src/rt/pmapdump.c

#ifndef lint
static const char RCSid[] = "$Id: pmapdump.c,v 4.18.1.1 2016/02/04 19:34:11 taschreg Exp taschreg $";
#endif

/* 
   ======================================================================
   Dump photon maps as RADIANCE scene description to stdout

   Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
   (c) Fraunhofer Institute for Solar Energy Systems,
   (c) Lucerne University of Applied Sciences and Arts,
       supported by the Swiss National Science Foundation (SNSF, #147053)
   ======================================================================
   
   $Id: pmapdump.c,v 4.18.1.1 2016/02/04 19:34:11 taschreg Exp taschreg $
*/


#include "pmapio.h"
#include "pmapparm.h"
#include "pmaptype.h"
#include "rtio.h"
#include "resolu.h"
#include "random.h"
#include "math.h"

#define PMAPDUMP_REC "$Revision: 4.18.1.1 $"   


/* Defaults */
/*    Sphere radius as fraction of avg. intersphere dist */
/*    Relative scale for sphere radius (fudge factor) */
/*    Number of spheres */
#define RADCOEFF 0.05
#define RADSCALE 1.0
#define NSPHERES 10000


/* RADIANCE material and object defs for each photon type */
typedef struct {
   char *mat, *obj;
} RadianceDef;

   
/* Colour code is as follows:    global         = blue
                                 precomp global = cyan
                                 caustic        = red
                                 volume         = green
                                 direct         = magenta 
                                 contrib        = yellow */   
const RadianceDef radDefs [] = {
   {  "void plastic mat.global\n0\n0\n5 0 0 1 0 0\n",
      "mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void plastic mat.pglobal\n0\n0\n5 0 1 1 0 0\n",
      "mat.pglobal sphere obj.global\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void plastic mat.caustic\n0\n0\n5 1 0 0 0 0\n",
      "mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void plastic mat.volume\n0\n0\n5 0 1 0 0 0\n",
      "mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void plastic mat.direct\n0\n0\n5 1 0 1 0 0\n",
      "mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void plastic mat.contrib\n0\n0\n5 1 1 0 0 0\n",
      "mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n"
   }
};


int main (int argc, char** argv)
{
   char           format [128];
   RREAL          rad, radScale = RADSCALE, vol, dumpRatio;
   unsigned       arg, j, ptype;
   long           numSpheres = NSPHERES;
   FILE           *pmapFile;
   PhotonMap      pm;
   PhotonPrimary  pri;
   Photon         p;
#ifdef PMAP_OOC
   char           leafFname [1024];
#endif
   
   if (argc < 2) {
      puts("Dump photon maps as RADIANCE scene description\n");
      printf("Usage: %s [-r radscale1] [-n nspheres1] pmap1 "
             "[-r radscale2] [-n nspheres2] pmap2 ...\n", argv [0]);
      return 1;
   }
   
   for (arg = 1; arg < argc; arg++) {
      /* Parse options */
      if (argv [arg][0] == '-') {
         switch (argv [arg][1]) {
            case 'r':
               if ((radScale = atof(argv [++arg])) <= 0)
                  error(USER, "invalid radius scale");
               break;
               
            case 'n':
               if ((numSpheres = parseMultiplier(argv [++arg])) <= 0)
                  error(USER, "invalid number of spheres");
               break;
               
            default:
               sprintf(errmsg, "unknown option %s", argv [arg]);
               error(USER, errmsg);
               return -1;
         }
         
         continue;
      }
      
      /* Dump photon map */
      if (!(pmapFile = fopen(argv [arg], "rb"))) {
         sprintf(errmsg, "can't open %s", argv [arg]);
         error(SYSTEM, errmsg);
      }
         
      /* Get format string */
      strcpy(format, PMAP_FORMAT_GLOB);
      if (checkheader(pmapFile, format, NULL) != 1) {
         sprintf(errmsg, "photon map file %s has unknown format %s", 
                 argv [arg], format);
         error(USER, errmsg);
      }
      
      /* Identify photon map type from format string */
      for (ptype = 0; 
           ptype < NUM_PMAP_TYPES && strcmp(pmapFormat [ptype], format);
           ptype++);
      
      if (!validPmapType(ptype)) {
         sprintf(errmsg, "file %s contains an unknown photon map type", 
                argv [arg]);
         error(USER, errmsg);
      }

      /* Get file format version and check for compatibility */
      if (strcmp(getstr(format, pmapFile), PMAP_FILEVER))      
         error(USER, "incompatible photon map file format");
         
      /* Dump command line as comment */
      fputs("# ", stdout);
      printargs(argc, argv, stdout);
      fputc('\n', stdout);
      
