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root/radiance/ray/src/cv/ies2rad.c

Comparing ray/src/cv/ies2rad.c (file contents):
Revision 2.27 by greg, Sat Aug 1 23:27:04 2015 UTC vs.
Revision 2.28 by greg, Wed May 30 22:12:17 2018 UTC

#	Line 2 | Line 2
2		static const char       RCSid[] = "$Id$";
3		#endif
4		/*
5	<	* Convert IES luminaire data to Radiance description
5	>	* ies2rad -- Convert IES luminaire data to Radiance description
6		*
7	+	* ies2rad converts an IES LM-63 luminare description to a Radiance
8	+	* luminaire description.  In addition, ies2rad manages a local
9	+	* database of Radiance luminaire files.
10	+	*
11	+	* Ies2rad generates two or three files for each luminaire. For a
12	+	* luminaire named LUM, ies2rad will generate LUM.rad, a Radiance
13	+	* scene description file which describes the light source, LUM.dat,
14	+	* which contains the photometric data from the IES LM-63 file, and
15	+	* (if tilt data is provided) LUM%.dat, which contains the tilt data
16	+	* from the IES file.
17	+	*
18	+	* Ies2rad is supported by the Radiance function files source.cal and
19	+	* tilt.cal, which transform the coordinates in the IES data into
20	+	* Radiance (θ,φ) luminaire coordinates and then apply photometric and
21	+	* tilt data to generate Radiance light. θ is altitude from the
22	+	* negative z-axis and φ is azimuth from the positive x-axis,
23	+	* increasing towards the positive y-axis. [??? Greg, is there a
24	+	* source for this convention?] This system matches none of the usual
25	+	* goniophotometric conventions, but it is closest to IES type C; V in
26	+	* type C photometry is θ in Radiance and L is -φ.
27	+	*
28	+	* The ies2rad scene description for a luminaire LUM, with tilt data,
29	+	* uses the following Radiance scene description primitives:
30	+	*
31	+	*     void brightdata LUM_tilt
32	+	*     …
33	+	*     LUM_tilt brightdata LUM_dist
34	+	*     …
35	+	*     LUM_dist light LUM_light
36	+	*     …
37	+	*     LUM_light surface1 name1
38	+	*     …
39	+	*     LUM_light surface2 name2
40	+	*     …
41	+	*     LUM_light surface_n name_n
42	+	*
43	+	* Without tilt data, the primitives are:
44	+	*
45	+	*     void brightdata LUM_dist
46	+	*     …
47	+	*     LUM_dist light LUM_light
48	+	*     …
49	+	*     LUM_light surface1 name1
50	+	*     …
51	+	*     LUM_light surface2 name2
52	+	*     …
53	+	*     LUM_light surface_n name_n
54	+	*
55	+	* As many surfaces are given as required to describe the light
56	+	* source. Illum may be used rather than light so that a visible form
57	+	* (impostor) may be given to the luminaire, rather than a simple
58	+	* glowing shape. If an impostor is provided, it must be wholly
59	+	* contained within the illum and if it provides impostor light
60	+	* sources, those must be given with glow, so that they do not
61	+	* themselves illuminate the scene, providing incorrect results.
62	+	*
63	+	* The ies2rad code uses the "bsd" style. For emacs, this is set up
64	+	* automatically in the "Local Variables" section at the end of the
65	+	* file. For vim, use ":set tabstop=8 shiftwidth=8".
66	+	*
67		*      07Apr90         Greg Ward
68		*
69		*  Fixed correction factor for flat sources 29Oct2001 GW
70	+	*  Extensive comments added by Randolph Fritz May2018
71		*/
72
73		#include <stdio.h>
#	Line 20 | Line 81 | static const char      RCSid[] = "$Id$";
81		#include "paths.h"
82
83		#define PI              3.14159265358979323846
84	<	/* floating comparisons */
84	>
85	>	/* floating comparisons -- floating point numbers within FTINY of each
86	>	* other are considered equal */
87		#define FTINY           1e-6
88		#define FEQ(a,b)        ((a)<=(b)+FTINY&&(a)>=(b)-FTINY)
89	<	/* keywords */
89	>
90	>
91	>	/* IESNA LM-63 keywords and constants */
92	>	/* Since 1991, LM-63 files have begun with the magic keyword IESNA */
93		#define MAGICID         "IESNA"
94		#define LMAGICID        5
95	+	/* ies2rad supports the 1986, 1991, and 1995 versions of
96	+	* LM-63. FIRSTREV describes the first version; LASTREV describes the
97	+	* 1995 version. */
98		#define FIRSTREV        86
99		#define LASTREV         95
100
101	<	#define D86             0               /* keywords defined in LM-63-1986 */
101	>	/* The following definitions support LM-63 file keyword reading and
102	>	* analysis.
103	>	*
104	>	* This section defines two function-like macros: keymatch(i,s), which
105	>	* checks to see if keyword i matches string s, and checklamp(s),
106	>	* which checks to see if a string matches the keywords "LAMP" or
107	>	* "LAMPCAT".
108	>	*
109	>	* LM-63-1986 files begin with a list of free-form label lines.
110	>	* LM-63-1991 files begin with the identifying line "IESNA91" followed
111	>	* by a list of formatted keywords.  LM-63-1995 files begin with the
112	>	* identifying line "IESNA:LM-63-1995" followed by a list of formatted
113	>	* keywords.
114	>	*
115	>	* The K_* #defines enumerate the keywords used in the different
116	>	* versions of the file and give them symbolic names.
117	>	*
118	>	* The D86, D91, and D95 #defines validate the keywords in the 1986,
119	>	* 1991, and 1995 versions of the standard, one bit per keyword.
120	>	* Since the 1986 standard does not use keywords, D86 is zero.  The
121	>	* 1991 standard has 13 keywords, and D91 has the lower 13 bits set.
122	>	* The 1995 standard has 14 keywords, and D95 has the lower 14 bits
123	>	* set.
124	>	*
125	>	*/
126	>	#define D86             0
127
128		#define K_TST           0
129		#define K_MAN           1
#	Line 45 | Line 139 | static const char      RCSid[] = "$Id$";
139		#define K_BLK           11
140		#define K_EBK           12
141
142	<	#define D91             ((1L<<13)-1)    /* keywords defined in LM-63-1991 */
142	>	/* keywords defined in LM-63-1991 */
143	>	#define D91             ((1L<<13)-1)
144
145		#define K_LMG           13
146
147	<	#define D95             ((1L<<14)-1)    /* keywords defined in LM-63-1995 */
147	>	/* keywords defined in LM-63-1995 */
148	>	#define D95             ((1L<<14)-1)
149
150		char    k_kwd[][20] = {"TEST", "MANUFAC", "LUMCAT", "LUMINAIRE", "LAMPCAT",
151		"LAMP", "BALLAST", "MAINTCAT", "OTHER", "SEARCH",
#	Line 65 | Line 161 | int    filerev = FIRSTREV;
161		#define checklamp(s)    (!(k_defined[filerev-FIRSTREV]&(1<<K_LMP|1<<K_LPC)) ||\
162		keymatch(K_LMP,s) || keymatch(K_LPC,s))
163
164	<	/* tilt specs */
164	>	/* tilt specs
165	>	*
166	>	* This next series of definitions address metal-halide lamps, which
167	>	* change their brightness depending on the angle at which they are
168	>	* mounted. The section begins with "TILT=".  The constants in this
169	>	* section are all defined in LM-63.
