src/rt/pmapdump.c

#ifndef lint
static const char RCSid[] = "$Id: pmapdump.c,v 2.14 2019/01/22 18:28:23 rschregle Exp $";
#endif

/* 
   ======================================================================
   Dump photon maps as RADIANCE scene description or ASCII point list
   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 2.14 2019/01/22 18:28:23 rschregle Exp $
*/


#include "pmap.h"
#include "pmapio.h"
#include "rtio.h"
#include "resolu.h"
#include "random.h"
#include "math.h"


/* 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

/* Format for optional ASCII output as XYZ RGB points */
#define POINTFMT "%g\t%g\t%g\t%g\t%g\t%g\n"

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

const RadianceDef radDefs [] = {
   {  "void glow mat.global\n0\n0\n4 %g %g %g 0\n",
      "mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void glow mat.pglobal\n0\n0\n4 %g %g %g 0\n",
      "mat.pglobal sphere obj.pglobal\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void glow mat.caustic\n0\n0\n4 %g %g %g 0\n",
      "mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void glow mat.volume\n0\n0\n4 %g %g %g 0\n",
      "mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void glow mat.direct\n0\n0\n4 %g %g %g 0\n",
      "mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n"
   },
   {  "void glow mat.contrib\n0\n0\n4 %g %g %g 0\n",
      "mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n"
   }
};


/* Default colour codes are as follows:   global         = blue
                                          precomp global = cyan
                                          caustic        = red
                                          volume         = green
                                          direct         = magenta 
                                          contrib        = yellow */
const COLOR colDefs [] = {
   {0.25, 0.25, 2}, {0.1, 1, 1}, {1, 0.1, 0.1}, 
   {0.1, 1, 0.1}, {1, 0.1, 1}, {1, 1, 0.1}
};


static int setBool(char *str, unsigned pos, unsigned *var)
{
   switch ((str) [pos]) {
      case '\0': 
         *var = !*var; 
         break;
      case 'y': case 'Y': case 't': case 'T': case '+': case '1': 
         *var = 1; 
         break;
      case 'n': case 'N': case 'f': case 'F': case '-': case '0': 
         *var = 0; 
         break;
      default: 
         return 0;
   }
   
   return 1;
}


int main (int argc, char** argv)
{
   char           format [MAXFMTLEN];
   RREAL          rad, radScale = RADSCALE, extent, dumpRatio;
   unsigned       arg, j, ptype, dim, fluxCol = 0, points = 0;
   long           numSpheres = NSPHERES;
   COLOR          col = {0, 0, 0};
   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 "
           "or ASCII point list\n");
      printf("Usage: %s "
             "[-a] [-r radscale1] [-n num1] "
             "[-f | -c rcol1 gcol1 bcol1] pmap1 "
             "[-a] [-r radscale2] [-n num2] "
             "[-f | -c rcol2 gcol2 bcol2] pmap2 "
             "...\n", argv [0]);
      return 1;
   }
   
   for (arg = 1; arg < argc; arg++) {
      /* Parse options */
      if (argv [arg][0] == '-') {
         switch (argv [arg][1]) {
            case 'a':
               if (!setBool(argv [arg], 2, &points))
                  error(USER, "invalid option syntax at -a");
               break;
            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 points/spheres");
               break;
               
            case 'c':
               if (fluxCol)
                  error(USER, "-f and -c are mutually exclusive");
               
               if (badarg(argc - arg - 1, &argv [arg + 1], "fff"))
                  error(USER, "invalid RGB colour");
                                 
               for (j = 0; j < 3; j++)
                  col [j] = atof(argv [++arg]);
               break;
               
            case 'f':
               if (intens(col) > 0)
                  error(USER, "-f and -c are mutually exclusive");
                  
               if (!setBool(argv [arg], 2, &fluxCol))
                  error(USER, "invalid option syntax at -f");
               break;
               
            default:
               sprintf(errmsg, "unknown option %s", argv [arg]);
               error(USER, errmsg);
               return -1;
         }
         
         continue;
      }

      /* Open next photon map file */
      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");

      if (!points) {
         /* Dump command line as comment */
         fputs("# ", stdout);
         printargs(argc, argv, stdout);
         fputc('\n', stdout);
      }
         
