[ViewVC] Diff of: radiance/ray/src/cv/ies2rad.c

Comparing ray/src/cv/ies2rad.c (file contents):
Revision 2.34 by greg, Thu Sep 30 20:05:09 2021 UTC vs.
Revision 2.35 by greg, Mon Nov 29 16:07:36 2021 UTC

#	Line 59 \| Line 59 \| static const char RCSid[] = "$Id$";
59		* sources, those must be given with glow, so that they do not
60		* themselves illuminate the scene, providing incorrect results.
61		*
62	+	* Overview of the LM-63 file format
63	+	* =================================
64	+	* Here we offer a summary of the IESNA LM-63 photometry file format
65	+	* for the perplexed reader. Dear reader, do remember that this is
66	+	* our interpretation of the five different versions of the standard.
67	+	* When our interpretation of the standard conflicts with the official
68	+	* standard, the official document is to be respected. In conflicts
69	+	* with practice, do take into account the robustness principle and be
70	+	* permissive, accepting reasonable deviations from the standard.
71	+	*
72	+	* LM-63 files are organized as a version tag, followed by a series of
73	+	* luminaire data sets. The luminaire data sets, in turn, are
74	+	* organized into a label, a tilt data section, and a photometric data
75	+	* section. Finally, the data sections are organized into records,
76	+	* which are made up of lines of numeric values delimited by spaces or
77	+	* commas. Lines are delimited by CR LF sequences. Records are made
78	+	* up of one or more lines, and every record must be made up of some
79	+	* number of complete lines, but there is no delimiter which makes the
80	+	* end of a record. The first records of the tilt and photometric
81	+	* data sections have fixed numbers of numeric values; the initial
82	+	* records contain counts that describe the remaining records.
83	+	*
84	+	* Ies2rad allows only one luminaire data set per file.
85	+	*
86	+	* The tilt section is made up of exactly four records; the second gives
87	+	* the number of values in the third and fourth records.
88	+	*
89	+	* The photometric section begins with two records, which give both the
90	+	* number of records following and the number of values in each of the
91	+	* following records.
92	+	*
93	+	* The original 1986 version of LM-63 does not have a version tag.
94	+	*
95	+	* The 1986, 1991, and 1995 versions allow 80 characters for the label
96	+	* lines and the "TILT=" line which begins the tilt data section, and
97	+	* 132 characters thereafter. (Those counts do not include the CR LF
98	+	* line terminator.) The 2002 version dispenses with those limits,
99	+	* allowing 256 characters per line, including the CR LF line
100	+	* terminator. The 2019 version does not specify a line length at
101	+	* all. Ies2rad allows lines of up to 256 characters and will accept
102	+	* CR LF or LF alone as line terminators.
103	+	*
104	+	* In the 1986 version, the label is a series of free-form lines of up
105	+	* to 80 characters. In later versions, the label is a series of
106	+	* lines of beginning with keywords in brackets with interpretation
107	+	* rules which differ between versions.
108	+	*
109	+	* The tilt data section begins with a line beginning with "TILT=",
110	+	* optionally followed by either a file name or four records of
111	+	* numerical data. The 2019 version no longer allows a file name to
112	+	* be given.
113	+	*
114	+	* The main photometric data section contains two header records
115	+	* followed by a record of vertical angles, a record of horizontal
116	+	* angles, and one record of candela values for each horizontal angle.
117	+	* Each record of candela values contains exactly one value for each
118	+	* vertical angle. Data values in records are separated by spaces or
119	+	* commas. In keeping with the robustness principle, commas
120	+	* surrounded by spaces will also be accepted as separators.
121	+	*
122	+	* The first header record of the photometric data section contains
123	+	* exactly 10 values. The second contains exactly 3 values. Most of
124	+	* the data values are floating point numbers; the exceptions are
125	+	* various counts and enumerators, which are integers: the number of
126	+	* lamps, the numbers of vertical and horizontal angles, the
127	+	* photometric type identifier, and the units type identifier. In the
128	+	* 2019 version, a field with information about how the file was
129	+	* generated has replaced a field unused since 1995; it is a textual
130	+	* representation of a bit string, but may - we hope! - safely be
131	+	* interpreted as a floating point number and decoded later.
132	+	*
133	+	* Style Note
134	+	* ==========
135		* The ies2rad code uses the "bsd" style. For emacs, this is set up
136		* automatically in the "Local Variables" section at the end of the
137		* file. For vim, use ":set tabstop=8 shiftwidth=8".
138		*
139	+	* History
140	+	* =======
141	+	*
142		* 07Apr90 Greg Ward
143		*
144		* Fixed correction factor for flat sources 29Oct2001 GW
#	Line 78 \| Line 154 \| static const char RCSid[] = "$Id$";
154
155		#define PI 3.14159265358979323846
156
157	<	/* floating comparisons -- floating point numbers within FTINY of each
158	<	* other are considered equal */
157	>	#define FAIL (-1)
158	>	#define SUCCESS 0
159	>
160	>	/* floating point comparisons -- floating point numbers within FTINY
161	>	* of each other are considered equal */
162		#define FTINY 1e-6
163		#define FEQ(a,b) ((a)<=(b)+FTINY&&(a)>=(b)-FTINY)
164
165	+	#define IESFIRSTVER 1986
166	+	#define IESLASTVER 2019
167
87	–	/* IESNA LM-63 keywords and constants */
88	–	/* Since 1991, LM-63 files have begun with the magic keyword IESNA */
89	–	#define MAGICID "IESNA"
90	–	#define LMAGICID 5
91	–	/* But newer files start with IESNA:LM-63- */
92	–	#define MAGICID2 "IESNA:LM-63-"
93	–	#define LMAGICID2 12
94	–	/* ies2rad supports the 1986, 1991, and 1995 versions of
95	–	* LM-63. FIRSTREV describes the first version; LASTREV describes the
96	–	* 1995 version. */
97	–	#define FIRSTREV 86
98	–	#define LASTREV 95
99	–
100	–	/* The following definitions support LM-63 file keyword reading and
101	–	* analysis.
102	–	*
103	–	* This section defines two function-like macros: keymatch(i,s), which
104	–	* checks to see if keyword i matches string s, and checklamp(s),
105	–	* which checks to see if a string matches the keywords "LAMP" or
106	–	* "LAMPCAT".
107	–	*
108	–	* LM-63-1986 files begin with a list of free-form label lines.