170	>	*
171	>	*/
172	>
173		#define TLTSTR          "TILT="
174		#define TLTSTRLEN       5
175		#define TLTNONE         "NONE"
#	Line 73 | Line 177 | int    filerev = FIRSTREV;
177		#define TLT_VERT        1
178		#define TLT_H0          2
179		#define TLT_H90         3
180	<	/* photometric types */
180	>
181	>	/* Constants from LM-63 files */
182	>
183	>	/* photometric types
184	>	*
185	>	* This enumeration reflects three different methods of measuring the
186	>	* distribution of light from a luminaire -- "goniophotometry" -- and
187	>	* the different coordinate systems related to these
188	>	* goniophotometers.  All are described in IES standard LM-75-01.
189	>	* Earlier and shorter descriptions may be found the LM-63 standards
190	>	* from 1986, 1991, and 1995.
191	>	*
192	>	* ies2rad does not support type A photometry.
193	>	*
194	>	* In the 1986 file format, LM-63-86, 1 is used for type C and type A
195	>	* photometric data.
196	>	*
197	>	*/
198		#define PM_C            1
199		#define PM_B            2
200		#define PM_A            3
201	<	/* unit types */
201	>
202	>	/* unit types */
203		#define U_FEET          1
204		#define U_METERS        2
205	<	/* string lengths */
206	<	#define MAXLINE         132
205	>
206	>	/* string lengths */
207	>	/* Maximum input line is 132 characters including CR LF at end. */
208	>	#define MAXLINE         133
209		#define RMAXWORD        76
210	<	/* file types */
210	>
211	>	/* End of LM-63-related #defines */
212	>
213	>	/* file extensions */
214		#define T_RAD           ".rad"
215		#define T_DST           ".dat"
216		#define T_TLT           "%.dat"
217		#define T_OCT           ".oct"
218	<	/* shape types */
218	>
219	>	/* shape types
220	>	* These #defines enumerate the shapes of the Radiance objects which
221	>	* emit the light.
222	>	*/
223		#define RECT            1
224		#define DISK            2
225		#define SPHERE          3
226
227	<	#define MINDIM          .001            /* minimum dimension (point source) */
227	>	/* The diameter of a point source luminaire model. Also the minimum
228	>	* size (in meters) that the luminous opening of a luminaire must have
229	>	* to be treated as other than a point source. */
230	>	#define MINDIM          .001
231
232	<	#define F_M             .3048           /* feet to meters */
232	>	/* feet to meters */
233	>	/* length_in_meters = length_in_feet * F_M */
234	>	#define F_M             .3048
235
236	+	/* abspath - return true if a path begins with a directory separator
237	+	* or a '.' (current directory) */
238		#define abspath(p)      (ISDIRSEP((p)[0]) || (p)[0] == '.')
239
240	+	/* Global variables.
241	+	*
242	+	* Mostly, these are a way of communicating command line parameters to
243	+	* the rest of the program.
244	+	*/
245		static char     default_name[] = "default";
246
247		char    *libdir = NULL;                 /* library directory location */
#	Line 116 | Line 259 | int    out2stdout = 0;                 /* put out to stdout r.t. file *
259		int     instantiate = 0;                /* instantiate geometry */
260		double  illumrad = 0.0;                 /* radius for illum sphere */
261
262	+	/* This struct describes the Radiance source object */
263		typedef struct {
264		int     isillum;                        /* do as illum */
265		int     type;                           /* RECT, DISK, SPHERE */
#	Line 124 | Line 268 | typedef struct {
268		double  area;                           /* max. projected area */
269		} SRCINFO;                              /* a source shape (units=meters) */
270
271	<	int     gargc;                          /* global argc (minus filenames) */
271	>	/* A count and pointer to the list of input file names */
272	>	int     gargc;                          /* global argc */
273		char    **gargv;                        /* global argv */
274
275	<
275	>	/* macros to scan numbers out of IES files
276	>	*
277	>	* fp is a file pointer.  scnint() places the number in the integer
278	>	* indicated by ip; scnflt() places the number in the double indicated
279	>	* by rp. The macros return 1 if successful, 0 if not.
280	>	*
281	>	*/
282		#define scnint(fp,ip)   cvtint(ip,getword(fp))
283		#define scnflt(fp,rp)   cvtflt(rp,getword(fp))
133	–	#define isint           isflt                   /* IES allows real as integer */
284
285	+	/* The original (1986) version of LM-63 allows decimals points in
286	+	* integers, so that, for instance, the number of lamps may be written
287	+	* 3.0 (the number, obviously, must still be an integer.) This
288	+	* confusing define accommodates that.  */
289	+	#define isint           isflt
290
291	+	/* Function declarations */
292		static int ies2rad(char *inpname, char *outname);
293		static void initlamps(void);
294		static int dosource(SRCINFO *sinf, FILE *in, FILE *out, char *mod, char *name);
#	Line 160 | Line 316 | static char * libname(char *path, char *fname, char *s
316		static char * getword(FILE *fp);
317		static char * fullnam(char *path, char *fname, char *suffix);
318
319	<
319	>	/* main - process arguments and run the conversion
320	>	*
321	>	* Refer to the man page for details of the arguments.
322	>	*
323	>	* Following Unix environment conventions, main() exits with 0 on
324	>	* success and 1 on failure.
325	>	*
326	>	* ies2rad outputs either two or three files for a given IES
327	>	* file. There is always a .rad file containing Radiance scene
328	>	* description primitives and a .dat file for the photometric data. If
329	>	* tilt data is given, that is placed in a separate .dat file.  So
330	>	* ies2rad must have a filename to operate. Sometimes this name is the
331	>	* input file name, shorn of its extension; sometimes it is given in
332	>	* the -o option. But an output file name is required for ies2rad to
333	>	* do its work.
334	>	*
335	>	* Older versions of the LM-63 standard allowed inclusion of multiple
336	>	* luminaires in one IES file; this is not supported by ies2rad.
337	>	*
338	>	* This code sometimes does not check to make sure it has not run out
339	>	* of arguments; this can lead to segmentation faults and perhaps
340	>	* other errors.
