| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: pkgBSDF.c,v 2.1 2011/06/23 18:05:18 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Take BSDF XML file and generate a referencing Radiance object |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "rtio.h" |
| 9 |
#include "paths.h" |
| 10 |
#include "bsdf.h" |
| 11 |
|
| 12 |
int do_stdout = 0; /* send Radiance object to stdout? */ |
| 13 |
int do_instance = 0; /* produce instance/octree pairs? */ |
| 14 |
|
| 15 |
|
| 16 |
/* Return appropriate suffix for Z offset */ |
| 17 |
static const char * |
| 18 |
get_suffix(double zval) |
| 19 |
{ |
| 20 |
return((zval > FTINY) ? "_f" : (zval < -FTINY) ? "_b" : ""); |
| 21 |
} |
| 22 |
|
| 23 |
|
| 24 |
/* Produce a single rectangle corresponding to the given BSDF dimensions */ |
| 25 |
static void |
| 26 |
faceBSDF(const SDData *bsp, double zval) |
| 27 |
{ |
| 28 |
const char *sfx = get_suffix(zval); |
| 29 |
/* output material */ |
| 30 |
printf("void BSDF m_%s%s\n", bsp->name, sfx); |
| 31 |
printf("6 %g %s.xml 0 1 0 .\n", zval*1.00004, bsp->name); |
| 32 |
printf("0\n0\n\n"); |
| 33 |
/* output surface */ |
| 34 |
zval *= (zval < 0) + 0.00002; |
| 35 |
printf("m_%s%s polygon %s%s\n", bsp->name, sfx, bsp->name, sfx); |
| 36 |
printf("0\n0\n12\n"); |
| 37 |
printf("\t%.6e\t%.6e\t%.6e\n", |
| 38 |
-.5*bsp->dim[0], -.5*bsp->dim[1], zval); |
| 39 |
printf("\t%.6e\t%.6e\t%.6e\n", |
| 40 |
.5*bsp->dim[0], -.5*bsp->dim[1], zval); |
| 41 |
printf("\t%.6e\t%.6e\t%.6e\n", |
| 42 |
.5*bsp->dim[0], .5*bsp->dim[1], zval); |
| 43 |
printf("\t%.6e\t%.6e\t%.6e\n\n", |
| 44 |
-.5*bsp->dim[0], .5*bsp->dim[1], zval); |
| 45 |
} |
| 46 |
|
| 47 |
|
| 48 |
/* Convert BSDF (MGF) geometry to Radiance description */ |
| 49 |
static int |
| 50 |
geomBSDF(const SDData *bsp) |
| 51 |
{ |
| 52 |
char tmpfile[64]; |
| 53 |
char command[SDnameLn+64]; |
| 54 |
int fd; |
| 55 |
/* write MGF to temp file */ |
| 56 |
fd = open(mktemp(strcpy(tmpfile,TEMPLATE)), O_WRONLY|O_CREAT|O_EXCL); |
| 57 |
if (fd < 0) { |
| 58 |
fprintf(stderr, "Cannot open temp file '%s'\n", tmpfile); |
| 59 |
return(0); |
| 60 |
} |
| 61 |
write(fd, bsp->mgf, strlen(bsp->mgf)); |
| 62 |
close(fd); |
| 63 |
/* set up command */ |
| 64 |
if (do_instance) { |
| 65 |
sprintf(command, "mgf2rad %s | oconv -f - > %s.oct", |
| 66 |
tmpfile, bsp->name); |
| 67 |
} else { |
| 68 |
fflush(stdout); |
| 69 |
sprintf(command, "mgf2rad %s", tmpfile); |
| 70 |
} |
| 71 |
if (system(command)) { |
| 72 |
fprintf(stderr, "Error running: %s\n", command); |
| 73 |
return(0); |
| 74 |
} |
| 75 |
unlink(tmpfile); /* remove temp file */ |
| 76 |
if (do_instance) { /* need to output instance? */ |
| 77 |
printf("void instance %s_g\n", bsp->name); |
| 78 |
