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root/radiance/ray/src/cv/mgflib/parser.h
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Comparing ray/src/cv/mgflib/parser.h (file contents):
Revision 1.2 by greg, Wed Jun 22 15:33:42 1994 UTC vs.
Revision 1.26 by greg, Wed Nov 8 09:40:26 1995 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1994 Regents of the University of California */
1 > /* Copyright (c) 1995 Regents of the University of California */
2  
3   /* SCCSid "$SunId$ LBL" */
4  
# Line 8 | Line 8
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 < #define MG_E_CXY        3
16 < #define MG_E_CYL        4
17 < #define MG_E_ED         5
18 < #define MG_E_FACE       6
19 < #define MG_E_INCLUDE    7
20 < #define MG_E_IES        8
21 < #define MG_E_MATERIAL   9
22 < #define MG_E_NORMAL     10
23 < #define MG_E_OBJECT     11
24 < #define MG_E_POINT      12
25 < #define MG_E_RD         13
26 < #define MG_E_RING       14
27 < #define MG_E_RS         15
28 < #define MG_E_SPH        16
29 < #define MG_E_TD         17
30 < #define MG_E_TORUS      18
31 < #define MG_E_TS         19
32 < #define MG_E_VERTEX     20
33 < #define MG_E_XF         21
11 > #define MG_VMAJOR       1               /* major version number */
12 > #define MG_VMINOR       0               /* minor version number */
13  
14 < #define MG_NENTITIES    22
14 >                        /* Entities (list is only appended, never modified) */
15 > #define MG_E_COMMENT    0               /* #            */
16 > #define MG_E_COLOR      1               /* c            */
17 > #define MG_E_CCT        2               /* cct          */
18 > #define MG_E_CONE       3               /* cone         */
19 > #define MG_E_CMIX       4               /* cmix         */
20 > #define MG_E_CSPEC      5               /* cspec        */
21 > #define MG_E_CXY        6               /* cxy          */
22 > #define MG_E_CYL        7               /* cyl          */
23 > #define MG_E_ED         8               /* ed           */
24 > #define MG_E_FACE       9               /* f            */
25 > #define MG_E_INCLUDE    10              /* i            */
26 > #define MG_E_IES        11              /* ies          */
27 > #define MG_E_IR         12              /* ir           */
28 > #define MG_E_MATERIAL   13              /* m            */
29 > #define MG_E_NORMAL     14              /* n            */
30 > #define MG_E_OBJECT     15              /* o            */
31 > #define MG_E_POINT      16              /* p            */
32 > #define MG_E_PRISM      17              /* prism        */
33 > #define MG_E_RD         18              /* rd           */
34 > #define MG_E_RING       19              /* ring         */
35 > #define MG_E_RS         20              /* rs           */
36 > #define MG_E_SIDES      21              /* sides        */
37 > #define MG_E_SPH        22              /* sph          */
38 > #define MG_E_TD         23              /* td           */
39 > #define MG_E_TORUS      24              /* torus        */
40 > #define MG_E_TS         25              /* ts           */
41 > #define MG_E_VERTEX     26              /* v            */
42 > #define MG_E_XF         27              /* xf           */
43 >                        /* end of Version 1 entities */
44  
45 < #define MG_NAMELIST     {"#","c","cone","cxy","cyl","ed","f","i","ies",\
38 <        "m","n","o","p","rd","ring","rs","sph","td","torus","ts","v","xf"}
45 > #define MG_NENTITIES    28              /* total # entities */
46  
47 + #define MG_NELIST       {28}            /* entity count for version 1 and up */
48 +
49 + #define MG_NAMELIST     {"#","c","cct","cone","cmix","cspec","cxy","cyl","ed",\
50 +                        "f","i","ies","ir","m","n","o","p","prism","rd",\
51 +                        "ring","rs","sides","sph","td","torus","ts","v","xf"}
52 +
53   #define MG_MAXELEN      6
54  
55   extern char     mg_ename[MG_NENTITIES][MG_MAXELEN];
56  
57 <                        /* Handler routines for each entity */
45 <
57 >                        /* Handler routines for each entity and unknown ones */
58   #ifdef NOPROTO
59   extern int      (*mg_ehand[MG_NENTITIES])();
60 + extern int      (*mg_uhand)();
61 + extern int      mg_defuhand();
62   #else
63   extern int      (*mg_ehand[MG_NENTITIES])(int argc, char **argv);
64 + extern int      (*mg_uhand)(int argc, char **argv);
65 + extern int      mg_defuhand(int, char **);
66   #endif
67  
68 + extern unsigned mg_nunknown;            /* count of unknown entities */
69 +
70                          /* Error codes */
71   #define MG_OK           0               /* normal return value */
72   #define MG_EUNK         1               /* unknown entity */
# Line 61 | Line 79 | extern int     (*mg_ehand[MG_NENTITIES])(int argc, char **
79   #define MG_EMEM         8               /* out of memory */
80   #define MG_ESEEK        9               /* file seek error */
81   #define MG_EBADMAT      10              /* bad material specification */
82 + #define MG_ELINE        11              /* input line too long */
83  
84 < #define MG_NERRS        11
84 > #define MG_NERRS        12
85  
86 < extern char     *mg_err[MG_NERRS];
86 > extern char     *mg_err[MG_NERRS];      /* list of error messages */
87  
88   /*
89   * The general process for running the parser is to fill in the mg_ehand
# Line 75 | Line 94 | extern char    *mg_err[MG_NERRS];
94   * To read from standard input, use NULL as the file name.