341	>	*
342	>	*/
343		int
344		main(
345		int     argc,
#	Line 172 | Line 351 | main(
351		char    outname[RMAXWORD];
352		double  d1;
353		int     i;
354	<
354	>
355	>	/* Scan the options */
356		for (i = 1; i < argc && argv[i][0] == '-'; i++)
357		switch (argv[i][1]) {
358		case 'd':               /* dimensions */
#	Line 243 | Line 423 | main(
423		case 'i':               /* illum */
424		illumrad = atof(argv[++i]);
425		break;
426	<	case 'g':               /* instatiate geometry? */
426	>	case 'g':               /* instantiate geometry? */
427		instantiate = !instantiate;
428		break;
429		case 't':               /* override lamp type */
#	Line 266 | Line 446 | main(
446		argv[0], argv[i]);
447		exit(1);
448		}
449	+	/* Save pointers to the list of input file names */
450		gargc = i;
451		gargv = argv;
452	<	initlamps();                    /* get lamp data (if needed) */
453	<	/* convert ies file(s) */
452	>
453	>	/* get lamp data (if needed) */
454	>	initlamps();
455	>
456	>	/* convert ies file(s) */
457	>	/* If an output file name is specified */
458		if (outfile != NULL) {
459		if (i == argc)
460	+	/* If no input filename is given, use stdin as
461	+	* the source for the IES file */
462		exit(ies2rad(NULL, outfile) == 0 ? 0 : 1);
463		else if (i == argc-1)
464	+	/* If exactly one input file name is given, use it. */
465		exit(ies2rad(argv[i], outfile) == 0 ? 0 : 1);
466		else
467	<	goto needsingle;
467	>	goto needsingle; /* Otherwise, error. */
468		} else if (i >= argc) {
469	+	/* If an output file and an input file are not give, error. */
470		fprintf(stderr, "%s: missing output file specification\n",
471		argv[0]);
472		exit(1);
473		}
474	+	/* If no input or output file is given, error. */
475		if (out2stdout && i != argc-1)
476		goto needsingle;
477	+	/* Otherwise, process each input file in turn. */
478		status = 0;
479		for ( ; i < argc; i++) {
480		tailtrunc(strcpy(outname,filename(argv[i])));
#	Line 296 | Line 487 | needsingle:
487		exit(1);
488		}
489
490	+	/* Initlamps -- If necessary, read lamp data table */
491		void
492		initlamps(void)                         /* set up lamps */
493		{
494		float   *lcol;
495		int     status;
496
497	+	/* If the lamp name is set to default, don't bother to read
498	+	* the lamp data table. */
499		if (lamptype != NULL && !strcmp(lamptype, default_name) &&
500		deflamp == NULL)
501	<	return;                         /* no need for data */
502	<	/* else load file */
503	<	if ((status = loadlamps(lampdat)) < 0)
504	<	exit(1);
501	>	return;
502	>
503	>	if ((status = loadlamps(lampdat)) < 0) /* Load the lamp data table */
504	>	exit(1);                       /* Exit if problems
505	>	* with the file. */
506		if (status == 0) {
507	+	/* If can't open the file, just use the standard default lamp */
508		fprintf(stderr, "%s: warning - no lamp data\n", lampdat);
509		lamptype = default_name;
510		return;
511		}
512	<	if (deflamp != NULL) {                  /* match default type */
512	>	if (deflamp != NULL) {
513	>	/* Look up the specified default lamp type */
514		if ((lcol = matchlamp(deflamp)) == NULL)
515	+	/* If it can't be found, use the default */
516		fprintf(stderr,
517		"%s: warning - unknown default lamp type\n",
518		deflamp);
519		else
520	+	/* Use the selected default lamp color */
521		copycolor(defcolor, lcol);
522		}
523	<	if (lamptype != NULL) {                 /* match selected type */
523	>	/* If a lamp type is specified and can be found, use it, and
524	>	* release the lamp data table memory; it won't be needed any more. */
525	>	if (lamptype != NULL) {
526		if (strcmp(lamptype, default_name)) {
527		if ((lcol = matchlamp(lamptype)) == NULL) {
528		fprintf(stderr,
#	Line 333 | Line 534 | initlamps(void)                                /* set up lamps */
534		}
535		freelamps();                    /* all done with data */
536		}
537	<	/* else keep lamp data */
537	>	/* else keep lamp data */
538		}
539
540	+	/*
541	+	* File path operations
542	+	*
543	+	* These provide file path operations that operate on both MS-Windows
544	+	* and *nix. They will ignore and pass, but will not necessarily
545	+	* process correctly, Windows drive letters. Paths including Windows
546	+	* UNC network names (\\server\folder\file) may also cause problems.
547	+	*
548	+	*/
549
550	+	/*
551	+	* stradd()
552	+	*
553	+	* Add a string to the end of a string, optionally concatenating a
554	+	* file path separator character.  If the path already ends with a
555	+	* path separator, no additional separator is appended.
556	+	*
557	+	*/
558		char *
559		stradd(                 /* add a string at dst */
560		char    *dst,
#	Line 355 | Line 573 | stradd(                        /* add a string at dst */
573		return(dst);
574		}
575
576	<
576	>	/*
577	>	* fullnam () - return a usable path name for an output file
578	>	*/
579		char *
580	<	fullnam(                /* return full path name */
581	<	char    *path,
582	<	char    *fname,
583	<	char    *suffix
580	>	fullnam(
581	>	char    *path,          /* The base directory path */
582	>	char    *fname,         /* The file name */
583	>	char    *suffix         /* A suffix, which usually contains
584	>	* a file name extension. */
585		)
586		{
587	+	extern char *prefdir;
588	+	extern char *libdir;
589	+
590		if (prefdir != NULL && abspath(prefdir))
591	+	/* If the subdirectory path is absolute or '.', just
592	+	* concatenate the names together */
593		libname(path, fname, suffix);
594		else if (abspath(fname))
595	+	/* If there is no subdirectory, and the file name is
596	+	* an absolute path or '.', concatenate the path,
597	+	* filename, and suffix. */
598		strcpy(stradd(path, fname, 0), suffix);
599		else
600	+	/* If the file name is relative, concatenate path,
601	+	* library directory, directory separator, file name,
602	+	* and suffix.  */
603		libname(stradd(path, libdir, DIRSEP), fname, suffix);
604
605		return(path);
606		}
607
608
609	+	/*
610	+	* libname - convert a file name to a path
611	+	*/
612		char *
613	<	libname(                /* return library relative name */
614	<	char    *path,
615	<	char    *fname,
616	<	char    *suffix
613	>	libname(
614	>	char    *path,          /* The base directory path */
615	>	char    *fname,         /* The file name */
616	>	char    *suffix         /* A suffix, which usually contains
617	>	* a file name extension. */
618		)
619		{
620	+	extern char *prefdir;   /* The subdirectory where the file
621	+	* name is stored. */
622	+
623		if (abspath(fname))
624	+	/* If the file name begins with '/' or '.', combine
625	+	* it with the path and attach the suffix */
626		strcpy(stradd(path, fname, 0), suffix);
627		else
628	+	/* If the file name is relative, attach it to the
629	+	* path, include the subdirectory, and append the suffix. */
630		strcpy(stradd(stradd(path, prefdir, DIRSEP), fname, 0), suffix);
631
632		return(path);
633		}
634
635	<
635	>	/* filename - find the base file name in a buffer containing a path
636	>	*
637	>	* The pointer is to a character within the buffer, not a string in itself;
638	>	* it will become invalid when the buffer is freed.
639	>	*
640	>	*/
641		char *
642	<	filename(                       /* get final component of pathname */
642	>	filename(
643		char    *path
644		)
645		{
#	Line 404 | Line 652 | filename(                      /* get final component of pathname */
652		}
653
654
655	+	/* filetrunc() - return the directory portion of a path
656	+	*
657	+	* The path is passed in in a pointer to a buffer; a null character is
658	+	* inserted in the buffer after the last directory separator
659	+	*
660	+	*/
661		char *
662	<	filetrunc(                              /* truncate filename at end of path */
662	>	filetrunc(
663		char    *path
664		)
665		{
#	Line 420 | Line 674 | filetrunc(                             /* truncate filename at end of path */
674		return(path);
675		}
676
677	<
677	>	/* tailtrunc() - trim a file name extension, if any.
678	>	*
679	>	* The file name is passed in in a buffer indicated by *name; the
680	>	* period which begins the extension is replaced with a 0 byte.
681	>	*/
682		char *
683	<	tailtrunc(                              /* truncate tail of filename */
683	>	tailtrunc(
684		char    *name
685		)
686		{
687		char    *p1, *p2;
688
689	+	/* Skip leading periods */
690		for (p1 = filename(name); *p1 == '.'; p1++)
691		;
692	+	/* Find the last period in a file name */
693		p2 = NULL;
694		for ( ; *p1; p1++)
695		if (*p1 == '.')