109	–	* LM-63-1991 files begin with the identifying line "IESNA91" followed
110	–	* by a list of formatted keywords. LM-63-1995 files begin with the
111	–	* identifying line "IESNA:LM-63-1995" followed by a list of formatted
112	–	* keywords.
113	–	*
114	–	* The K_* #defines enumerate the keywords used in the different
115	–	* versions of the file and give them symbolic names.
116	–	*
117	–	* The D86, D91, and D95 #defines validate the keywords in the 1986,
118	–	* 1991, and 1995 versions of the standard, one bit per keyword.
119	–	* Since the 1986 standard does not use keywords, D86 is zero. The
120	–	* 1991 standard has 13 keywords, and D91 has the lower 13 bits set.
121	–	* The 1995 standard has 14 keywords, and D95 has the lower 14 bits
122	–	* set.
123	–	*
124	–	*/
125	–	#define D86 0
126	–
127	–	#define K_TST 0
128	–	#define K_MAN 1
129	–	#define K_LMC 2
130	–	#define K_LMN 3
131	–	#define K_LPC 4
132	–	#define K_LMP 5
133	–	#define K_BAL 6
134	–	#define K_MTC 7
135	–	#define K_OTH 8
136	–	#define K_SCH 9
137	–	#define K_MOR 10
138	–	#define K_BLK 11
139	–	#define K_EBK 12
140	–
141	–	/* keywords defined in LM-63-1991 */
142	–	#define D91 ((1L<<13)-1)
143	–
144	–	#define K_LMG 13
145	–
146	–	/* keywords defined in LM-63-1995 */
147	–	#define D95 ((1L<<14)-1)
148	–
149	–	char k_kwd[][20] = {"TEST", "MANUFAC", "LUMCAT", "LUMINAIRE", "LAMPCAT",
150	–	"LAMP", "BALLAST", "MAINTCAT", "OTHER", "SEARCH",
151	–	"MORE", "BLOCK", "ENDBLOCK", "LUMINOUSGEOMETRY"};
152	–
153	–	long k_defined[] = {D86, D86, D86, D86, D86, D91, D91, D91, D91, D95};
154	–
155	–	int filerev = FIRSTREV;
156	–
157	–	#define keymatch(i,s) (k_defined[filerev-FIRSTREV]&1L<<(i) &&\
158	–	k_match(k_kwd[i],s))
159	–
160	–	#define checklamp(s) (!(k_defined[filerev-FIRSTREV]&(1<<K_LMP\|1<<K_LPC)) \|\|\
161	–	keymatch(K_LMP,s) \|\| keymatch(K_LPC,s))
162	–
168		/* tilt specs
169		*
170		* This next series of definitions address metal-halide lamps, which
#	Line 203 \| Line 208 \| int filerev = FIRSTREV;
208		#define U_METERS 2
209
210		/* string lengths */
211	<	/* Maximum input line is 256 characters including CR LF at end. */
211	>	/* Maximum length of a keyword, including brackets and NUL */
212	>	#define MAXKW 21
213	>	/* Maximum input line is 256 characters including CR LF and NUL at end. */
214		#define MAXLINE 257
215	+	#define MAXUNITNAME 64
216		#define RMAXWORD 76
217
218	<	/* End of LM-63-related #defines */
218	>	/* Shapes defined in the IES LM-63 standards
219	>	*
220	>	* PH stands for photometric horizontal
221	>	* PPH stands for perpendicular to photometric horizontal
222	>	* Cylinders are vertical and circular unless otherwise stated
223	>	*
224	>	* The numbers assigned here are not part of any LM-63 standard; they
225	>	* are for programming convenience.
226	>	*/
227	>	/* Error and not-yet-assigned constants */
228	>	#define IESERROR -2
229	>	#define IESNONE -1
230	>	/* Shapes */
231	>	#define IESPT 0
232	>	#define IESRECT 1
233	>	#define IESBOX 2
234	>	#define IESDISK 3
235	>	#define IESELLIPSE 4
236	>	#define IESVCYL 5
237	>	#define IESVECYL 6
238	>	#define IESSPHERE 7
239	>	#define IESELLIPSOID 8
240	>	#define IESHCYL_PH 9
241	>	#define IESHECYL_PH 10
242	>	#define IESHCYL_PPH 11
243	>	#define IESHECYL_PPH 12
244	>	#define IESVDISK_PH 13
245	>	#define IESVEL_PH 14
246
247	+	/* End of LM-63 related #defines */
248	+
249		/* file extensions */
250		#define T_RAD ".rad"
251		#define T_DST ".dat"
252		#define T_TLT "%.dat"
253		#define T_OCT ".oct"
254
255	<	/* shape types
255	>	/* Radiance shape types
256		* These #defines enumerate the shapes of the Radiance objects which
257		* emit the light.
258		*/
#	Line 236 \| Line 273 \| int filerev = FIRSTREV;
273		* or a '.' (current directory) */
274		#define abspath(p) (ISDIRSEP((p)[0]) \|\| (p)[0] == '.')
275
276	+	/* LM-63 related constants */
277	+	typedef struct {
278	+	char *tag;
279	+	int yr; } IESversions;
280	+
281	+	IESversions IESFILEVERSIONS[] = {
282	+	{ "IESNA91", 1991 },
283	+	{ "IESNA:LM-63-1995", 1995 },
284	+	{ "IESNA:LM-63-2002", 2002 },
285	+	{ "IES:LM-63-2019", 2019 },
286	+	{ NULL, 1986 }
287	+	};
288	+
289	+	char *IESHAPENAMES[] = {
290	+	"point", "rectangle", "box", "disk", "ellipse", "vertical cylinder",
291	+	"vertical elliptical cylinder", "sphere", "ellipsoid",
292	+	"horizontal cylinder along photometric horizontal",
293	+	"horizontal elliptical cylinder along photometric horizontal",
294	+	"horizontal cylinder perpendicular to photometric horizontal",
295	+	"horizontal elliptical cylinder perpendicular to photometric horizontal",
296	+	"vertical disk facing photometric horizontal",
297	+	"vertical ellipse facing photometric horizontal" };
298	+
299	+	/* end of LM-63 related constants */
300	+
301	+	/* Radiance shape names */
302	+	char *RADSHAPENAMES[] = { "rectangle or box", "disk or cylinder", "sphere" };
303	+
304		/* Global variables.
