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root/radiance/ray/src/cv/mgflib/parser.h
Revision: 1.17
Committed: Fri Feb 24 16:50:05 1995 UTC (29 years, 2 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 1.16: +7 -7 lines
Log Message:
fixed context handlers for spectral power distribution data

File Contents

# User Rev Content
1 greg 1.1 /* Copyright (c) 1994 Regents of the University of California */
2    
3     /* SCCSid "$SunId$ LBL" */
4    
5     /*
6     * Header file for MGF interpreter
7     */
8    
9     /* must include stdio.h before us */
10    
11     /* Entities (order doesn't really matter) */
12     #define MG_E_COMMENT 0
13     #define MG_E_COLOR 1
14     #define MG_E_CONE 2
15 greg 1.5 #define MG_E_CMIX 3
16 greg 1.6 #define MG_E_CSPEC 4
17     #define MG_E_CXY 5
18 greg 1.5 #define MG_E_CYL 6
19     #define MG_E_ED 7
20     #define MG_E_FACE 8
21     #define MG_E_INCLUDE 9
22     #define MG_E_IES 10
23     #define MG_E_MATERIAL 11
24     #define MG_E_NORMAL 12
25     #define MG_E_OBJECT 13
26     #define MG_E_POINT 14
27     #define MG_E_PRISM 15
28     #define MG_E_RD 16
29     #define MG_E_RING 17
30     #define MG_E_RS 18
31 greg 1.13 #define MG_E_SIDES 19
32     #define MG_E_SPH 20
33     #define MG_E_TD 21
34     #define MG_E_TORUS 22
35     #define MG_E_TS 23
36     #define MG_E_VERTEX 24
37     #define MG_E_XF 25
38 greg 1.1
39 greg 1.13 #define MG_NENTITIES 26
40 greg 1.1
41 greg 1.5 #define MG_NAMELIST {"#","c","cone","cmix","cspec","cxy","cyl","ed","f",\
42     "i","ies","m","n","o","p","prism","rd","ring","rs",\
43 greg 1.13 "sides","sph","td","torus","ts","v","xf"}
44 greg 1.1
45     #define MG_MAXELEN 6
46    
47     extern char mg_ename[MG_NENTITIES][MG_MAXELEN];
48    
49     /* Handler routines for each entity */
50    
51     #ifdef NOPROTO
52     extern int (*mg_ehand[MG_NENTITIES])();
53     #else
54     extern int (*mg_ehand[MG_NENTITIES])(int argc, char **argv);
55     #endif
56    
57     /* Error codes */
58     #define MG_OK 0 /* normal return value */
59     #define MG_EUNK 1 /* unknown entity */
60     #define MG_EARGC 2 /* wrong number of arguments */
61     #define MG_ETYPE 3 /* argument type error */
62     #define MG_EILL 4 /* illegal argument value */
63     #define MG_EUNDEF 5 /* undefined reference */
64     #define MG_ENOFILE 6 /* cannot open input file */
65     #define MG_EINCL 7 /* error in included file */
66     #define MG_EMEM 8 /* out of memory */
67     #define MG_ESEEK 9 /* file seek error */
68 greg 1.2 #define MG_EBADMAT 10 /* bad material specification */
69 greg 1.1
70 greg 1.2 #define MG_NERRS 11
71 greg 1.1
72     extern char *mg_err[MG_NERRS];
73    
74     /*
75     * The general process for running the parser is to fill in the mg_ehand
76     * array with handlers for each entity you know how to handle.
77     * Then, call mg_init to fill in the rest. This function will report
78     * an error and quit if you try to support an inconsistent set of entities.
79     * For each file you want to parse, call mg_load with the file name.
80     * To read from standard input, use NULL as the file name.
81     * For additional control over error reporting and file management,
82     * use mg_open, mg_read, mg_parse and mg_close instead of mg_load.
83 greg 1.10 * To pass an entity of your own construction to the parser, use
84     * the mg_handle function rather than the mg_ehand routines directly.
85     * (The first argument to mg_handle is the entity #, or -1.)
86 greg 1.1 * To free any data structures and clear the parser, use mg_clear.