      /* Set point/sphere colour if independent of photon flux, 
         output RADIANCE material def if required */
      if (!fluxCol) {
         if (intens(col) <= 0)
            copycolor(col, colDefs [ptype]);
         if (!points) {
            printf(radDefs [ptype].mat, col [0], col [1], col [2]);
            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 depending on
         whether the distribution occupies a 1D line (!), a 2D plane, 
         or 3D volume (= sphere distrib density ^-1/d, where d is the
         dimensionality of the distribution) */
      for (j = 0, extent = 1.0, dim = 0; j < 3; j++) {
         rad = pm.maxPos [j] - pm.minPos [j];
         
         if (rad > FTINY) {
            dim++;
            extent *= rad;
         }
      }

      rad = radScale * RADCOEFF * pow(extent / numSpheres, 1./dim);
      
      /* Photon dump probability to satisfy target sphere count */
      dumpRatio = min(1, (float)numSpheres / pm.numPhotons);
      
      /* Skip primary rays */
      pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile);
      while (pm.numPrimary-- > 0) {
         /* Skip source index & incident dir */
         getint(sizeof(pri.srcIdx), pmapFile);
#ifdef PMAP_PRIMARYDIR
         /* Skip primary incident dir */
         getint(sizeof(pri.dir), pmapFile);         
#endif
#ifdef PMAP_PRIMARYPOS
         /* Skip primary hitpoint */
         for (j = 0; j < 3; j++)
            getflt(pmapFile);
#endif
      }

#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
            
      /* Read photons */
      while (pm.numPhotons-- > 0) {
#ifdef PMAP_OOC
         /* Get entire photon record from ooC octree leaf file
            !!! 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 /* kd-tree */
         /* Get photon position */
         for (j = 0; j < 3; j++) 
            p.pos [j] = getflt(pmapFile);

         /* Get photon normal (currently not used) */
         for (j = 0; j < 3; j++) 
            p.norm [j] = getint(1, pmapFile);

         /* Get photon flux */
   #ifdef PMAP_FLOAT_FLUX
         for (j = 0; j < 3; j++) 
            p.flux [j] = getflt(pmapFile);
   #else
         for (j = 0; j < 4; j++) 
            p.flux [j] = getint(1, pmapFile);
   #endif
   
         
         /* Skip primary ray index */
         getint(sizeof(p.primary), pmapFile);

         /* Skip flags */
         getint(sizeof(p.flags), pmapFile);
#endif

         /* Dump photon probabilistically acc. to target sphere count */
         if (frandom() <= dumpRatio) {
            if (fluxCol) {
               /* Get photon flux */
               getPhotonFlux(&p, col);
               /* Scale by dumpRatio for energy conservation */
               scalecolor(col, 1.0 / dumpRatio);
            }
            
            if (!points) {
               if (fluxCol) {
                  /* Dump material def if variable (depends on flux) */
                  printf(radDefs [ptype].mat, col [0], col [1], col [2]);
                  fputc('\n', stdout);
               }
               printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2],
                      rad);
               fputc('\n', stdout);
            }
            else /* Dump as XYZ RGB point */
               printf(POINTFMT, p.pos [0], p.pos [1], p.pos [2],
                      col [0], col [1] ,col [2]);
         }
         
         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;
      col [0] = col [1] = col [2] = 0;
      fluxCol = points = 0;
   }
   