305		*
306		* Mostly, these are a way of communicating command line parameters to
#	Line 253 \| Line 318 \| *char deflamp = NULL; /* default lamp type /*
318		float defcolor[3] = {1.,1.,1.}; /* default lamp color */
319		float lampcolor = defcolor; / pointer to current lamp color */
320		double multiplier = 1.0; /* multiplier for all light sources */
321	<	char units[64] = "meters"; /* output units */
321	>	char units[MAXUNITNAME] = "meters"; /* output units */
322		int out2stdout = 0; /* put out to stdout r.t. file */
323		int instantiate = 0; /* instantiate geometry */
324		double illumrad = 0.0; /* radius for illum sphere */
#	Line 265 \| Line 330 \| typedef struct {
330		double mult; /* candela multiplier */
331		double w, l, h; /* width, length, height */
332		double area; /* max. projected area */
333	+	int filerev; /* IES file version */
334	+	int havelamppos; /* Lamp position was given */
335	+	float lamppos[2]; /* Lamp position */
336	+	int iesshape; /* Shape number */
337	+	char warn; / Warning message */
338		} SRCINFO; /* a source shape (units=meters) */
339
340		/* A count and pointer to the list of input file names */
#	Line 287 \| Line 357 \| char gargv; /* global argv /*
357		* confusing define accommodates that. */
358		#define isint isflt
359
360	<	/* Function declarations */
360	>	/* IES file conversion functions */
361		static int ies2rad(char inpname, char outname);
362		static void initlamps(void);
363		static int dosource(SRCINFO sinf, FILE in, FILE out, char mod, char *name);
#	Line 298 \| Line 368 \| *static int cvtint(int ip, char wrd);*
368		static int cvdata(FILE in, FILE out, int ndim, int npts[], double mult,
369		double lim[][2]);
370		static int cvtflt(double rp, char wrd);
371	+	static int makeiesshape(SRCINFO *shp, double length, double width, double height);
372	+	static int makeillumsphere(SRCINFO *shp);
373		static int makeshape(SRCINFO *shp, double width, double length, double height);
374	+	static void makecylshape(SRCINFO *shp, double diam, double height);
375	+	static void makeelshape(SRCINFO *shp, double width, double length, double height);
376	+	static void makeecylshape(SRCINFO *shp, double width, double length, double height);
377	+	static void makeelshape(SRCINFO *shp, double width, double length, double height);
378	+	static void makeboxshape(SRCINFO *shp, double length, double width, double height);
379	+	static int makepointshape(SRCINFO *shp);
380		static int putsource(SRCINFO shp, FILE fp, char mod, char name,
381		int dolower, int doupper, int dosides);
382		static void putrectsrc(SRCINFO shp, FILE fp, char mod, char name, int up);
#	Line 309 \| Line 387 \| *static void putrect(SRCINFO shp, FILE fp, char mod,**
387		int a, int b, int c, int d);
388		static void putpoint(SRCINFO shp, FILE fp, int p);
389		static void putcyl(SRCINFO shp, FILE fp, char mod, char name);
390	+	static void shapearea(SRCINFO *shp);
391	+
392	+	/* string and filename functions */
393	+	static int isprefix(char p, char s);
394	+	static char * matchprefix(char p, char s);
395		static char * tailtrunc(char *name);
396		static char * filename(char *path);
397		static char * libname(char path, char fname, char *suffix);
398		static char * getword(FILE *fp);
399		static char * fullnam(char path, char fname, char *suffix);
400
401	+	/* output function */
402	+	static void fpcomment(FILE fp, char prefix, char *s);
403	+
404		/* main - process arguments and run the conversion
405		*
406		* Refer to the man page for details of the arguments.
#	Line 537 \| Line 623 \| *initlamps(void) / set up lamps /*
623		}
624
625		/*
626	+	* String functions
627	+	*/
628	+
629	+	/*
630	+	* isprefix - return 1 (true) if p is a prefix of s, 0 otherwise
631	+	*
632	+	* For this to work properly, s must be as long or longer than p.
633	+	*/
634	+	int
635	+	isprefix(char p, char s) {
636	+	return matchprefix(p,s) != NULL;
637	+	}
638	+
639	+	/*
640	+	* matchprefix - match p against s
641	+	*
642	+	* If p is a prefix of s, return a pointer to the character of s just
643	+	* past p.
644	+	*
645	+	* For this to work properly, s must be as long or longer than p.
646	+	*/
647	+	char *
648	+	matchprefix(char p, char s) {
649	+	int c;
650	+
651	+	while ((c = *p++)) {
652	+	if (c != *s++)
653	+	return NULL;
654	+	}
655	+	return s;
656	+	}
657	+
658	+	/*
659	+	* skipws - skip whitespace
660	+	*/
661	+	char *
662	+	skipws(char *s) {
663	+	while (isspace(*s))
664	+	s++;
665	+	return s;
666	+	}
667	+
668	+	/*
669	+	* streq - test strings for equality
670	+	*/
671	+	int
672	+	streq(char s1, char s2) {
673	+	return strcmp(s1,s2) == 0;
674	+	}
675	+
676	+	/*
677	+	* strneq - test strings for equality, with a length limit
678	+	*/
679	+	int
680	+	strneq(char s1, char s2, int n) {
681	+	return strncmp(s1,s2,n) == 0;
682	+	}
683	+
684	+	/*
685	+	* IES (LM-63) file functions
686	+	*/
687	+
688	+	/*
689	+	* prockwd - process keywords on a label line
690	+	*
691	+	* We're looking for four keywords: LAMP, LAMPCAT, LAMPPOSITION, and
692	+	* LUMINOUSGEOMETRY. Any other keywords are ignored.
693	+	*
694	+	* LAMP and LAMPCAT are searched for a known lamp type name.
695	+	* LAMPPOSITION is stored.
696	+	* LUMINOUSGEOMETRY contains the name of an MGF file, which is stored.