printf("1 %s.oct\n0\n0\n\n", bsp->name); |
| 79 |
} |
| 80 |
return(1); |
| 81 |
} |
| 82 |
|
| 83 |
|
| 84 |
/* Load a BSDF XML file and produce a corresponding Radiance object */ |
| 85 |
static int |
| 86 |
cvtBSDF(char *fname) |
| 87 |
{ |
| 88 |
int retOK; |
| 89 |
SDData myBSDF; |
| 90 |
char *pname; |
| 91 |
/* find and load the XML file */ |
| 92 |
retOK = strlen(fname); |
| 93 |
if (retOK < 5 || strcmp(fname+retOK-4, ".xml")) { |
| 94 |
fprintf(stderr, "%s: input does not end in '.xml'\n", fname); |
| 95 |
return(0); |
| 96 |
} |
| 97 |
pname = getpath(fname, getrlibpath(), R_OK); |
| 98 |
if (pname == NULL) { |
| 99 |
fprintf(stderr, "%s: cannot find BSDF file\n", fname); |
| 100 |
return(0); |
| 101 |
} |
| 102 |
SDclearBSDF(&myBSDF, fname); |
| 103 |
if (SDreportEnglish(SDloadFile(&myBSDF, pname), stderr)) |
| 104 |
return(0); |
| 105 |
retOK = (myBSDF.dim[0] > FTINY) & (myBSDF.dim[1] > FTINY); |
| 106 |
if (!retOK) { |
| 107 |
fprintf(stderr, "%s: zero width or height\n", fname); |
| 108 |
} else { |
| 109 |
if (!do_stdout) { |
| 110 |
char rname[SDnameLn+4]; |
| 111 |
strcpy(rname, myBSDF.name); |
| 112 |
strcat(rname, ".rad"); |
| 113 |
retOK = (freopen(rname, "w", stdout) != NULL); |
| 114 |
} |
| 115 |
if (retOK) { |
| 116 |
if (myBSDF.mgf == NULL) { |
| 117 |
faceBSDF(&myBSDF, .0); |
| 118 |
} else { |
| 119 |
faceBSDF(&myBSDF, myBSDF.dim[2]); |
| 120 |
if (myBSDF.rb != NULL) |
| 121 |
faceBSDF(&myBSDF, -myBSDF.dim[2]); |
| 122 |
retOK = geomBSDF(&myBSDF); |
| 123 |
} |
| 124 |
} |
| 125 |
} |
| 126 |
SDfreeBSDF(&myBSDF); /* clean up and return */ |
| 127 |
return(retOK); |
| 128 |
} |
| 129 |
|
| 130 |
|
| 131 |
/* Generate BSDF-referencing Radiance scenes, one per XML input */ |
| 132 |
int |
| 133 |
main(int argc, char *argv[]) |
| 134 |
{ |
| 135 |
int status = 0; |
| 136 |
int i; |
| 137 |
|
| 138 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 139 |
switch (argv[i][1]) { |
| 140 |
case 'i': |
| 141 |
do_instance = 1; |
| 142 |
break; |
| 143 |
case 's': |
| 144 |
do_stdout = 1; |
| 145 |
break; |
| 146 |
default: |
| 147 |
goto userr; |
| 148 |
} |
| 149 |
if (i >= argc) { |
| 150 |
fprintf(stderr, "%s: missing XML input\n", argv[0]); |
| 151 |
goto userr; |
| 152 |
} |
| 153 |
if (i < argc-1 && do_stdout) { |
| 154 |
fprintf(stderr, "%s: cannot send multiple BSDFs to stdout\n", |
| 155 |
argv[0]); |
| 156 |
return(1); |
| 157 |
} |
| 158 |
for ( ; i < argc; i++) |
| 159 |
if (!cvtBSDF(argv[i])) { |
| 160 |
fprintf(stderr, "%s: conversion of '%s' failed\n", |
| 161 |
argv[0], argv[i]); |
| 162 |
status = 1; |
| 163 |
} |
| 164 |
return(status); |
| 165 |
userr: |
| 166 |
fprintf(stderr, "Usage: %s [-i][-s] input.xml ..\n", argv[0]); |
| 167 |
return(1); |
| 168 |
} |