      /* Dump material def */   
      fputs(radDefs [ptype].mat, stdout);
      fputc('\n', stdout);
      
      /* Get number of photons */
      pm.numPhotons = getint(sizeof(pm.numPhotons), pmapFile);
      
      /* Skip avg photon flux */ 
      for (j = 0; j < 3; j++) 
         getflt(pmapFile);
      
      /* Get distribution extent (min & max photon positions) */
      for (j = 0; j < 3; j++) {
         pm.minPos [j] = getflt(pmapFile);
         pm.maxPos [j] = getflt(pmapFile);
      }
      
      /* Skip centre of gravity, and avg photon dist to it */
      for (j = 0; j < 4; j++)
         getflt(pmapFile);
      
      /* Sphere radius based on avg intersphere dist 
         (= sphere distrib density ^-1/3) */
      vol = (pm.maxPos [0] - pm.minPos [0]) * (pm.maxPos [1] - pm.minPos [1]) * 
            (pm.maxPos [2] - pm.minPos [2]);
      rad = radScale * RADCOEFF * pow(vol / numSpheres, 1./3.);
      
      /* Photon dump probability to satisfy target sphere count */
      dumpRatio = numSpheres < pm.numPhotons 
                  ? (float)numSpheres / pm.numPhotons : 1;
      
      /* Skip primary rays */
      pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile);
      while (pm.numPrimary-- > 0) {
         getint(sizeof(pri.srcIdx) + sizeof(pri.dir), pmapFile);
         for (j = 0; j < 3; j++)
            getflt(pmapFile);
      }

#ifdef PMAP_OOC
      /* Open leaf file with filename derived from pmap, replace pmapFile
       * (which is currently the node file) */
      strncpy(leafFname, argv [arg], 1024);
      strncat(leafFname, PMAP_OOC_LEAFSUFFIX, 1024);
      fclose(pmapFile);
      if (!(pmapFile = fopen(leafFname, "rb"))) {
         sprintf(errmsg, "cannot open leaf file %s", leafFname);
         error(SYSTEM, errmsg);
      }
#endif
            
      /* Load photons */      
      while (pm.numPhotons-- > 0) {
#ifdef PMAP_OOC
         /* Get entire photon record 
            !!! OOC PMAP FILES CURRENTLY DON'T USE PORTABLE I/O !!! */
         if (!fread(&p, sizeof(p), 1, pmapFile)) {
            sprintf(errmsg, "error reading OOC leaf file %s", leafFname);
            error(SYSTEM, errmsg);
         }
#else         
         /* Get photon position */            
         for (j = 0; j < 3; j++) 
            p.pos [j] = getflt(pmapFile);
#endif
         /* Dump photon probabilistically acc. to target sphere count */
         if (frandom() <= dumpRatio) {
            printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2], rad);
            fputc('\n', stdout);
         }
         
#ifndef PMAP_OOC
         /* Skip photon normal and flux */
         for (j = 0; j < 3; j++) 
            getint(sizeof(p.norm [j]), pmapFile);
            
#ifdef PMAP_FLOAT_FLUX
         for (j = 0; j < 3; j++) 
            getflt(pmapFile);
#else      
         for (j = 0; j < 4; j++) 
            getint(1, pmapFile);
#endif

         /* Skip primary ray index */
         getint(sizeof(p.primary), pmapFile);

         /* Skip flags */
         getint(sizeof(p.flags), pmapFile);
#endif
         
         if (ferror(pmapFile) || feof(pmapFile)) {
            sprintf(errmsg, "error reading %s", argv [arg]);
            error(USER, errmsg);
         }
      }
      
      fclose(pmapFile);
      
      /* Reset defaults for next dump */
      radScale = RADSCALE;
      numSpheres = NSPHERES;
   }
   