697	+	*/
698	+	void
699	+	prockwd(char bp, char geomfile, char inpname, SRCINFO srcinfo) {
700	+	char *kwbegin;
701	+	int kwlen;
702	+
703	+	bp = skipws(bp); /* Skip leading whitespace. */
704	+	if (*bp != '[')
705	+	return; /* If there's no keyword on this line,
706	+	* do nothing */
707	+	kwbegin = bp;
708	+	while (bp && bp != ']') /* Skip to the end of the keyword or
709	+	* end of the buffer. */
710	+	bp++;
711	+	if (!(bp)) / If the keyword doesn't have a
712	+	* terminating ']', return. */
713	+	return;
714	+	kwlen = bp - kwbegin + 1;
715	+	bp++;
716	+	if (lampcolor == NULL && strneq("[LAMP]", kwbegin, kwlen))
717	+	lampcolor = matchlamp(bp);
718	+	else if (lampcolor == NULL && strneq("[LAMPCAT]", kwbegin, kwlen))
719	+	lampcolor = matchlamp(bp);
720	+	else if (strneq("[LUMINOUSGEOMETRY]", kwbegin, kwlen)) {
721	+	bp = skipws(bp); /* Skip leading whitespace. */
722	+	strcpy(geomfile, inpname); /* Copy the input file path */
723	+	/* Replace the filename in the input file path with
724	+	* the name of the MGF file. Trailing spaces were
725	+	* trimmed before this routine was called. */
726	+	strcpy(filename(geomfile), bp);
727	+	srcinfo->isillum = 1;
728	+	}
729	+	else if (strneq("[LAMPPOSITION]", kwbegin, kwlen)) {
730	+	srcinfo->havelamppos = 1;
731	+	sscanf(bp,"%f%f", &(srcinfo->lamppos[0]),
732	+	&(srcinfo->lamppos[1]));
733	+	}
734	+	}
735	+
736	+	/*
737	+	* iesversion - examine the first line of an IES file and return the version
738	+	*
739	+	* Returns the year of the version. If the version is unknown,
740	+	* returns 1986, since the first line of a 1986-format IES file can be
741	+	* anything.
742	+	*/
743	+	int
744	+	iesversion(char *buf) {
745	+	IESversions *v;
746	+
747	+	for(v = IESFILEVERSIONS; v != NULL; v++)
748	+	if (streq(v->tag,buf))
749	+	return v->yr;
750	+	return v->yr;
751	+	}
752	+
753	+
754	+	/*
755		* File path operations
756		*
757		* These provide file path operations that operate on both MS-Windows
#	Line 631 \| Line 846 \| libname(
846		return(path);
847		}
848
849	<	/* filename - find the base file name in a buffer containing a path
849	>	/* filename - pointer to filename in buffer containing path
850		*
851	<	* The pointer is to a character within the buffer, not a string in itself;
852	<	* it will become invalid when the buffer is freed.
853	<	*
851	>	* Scan the path, recording directory separators. Return the location
852	>	* of the character past the last one. If no directory separators are
853	>	* found, returns a pointer to beginning of the path.
854		*/
855		char *
856		filename(
857		char *path
858		)
859		{
860	<	char *cp;
860	>	char *cp = path;
861
862	<	for (cp = path; *path; path++)
862	>	for (; *path; path++)
863		if (ISDIRSEP(*path))
864		cp = path+1;
865		return(cp);
#	Line 717 \| Line 932 \| blanktrunc(
932		*++cp = '\0';
933		}
934
935	<	/* k_match - return true if keyword matches header line */
721	<	int
722	<	k_match(
723	<	char kwd, / keyword */
724	<	char hdl / header line */
725	<	)
726	<	{
727	<	/* Skip leading spaces */
728	<	while (isspace(*hdl))
729	<	hdl++;
730	<	/* The line has to begin with '[' */
731	<	if (*hdl++ != '[')
732	<	return(0);
733	<	/* case-independent keyword match */
734	<	while (toupper(hdl) == kwd++)
735	<	if (!*hdl++)
736	<	return(0);
737	<	/* If we have come to the end of the keyword, and the keyword
738	<	* at the beginning of the matched line is terminated with
739	<	* ']', return 1 */
740	<	return(!kwd[-1] & (*hdl == ']'));
741	<	}
742	<
743	<	/* keyargs - return the argument of a keyword, without leading spaces
935	>	/* fpcomment - output a multi-line comment
936		*
937	<	* keyargs is passed a pointer to a buffer; it returns a pointer to
938	<	* where the argument starts in the buffer
939	<	*
937	>	* The comment may be multiple lines, with each line separated by a
938	>	* newline. Each line is prefixed by prefix. If the last line isn't
939	>	* terminated by a newline, no newline will be output.
940		*/
941	<	char *
942	<	keyargs(
943	<	char hdl / header line */
944	<	)
945	<	{
946	<	while (hdl && hdl++ != ']')
947	<	;
948	<	while (isspace(*hdl))
949	<	hdl++;
950	<	return(hdl);
941	>	void
942	>	fpcomment(FILE fp, char prefix, char *s) {
943	>	while (s) { / While there are characters left to output */
944	>	fprintf(fp, "%s", prefix); /* Output the prefix */
945	>	for (; s && s != '\n'; s++) /* Output a line */
946	>	putc(*s, fp);
947	>	if (s == '\n') { / Including the newline, if any */
948	>	putc(*s, fp);
949	>	s++;
950	>	}
951	>	}
952		}
953
761	–
954		/* putheader - output the header of the .rad file
955		*
956		* Header is:
#	Line 790 \| Line 982 \| putheader(
982		*
983		* Return -1 in case of failure, 0 in case of success.
984		*
793	–	* The file version recognition is confused and will treat 1995 and
794	–	* 2002 version files as 1986 version files.
795	–	*
985		*/
986		int
987		ies2rad( /* convert IES file */
#	Line 802 \| Line 991 \| *ies2rad( / convert IES file /*
991		{
992		SRCINFO srcinfo;
993		char buf[MAXLINE], tltid[RMAXWORD];
994	<	char geomfile[128];
994	>	char geomfile[MAXLINE];
995		FILE inpfp, outfp;
996		int lineno = 0;
997
998	<	/* Open input and output files */
999	<	geomfile[0] = '\0';
998	>
999	>	/* Initialize srcinfo */
1000	>	srcinfo.filerev = IESFIRSTVER;
1001	>	srcinfo.iesshape = IESNONE;
1002	>	srcinfo.warn = NULL;
1003		srcinfo.isillum = 0;
1004	+	srcinfo.havelamppos = 0;
1005	+	/* Open input and output files */
1006	+	geomfile[0] = '\0';
1007		if (inpname == NULL) {
1008		inpname = "<stdin>";
1009		inpfp = stdin;
#	Line 840 \| Line 1035 \| *ies2rad( / convert IES file /*
1035		blanktrunc(buf); /* Trim trailing spaces, CR, LF. */
1036		if (!buf[0]) /* Skip blank lines */
1037		continue;
1038	<	/* increment the header line count, and check for the
1039	<	* "TILT=" line that terminates the header */
1040	<	if (!lineno++) { /* first line may be magic */
1041	<	if (!strncmp(buf, MAGICID2, LMAGICID2))
1042	<	filerev = atoi(buf+LMAGICID2) - 1900;
1043	<	else if (!strncmp(buf, MAGICID, LMAGICID))
849	<	filerev = atoi(buf+LMAGICID);
850	<	if (filerev < FIRSTREV)
851	<	filerev = FIRSTREV;
852	<	else if (filerev > LASTREV)
853	<	filerev = LASTREV;
854	<	}
1038	>	/* increment the header line count. If we are on the
1039	>	* first line of the file, check for a version tag. If
1040	>	* one is not found, assume the first version of the
1041	>	* file. */
1042	>	if (!lineno++)
1043	>	srcinfo.filerev = iesversion(buf);
1044		/* Output the header line as a comment in the .rad file. */
1045		fputs("#<", outfp);
1046		fputs(buf, outfp);
1047		putc('\n', outfp);
1048
1049	<	/* If the header line is a keyword line (file version
1050	<	* later than 1986 and begins with '['), check a lamp
1051	<	* in the "[LAMP]" and "[LAMPCAT]" keyword lines;
1052	<	* otherwise check all lines. */
1053	<	if (lampcolor == NULL && checklamp(buf))
1054	<	lampcolor = matchlamp(*sskip2(buf,0) == '[' ?