696		p2 = p1;
697	+	/* If present, trim the filename at that period */
698		if (p2 != NULL)
699		*p2 = '\0';
700		return(name);
701		}
702
703	<
703	>	/* blanktrunc() - trim spaces at the end of a string
704	>	*
705	>	* the string is passed in a character array, which is modified
706	>	*/
707		void
708	<	blanktrunc(                             /* truncate spaces at end of line */
708	>	blanktrunc(
709		char    *s
710		)
711		{
#	Line 454 | Line 718 | blanktrunc(                            /* truncate spaces at end of line */
718		*++cp = '\0';
719		}
720
721	<
721	>	/* k_match - return true if keyword matches header line */
722		int
723	<	k_match(                        /* header line matches keyword? */
724	<	char    *kwd,
725	<	char    *hdl
723	>	k_match(
724	>	char    *kwd,           /* keyword */
725	>	char    *hdl            /* header line */
726		)
727		{
728	+	/* The line has to begin with '[' */
729		if (*hdl++ != '[')
730		return(0);
731	<	while (islower(*hdl) ? toupper(*hdl) == *kwd++ : *hdl == *kwd++)
731	>	/* case-independent keyword match */
732	>	while (toupper(*hdl) == *kwd++)
733		if (!*hdl++)
734		return(0);
735	+	/* If we have come to the end of the keyword, and the keyword
736	+	* at the beginning of the matched line is terminated with
737	+	* ']', return 1 */
738		return((!*kwd) & (*hdl == ']'));
739		}
740
741	<
741	>	/* keyargs - return the argument of a keyword, without leading spaces
742	>	*
743	>	* keyargs is passed a pointer to a buffer; it returns a pointer to
744	>	* where the argument starts in the buffer
745	>	*
746	>	*/
747		char *
748	<	keyargs(                                /* return keyword arguments */
749	<	char    *hdl
748	>	keyargs(
749	>	char    *hdl /* header line */
750		)
751		{
752		while (*hdl && *hdl++ != ']')
#	Line 483 | Line 757 | keyargs(                               /* return keyword arguments */
757		}
758
759
760	+	/* putheader - output the header of the .rad file
761	+	*
762	+	* Header is:
763	+	*   # <file> <file> <file> (all files from input line)
764	+	*   # Dimensions in [feet,meters,etc.]
765	+	*
766	+	* ??? Is listing all the input file names correct behavior?
767	+	*
768	+	*/
769		void
770	<	putheader(                              /* print header */
770	>
771	>	putheader(
772		FILE    *out
773		)
774		{
775		int     i;
776	<
776	>
777		putc('#', out);
778		for (i = 0; i < gargc; i++) {
779		putc(' ', out);
#	Line 500 | Line 784 | putheader(                             /* print header */
784		putc('\n', out);
785		}
786
787	<
787	>	/* ies2rad - convert an IES LM-63 file to a Radiance light source desc.
788	>	*
789	>	* Return -1 in case of failure, 0 in case of success.
790	>	*
791	>	* The file version recognition is confused and will treat 1995 and
792	>	* 2002 version files as 1986 version files.
793	>	*
794	>	*/
795		int
796		ies2rad(                /* convert IES file */
797		char    *inpname,
#	Line 513 | Line 804 | ies2rad(               /* convert IES file */
804		FILE    *inpfp, *outfp;
805		int     lineno = 0;
806
807	+	/* Open input and output files */
808		geomfile[0] = '\0';
809		srcinfo.isillum = 0;
810		if (inpname == NULL) {
#	Line 529 | Line 821 | ies2rad(               /* convert IES file */
821		fclose(inpfp);
822		return(-1);
823		}
824	+
825	+	/* Output the output file header */
826		putheader(outfp);
827	+
828	+	/* If the lamp type wasn't given on the command line, mark
829	+	* the lamp color as missing */
830		if (lamptype == NULL)
831		lampcolor = NULL;
832	+
833	+	/* Read the input file header, copying lines to the .rad file
834	+	* and looking for a lamp type. Stop at EOF or a line
835	+	* beginning with "TILT=". */
836		while (fgets(buf,sizeof(buf),inpfp) != NULL
837		&& strncmp(buf,TLTSTR,TLTSTRLEN)) {
838	<	blanktrunc(buf);
839	<	if (!buf[0])
838	>	blanktrunc(buf); /* Trim trailing spaces, CR, LF. */
839	>	if (!buf[0])     /* Skip blank lines */
840		continue;
841	<	if (!lineno++ && !strncmp(buf, MAGICID, LMAGICID)) {
841	>	/* increment the header line count, and check for the
842	>	* "TILT=" line that terminates the header */
843	>	if (!lineno++ && strncmp(buf, MAGICID, LMAGICID) == 0) {
844	>	/* This code doesn't work for LM-63-95 and
845	>	* LM-63-02 files and will instead default to
846	>	* LM-63-86. */
847		filerev = atoi(buf+LMAGICID);
848		if (filerev < FIRSTREV)
849		filerev = FIRSTREV;
850		else if (filerev > LASTREV)
851		filerev = LASTREV;
852		}
853	+	/* Output the header line as a comment in the .rad file. */
854		fputs("#<", outfp);
855		fputs(buf, outfp);
856		putc('\n', outfp);
857	+
858	+	/* If the header line is a keyword line (file version
859	+	* later than 1986 and begins with '['), check a lamp
860	+	* in the "[LAMP]" and "[LAMPCAT]" keyword lines;
861	+	* otherwise check all lines.  */
862		if (lampcolor == NULL && checklamp(buf))
863		lampcolor = matchlamp( buf[0] == '[' ?
864		keyargs(buf) : buf );
865	<	if (keymatch(K_LMG, buf)) {             /* geometry file */
865	>	/* Look for a materials and geometry file in the keywords. */
866	>	if (keymatch(K_LMG, buf)) {
867		strcpy(geomfile, inpname);
868		strcpy(filename(geomfile), keyargs(buf));
869		srcinfo.isillum = 1;
870		}
871		}
872	+
873	+	/* Done reading header information. If a lamp color still
874	+	* hasn't been found, print a warning and use the default
875	+	* color; if a lamp type hasn't been found, but a color has
876	+	* been specified, used the specified color. */
877		if (lampcolor == NULL) {
878		fprintf(stderr, "%s: warning - no lamp type\n", inpname);
879		fputs("# Unknown lamp type (used default)\n", outfp);
#	Line 563 | Line 881 | ies2rad(               /* convert IES file */
881		} else if (lamptype == NULL)
882		fprintf(outfp,"# CIE(x,y) = (%f,%f)\n# Depreciation = %.1f%%\n",
883		lampcolor[3], lampcolor[4], 100.*lampcolor[5]);
884	+	/* If the file ended before a "TILT=" line, that's an error. */
885		if (feof(inpfp)) {
886		fprintf(stderr, "%s: not in IES format\n", inpname);
887		goto readerr;
888		}
889	+
890	+	/* Process the tilt section of the file. */
891	+	/* Get the tilt file name, or the keyword "INCLUDE". */
892		atos(tltid, RMAXWORD, buf+TLTSTRLEN);
893		if (inpfp == stdin)
894		buf[0] = '\0';
895		else
896		filetrunc(strcpy(buf, inpname));
897	+	/* Process the tilt data. */
898		if (dotilt(inpfp, outfp, buf, tltid, outname, tltid) != 0) {
899		fprintf(stderr, "%s: bad tilt data\n", inpname);
900		goto readerr;
901		}
902	+
903	+	/* Process the luminaire data. */
904		if (dosource(&srcinfo, inpfp, outfp, tltid, outname) != 0) {
905		fprintf(stderr, "%s: bad luminaire data\n", inpname);
906		goto readerr;
907		}
908	+
909	+	/* Close the input file */
910		fclose(inpfp);
911	<	/* cvgeometry closes outfp */
911	>
912	>	/* Process an MGF file, if present. cvgeometry() closes outfp. */
913		if (cvgeometry(geomfile, &srcinfo, outname, outfp) != 0) {
914		fprintf(stderr, "%s: bad geometry file\n", geomfile);
915		return(-1);
916		}
917		return(0);
918	+
919		readerr:
920	+	/* If there is an error reading the file, close the input and
921	+	* .rad output files, and delete the .rad file, returning -1. */
922		fclose(inpfp);
923		fclose(outfp);
924		unlink(fullnam(buf,outname,T_RAD));
925		return(-1);
926		}
927
928	<
928	>	/* dotilt -- process tilt data
929	>	*
930	>	* Generate a brightdata primitive which describes the effect of
931	>	* luminaire tilt on luminaire output and return its identifier in tltid.