   return 0;
}
Revision:	2.7
Committed:	Tue May 17 17:39:47 2016 UTC (7 years, 11 months ago) by rschregle
Content type:	text/plain
Branch:	MAIN
Changes since 2.6:	+69 -32 lines
Log Message:	Initial import of ooC photon map
#	User	Rev	Content
1	greg	2.4	#ifndef lint
2	rschregle	2.7	static const char RCSid[] = "$Id: pmapdump.c,v 4.18.1.1 2016/02/04 19:34:11 taschreg Exp taschreg $";
3	greg	2.4	#endif
4	rschregle	2.7
5	greg	2.1	/*
6	rschregle	2.7	======================================================================
7	greg	2.1	Dump photon maps as RADIANCE scene description to stdout
8
9			Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
10			(c) Fraunhofer Institute for Solar Energy Systems,
11	rschregle	2.3	(c) Lucerne University of Applied Sciences and Arts,
12	rschregle	2.7	supported by the Swiss National Science Foundation (SNSF, #147053)
13			======================================================================
14	greg	2.1
15	rschregle	2.7	$Id: pmapdump.c,v 4.18.1.1 2016/02/04 19:34:11 taschreg Exp taschreg $
16	greg	2.1	*/
17
18
19
20			#include "pmapio.h"
21			#include "pmapparm.h"
22			#include "pmaptype.h"
23			#include "rtio.h"
24			#include "resolu.h"
25			#include "random.h"
26	greg	2.2	#include "math.h"
27	greg	2.1
28	rschregle	2.7	#define PMAPDUMP_REC "$Revision: 4.18.1.1 $"
29
30	greg	2.1
31			/* Defaults */
32			/* Sphere radius as fraction of avg. intersphere dist */
33			/* Relative scale for sphere radius (fudge factor) */
34			/* Number of spheres */
35			#define RADCOEFF 0.05
36			#define RADSCALE 1.0
37			#define NSPHERES 10000
38
39
40			/* RADIANCE material and object defs for each photon type */
41			typedef struct {
42			char mat, obj;
43			} RadianceDef;
44
45
46
47			/* Colour code is as follows: global = blue
48			precomp global = cyan
49			caustic = red
50			volume = green
51			direct = magenta
52			contrib = yellow */
53			const RadianceDef radDefs [] = {
54			{ "void plastic mat.global\n0\n0\n5 0 0 1 0 0\n",
55			"mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n"
56			},
57			{ "void plastic mat.pglobal\n0\n0\n5 0 1 1 0 0\n",
58			"mat.pglobal sphere obj.global\n0\n0\n4 %g %g %g %g\n"
59			},
60			{ "void plastic mat.caustic\n0\n0\n5 1 0 0 0 0\n",
61			"mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n"
62			},
63			{ "void plastic mat.volume\n0\n0\n5 0 1 0 0 0\n",
64			"mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n"
65			},
66			{ "void plastic mat.direct\n0\n0\n5 1 0 1 0 0\n",
67			"mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n"
68			},
69			{ "void plastic mat.contrib\n0\n0\n5 1 1 0 0 0\n",
70			"mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n"
71			}
72			};
73
74
75
76			int main (int argc, char** argv)
77			{
78	rschregle	2.7	char format [128];
79			RREAL rad, radScale = RADSCALE, vol, dumpRatio;
80			unsigned arg, j, ptype;
81			long numSpheres = NSPHERES;
82			FILE *pmapFile;
83			PhotonMap pm;
84			PhotonPrimary pri;
85			Photon p;
86			#ifdef PMAP_OOC
87			char leafFname [1024];
88			#endif
89	greg	2.1
90			if (argc < 2) {
91			puts("Dump photon maps as RADIANCE scene description\n");
92			printf("Usage: %s [-r radscale1] [-n nspheres1] pmap1 "
93			"[-r radscale2] [-n nspheres2] pmap2 ...\n", argv [0]);
94			return 1;
95			}
96
97			for (arg = 1; arg < argc; arg++) {
98			/* Parse options */
99			if (argv [arg][0] == '-') {
100			switch (argv [arg][1]) {
101			case 'r':
102			if ((radScale = atof(argv [++arg])) <= 0)
103			error(USER, "invalid radius scale");
104			break;
105
106			case 'n':
107			if ((numSpheres = parseMultiplier(argv [++arg])) <= 0)
108			error(USER, "invalid number of spheres");
109			break;
110
111			default:
112			sprintf(errmsg, "unknown option %s", argv [arg]);
113			error(USER, errmsg);
114			return -1;
115			}
116
117			continue;
118			}
119
120			/* Dump photon map */
121			if (!(pmapFile = fopen(argv [arg], "rb"))) {
122			sprintf(errmsg, "can't open %s", argv [arg]);
123			error(SYSTEM, errmsg);
124			}
125
126			/* Get format string */
127			strcpy(format, PMAP_FORMAT_GLOB);
128			if (checkheader(pmapFile, format, NULL) != 1) {
129			sprintf(errmsg, "photon map file %s has unknown format %s",