1055	<	keyargs(buf) : buf );
867	<	/* Look for a materials and geometry file in the keywords. */
868	<	if (keymatch(K_LMG, buf)) {
869	<	strcpy(geomfile, inpname);
870	<	strcpy(filename(geomfile), keyargs(buf));
871	<	srcinfo.isillum = 1;
872	<	}
1049	>	/* For post-1986 version files, process a keyword
1050	>	* line. Otherwise, just scan the line for a lamp
1051	>	* name */
1052	>	if (srcinfo.filerev != 1986)
1053	>	prockwd(buf, geomfile, inpname, &srcinfo);
1054	>	else if (lampcolor == NULL)
1055	>	lampcolor = matchlamp(buf);
1056		}
1057
1058		/* Done reading header information. If a lamp color still
#	Line 1072 \| Line 1255 \| dosource(
1255		fprintf(stderr, "dosource: bad lamp specification\n");
1256		return(-1);
1257		}
1258	+
1259	+	/* pfactor is only provided in 1986 and 1991 format files, and
1260	+	* is something completely different in 2019 files. If the
1261	+	* file version is 1995 or later, set it to 1.0 to avoid
1262	+	* error. */
1263	+	if (sinf->filerev >= 1995)
1264	+	pfactor = 1.0;
1265	+
1266		/* Type A photometry is not supported */
1267		if (pmtype != PM_C && pmtype != PM_B) {
1268		fprintf(stderr, "dosource: unsupported photometric type (%d)\n",
#	Line 1081 \| Line 1272 \| dosource(
1272
1273		/* Multiplier = the multiplier from the -m option, times the
1274		* multiplier from the IES file, times the ballast factor,
1275	<	* times the "ballast lamp photometric factor," which was part
1276	<	* of the 1986 and 1991 standards. In the 1995 standard, it is
1277	<	* always supposed to be 1. */
1275	>	* times the "ballast lamp photometric factor," (pfactor)
1276	>	* which was part of the 1986 and 1991 standards. In the 1995
1277	>	* and 2002 standards, it is always supposed to be 1 and in
1278	>	* the 2019 standard it encodes information about the source
1279	>	* of the file. For those files, pfactor is set to 1.0,
1280	>	* above. */
1281		sinf->mult = multipliermultbfactor*pfactor;
1282
1283		/* If the count of angles is wrong, raise an error and quit. */
#	Line 1102 \| Line 1296 \| dosource(
1296		/* Make decisions about the shape of the light source
1297		* geometry, and store them in sinf. */
1298		if (makeshape(sinf, width, length, height) != 0) {
1299	<	fprintf(stderr, "dosource: illegal source dimensions");
1299	>	fprintf(stderr, "dosource: illegal source dimensions\n");
1300		return(-1);
1301		}
1302	+	/* If any warning messages were generated by makeshape(), output them */
1303	+	if ((sinf->warn) != NULL)
1304	+	fputs(sinf->warn, stderr);
1305
1306		/* Copy the candela values into a Radiance data file. */
1307		if ((datout = fopen(fullnam(buf,name,T_DST), "w")) == NULL) {
#	Line 1120 \| Line 1317 \| dosource(
1317		fclose(datout);
1318
1319		/* Output explanatory comment */
1320	<	fprintf(out, "# %g watt luminaire, lamp*ballast factor = %g\n",
1320	>	fprintf(out, "\n# %g watt luminaire, lamp*ballast factor = %g\n",
1321		wattage, bfactor*pfactor);
1322	+	if (sinf->iesshape >= 0)
1323	+	fprintf(out, "# IES file shape = %s\n",
1324	+	IESHAPENAMES[sinf->iesshape]);
1325	+	else
1326	+	fprintf(out, "# IES file shape overridden\n");
1327	+	fprintf(out, "# Radiance geometry shape = %s\n",
1328	+	RADSHAPENAMES[sinf->type - 1]);
1329	+	if (sinf->warn != NULL)
1330	+	fpcomment(out, "# ", sinf->warn);
1331	+
1332		/* Output distribution "brightdata" primitive. Start handling
1333	<	the various cases of symmetry of the distribution. */
1333	>	the various cases of symmetry of the distribution. This
1334	>	code reflects the complexity of the LM-63 format, as
1335	>	described under "<horizontal angles>" in the various
1336	>	versions of the standard. */
1337		strcat(strcpy(id, filename(name)), "_dist");
1338		fprintf(out, "\n'%s' brightdata '%s'\n", mod, id);
1339		if (nangles[1] < 2)
1340	+	/* if it's a radially-symmetric type C distribution */
1341		fprintf(out, "4 ");
1342		else if (pmtype == PM_B)
1343	+	/* Photometry type B */
1344		fprintf(out, "5 ");
1345		else if (FEQ(bounds[1][0],90.) && FEQ(bounds[1][1],270.))