87 greg 1.15 * If there is an error, mg_load, mg_open, mg_parse, mg_handle and
88     * mg_rewind will return an error from the list above. In addition,
89     * mg_load will report the error to stderr. The mg_read routine
90     * returns 0 when the end of file has been reached.
91 greg 1.1 */
92    
93 greg 1.17 #define MG_MAXLINE 4096 /* maximum input line length */
94 greg 1.1 #define MG_MAXARGC (MG_MAXLINE/4) /* maximum argument count */
95    
96     typedef struct mg_fctxt {
97 greg 1.7 char fname[96]; /* file name */
98 greg 1.1 FILE *fp; /* stream pointer */
99 greg 1.10 int fid; /* unique file context id */
100 greg 1.1 char inpline[MG_MAXLINE]; /* input line */
101     int lineno; /* line number */
102     struct mg_fctxt *prev; /* previous context */
103     } MG_FCTXT;
104    
105 greg 1.10 typedef struct {
106     int fid; /* file this position is for */
107     int lineno; /* line number in file */
108     long offset; /* offset from beginning */
109     } MG_FPOS;
110    
111 greg 1.1 extern MG_FCTXT *mg_file; /* current file context */
112    
113     #ifdef NOPROTO
114     extern void mg_init(); /* fill in mg_ehand array */
115     extern int mg_load(); /* parse a file */
116     extern int mg_open(); /* open new input file */
117     extern int mg_read(); /* read next line */
118     extern int mg_parse(); /* parse current line */
119 greg 1.10 extern void mg_fgetpos(); /* get position on input file */
120     extern int mg_fgoto(); /* go to position on input file */
121 greg 1.1 extern void mg_close(); /* close input file */
122     extern void mg_clear(); /* clear parser */
123 greg 1.10 extern int mg_handle(); /* handle an entity */
124 greg 1.1 #else
125     extern void mg_init(void); /* fill in mg_ehand array */
126     extern int mg_load(char *); /* parse a file */
127     extern int mg_open(MG_FCTXT *, char *); /* open new input file */
128     extern int mg_read(void); /* read next line */
129     extern int mg_parse(void); /* parse current line */
130 greg 1.10 extern void mg_fgetpos(MG_FPOS *); /* get position on input file */
131     extern int mg_fgoto(MG_FPOS *); /* go to position on input file */
132 greg 1.1 extern void mg_close(void); /* close input file */
133     extern void mg_clear(void); /* clear parser */
134 greg 1.10 extern int mg_handle(int, int, char **); /* handle an entity */
135 greg 1.1 #endif
136    
137     #ifndef MG_NQCD
138     #define MG_NQCD 5 /* default number of divisions */
139     #endif
140    
141     extern int mg_nqcdivs; /* divisions per quarter circle */
142    
143     /*
144     * The following library routines are included for your convenience:
145     */
146    
147     #ifdef NOPROTO
148     extern int mg_entity(); /* get entity number from its name */
149     extern int isint(); /* non-zero if integer format */
150     extern int isflt(); /* non-zero if floating point format */
151     #else
152     extern int mg_entity(char *); /* get entity number from its name */
153     extern int isint(char *); /* non-zero if integer format */
154     extern int isflt(char *); /* non-zero if floating point format */
155     #endif
156    
157     /************************************************************************
158     * Definitions for 3-d vector manipulation functions
159     */
160    
161 greg 1.3 #ifdef SMLFLT
162     #define FLOAT float
163     #define FTINY (1e-3)
164 greg 1.2 #else
165 greg 1.3 #define FLOAT double
166     #define FTINY (1e-6)
167 greg 1.2 #endif
168 greg 1.3 #define FHUGE (1e10)
169 greg 1.1
170 greg 1.2 typedef FLOAT FVECT[3];
171    
172 greg 1.3 #define VCOPY(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2])
173     #define DOT(v1,v2) ((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2])
174     #define VSUM(vr,v1,v2,f) ((vr)[0]=(v1)[0]+(f)*(v2)[0], \
175     (vr)[1]=(v1)[1]+(f)*(v2)[1], \
176     (vr)[2]=(v1)[2]+(f)*(v2)[2])