   return 0;
}
Revision:	2.15
Committed:	Wed Aug 14 18:02:11 2019 UTC (6 years, 2 months ago) by rschregle
Content type:	text/plain
Branch:	MAIN
Changes since 2.14:	+8 -3 lines
Log Message:	Photon flux is scaled by the fraction of dumped photons when using -f.
#	User	Rev	Content
1	greg	2.4	#ifndef lint
2	rschregle	2.15	static const char RCSid[] = "$Id: pmapdump.c,v 2.14 2019/01/22 18:28:23 rschregle Exp $";
3	greg	2.4	#endif
4	rschregle	2.7
5	greg	2.1	/*
6	rschregle	2.7	======================================================================
7	rschregle	2.14	Dump photon maps as RADIANCE scene description or ASCII point list
8			to stdout
9	greg	2.1
10			Roland Schregle (roland.schregle@{hslu.ch, gmail.com})
11			(c) Fraunhofer Institute for Solar Energy Systems,
12	rschregle	2.3	(c) Lucerne University of Applied Sciences and Arts,
13	rschregle	2.7	supported by the Swiss National Science Foundation (SNSF, #147053)
14			======================================================================
15	greg	2.1
16	rschregle	2.15	$Id: pmapdump.c,v 2.14 2019/01/22 18:28:23 rschregle Exp $
17	greg	2.1	*/
18
19
20
21	rschregle	2.14	#include "pmap.h"
22	greg	2.1	#include "pmapio.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
29			/* Defaults */
30			/* Sphere radius as fraction of avg. intersphere dist */
31			/* Relative scale for sphere radius (fudge factor) */
32			/* Number of spheres */
33			#define RADCOEFF 0.05
34			#define RADSCALE 1.0
35			#define NSPHERES 10000
36
37	rschregle	2.14	/* Format for optional ASCII output as XYZ RGB points */
38			#define POINTFMT "%g\t%g\t%g\t%g\t%g\t%g\n"
39	greg	2.1
40			/* RADIANCE material and object defs for each photon type */
41			typedef struct {
42			char mat, obj;
43			} RadianceDef;
44
45			const RadianceDef radDefs [] = {
46	rschregle	2.14	{ "void glow mat.global\n0\n0\n4 %g %g %g 0\n",
47	greg	2.1	"mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n"
48			},
49	rschregle	2.14	{ "void glow mat.pglobal\n0\n0\n4 %g %g %g 0\n",
50	rschregle	2.13	"mat.pglobal sphere obj.pglobal\n0\n0\n4 %g %g %g %g\n"
51	greg	2.1	},
52	rschregle	2.14	{ "void glow mat.caustic\n0\n0\n4 %g %g %g 0\n",
53	greg	2.1	"mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n"
54			},
55	rschregle	2.14	{ "void glow mat.volume\n0\n0\n4 %g %g %g 0\n",
56	greg	2.1	"mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n"
57			},
58	rschregle	2.14	{ "void glow mat.direct\n0\n0\n4 %g %g %g 0\n",
59	greg	2.1	"mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n"
60			},
61	rschregle	2.14	{ "void glow mat.contrib\n0\n0\n4 %g %g %g 0\n",
62	greg	2.1	"mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n"
63			}
64			};
65
66	rschregle	2.14
67	rschregle	2.12	/* Default colour codes are as follows: global = blue
68			precomp global = cyan
69			caustic = red
70			volume = green
71			direct = magenta
72			contrib = yellow */
73			const COLOR colDefs [] = {
74	rschregle	2.13	{0.25, 0.25, 2}, {0.1, 1, 1}, {1, 0.1, 0.1},
75			{0.1, 1, 0.1}, {1, 0.1, 1}, {1, 1, 0.1}
76	rschregle	2.12	};
77	greg	2.1
78
79	rschregle	2.14	static int setBool(char str, unsigned pos, unsigned var)
80			{
81			switch ((str) [pos]) {
82			case '\0':
83			var = !var;
84			break;
85			case 'y': case 'Y': case 't': case 'T': case '+': case '1':
86			*var = 1;
87			break;
88			case 'n': case 'N': case 'f': case 'F': case '-': case '0':
89			*var = 0;
90			break;
91			default:
92			return 0;
93			}
94
95			return 1;
96			}
97
98
99	greg	2.1	int main (int argc, char** argv)
100			{
101	greg	2.11	char format [MAXFMTLEN];
102	rschregle	2.9	RREAL rad, radScale = RADSCALE, extent, dumpRatio;
103	rschregle	2.14	unsigned arg, j, ptype, dim, fluxCol = 0, points = 0;
104	rschregle	2.7	long numSpheres = NSPHERES;
105	rschregle	2.14	COLOR col = {0, 0, 0};
106	rschregle	2.7	FILE *pmapFile;
107			PhotonMap pm;
108			PhotonPrimary pri;
109			Photon p;
110			#ifdef PMAP_OOC
111			char leafFname [1024];
112			#endif
113	rschregle	2.13
114	greg	2.1	if (argc < 2) {
115	rschregle	2.14	puts("Dump photon maps as RADIANCE scene description "