932	>	*
933	>	* Tilt data (if present) is given as a number 1, 2, or 3, which
934	>	* specifies the orientation of the lamp within the luminaire, a
935	>	* number, n, of (angle, multiplier) pairs, followed by n angles and n
936	>	* multipliers.
937	>	*
938	>	* returns 0 for success, -1 for error
939	>	*/
940		int
941	<	dotilt( /* convert tilt data */
941	>	dotilt(
942		FILE    *in,
943		FILE    *out,
944		char    *dir,
#	Line 610 | Line 952 | dotilt(        /* convert tilt data */
952		char    buf[PATH_MAX], tltname[RMAXWORD];
953		FILE    *datin, *datout;
954
955	+	/* Decide where the tilt data is; if the luminaire description
956	+	* doesn't have a tilt section, set the identifier to "void". */
957		if (!strcmp(tltspec, TLTNONE)) {
958	+	/* If the line is "TILT=NONE", set the input file
959	+	* pointer to NULL and the identifier to "void". */
960		datin = NULL;
961		strcpy(tltid, "void");
962		} else if (!strcmp(tltspec, TLTINCL)) {
963	+	/* If the line is "TILT=INCLUDE" use the main IES
964	+	* file as the source of tilt data. */
965		datin = in;
966		strcpy(tltname, dfltname);
967		} else {
968	+	/* If the line is "TILE=<filename>", use that file
969	+	* name as the source of tilt data. */
970		if (ISDIRSEP(tltspec[0]))
971		strcpy(buf, tltspec);
972		else
#	Line 627 | Line 977 | dotilt(        /* convert tilt data */
977		}
978		tailtrunc(strcpy(tltname,filename(tltspec)));
979		}
980	+	/* If tilt data is present, read, process, and output it. */
981		if (datin != NULL) {
982	+	/* Try to open the output file */
983		if ((datout = fopen(fullnam(buf,tltname,T_TLT),"w")) == NULL) {
984		perror(buf);
985		if (datin != in)
986		fclose(datin);
987		return(-1);
988		}
989	+	/* Try to copy the tilt data to the tilt data file */
990		if (!scnint(datin,&tlt_type) || !scnint(datin,&nangles)
991		|| cvdata(datin,datout,1,&nangles,1.,minmax) != 0) {
992		fprintf(stderr, "%s: data format error\n", tltspec);
#	Line 646 | Line 999 | dotilt(        /* convert tilt data */
999		fclose(datout);
1000		if (datin != in)
1001		fclose(datin);
1002	+
1003	+	/* Generate the identifier of the brightdata; the filename
1004	+	* with "_tilt" appended. */
1005		strcat(strcpy(tltid, filename(tltname)), "_tilt");
1006	+	/* Write out the brightdata primitive */
1007		fprintf(out, "\nvoid brightdata %s\n", tltid);
1008		libname(buf,tltname,T_TLT);
1009	+	/* Generate the tilt description */
1010		switch (tlt_type) {
1011	<	case TLT_VERT:                  /* vertical */
1011	>	case TLT_VERT:
1012	>	/* The lamp is mounted vertically; either
1013	>	* base up or base down. */
1014		fprintf(out, "4 noop %s tilt.cal %s\n", buf,
1015		minmax[0][1]>90.+FTINY ? "tilt_ang" : "tilt_ang2");
1016		break;
1017	<	case TLT_H0:                    /* horiz. in 0 deg. plane */
1017	>	case TLT_H0:
1018	>	/* The lamp is mounted horizontally and
1019	>	* rotates but does not tilt when the
1020	>	* luminaire is tilted. */
1021		fprintf(out, "6 noop %s tilt.cal %s -rz 90\n", buf,
1022		minmax[0][1]>90.+FTINY ? "tilt_xang" : "tilt_xang2");
1023		break;
1024		case TLT_H90:
1025	+	/* The lamp is mounted horizontally, and
1026	+	* tilts when the luminaire is tilted. */
1027		fprintf(out, "4 noop %s tilt.cal %s\n", buf,
1028		minmax[0][1]>90.+FTINY ? "tilt_xang" : "tilt_xang2");
1029		break;
1030		default:
1031	+	/* otherwise, this is a bad IES file */
1032		fprintf(stderr,
1033		"%s: illegal lamp to luminaire geometry (%d)\n",
1034		tltspec, tlt_type);
1035		return(-1);
1036		}
1037	+	/* And finally output the numbers of integer and real
1038	+	* arguments, of which there are none. */
1039		fprintf(out, "0\n0\n");
1040		}
1041		return(0);
1042		}
1043
1044	<
1044	>	/* dosource -- create the source and distribution primitives */
1045		int
1046	<	dosource(       /* create source and distribution */
1046	>	dosource(
1047		SRCINFO *sinf,
1048		FILE    *in,
1049		FILE    *out,
#	Line 689 | Line 1057 | dosource(      /* create source and distribution */
1057		double  bounds[2][2];
1058		int     nangles[2], pmtype, unitype;
1059		double  d1;
1060	<	int     doupper, dolower, dosides;
1060	>	int     doupper, dolower, dosides;
1061
1062	+	/* Read in the luminaire description header */
1063		if (!isint(getword(in)) || !isflt(getword(in)) || !scnflt(in,&mult)
1064		|| !scnint(in,&nangles[0]) || !scnint(in,&nangles[1])
1065		|| !scnint(in,&pmtype) || !scnint(in,&unitype)
#	Line 700 | Line 1069 | dosource(      /* create source and distribution */
1069		fprintf(stderr, "dosource: bad lamp specification\n");
1070		return(-1);
1071		}
1072	+	/* Type A photometry is not supported */
1073		if (pmtype != PM_C && pmtype != PM_B) {
1074		fprintf(stderr, "dosource: unsupported photometric type (%d)\n",
1075		pmtype);
1076		return(-1);
1077		}
1078	+
1079	+	/* Multiplier = the multiplier from the -m option, times the
1080	+	* multiplier from the IES file, times the ballast factor,
1081	+	* times the "ballast lamp photometric factor," which was part
1082	+	* of the 1986 and 1991 standards. In the 1995 standard, it is
1083	+	* always supposed to be 1. */
1084		sinf->mult = multiplier*mult*bfactor*pfactor;
1085	+
1086	+	/* If the count of angles is wrong, raise an error and quit. */
1087		if (nangles[0] < 2 || nangles[1] < 1) {
1088		fprintf(stderr, "dosource: too few measured angles\n");
1089		return(-1);
1090		}
1091	+
1092	+	/* For internal computation, convert units to meters. */
1093		if (unitype == U_FEET) {
1094		width *= F_M;
1095		length *= F_M;
1096		height *= F_M;
1097		}
1098	+
1099	+	/* Make decisions about the shape of the light source
1100	+	* geometry, and store them in sinf. */
1101		if (makeshape(sinf, width, length, height) != 0) {
1102		fprintf(stderr, "dosource: illegal source dimensions");
1103		return(-1);
1104		}
1105	+
1106	+	/* Copy the candela values into a Radiance data file. */
1107		if ((datout = fopen(fullnam(buf,name,T_DST), "w")) == NULL) {
1108		perror(buf);
1109		return(-1);
#	Line 730 | Line 1115 | dosource(      /* create source and distribution */
1115		return(-1);
1116		}
1117		fclose(datout);
1118	+
1119	+	/* Output explanatory comment */
1120		fprintf(out, "# %g watt luminaire, lamp*ballast factor = %g\n",