177    
178 greg 1.6 #define is0vect(v) (DOT(v,v) <= FTINY*FTINY)
179 greg 1.3
180     #define round0(x) if (x <= FTINY && x >= -FTINY) x = 0
181    
182 greg 1.1 #ifdef NOPROTO
183     extern double normalize(); /* normalize a vector */
184     #else
185     extern double normalize(FVECT); /* normalize a vector */
186     #endif
187    
188     /************************************************************************
189     * Definitions for context handling routines
190     * (materials, colors, vectors)
191     */
192    
193 greg 1.6 #define C_CMINWL 380 /* minimum wavelength */
194 greg 1.5 #define C_CMAXWL 780 /* maximum wavelength */
195     #define C_CNSS 41 /* number of spectral samples */
196 greg 1.6 #define C_CWLI ((C_CMAXWL-C_CMINWL)/(C_CNSS-1))
197 greg 1.5 #define C_CMAXV 10000 /* nominal maximum sample value */
198 greg 1.16 #define C_CLPWM (683./C_CMAXV) /* peak lumens/watt multiplier */
199 greg 1.5
200 greg 1.6 #define C_CSSPEC 01 /* flag if spectrum is set */
201     #define C_CDSPEC 02 /* flag if defined w/ spectrum */
202     #define C_CSXY 04 /* flag if xy is set */
203     #define C_CDXY 010 /* flag if defined w/ xy */
204 greg 1.16 #define C_CSEFF 020 /* flag if efficacy set */
205 greg 1.5
206 greg 1.1 typedef struct {
207 greg 1.8 int clock; /* incremented each change */
208 greg 1.17 unsigned short flags; /* what's been set */
209     unsigned short ssamp[C_CNSS]; /* spectral samples, min wl to max */
210     unsigned long ssum; /* straight sum of spectral values */
211 greg 1.6 float cx, cy; /* xy chromaticity value */
212 greg 1.16 float eff; /* efficacy (lumens/watt) */
213 greg 1.5 } C_COLOR;
214    
215 greg 1.16 #define C_DEFCOLOR { 1, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\
216 greg 1.5 {C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
217     C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
218     C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
219     C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
220     C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
221     C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
222     C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV},\
223 greg 1.16 (long)C_CNSS*C_CMAXV, 1./3., 1./3., 178.006 }
224 greg 1.5
225 greg 1.16 #define C_CIEX { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF,\
226 greg 1.5 {14,42,143,435,1344,2839,3483,3362,2908,1954,956,\
227     320,49,93,633,1655,2904,4334,5945,7621,9163,10263,\
228     10622,10026,8544,6424,4479,2835,1649,874,468,227,\
229 greg 1.17 114,58,29,14,7,3,2,1,0}, 106836L, .467, .368, 362.230 }
230 greg 1.5
231 greg 1.16 #define C_CIEY { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF,\
232 greg 1.5 {0,1,4,12,40,116,230,380,600,910,1390,2080,3230,\
233     5030,7100,8620,9540,9950,9950,9520,8700,7570,6310,\
234     5030,3810,2650,1750,1070,610,320,170,82,41,21,10,\
235 greg 1.17 5,2,1,1,0,0}, 106856L, .398, .542, 493.525 }
236 greg 1.5
237 greg 1.16 #define C_CIEZ { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF,\
238 greg 1.5 {65,201,679,2074,6456,13856,17471,17721,16692,\
239     12876,8130,4652,2720,1582,782,422,203,87,39,21,17,\
240 greg 1.6 11,8,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},\
241 greg 1.17 106770L, .147, .077, 54.363 }
242 greg 1.5
243 greg 1.15 #define c_cval(c,l) ((double)(c)->ssamp[((l)-C_MINWL)/C_CWLI] / (c)->ssum)
244 greg 1.5
245     typedef struct {
246 greg 1.2 int clock; /* incremented each change -- resettable */
247 greg 1.13 int sided; /* 1 if surface is 1-sided, 0 for 2-sided */
248 greg 1.2 float rd; /* diffuse reflectance */
249 greg 1.1 C_COLOR rd_c; /* diffuse reflectance color */
250 greg 1.2 float td; /* diffuse transmittance */
251 greg 1.1 C_COLOR td_c; /* diffuse transmittance color */
252 greg 1.2 float ed; /* diffuse emittance */
253 greg 1.1 C_COLOR ed_c; /* diffuse emittance color */