116			"or ASCII point list\n");
117	rschregle	2.12	printf("Usage: %s "
118	rschregle	2.14	"[-a] [-r radscale1] [-n num1] "
119			"[-f \| -c rcol1 gcol1 bcol1] pmap1 "
120			"[-a] [-r radscale2] [-n num2] "
121			"[-f \| -c rcol2 gcol2 bcol2] pmap2 "
122	rschregle	2.12	"...\n", argv [0]);
123	greg	2.1	return 1;
124			}
125
126			for (arg = 1; arg < argc; arg++) {
127			/* Parse options */
128			if (argv [arg][0] == '-') {
129			switch (argv [arg][1]) {
130	rschregle	2.14	case 'a':
131			if (!setBool(argv [arg], 2, &points))
132			error(USER, "invalid option syntax at -a");
133			break;
134	greg	2.1	case 'r':
135			if ((radScale = atof(argv [++arg])) <= 0)
136			error(USER, "invalid radius scale");
137			break;
138
139			case 'n':
140			if ((numSpheres = parseMultiplier(argv [++arg])) <= 0)
141	rschregle	2.14	error(USER, "invalid number of points/spheres");
142	greg	2.1	break;
143
144	rschregle	2.12	case 'c':
145	rschregle	2.13	if (fluxCol)
146			error(USER, "-f and -c are mutually exclusive");
147
148			if (badarg(argc - arg - 1, &argv [arg + 1], "fff"))
149			error(USER, "invalid RGB colour");
150
151	rschregle	2.12	for (j = 0; j < 3; j++)
152	rschregle	2.14	col [j] = atof(argv [++arg]);
153	rschregle	2.13	break;
154
155			case 'f':
156	rschregle	2.14	if (intens(col) > 0)
157	rschregle	2.13	error(USER, "-f and -c are mutually exclusive");
158
159			if (!setBool(argv [arg], 2, &fluxCol))
160			error(USER, "invalid option syntax at -f");
161	rschregle	2.12	break;
162
163	greg	2.1	default:
164			sprintf(errmsg, "unknown option %s", argv [arg]);
165			error(USER, errmsg);
166			return -1;
167			}
168
169			continue;
170			}
171	rschregle	2.13
172	rschregle	2.14	/* Open next photon map file */
173	greg	2.1	if (!(pmapFile = fopen(argv [arg], "rb"))) {
174			sprintf(errmsg, "can't open %s", argv [arg]);
175			error(SYSTEM, errmsg);
176			}
177	rschregle	2.13
178	greg	2.1	/* Get format string */
179			strcpy(format, PMAP_FORMAT_GLOB);
180			if (checkheader(pmapFile, format, NULL) != 1) {
181			sprintf(errmsg, "photon map file %s has unknown format %s",
182			argv [arg], format);
183			error(USER, errmsg);
184			}
185	rschregle	2.13
186	greg	2.1	/* Identify photon map type from format string */
187			for (ptype = 0;
188	rschregle	2.6	ptype < NUM_PMAP_TYPES && strcmp(pmapFormat [ptype], format);
189	greg	2.1	ptype++);
190	rschregle	2.13
191	greg	2.1	if (!validPmapType(ptype)) {
192			sprintf(errmsg, "file %s contains an unknown photon map type",
193			argv [arg]);
194			error(USER, errmsg);
195			}
196
197			/* Get file format version and check for compatibility */
198	rschregle	2.7	if (strcmp(getstr(format, pmapFile), PMAP_FILEVER))
199	greg	2.1	error(USER, "incompatible photon map file format");
200	rschregle	2.13
201	rschregle	2.14	if (!points) {
202			/* Dump command line as comment */
203			fputs("# ", stdout);
204			printargs(argc, argv, stdout);
205			fputc('\n', stdout);
206			}
207
208			/* Set point/sphere colour if independent of photon flux,
209			output RADIANCE material def if required */
210	rschregle	2.13	if (!fluxCol) {
211	rschregle	2.14	if (intens(col) <= 0)
212			copycolor(col, colDefs [ptype]);
213			if (!points) {
214			printf(radDefs [ptype].mat, col [0], col [1], col [2]);
215			fputc('\n', stdout);
216			}
217	rschregle	2.13	}
218	greg	2.1
219	rschregle	2.7	/* Get number of photons */
220			pm.numPhotons = getint(sizeof(pm.numPhotons), pmapFile);
221	rschregle	2.13
222	greg	2.1	/* Skip avg photon flux */
223			for (j = 0; j < 3; j++)
224			getflt(pmapFile);
225	rschregle	2.13
226	greg	2.1	/* Get distribution extent (min & max photon positions) */
227			for (j = 0; j < 3; j++) {
228	rschregle	2.7	pm.minPos [j] = getflt(pmapFile);
229			pm.maxPos [j] = getflt(pmapFile);
230	greg	2.1	}
231
232			/* Skip centre of gravity, and avg photon dist to it */
233			for (j = 0; j < 4; j++)
234			getflt(pmapFile);
235
236	rschregle	2.9	/* Sphere radius based on avg intersphere dist depending on
237			whether the distribution occupies a 1D line (!), a 2D plane,