1346	+	/* Symmetric around the 90-270 degree plane */
1347		fprintf(out, "7 ");
1348		else
1349	+	/* Just regular type C photometry */
1350		fprintf(out, "5 ");
1351
1352		/* If the generated source geometry will be a box, a flat
1353		* rectangle, or a disk figure out if it needs a top, a
1354		* bottom, and/or sides. */
1355	<	dolower = (bounds[0][0] < 90.-FTINY); /* Bottom */
1356	<	doupper = (bounds[0][1] > 90.+FTINY); /* Top */
1355	>	dolower = (bounds[0][0] < 90.-FTINY); /* Smallest vertical angle */
1356	>	doupper = (bounds[0][1] > 90.+FTINY); /* Largest vertical angle */
1357		dosides = (doupper & dolower && sinf->h > MINDIM); /* Sides */
1358
1359		/* Select the appropriate function and parameters from source.cal */
#	Line 1149 \| Line 1363 \| dosource(
1363		sinf->type==DISK ? "cylcorr" : "boxcorr",
1364		libname(buf,name,T_DST));
1365		if (pmtype == PM_B) {
1366	+	/* Type B photometry */
1367		if (FEQ(bounds[1][0],0.))
1368	+	/* laterally symmetric around a vertical plane */
1369		fprintf(out, "srcB_horiz2 ");
1370		else
1371		fprintf(out, "srcB_horiz ");
1372		fprintf(out, "srcB_vert ");
1373		} else /* pmtype == PM_C */ {
1374		if (nangles[1] >= 2) {
1375	+	/* Not radially symmetric */
1376		d1 = bounds[1][1] - bounds[1][0];
1377		if (d1 <= 90.+FTINY)
1378	+	/* Data for a quadrant */
1379		fprintf(out, "src_phi4 ");
1380		else if (d1 <= 180.+FTINY) {
1381	+	/* Data for a hemisphere */
1382		if (FEQ(bounds[1][0],90.))
1383		fprintf(out, "src_phi2+90 ");
1384		else
1385		fprintf(out, "src_phi2 ");
1386	<	} else
1386	>	} else /* Data for a whole sphere */
1387		fprintf(out, "src_phi ");
1388		fprintf(out, "src_theta ");
1389	+	/* For the hemisphere around the 90-270 degree plane */
1390		if (FEQ(bounds[1][0],90.) && FEQ(bounds[1][1],270.))
1391		fprintf(out, "-rz -90 ");
1392	<	} else
1392	>	} else /* Radially symmetric */
1393		fprintf(out, "src_theta ");
1394		}
1395		/* finish the brightdata primitive with appropriate data */
#	Line 1252 \| Line 1472 \| putsource(
1472		* Makeshape decides what Radiance geometry will be used to represent
1473		* the light source and stores information about it in shp.
1474		*
1475	+	* The height, width, and length parameters are values from the
1476	+	* IES file, given in meters.
1477	+	*
1478		* The various versions of the IES LM-63 standard give a "luminous
1479		* opening" (really a crude shape) a width, a length (or depth), and a
1480		* height. If all three values are positive, they describe a box. If
#	Line 1265 \| Line 1488 \| putsource(
1488		* boxes (RECT), cylinders or disks (DISK), and spheres (SPHERE.) A
1489		* point is necessarily represented by a small sphere, since a point
1490		* is not a Radiance object.
1491	+	*
1492	+	* Makeshape() returns 0 if it succeeds in choosing a shape, and -1 if
1493	+	* it fails.
1494	+	*
1495		*/
1496		int
1497		makeshape(
#	Line 1274 \| Line 1501 \| makeshape(
1501		double height
1502		)
1503		{
1504	<	/* Categorize the shape */
1505	<	if (illumrad/meters2out >= MINDIM/2.) {
1506	<	/* If the -i command line option is used, output an
1507	<	* "illum" sphere whose radius is given by the
1508	<	* argument to -i. */
1509	<	shp->isillum = 1;
1504	>	int rc;
1505	>
1506	>	if (illumrad != 0.0)
1507	>	rc = makeillumsphere(shp);
1508	>	else
1509	>	rc = makeiesshape(shp, length, width, height);
1510	>	if (rc == SUCCESS)
1511	>	shapearea(shp);
1512	>	return rc;
1513	>	}
1514	>
1515	>	/*
1516	>	* Return 1 if d < 0, 2 if d == 0, 3 if d > 0. This is used to encode
1517	>	* the signs of IES file dimensions for quick lookup. As usual with
1518	>	* macros, don't use an expression with side effects as an argument.
1519	>	*/
1520	>	#define CONVSGN(d) ((d) < 0 ? 1 : ((d) == 0 ? 2 : 3))
1521	>
1522	>	/* makeiesshape - convert IES shape to Radiance shape
1523	>	*
1524	>	* Some 34 cases in the various versions of the IES LM-63 standard are
1525	>	* handled, though some only by approximation. For each case which is
1526	>	* processed a Radiance box, cylinder, or sphere is selected.
1527	>	*
1528	>	* Shapes are categorized by version year of the standard and the
1529	>	* signs of the LM-63 length, width (depth), and height fields. These
1530	>	* are combined and converted to an integer, which is then used as the
1531	>	* argument to switch(). The last two digits of the IES file version
1532	>	* year are used and the signs of length, width, and height are
1533	>	* encoded, in that order, as 1 for negative, 2 for zero, and 3 for
1534	>	* positive. These are then combined into a numeric key by the
1535	>	* following formula:
1536	>	*
1537	>	* version * 1000 + sgn(length) * 100 + sgn(width) * 10 + sgn(height).
1538	>	*
1539	>	* Since the 1991 version uses the same encoding as the 1986 version,
1540	>	* and the 2019 version uses the same encoding as the 2002 version,
1541	>	* these are collapsed into the earlier years.
1542	>	*
1543	>	* In the cases of the switch() statement, further processing takes
1544	>	* place. Circles and ellipses are distinguished by comparisons. Then
1545	>	* routines are called to fill out the fields of the shp structure.
1546	>	*
1547	>	* As per the conventions of the rest of ies2rad, makeiesshape()
1548	>	* returns 0 on success and -1 on failure. -1 reflects an error in
1549	>	* the IES file and is unusual.
1550	>	*
1551	>	* By convention, the shape generating routines are always given
1552	>	* positive values for dimensions and always succeed; all errors are
1553	>	* caught before they are called. The absolute values of all three
1554	>	* dimensions are calculated at the beginning of makeiesshape() and
1555	>	* used throughout the function, this has a low cost and eliminates
1556	>	* the chance of sign errors.
1557	>	*
1558	>	* There is one extension to the ies standard here, devised to
1559	>	* accomdate wall-mounted fixtures; vertical rectangles, not formally
1560	>	* supported by any version of LM-63, are treated as boxes.
1561	>	*
1562	>	* The code is complicated by the way that earlier versions of the
1563	>	* standard (1986 and 1991) prioritize width in their discussions, and
1564	>	* later versions prioritize length. It is not always clear which to
1565	>	* write first and there is hesitation between the older code which
1566	>	* invokes makeiesshape() and makeiesshape() itself.