254 greg 1.2 float rs; /* specular reflectance */
255 greg 1.1 C_COLOR rs_c; /* specular reflectance color */
256 greg 1.2 float rs_a; /* specular reflectance roughness */
257     float ts; /* specular transmittance */
258 greg 1.1 C_COLOR ts_c; /* specular transmittance color */
259 greg 1.2 float ts_a; /* specular transmittance roughness */
260 greg 1.1 } C_MATERIAL; /* material context */
261    
262     typedef struct {
263 greg 1.8 int clock; /* incremented each change -- resettable */
264 greg 1.1 FVECT p, n; /* point and normal */
265     } C_VERTEX; /* vertex context */
266 greg 1.3
267 greg 1.13 #define C_DEFMATERIAL {1,0,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\
268 greg 1.2 0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.}
269 greg 1.12 #define C_DEFVERTEX {1,{0.,0.,0.},{0.,0.,0.}}
270 greg 1.1
271     extern C_COLOR *c_ccolor; /* the current color */
272 greg 1.12 extern char *c_ccname; /* current color name */
273 greg 1.1 extern C_MATERIAL *c_cmaterial; /* the current material */
274 greg 1.12 extern char *c_cmname; /* current material name */
275 greg 1.1 extern C_VERTEX *c_cvertex; /* the current vertex */
276 greg 1.12 extern char *c_cvname; /* current vertex name */
277 greg 1.1
278     #ifdef NOPROTO
279     extern int c_hcolor(); /* handle color entity */
280     extern int c_hmaterial(); /* handle material entity */
281     extern int c_hvertex(); /* handle vertex entity */
282     extern void c_clearall(); /* clear context tables */
283 greg 1.11 extern C_MATERIAL *c_getmaterial(); /* get a named material */
284 greg 1.1 extern C_VERTEX *c_getvert(); /* get a named vertex */
285 greg 1.7 extern C_COLOR *c_getcolor(); /* get a named color */
286 greg 1.6 extern void c_ccvt(); /* fix color representation */
287     extern int c_isgrey(); /* check if color is grey */
288 greg 1.1 #else
289     extern int c_hcolor(int, char **); /* handle color entity */
290     extern int c_hmaterial(int, char **); /* handle material entity */
291     extern int c_hvertex(int, char **); /* handle vertex entity */
292     extern void c_clearall(void); /* clear context tables */
293 greg 1.11 extern C_MATERIAL *c_getmaterial(char *); /* get a named material */
294 greg 1.1 extern C_VERTEX *c_getvert(char *); /* get a named vertex */
295 greg 1.7 extern C_COLOR *c_getcolor(char *); /* get a named color */
296 greg 1.6 extern void c_ccvt(C_COLOR *, int); /* fix color representation */
297     extern int c_isgrey(C_COLOR *); /* check if color is grey */
298 greg 1.1 #endif
299    
300     /*************************************************************************
301     * Definitions for hierarchical object name handler
302     */
303    
304     extern int obj_nnames; /* depth of name hierarchy */
305     extern char **obj_name; /* names in hierarchy */
306    
307     #ifdef NOPROTO
308     extern int obj_handler(); /* handle an object entity */
309 greg 1.2 extern void obj_clear(); /* clear object stack */
310 greg 1.1 #else
311     extern int obj_handler(int, char **); /* handle an object entity */
312 greg 1.2 extern void obj_clear(void); /* clear object stack */
313 greg 1.1 #endif
314    
315     /**************************************************************************
316     * Definitions for hierarchical transformation handler
317     */
318    
319 greg 1.2 typedef FLOAT MAT4[4][4];
320 greg 1.1
321     #ifdef BSD
322     #define copymat4(m4a,m4b) bcopy((char *)m4b,(char *)m4a,sizeof(MAT4))
323     #else
324     #define copymat4(m4a,m4b) (void)memcpy((char *)m4a,(char *)m4b,sizeof(MAT4))
325     #endif
326    
327     #define MAT4IDENT { {1.,0.,0.,0.}, {0.,1.,0.,0.}, \
328     {0.,0.,1.,0.}, {0.,0.,0.,1.} }
329    
330     extern MAT4 m4ident;
331    
332     #define setident4(m4) copymat4(m4, m4ident)
333    
334     /* regular transformation */
335     typedef struct {
336 greg 1.14 MAT4 xfm; /* transform matrix */