238			or 3D volume (= sphere distrib density ^-1/d, where d is the
239			dimensionality of the distribution) */
240			for (j = 0, extent = 1.0, dim = 0; j < 3; j++) {
241			rad = pm.maxPos [j] - pm.minPos [j];
242
243			if (rad > FTINY) {
244			dim++;
245			extent *= rad;
246			}
247			}
248
249			rad = radScale * RADCOEFF * pow(extent / numSpheres, 1./dim);
250	greg	2.1
251			/* Photon dump probability to satisfy target sphere count */
252	rschregle	2.14	dumpRatio = min(1, (float)numSpheres / pm.numPhotons);
253	greg	2.1
254	rschregle	2.7	/* Skip primary rays */
255			pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile);
256			while (pm.numPrimary-- > 0) {
257	rschregle	2.8	/* Skip source index & incident dir */
258	rschregle	2.10	getint(sizeof(pri.srcIdx), pmapFile);
259			#ifdef PMAP_PRIMARYDIR
260			/* Skip primary incident dir */
261			getint(sizeof(pri.dir), pmapFile);
262	rschregle	2.13	#endif
263			#ifdef PMAP_PRIMARYPOS
264	rschregle	2.8	/* Skip primary hitpoint */
265	rschregle	2.7	for (j = 0; j < 3; j++)
266			getflt(pmapFile);
267	rschregle	2.8	#endif
268	rschregle	2.7	}
269
270			#ifdef PMAP_OOC
271			/* Open leaf file with filename derived from pmap, replace pmapFile
272			* (which is currently the node file) */
273			strncpy(leafFname, argv [arg], 1024);
274			strncat(leafFname, PMAP_OOC_LEAFSUFFIX, 1024);
275			fclose(pmapFile);
276			if (!(pmapFile = fopen(leafFname, "rb"))) {
277			sprintf(errmsg, "cannot open leaf file %s", leafFname);
278			error(SYSTEM, errmsg);
279			}
280			#endif
281
282	rschregle	2.14	/* Read photons */
283	rschregle	2.7	while (pm.numPhotons-- > 0) {
284			#ifdef PMAP_OOC
285	rschregle	2.13	/* Get entire photon record from ooC octree leaf file
286	rschregle	2.7	!!! OOC PMAP FILES CURRENTLY DON'T USE PORTABLE I/O !!! */
287			if (!fread(&p, sizeof(p), 1, pmapFile)) {
288			sprintf(errmsg, "error reading OOC leaf file %s", leafFname);
289			error(SYSTEM, errmsg);
290			}
291	rschregle	2.13	#else /* kd-tree */
292			/* Get photon position */
293	greg	2.1	for (j = 0; j < 3; j++)
294			p.pos [j] = getflt(pmapFile);
295	rschregle	2.13
296			/* Get photon normal (currently not used) */
297	greg	2.1	for (j = 0; j < 3; j++)
298	rschregle	2.13	p.norm [j] = getint(1, pmapFile);
299
300			/* Get photon flux */
301			#ifdef PMAP_FLOAT_FLUX
302	rschregle	2.7	for (j = 0; j < 3; j++)
303	rschregle	2.13	p.flux [j] = getflt(pmapFile);
304			#else
305	rschregle	2.7	for (j = 0; j < 4; j++)
306	rschregle	2.13	p.flux [j] = getint(1, pmapFile);
307			#endif
308	rschregle	2.15
309
310	greg	2.1
311			/* Skip primary ray index */
312			getint(sizeof(p.primary), pmapFile);
313
314			/* Skip flags */
315			getint(sizeof(p.flags), pmapFile);
316	rschregle	2.7	#endif
317	rschregle	2.13
318			/* Dump photon probabilistically acc. to target sphere count */
319			if (frandom() <= dumpRatio) {
320	rschregle	2.15	if (fluxCol) {
321	rschregle	2.14	/* Get photon flux */
322			getPhotonFlux(&p, col);
323	rschregle	2.15	/* Scale by dumpRatio for energy conservation */
324			scalecolor(col, 1.0 / dumpRatio);
325			}
326	rschregle	2.14
327			if (!points) {
328			if (fluxCol) {
329			/* Dump material def if variable (depends on flux) */
330			printf(radDefs [ptype].mat, col [0], col [1], col [2]);
331			fputc('\n', stdout);
332			}
333			printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2],
334			rad);
335	rschregle	2.13	fputc('\n', stdout);
336			}
337	rschregle	2.14	else /* Dump as XYZ RGB point */
338			printf(POINTFMT, p.pos [0], p.pos [1], p.pos [2],
339			col [0], col [1] ,col [2]);
340	rschregle	2.13	}
341	rschregle	2.14
342	rschregle	2.7	if (ferror(pmapFile) \|\| feof(pmapFile)) {
343	greg	2.1	sprintf(errmsg, "error reading %s", argv [arg]);
344			error(USER, errmsg);
345			}
346			}
347
348			fclose(pmapFile);
349
350			/* Reset defaults for next dump */
351			radScale = RADSCALE;
352			numSpheres = NSPHERES;
353	rschregle	2.14	col [0] = col [1] = col [2] = 0;
354			fluxCol = points = 0;
355	greg	2.1	}
356
357			return 0;
358			}