1121		wattage, bfactor*pfactor);
1122	+	/* Output distribution "brightdata" primitive. Start handling
1123	+	the various cases of symmetry of the distribution. */
1124		strcat(strcpy(id, filename(name)), "_dist");
1125		fprintf(out, "\n%s brightdata %s\n", mod, id);
1126		if (nangles[1] < 2)
#	Line 742 | Line 1131 | dosource(      /* create source and distribution */
1131		fprintf(out, "7 ");
1132		else
1133		fprintf(out, "5 ");
1134	<	dolower = (bounds[0][0] < 90.-FTINY);
1135	<	doupper = (bounds[0][1] > 90.+FTINY);
1136	<	dosides = (doupper & dolower && sinf->h > MINDIM);
1134	>
1135	>	/* If the generated source geometry will be a box, a flat
1136	>	* rectangle, or a disk figure out if it needs a top, a
1137	>	* bottom, and/or sides. */
1138	>	dolower = (bounds[0][0] < 90.-FTINY); /* Bottom */
1139	>	doupper = (bounds[0][1] > 90.+FTINY); /* Top */
1140	>	dosides = (doupper & dolower && sinf->h > MINDIM); /* Sides */
1141	>
1142	>	/* Select the appropriate function and parameters from source.cal */
1143		fprintf(out, "%s %s source.cal ",
1144		sinf->type==SPHERE ? "corr" :
1145		!dosides ? "flatcorr" :
#	Line 774 | Line 1169 | dosource(      /* create source and distribution */
1169		} else
1170		fprintf(out, "src_theta ");
1171		}
1172	+	/* finish the brightdata primitive with appropriate data */
1173		if (!dosides || sinf->type == SPHERE)
1174		fprintf(out, "\n0\n1 %g\n", sinf->mult/sinf->area);
1175		else if (sinf->type == DISK)
#	Line 782 | Line 1178 | dosource(      /* create source and distribution */
1178		else
1179		fprintf(out, "\n0\n4 %g %g %g %g\n", sinf->mult,
1180		sinf->l, sinf->w, sinf->h);
1181	+	/* Brightdata primitive written out. */
1182	+
1183	+	/* Finally, output the descriptions of the actual radiant
1184	+	* surfaces. */
1185		if (putsource(sinf, out, id, filename(name),
1186		dolower, doupper, dosides) != 0)
1187		return(-1);
1188		return(0);
1189		}
1190
1191	<
1191	>	/* putsource - output the actual light emitting geometry
1192	>	*
1193	>	* Three kinds of geometry are produced: rectangles and boxes, disks
1194	>	* ("ring" primitive, but the radius of the hole is always zero) and
1195	>	* cylinders, and spheres.
1196	>	*/
1197		int
1198	<	putsource( /* put out source */
1198	>	putsource(
1199		SRCINFO *shp,
1200		FILE    *fp,
1201		char    *mod,
1202		char    *name,
1203		int     dolower,
1204		int     doupper,
1205	<	int dosides
1205	>	int     dosides
1206		)
1207		{
1208		char    lname[RMAXWORD];
1209	<
1209	>
1210	>	/* First, describe the light. If a materials and geometry
1211	>	* file is given, generate an illum instead. */
1212		strcat(strcpy(lname, name), "_light");
1213		fprintf(fp, "\n%s %s %s\n", mod,
1214		shp->isillum ? "illum" : "light", lname);
#	Line 809 | Line 1216 | putsource( /* put out source */
1216		lampcolor[0], lampcolor[1], lampcolor[2]);
1217		switch (shp->type) {
1218		case RECT:
1219	+	/* Output at least one rectangle. If light is radiated
1220	+	* from the sides of the luminaire, output rectangular
1221	+	* sides as well. */
1222		if (dolower)
1223		putrectsrc(shp, fp, lname, name, 0);
1224		if (doupper)
#	Line 817 | Line 1227 | putsource( /* put out source */
1227		putsides(shp, fp, lname, name);
1228		break;
1229		case DISK:
1230	+	/* Output at least one disk. If light is radiated from
1231	+	* the sides of luminaire, output a cylinder as well. */
1232		if (dolower)
1233		putdisksrc(shp, fp, lname, name, 0);
1234		if (doupper)
#	Line 825 | Line 1237 | putsource( /* put out source */
1237		putcyl(shp, fp, lname, name);
1238		break;
1239		case SPHERE:
1240	+	/* Output a sphere. */
1241		putspheresrc(shp, fp, lname, name);
1242		break;
1243		}
1244		return(0);
1245		}
1246
1247	<
1247	>	/* makeshape -- decide what shape will be used
1248	>	*
1249	>	* makeshape decides what Radiance geometry will be used to represent
1250	>	* the light source and stores information about it in shp.
1251	>	*/
1252		int
1253	<	makeshape(              /* make source shape */
1253	>	makeshape(
1254		SRCINFO *shp,
1255		double  width,
1256		double  length,
1257		double  height
1258		)
1259		{
1260	+	/* Categorize the shape */
1261		if (illumrad/meters2out >= MINDIM/2.) {
1262	+	/* If the -i command line option is used, and the
1263	+	* object is not a point source, output an "illum"
1264	+	* sphere */
1265		shp->isillum = 1;
1266		shp->type = SPHERE;
1267		shp->w = shp->l = shp->h = 2.*illumrad / meters2out;
1268		} else if (width < MINDIM) {
1269	+	/* The width is either zero or negative. */
1270		width = -width;
1271		if (width < MINDIM) {
1272	+	/* The width is zero. Use a tiny sphere to
1273	+	* represent a point source. */
1274		shp->type = SPHERE;
1275		shp->w = shp->l = shp->h = MINDIM;
1276		} else if (height < .5*width) {
1277	+	/* The width is negative and the height is
1278	+	* modest; output either a disk or a thin
1279	+	* vertical cylinder. */
1280		shp->type = DISK;
1281		shp->w = shp->l = width;
1282		if (height >= MINDIM)
#	Line 857 | Line 1284 | makeshape(             /* make source shape */
1284		else
1285		shp->h = .5*MINDIM;
1286		} else {
1287	+	/* The width is negative and the object is
1288	+	* tall; output a sphere. */
1289		shp->type = SPHERE;
1290		shp->w = shp->l = shp->h = width;
1291		}
1292		} else {
1293	+	/* The width is positive. Output a box, possibly very
1294	+	* thin. */
1295		shp->type = RECT;
1296		shp->w = width;
1297		if (length >= MINDIM)
#	Line 872 | Line 1303 | makeshape(             /* make source shape */
1303		else
1304		shp->h = .5*MINDIM;
1305		}
1306	+
1307	+	/* Done choosing the shape; calculate its area in the x-y plane. */
1308		switch (shp->type) {
1309		case RECT:
1310		shp->area = shp->w * shp->l;
#	Line 884 | Line 1317 | makeshape(             /* make source shape */
1317		return(0);
1318		}
1319
1320	+	/* Rectangular or box-shaped light source.
1321	+	*
1322	+	* putrectsrc, putsides, putrect, and putpoint are used to output the
1323	+	* Radiance description of a box.  The box is centered on the origin
1324	+	* and has the dimensions given in the IES file.  The coordinates
1325	+	* range from [-1/2*length, -1/2*width, -1/2*height] to [1/2*length,
1326	+	* 1/2*width, 1/2*height].