337     FLOAT sca; /* scalefactor */
338 greg 1.1 } XF;
339    
340     #define identxf(xp) (void)(setident4((xp)->xfm),(xp)->sca=1.0)
341    
342 greg 1.10 #define XF_MAXDIM 8 /* maximum array dimensions */
343    
344     struct xf_array {
345     MG_FPOS spos; /* starting position on input */
346     int ndim; /* number of array dimensions */
347     struct {
348     short i, n; /* current count and maximum */
349     char arg[8]; /* string argument value */
350     } aarg[XF_MAXDIM];
351     };
352    
353 greg 1.1 typedef struct xf_spec {
354 greg 1.10 long xid; /* unique transform id */
355     short xav0; /* zeroeth argument in xf_argv array */
356     short xac; /* transform argument count */
357 greg 1.14 short rev; /* boolean true if vertices reversed */
358 greg 1.10 XF xf; /* cumulative transformation */
359     struct xf_array *xarr; /* transformation array pointer */
360     struct xf_spec *prev; /* previous transformation context */
361     } XF_SPEC; /* followed by argument buffer */
362 greg 1.1
363     extern int xf_argc; /* total # transform args. */
364     extern char **xf_argv; /* transform arguments */
365     extern XF_SPEC *xf_context; /* current context */
366    
367     /*
368     * The transformation handler should do most of the work that needs
369     * doing. Just pass it any xf entities, then use the associated
370     * functions to transform and translate points, transform vectors
371     * (without translation), rotate vectors (without scaling) and scale
372     * values appropriately.
373     *
374     * The routines xf_xfmpoint, xf_xfmvect and xf_rotvect take two
375     * 3-D vectors (which may be identical), transforms the second and
376     * puts the result into the first.
377     */
378    
379     #ifdef NOPROTO
380    
381     extern int xf_handler(); /* handle xf entity */
382     extern void xf_xfmpoint(); /* transform point */
383     extern void xf_xfmvect(); /* transform vector */
384     extern void xf_rotvect(); /* rotate vector */
385     extern double xf_scale(); /* scale a value */
386 greg 1.2 extern void xf_clear(); /* clear xf stack */
387 greg 1.1
388     /* The following are support routines you probably won't call directly */
389    
390     extern void multmat4(); /* m4a = m4b X m4c */
391     extern void multv3(); /* v3a = v3b X m4 (vectors) */
392     extern void multp3(); /* p3a = p3b X m4 (points) */
393     extern int xf(); /* interpret transform spec. */
394    
395     #else
396    
397 greg 1.2 extern int xf_handler(int, char **); /* handle xf entity */
398     extern void xf_xfmpoint(FVECT, FVECT); /* transform point */
399     extern void xf_xfmvect(FVECT, FVECT); /* transform vector */
400     extern void xf_rotvect(FVECT, FVECT); /* rotate vector */
401     extern double xf_scale(double); /* scale a value */
402     extern void xf_clear(void); /* clear xf stack */
403 greg 1.1
404     /* The following are support routines you probably won't call directly */
405    
406     extern void multmat4(MAT4, MAT4, MAT4); /* m4a = m4b X m4c */
407     extern void multv3(FVECT, FVECT, MAT4); /* v3a = v3b X m4 (vectors) */
408     extern void multp3(FVECT, FVECT, MAT4); /* p3a = p3b X m4 (points) */
409 greg 1.6 extern int xf(XF *, int, char **); /* interpret transform spec. */
410 greg 1.1
411     #endif
412    
413     /************************************************************************
414     * Miscellaneous definitions
415     */
416    
417     #ifdef M_PI
418     #define PI M_PI
419     #else
420     #define PI 3.14159265358979323846
421     #endif
422    
423     #ifdef DCL_ATOF
424     extern double atof();
425     #endif
426    
427     #ifndef MEM_PTR
428     #define MEM_PTR void *
429     #endif
430    
431     extern MEM_PTR malloc();
432     extern MEM_PTR calloc();
433     extern MEM_PTR realloc();
434 greg 1.4 extern void free();