130			argv [arg], format);
131			error(USER, errmsg);
132			}
133
134			/* Identify photon map type from format string */
135			for (ptype = 0;
136	rschregle	2.6	ptype < NUM_PMAP_TYPES && strcmp(pmapFormat [ptype], format);
137	greg	2.1	ptype++);
138
139			if (!validPmapType(ptype)) {
140			sprintf(errmsg, "file %s contains an unknown photon map type",
141			argv [arg]);
142			error(USER, errmsg);
143			}
144
145			/* Get file format version and check for compatibility */
146	rschregle	2.7	if (strcmp(getstr(format, pmapFile), PMAP_FILEVER))
147	greg	2.1	error(USER, "incompatible photon map file format");
148
149			/* Dump command line as comment */
150			fputs("# ", stdout);
151			printargs(argc, argv, stdout);
152			fputc('\n', stdout);
153
154			/* Dump material def */
155			fputs(radDefs [ptype].mat, stdout);
156			fputc('\n', stdout);
157
158	rschregle	2.7	/* Get number of photons */
159			pm.numPhotons = getint(sizeof(pm.numPhotons), pmapFile);
160	greg	2.1
161			/* Skip avg photon flux */
162			for (j = 0; j < 3; j++)
163			getflt(pmapFile);
164
165			/* Get distribution extent (min & max photon positions) */
166			for (j = 0; j < 3; j++) {
167	rschregle	2.7	pm.minPos [j] = getflt(pmapFile);
168			pm.maxPos [j] = getflt(pmapFile);
169	greg	2.1	}
170
171			/* Skip centre of gravity, and avg photon dist to it */
172			for (j = 0; j < 4; j++)
173			getflt(pmapFile);
174
175			/* Sphere radius based on avg intersphere dist
176			(= sphere distrib density ^-1/3) */
177	rschregle	2.7	vol = (pm.maxPos [0] - pm.minPos [0]) * (pm.maxPos [1] - pm.minPos [1]) *
178			(pm.maxPos [2] - pm.minPos [2]);
179	greg	2.2	rad = radScale * RADCOEFF * pow(vol / numSpheres, 1./3.);
180	greg	2.1
181			/* Photon dump probability to satisfy target sphere count */
182	rschregle	2.7	dumpRatio = numSpheres < pm.numPhotons
183			? (float)numSpheres / pm.numPhotons : 1;
184	greg	2.1
185	rschregle	2.7	/* Skip primary rays */
186			pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile);
187			while (pm.numPrimary-- > 0) {
188			getint(sizeof(pri.srcIdx) + sizeof(pri.dir), pmapFile);
189			for (j = 0; j < 3; j++)
190			getflt(pmapFile);
191			}
192
193			#ifdef PMAP_OOC
194			/* Open leaf file with filename derived from pmap, replace pmapFile
195			* (which is currently the node file) */
196			strncpy(leafFname, argv [arg], 1024);
197			strncat(leafFname, PMAP_OOC_LEAFSUFFIX, 1024);
198			fclose(pmapFile);
199			if (!(pmapFile = fopen(leafFname, "rb"))) {
200			sprintf(errmsg, "cannot open leaf file %s", leafFname);
201			error(SYSTEM, errmsg);
202			}
203			#endif
204
205			/* Load photons */
206			while (pm.numPhotons-- > 0) {
207			#ifdef PMAP_OOC
208			/* Get entire photon record
209			!!! OOC PMAP FILES CURRENTLY DON'T USE PORTABLE I/O !!! */
210			if (!fread(&p, sizeof(p), 1, pmapFile)) {
211			sprintf(errmsg, "error reading OOC leaf file %s", leafFname);
212			error(SYSTEM, errmsg);
213			}
214			#else
215	greg	2.1	/* Get photon position */
216			for (j = 0; j < 3; j++)
217			p.pos [j] = getflt(pmapFile);
218	rschregle	2.7	#endif
219	greg	2.1	/* Dump photon probabilistically acc. to target sphere count */
220			if (frandom() <= dumpRatio) {
221			printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2], rad);
222			fputc('\n', stdout);
223			}
224
225	rschregle	2.7	#ifndef PMAP_OOC
226	greg	2.1	/* Skip photon normal and flux */
227			for (j = 0; j < 3; j++)
228			getint(sizeof(p.norm [j]), pmapFile);
229
230	rschregle	2.7	#ifdef PMAP_FLOAT_FLUX
231			for (j = 0; j < 3; j++)
232			getflt(pmapFile);
233			#else
234			for (j = 0; j < 4; j++)
235			getint(1, pmapFile);
236			#endif
237	greg	2.1
238			/* Skip primary ray index */
239			getint(sizeof(p.primary), pmapFile);
240
241			/* Skip flags */
242			getint(sizeof(p.flags), pmapFile);
243	rschregle	2.7	#endif
244	greg	2.1
245	rschregle	2.7	if (ferror(pmapFile) \|\| feof(pmapFile)) {
246	greg	2.1	sprintf(errmsg, "error reading %s", argv [arg]);
247			error(USER, errmsg);
248			}
249			}
250
251			fclose(pmapFile);
252
253			/* Reset defaults for next dump */
254			radScale = RADSCALE;
255			numSpheres = NSPHERES;
256			}
257
258			return 0;
259			}