1567	>	*/
1568	>	int
1569	>	makeiesshape(SRCINFO *shp, double l, double w, double h) {
1570	>	int rc = SUCCESS;
1571	>	int shape = IESNONE;
1572	>	/* Get the last two digits of the standard year */
1573	>	int ver = shp->filerev % 100;
1574	>	/* Make positive versions of all dimensions, for clarity in
1575	>	* function calls. If you like, read this as l', w', and h'. */
1576	>	double lp = fabs(l), wp = fabs(w), hp = fabs(h);
1577	>	int thumbprint;
1578	>
1579	>	/* Change 1991 into 1986 and 2019 in 2002 */
1580	>	switch (ver) {
1581	>	case 91:
1582	>	ver = 86;
1583	>	break;
1584	>	case 19:
1585	>	ver = 02;
1586	>	break;
1587	>	}
1588	>
1589	>	thumbprint =
1590	>	ver * 1000 + CONVSGN(l) * 100 + CONVSGN(w) * 10 + CONVSGN(h);
1591	>	switch(thumbprint) {
1592	>	case 86222: case 95222: case 2222:
1593	>	shp->iesshape = IESPT;
1594		shp->type = SPHERE;
1595	<	shp->w = shp->l = shp->h = 2.*illumrad / meters2out;
1596	<	/* Otherwise, use the dimensions in the IES file */
1597	<	} else if (width < MINDIM) {
1598	<	width = -width;
1599	<	if (width < MINDIM) {
1600	<	/* If the LM-63 width is zero, assume a point
1601	<	* source is described. Output a small
1602	<	* sphere. */
1603	<	shp->type = SPHERE;
1604	<	shp->w = shp->l = shp->h = MINDIM;
1605	<	} else if (height < .5*width) {
1606	<	/* The width is negative and the height is
1607	<	* less than half the width. Treat the
1608	<	* luminous opening as a disk or short
1609	<	* vertical cylinder. Disks will be
1610	<	* represented as nearly flat cylinders of
1611	<	* MINDIM/2 height. */
1612	<	shp->type = DISK;
1613	<	shp->w = shp->l = width;
1614	<	if (height >= MINDIM)
1615	<	shp->h = height;
1616	<	else
1617	<	shp->h = .5*MINDIM;
1618	<	} else {
1619	<	/* Treat a tall cylinder as a sphere. */
1620	<	shp->type = SPHERE;
1621	<	shp->w = shp->l = shp->h = width;
1595	>	shp->w = shp->l = shp->h = MINDIM;
1596	>	break;
1597	>	case 86332: case 95332: case 2332:
1598	>	shp->iesshape = IESRECT;
1599	>	makeboxshape(shp, lp, wp, hp);
1600	>	break;
1601	>	case 86333: case 86233: case 86323:
1602	>	case 95333: case 95233: case 95323:
1603	>	case 2333: case 2233: case 2323:
1604	>	shp->iesshape = IESBOX;
1605	>	makeboxshape(shp, lp, wp, hp);
1606	>	break;
1607	>	case 86212: case 95212:
1608	>	shp->iesshape = IESDISK;
1609	>	makecylshape(shp, wp, hp);
1610	>	break;
1611	>	case 86213:
1612	>	shp->iesshape = IESVCYL;
1613	>	makecylshape(shp, wp, hp);
1614	>	break;
1615	>	case 86312:
1616	>	shp->iesshape = IESELLIPSE;
1617	>	makeecylshape(shp, lp, wp, 0);
1618	>	break;
1619	>	case 86313:
1620	>	shp->iesshape = IESELLIPSOID;
1621	>	makeelshape(shp, wp, lp, hp);
1622	>	break;
1623	>	case 95211:
1624	>	shp->iesshape = FEQ(lp,hp) ? IESSPHERE : IESNONE;
1625	>	if (shp->iesshape == IESNONE) {
1626	>	shp->warn = "makeshape: cannot determine shape\n";
1627	>	rc = FAIL;
1628	>	break;
1629		}
1630	<	} else {
1631	<	/* The width is positive. The luminous opening is a
1632	<	box or simple rectangle. */
1633	<	shp->type = RECT;
1634	<	shp->w = width;
1635	<	if (length >= MINDIM)
1636	<	shp->l = length;
1630	>	shp->type = SPHERE;
1631	>	shp->w = shp->l = shp->h = wp;
1632	>	break;
1633	>	case 95213:
1634	>	shp->iesshape = IESVCYL;
1635	>	makecylshape(shp, wp, hp);
1636	>	break;
1637	>	case 95321:
1638	>	shp->iesshape = IESHCYL_PH;
1639	>	shp->warn = "makeshape: shape is a horizontal cylinder, which is not supported.\nmakeshape: replaced with box\n";
1640	>	makeboxshape(shp, lp, wp, hp);
1641	>	break;
1642	>	case 95231:
1643	>	shp->iesshape = IESHCYL_PPH;
1644	>	shp->warn = "makeshape: shape is a horizontal cylinder, which is not supported.\nmakeshape: replaced with box\n";
1645	>	makeboxshape(shp, lp, wp, hp);
1646	>	break;
1647	>	case 95133: case 95313:
1648	>	shp->iesshape = IESVECYL;
1649	>	makeecylshape(shp, lp, wp, hp);
1650	>	break;
1651	>	case 95131: case 95311:
1652	>	shp->iesshape = IESELLIPSOID;
1653	>	makeelshape(shp, lp, wp, hp);
1654	>	break;
1655	>	case 2112:
1656	>	shp->iesshape = FEQ(l,w) ? IESDISK : IESELLIPSE;
1657	>	if (shp->iesshape == IESDISK)
1658	>	makecylshape(shp, wp, hp);
1659		else
1660	<	shp->l = MINDIM;
1661	<	if (height >= MINDIM)
1662	<	shp->h = height;
1660	>	makeecylshape(shp, wp, lp, hp);
1661	>	break;
1662	>	case 2113:
1663	>	shp->iesshape = FEQ(l,w) ? IESVCYL : IESVECYL;
1664	>	if (shp->iesshape == IESVCYL)
1665	>	makecylshape(shp, wp, hp);
1666		else
1667	<	shp->h = .5*MINDIM;
1667	>	makeecylshape(shp, wp, lp, hp);
1668	>	break;
1669	>	case 2111:
1670	>	shp->iesshape = FEQ(l,w) && FEQ(l,h) ? IESSPHERE : IESELLIPSOID;
1671	>	if (shp->iesshape == IESSPHERE) {
1672	>	shp->type = SPHERE;
1673	>	shp->w = shp->l = shp->h = wp;
1674	>	}
1675	>	else
1676	>	makeelshape(shp, lp, wp, hp);
1677	>	break;
1678	>	case 2311:
1679	>	shp->iesshape = FEQ(w,h) ? IESHCYL_PH : IESHECYL_PH;
1680	>	shp->warn = "makeshape: shape is a horizontal cylinder, which is not supported.\nmakeshape: replaced with box\n";
1681	>	makeboxshape(shp, lp, wp, hp);
1682	>	break;
1683	>	case 2131:
1684	>	shp->iesshape = FEQ(l,h) ? IESHCYL_PPH : IESHECYL_PPH;
1685	>	shp->warn = "makeshape: shape is a horizontal cylinder, which is not supported.\nmakeshape: replaced with box\n";
1686	>	makeboxshape(shp, lp, wp, hp);
1687	>	break;
1688	>	case 2121:
1689	>	shp->iesshape = FEQ(w,h) ? IESVDISK_PH : IESVEL_PH;
1690	>	shp->warn = "makeshape: shape is a vertical ellipse, which is not supported.\nmakeshape: replaced with rectangle\n";
1691	>	makeboxshape(shp, lp, wp, hp);
1692	>	break;
1693	>	default:
1694	>	/* We don't recognize the shape - report an error. */
1695	>	rc = FAIL;
1696		}
1697	+	return rc;
1698	+	}
1699
1700	<	/* Done choosing the shape; calculate its area in the x-y plane. */
1700	>	/* makeillumsphere - create an illum sphere */
1701	>	int
1702	>	makeillumsphere(SRCINFO *shp) {
1703	>	/* If the size is too small or negative, error. */
1704	>	if (illumrad/meters2out < MINDIM/2.) {
1705	>	fprintf(stderr, "makeillumsphere: -i argument is too small or negative\n");
1706	>	return FAIL;
1707	>	}
1708	>	shp->isillum = 1;
1709	>	shp->type = SPHERE;
1710	>	shp->w = shp->l = shp->h = 2.*illumrad / meters2out;
1711	>	return SUCCESS;
1712	>	}
1713	>
1714	>	/* makeboxshape - create a box */
1715	>	void
1716	>	makeboxshape(SRCINFO *shp, double l, double w, double h) {
1717	>	shp->type = RECT;
1718	>	shp->l = fmax(l, MINDIM);
1719	>	shp->w = fmax(w, MINDIM);
1720	>	shp->h = fmax(h, .5*MINDIM);
1721	>	}
1722	>
1723	>	/* makecylshape - output a vertical cylinder or disk
1724	>	*
1725	>	* If the shape has no height, make it a half-millimeter.
1726	>	*/
1727	>	void
1728	>	makecylshape(SRCINFO *shp, double diam, double height) {
1729	>	shp->type = DISK;
1730	>	shp->w = shp->l = diam;
1731	>	shp->h = fmax(height, .5*MINDIM);
1732	>	}
1733	>
1734	>	/* makeelshape - create a substitute for an ellipsoid
1735	>	*
1736	>	* Because we don't actually support ellipsoids, and they don't seem
1737	>	* to be common in actual IES files.
1738	>	*/
1739	>	void
1740	>	makeelshape(SRCINFO *shp, double w, double l, double h) {
1741	>	float avg = (w + l + h) / 3;
1742	>	float bot = .5 * avg;
1743	>	float top = 1.5 * avg;
1744	>
1745	>	if (bot < w && w < top
1746	>	&& bot < l && l < top
1747	>	&& bot < h && h > top) {
1748	>	/* it's sort of spherical, replace it with a sphere */
1749	>	shp->warn = "makeshape: shape is an ellipsoid, which is not supported.\nmakeshape: replaced with sphere\n";
1750	>	shp->type = SPHERE;
1751	>	shp->w = shp->l = shp->h = avg;
1752	>	} else if (bot < w && w < top
1753	>	&& bot < l && l < top
1754	>	&& h <= .5*MINDIM) {
1755	>	/* It's flat and sort of circular, replace it
1756	>	* with a disk. */
1757	>	shp->warn = "makeshape: shape is an ellipse, which is not supported.\nmakeshape: replaced with disk\n";
1758	>	makecylshape(shp, w, 0);
1759	>	} else {
1760	>	shp->warn = "makeshape: shape is an ellipsoid, which is not supported.\nmakeshape: replaced with box\n";
1761	>	makeboxshape(shp, w, l, h);
1762	>	}
1763	>	}
1764	>
1765	>	/* makeecylshape - create a substitute for an elliptical cylinder or disk */
1766	>	void
1767	>	makeecylshape(SRCINFO *shp, double l, double w, double h) {
1768	>	float avg = (w + l) / 2;
1769	>	float bot = .5 * avg;
1770	>	float top = 1.5 * avg;
1771	>
1772	>	if (bot < w && w < top
1773	>	&& bot < l && l < top) {
1774	>	/* It's sort of circular, replace it
1775	>	* with a circular cylinder. */
1776	>	shp->warn = "makeshape: shape is a vertical elliptical cylinder, which is not supported.\nmakeshape: replaced with circular cylinder\n";
1777	>	makecylshape(shp, w, h);
1778	>	} else {
1779	>	shp->warn = "makeshape: shape is a vertical elliptical cylinder, which is not supported.\nmakeshape: replaced with box\n";
1780	>	makeboxshape(shp, w, l, h);
1781	>	}
1782	>	}
1783	>
1784	>	void
1785	>	shapearea(SRCINFO *shp) {
1786		switch (shp->type) {
1787		case RECT:
1788		shp->area = shp->w * shp->l;
#	Line 1334 \| Line 1792 \| makeshape(
1792		shp->area = PI/4. * shp->w * shp->w;
1793		break;
1794		}
1795	<	return(0);
1338	<	}
1795	>	}
1796
1797		/* Rectangular or box-shaped light source.
1798		*

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Comparing ray/src/cv/ies2rad.c (file contents): Revision 2.34 by greg, Thu Sep 30 20:05:09 2021 UTC vs. Revision 2.35 by greg, Mon Nov 29 16:07:36 2021 UTC

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Comparing ray/src/cv/ies2rad.c (file contents):
Revision 2.34 by greg, Thu Sep 30 20:05:09 2021 UTC vs.
Revision 2.35 by greg, Mon Nov 29 16:07:36 2021 UTC