1327	+	*
1328	+	* The location of the point is encoded in the low-order three bits of
1329	+	* an integer. If the integer is p, then: bit 0 is (p & 1),
1330	+	* representing length (x), bit 1 is (p & 2) representing width (y),
1331	+	* and bit 2 is (p & 4), representing height (z).
1332	+	*
1333	+	* Looking down from above (towards -z), the vertices of the box or
1334	+	* rectangle are numbered so:
1335	+	*
1336	+	*     2,6                                        3,7
1337	+	*        +--------------------------------------+
1338	+	*        |                                      |
1339	+	*        |                                      |
1340	+	*        |                                      |
1341	+	*        |                                      |
1342	+	*        +--------------------------------------+
1343	+	*     0,4                                        1,5
1344	+	*
1345	+	* The higher number of each pair is above the x-y plane (positive z),
1346	+	* the lower number is below the x-y plane (negative z.)
1347	+	*
1348	+	*/
1349
1350	+	/* putrecsrc - output a rectangle parallel to the x-y plane
1351	+	*
1352	+	* Putrecsrc calls out the vertices of a rectangle parallel to the x-y
1353	+	* plane.  The order of the vertices is different for the upper and
1354	+	* lower rectangles of a box, since a right-hand rule based on the
1355	+	* order of the vertices is used to determine the surface normal of
1356	+	* the rectangle, and the surface normal determines the direction the
1357	+	* light radiated by the rectangle.
1358	+	*
1359	+	*/
1360		void
1361	<	putrectsrc(             /* rectangular source */
1361	>	putrectsrc(
1362		SRCINFO *shp,
1363		FILE    *fp,
1364		char    *mod,
#	Line 900 | Line 1372 | putrectsrc(            /* rectangular source */
1372		putrect(shp, fp, mod, name, ".d", 0, 2, 3, 1);
1373		}
1374
1375	<
1375	>	/* putsides - put out sides of box */
1376		void
1377	<	putsides(                       /* put out sides of box */
1377	>	putsides(
1378		SRCINFO *shp,
1379		FILE    *fp,
1380		char    *mod,
#	Line 914 | Line 1386 | putsides(                      /* put out sides of box */
1386		putrect(shp, fp, mod, name, ".3", 3, 2, 6, 7);
1387		putrect(shp, fp, mod, name, ".4", 2, 0, 4, 6);
1388		}
917	–
1389
1390	+	/* putrect - put out a rectangle
1391	+	*
1392	+	* putrect generates the "polygon" primitive which describes a
1393	+	* rectangle.
1394	+	*/
1395		void
1396	<	putrect(        /* put out a rectangle */
1396	>	putrect(
1397		SRCINFO *shp,
1398		FILE    *fp,
1399		char    *mod,
#	Line 936 | Line 1412 | putrect(       /* put out a rectangle */
1412		putpoint(shp, fp, d);
1413		}
1414
1415	<
1415	>	/* putpoint -- output a the coordinates of a vertex
1416	>	*
1417	>	* putpoint maps vertex numbers to coordinates and outputs the
1418	>	* coordinates.
1419	>	*/
1420		void
1421	<	putpoint(                               /* put out a point */
1421	>	putpoint(
1422		SRCINFO *shp,
1423		FILE    *fp,
1424		int     p
#	Line 952 | Line 1432 | putpoint(                              /* put out a point */
1432		mult[p>>2]*shp->h*meters2out);
1433		}
1434
1435	+	/* End of routines to output a box-shaped light source */
1436
1437	+	/* Routines to output a cylindrical or disk shaped light source
1438	+	*
1439	+	* As with other shapes, the light source is centered on the origin.
1440	+	* The "ring" and "cylinder" primitives are used.
1441	+	*
1442	+	*/
1443		void
1444		putdisksrc(             /* put out a disk source */
1445		SRCINFO *shp,
#	Line 993 | Line 1480 | putcyl(                        /* put out a cylinder */
1480		fprintf(fp, "\t%g\n", .5*shp->w*meters2out);
1481		}
1482
1483	+	/* end of of routines to output cylinders and disks */
1484
1485		void
1486		putspheresrc(           /* put out a sphere source */
#	Line 1006 | Line 1494 | putspheresrc(          /* put out a sphere source */
1494		fprintf(fp, "0\n0\n4 0 0 0 %g\n", .5*shp->w*meters2out);
1495		}
1496
1497	<
1497	>	/* cvdata - convert LM-63 tilt and candela data to Radiance brightdata format
1498	>	*
1499	>	* The files created by this routine are intended for use with the Radiance
1500	>	* "brightdata" material type.
1501	>	*
1502	>	* Two types of data are converted; one-dimensional tilt data, which
1503	>	* is given in polar coordinates, and two-dimensional candela data,
1504	>	* which is given in spherical co-ordinates.
1505	>	*
1506	>	* Return 0 for success, -1 for failure.
1507	>	*
1508	>	*/
1509		int
1510	<	cvdata(         /* convert data */
1511	<	FILE    *in,
1512	<	FILE    *out,
1513	<	int     ndim,
1514	<	int     npts[],
1515	<	double  mult,
1516	<	double  lim[][2]
1510	>	cvdata(
1511	>	FILE    *in,            /* Input file */
1512	>	FILE    *out,           /* Output file */
1513	>	int     ndim,           /* Number of dimensions; 1 for
1514	>	* tilt data, 2 for photometric data. */
1515	>	int     npts[],         /* Number of points in each dimension */
1516	>	double  mult,           /* Multiple each value by this
1517	>	* number. For tilt data, always
1518	>	* 1. For candela values, the
1519	>	* efficacy of white Radiance light.  */
1520	>	double  lim[][2]        /* The range of angles in each dimension. */
1521		)
1522		{
1523	<	double  *pt[4];
1523	>	double  *pt[4];         /* Four is the expected maximum of ndim. */
1524		int     i, j;
1525		double  val;
1526		int     total;
1527
1528	+	/* Calculate and output the number of data values */
1529		total = 1; j = 0;
1530		for (i = 0; i < ndim; i++)
1531		if (npts[i] > 1) {
#	Line 1029 | Line 1533 | cvdata(                /* convert data */
1533		j++;
1534		}
1535		fprintf(out, "%d\n", j);
1536	<	/* get coordinates */
1536	>
1537	>	/* Read in the angle values, and note the first and last in
1538	>	* each dimension, if there is a place to store them. In the
1539	>	* case of tilt data, there is only one list of angles. In the
1540	>	* case of candela values, vertical angles appear first, and
1541	>	* horizontal angles occur second. */
1542		for (i = 0; i < ndim; i++) {
1543	+	/* Allocate space for the angle values. */
1544		pt[i] = (double *)malloc(npts[i]*sizeof(double));
1545		for (j = 0; j < npts[i]; j++)
1546		if (!scnflt(in, &pt[i][j]))
#	Line 1040 | Line 1550 | cvdata(                /* convert data */
1550		lim[i][1] = pt[i][npts[i]-1];
1551		}
1552		}
1553	<	/* write out in reverse */
1553	>
1554	>	/* Output the angles. If this is candela data, horizontal
1555	>	* angles output first. There are two cases: the first where
1556	>	* the angles are evenly spaced, the second where they are
1557	>	* not.
1558	>	*
1559	>	* When the angles are evenly spaced, three numbers are
1560	>	* output: the first angle, the last angle, and the number of
1561	>	* angles.  When the angles are not evenly spaced, instead
1562	>	* zero, zero, and the count of angles is given, followed by a
1563	>	* list of angles.  In this case, angles are output four to a line.
