |
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/* output material */ |
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printf("void BSDF m_%s%s\n", bsp->name, sfx); |
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printf("6 %g %s.xml 0 1 0 .\n", zval*1.00004, bsp->name); |
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printf("0\n0\n\n"); |
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/* output surface */ |
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zval *= (zval < 0) + 0.00002; |
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printf("m_%s%s polygon %s%s\n", bsp->name, sfx, bsp->name, sfx); |
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printf("0\n0\n12\n"); |
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printf("\t%.6e\t%.6e\t%.6e\n", |
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-.5*bsp->dim[0], -.5*bsp->dim[1], zval); |
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printf("\t%.6e\t%.6e\t%.6e\n", |
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.5*bsp->dim[0], -.5*bsp->dim[1], zval); |
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printf("\t%.6e\t%.6e\t%.6e\n", |
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.5*bsp->dim[0], .5*bsp->dim[1], zval); |
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printf("\t%.6e\t%.6e\t%.6e\n\n", |
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-.5*bsp->dim[0], .5*bsp->dim[1], zval); |
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} |
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|
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|
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/* Convert BSDF (MGF) geometry to Radiance description */ |
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static int |
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geomBSDF(const SDData *bsp) |
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{ |
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char tmpfile[64]; |
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char command[SDnameLn+64]; |
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int fd; |
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/* write MGF to temp file */ |
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fd = open(mktemp(strcpy(tmpfile,TEMPLATE)), O_WRONLY|O_CREAT|O_EXCL, 0600); |
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if (fd < 0) { |
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fprintf(stderr, "Cannot open temp file '%s'\n", tmpfile); |
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return(0); |
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} |
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(void)write(fd, bsp->mgf, strlen(bsp->mgf)); |
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close(fd); |
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/* set up command */ |
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if (do_instance) { |
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sprintf(command, "mgf2rad -s %s | oconv -f - > %s.oct", |
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tmpfile, bsp->name); |
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} else { |
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fflush(stdout); |
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sprintf(command, "mgf2rad -s %s", tmpfile); |
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} |
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if (system(command)) { |
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fprintf(stderr, "Error running: %s\n", command); |
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return(0); |
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} |
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unlink(tmpfile); /* remove temp file */ |
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if (do_instance) { /* need to output instance? */ |
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printf("void instance %s_g\n", bsp->name); |
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printf("1 %s.oct\n0\n0\n\n", bsp->name); |
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} |
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return(1); |
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} |
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|
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|
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/* Load a BSDF XML file and produce a corresponding Radiance object */ |
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static int |
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cvtBSDF(char *fname) |
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{ |
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int retOK; |
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SDData myBSDF; |
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char *pname, *fnbeg; |
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/* find and load the XML file */ |
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retOK = strlen(fname); |
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if (retOK < 5 || strcasecmp(fname+retOK-4, ".xml")) { |
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fprintf(stderr, "%s: input does not end in '.xml'\n", fname); |
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return(0); |
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} |
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pname = getpath(fname, getrlibpath(), R_OK); |
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if (pname == NULL) { |
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fprintf(stderr, "%s: cannot find BSDF file\n", fname); |
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return(0); |
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} |
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fnbeg = strrchr(fname, DIRSEP); |
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if (fnbeg != NULL) /* eliminate directory */ |
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fname = fnbeg+1; |
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SDclearBSDF(&myBSDF, fname); |
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if (SDreportError(SDloadFile(&myBSDF, pname), stderr)) |
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return(0); |
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retOK = (myBSDF.dim[0] > FTINY) & (myBSDF.dim[1] > FTINY); |
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if (!retOK) { |
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fprintf(stderr, "%s: zero width or height\n", fname); |
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} else { |
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if (!do_stdout) { |
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char rname[SDnameLn+4]; |
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strcpy(rname, myBSDF.name); |
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strcat(rname, ".rad"); |
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retOK = (freopen(rname, "w", stdout) != NULL); |
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} |
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if (retOK) { |
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printf("# Produced by: %s %s\n", progname, fname); |
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if (myBSDF.matn[0] && myBSDF.makr[0]) |
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printf("# Material '%s' by '%s'\n\n", |
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myBSDF.matn, myBSDF.makr); |
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if (myBSDF.mgf == NULL) { |
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faceBSDF(&myBSDF, .0); |
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} else { |
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faceBSDF(&myBSDF, myBSDF.dim[2]); |
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if (myBSDF.rb != NULL) |
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faceBSDF(&myBSDF, -myBSDF.dim[2]); |
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retOK = geomBSDF(&myBSDF); |
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} |
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} |
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} |
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SDfreeBSDF(&myBSDF); /* clean up and return */ |
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return(retOK); |
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} |
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|
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|
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/* Generate BSDF-referencing Radiance scenes, one per XML input */ |
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int |
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main(int argc, char *argv[]) |
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{ |
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int status = 0; |
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int i; |
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|
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fixargv0(argv[0]); /* sets global progname */ |
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|
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'i': |
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do_instance = 1; |
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break; |
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case 's': |
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do_stdout = 1; |
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break; |
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default: |
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goto userr; |
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} |
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if (i >= argc) { |
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fprintf(stderr, "%s: missing XML input\n", argv[0]); |
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goto userr; |
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} |
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if (i < argc-1 && do_stdout) { |
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fprintf(stderr, "%s: cannot send multiple BSDFs to stdout\n", |
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argv[0]); |
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return(1); |
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} |
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for ( ; i < argc; i++) |
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if (!cvtBSDF(argv[i])) { |
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fprintf(stderr, "%s: conversion of '%s' failed\n", |
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argv[0], argv[i]); |
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status = 1; |
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} |
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return(status); |
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userr: |
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fprintf(stderr, "Usage: %s [-i][-s] input.xml ..\n", argv[0]); |
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return(1); |
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} |