1564	>	*/
1565		for (i = ndim-1; i >= 0; i--) {
1566		if (npts[i] > 1) {
1567	+	/* Determine if the angles are evenly spaces */
1568		for (j = 1; j < npts[i]-1; j++)
1569		if (!FEQ(pt[i][j]-pt[i][j-1],
1570		pt[i][j+1]-pt[i][j]))
1571		break;
1572	+	/* If they are, output the first angle, the
1573	+	* last angle, and a count */
1574		if (j == npts[i]-1)
1575		fprintf(out, "%g %g %d\n", pt[i][0], pt[i][j],
1576		npts[i]);
1577		else {
1578	+	/* otherwise, output 0, 0, and a
1579	+	* count, followed by the list of
1580	+	* angles, one to a line. */
1581		fprintf(out, "0 0 %d", npts[i]);
1582		for (j = 0; j < npts[i]; j++) {
1583		if (j%4 == 0)
#	Line 1060 | Line 1587 | cvdata(                /* convert data */
1587		putc('\n', out);
1588		}
1589		}
1590	+	/* Free the storage containing the angle values. */
1591		free((void *)pt[i]);
1592		}
1593	+
1594	+	/* Finally, read in the data values (candela or multiplier values,
1595	+	* depending on the part of the file) and output them four to
1596	+	* a line. */
1597		for (i = 0; i < total; i++) {
1598		if (i%4 == 0)
1599		putc('\n', out);
#	Line 1073 | Line 1605 | cvdata(                /* convert data */
1605		return(0);
1606		}
1607
1608	<
1608	>	/* getword - get an LM-63 delimited word from fp
1609	>	*
1610	>	* Getword gets a word from an IES file delimited by either white
1611	>	* space or a comma surrounded by white space. A pointer to the word
1612	>	* is returned, which will persist only until getword is called again.
1613	>	* At EOF, return NULL instead.
1614	>	*
1615	>	*/
1616		char *
1617		getword(                        /* scan a word from fp */
1618		FILE    *fp
#	Line 1083 | Line 1622 | getword(                       /* scan a word from fp */
1622		char    *cp;
1623		int     c;
1624
1625	+	/* Skip initial spaces */
1626		while (isspace(c=getc(fp)))
1627		;
1628	+	/* Get characters to a delimiter or until wrd is full */
1629		for (cp = wrd; c != EOF && cp < wrd+RMAXWORD-1;
1630		*cp++ = c, c = getc(fp))
1631		if (isspace(c) || c == ',') {
1632	+	/* If we find a delimiter */
1633	+	/* Gobble up whitespace */
1634		while (isspace(c))
1635		c = getc(fp);
1636	+	/* If it's not a comma, put the first
1637	+	* character of the next data item back */
1638		if ((c != EOF) & (c != ','))
1639		ungetc(c, fp);
1640	+	/* Close out the strimg */
1641		*cp = '\0';
1642	+	/* return it */
1643		return(wrd);
1644		}
1645	+	/* If we ran out of space or are at the end of the file,
1646	+	* return either the word or NULL, as appropriate. */
1647		*cp = '\0';
1648		return(cp > wrd ? wrd : NULL);
1649		}
1650
1651	<
1651	>	/* cvtint - convert an IES word to an integer
1652	>	*
1653	>	* A pointer to the word is passed in wrd; ip is expected to point to
1654	>	* an integer.  cvtint() will silently truncate a floating point value
1655	>	* to an integer; "1", "1.0", and "1.5" will all return 1.
1656	>	*
1657	>	* cvtint() returns 0 if it fails, 1 if it succeeds.
1658	>	*/
1659		int
1660	<	cvtint(                 /* convert a word to an integer */
1660	>	cvtint(
1661		int     *ip,
1662		char    *wrd
1663		)
#	Line 1113 | Line 1669 | cvtint(                        /* convert a word to an integer */
1669		}
1670
1671
1672	+	/* cvtflt - convert an IES word to a double precision floating-point number
1673	+	*
1674	+	* A pointer to the word is passed in wrd; rp is expected to point to
1675	+	* a double.
1676	+	*
1677	+	* cvtflt returns 0 if it fails, 1 if it succeeds.
1678	+	*/
1679		int
1680	<	cvtflt(                 /* convert a word to a double */
1680	>	cvtflt(
1681		double  *rp,
1682		char    *wrd
1683		)
#	Line 1125 | Line 1688 | cvtflt(                        /* convert a word to a double */
1688		return(1);
1689		}
1690
1691	<
1691	>	/* cvgeometry - process materials and geometry format luminaire data
1692	>	*
1693	>	* The materials and geometry format (MGF) for describing luminaires
1694	>	* was a part of Radiance that was first adopted and then retracted by
1695	>	* the IES as part of LM-63.  It provides a way of describing
1696	>	* luminaire geometry similar to the Radiance scene description
1697	>	* format.
1698	>	*
1699	>	* cvgeometry() generates an mgf2rad command and then, if "-g" is given
1700	>	* on the command line, an oconv command, both of which are then
1701	>	* executed with the system() function.
1702	>	*
1703	>	* The generated commands are:
1704	>	*   mgf2rad -e <multiplier> -g <size> <mgf_filename> \
1705	>	*     | xform -s <scale_factor> \
1706	>	*     >> <luminare_scene_description_file
1707	>	* or:
1708	>	*   mgf2rad -e <multiplier> -g <size> <mgf_filename> \
1709	>	*     oconv - > <instance_filename>
1710	>	*/
1711		int
1712		cvgeometry(
1713		char    *inpname,
#	Line 1145 | Line 1727 | cvgeometry(
1727		strcpy(buf, "mgf2rad ");                /* build mgf2rad command */
1728		cp = buf+8;
1729		if (!FEQ(sinf->mult, 1.0)) {
1730	+	/* if there's an output multiplier, include in the
1731	+	* mgf2rad command */
1732		sprintf(cp, "-e %f ", sinf->mult);
1733		cp += strlen(cp);
1734		}
1735	+	/* Include the glow distance for the geometry */
1736		sprintf(cp, "-g %f %s ",
1737		sqrt(sinf->w*sinf->w + sinf->h*sinf->h + sinf->l*sinf->l),
1738		inpname);
1739		cp += strlen(cp);
1740		if (instantiate) {              /* instantiate octree */
1741	+	/* If "-g" is given on the command line, include an
1742	+	* "oconv" command in the pipe. */
1743		strcpy(cp, "| oconv - > ");
1744		cp += 12;
1745		fullnam(cp,outname,T_OCT);
1746	+	/* Only update if the input file is newer than the
1747	+	* output file */
1748		if (fdate(inpname) > fdate(outname) &&
1749		system(buf)) {          /* create octree */
1750		fclose(outfp);
1751		return(-1);
1752		}
1753	+	/* Reference the instance file in the scene description */
1754		fprintf(outfp, "void instance %s_inst\n", outname);
1755	+	/* If the geometry isn't in meters, scale it appropriately. */
1756		if (!FEQ(meters2out, 1.0))
1757		fprintf(outfp, "3 %s -s %f\n",
1758		libname(buf,outname,T_OCT),
1759		meters2out);
1760		else
1761		fprintf(outfp, "1 %s\n", libname(buf,outname,T_OCT));
1762	+	/* Close off the "instance" primitive. */
1763		fprintf(outfp, "0\n0\n");
1764	+	/* And the Radiance scene description. */
1765		fclose(outfp);
1766		} else {                        /* else append to luminaire file */
1767		if (!FEQ(meters2out, 1.0)) {    /* apply scalefactor */
#	Line 1186 | Line 1779 | cvgeometry(
1779		}
1780		return(0);
1781		}
1782	+
1783	+	/* Set up emacs indentation */
1784	+	/* Local Variables: */
1785	+	/*   c-file-style: "bsd" */
1786	+	/* End: */
1787	+
1788	+	/* For vim, use ":set tabstop=8 shiftwidth=8" */

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