95   * For additional control over error reporting and file management,
96   * use mg_open, mg_read, mg_parse and mg_close instead of mg_load.
97 + * To pass an entity of your own construction to the parser, use
98 + * the mg_handle function rather than the mg_ehand routines directly.
99 + * (The first argument to mg_handle is the entity #, or -1.)
100   * To free any data structures and clear the parser, use mg_clear.
101 < * If there is an error, mg_load, mg_open, mg_parse, and mg_rewind
102 < * will return an error from the list above.  In addition, mg_load
103 < * will report the error to stderr.  The mg_read routine returns 0
104 < * when the end of file has been reached.
101 > * If there is an error, mg_load, mg_open, mg_parse, mg_handle and
102 > * mg_fgoto will return an error from the list above.  In addition,
103 > * mg_load will report the error to stderr.  The mg_read routine
104 > * returns 0 when the end of file has been reached.
105   */
106  
107 < #define MG_MAXLINE      512             /* maximum input line length */
107 > #define MG_MAXLINE      4096            /* maximum input line length */
108   #define MG_MAXARGC      (MG_MAXLINE/4)  /* maximum argument count */
109  
110   typedef struct mg_fctxt {
111 <        char    *fname;                         /* file name */
111 >        char    fname[96];                      /* file name */
112          FILE    *fp;                            /* stream pointer */
113 +        int     fid;                            /* unique file context id */
114          char    inpline[MG_MAXLINE];            /* input line */
115          int     lineno;                         /* line number */
116          struct mg_fctxt *prev;                  /* previous context */
117   } MG_FCTXT;
118  
119 + typedef struct {
120 +        int     fid;                            /* file this position is for */
121 +        int     lineno;                         /* line number in file */
122 +        long    offset;                         /* offset from beginning */
123 + } MG_FPOS;
124 +
125   extern MG_FCTXT *mg_file;               /* current file context */
126  
127   #ifdef NOPROTO
# Line 101 | Line 130 | extern int     mg_load();              /* parse a file */
130   extern int      mg_open();              /* open new input file */
131   extern int      mg_read();              /* read next line */
132   extern int      mg_parse();             /* parse current line */
133 < extern int      mg_rewind();            /* rewind input file */
133 > extern void     mg_fgetpos();           /* get position on input file */
134 > extern int      mg_fgoto();             /* go to position on input file */
135   extern void     mg_close();             /* close input file */
136   extern void     mg_clear();             /* clear parser */
137 < extern int      mg_iterate();
137 > extern int      mg_handle();            /* handle an entity */
138   #else
139   extern void     mg_init(void);          /* fill in mg_ehand array */
140   extern int      mg_load(char *);        /* parse a file */
141   extern int      mg_open(MG_FCTXT *, char *);    /* open new input file */
142   extern int      mg_read(void);          /* read next line */
143   extern int      mg_parse(void);         /* parse current line */
144 < extern int      mg_rewind(void);        /* rewind input file */
144 > extern void     mg_fgetpos(MG_FPOS *);  /* get position on input file */
145 > extern int      mg_fgoto(MG_FPOS *);    /* go to position on input file */
146   extern void     mg_close(void);         /* close input file */
147   extern void     mg_clear(void);         /* clear parser */
148 < extern int      mg_iterate(int, char **, int (*)(void));
148 > extern int      mg_handle(int, int, char **);   /* handle an entity */
149   #endif
150  
151   #ifndef MG_NQCD
# Line 131 | Line 162 | extern int     mg_nqcdivs;             /* divisions per quarter circl
162   extern int mg_entity();                 /* get entity number from its name */
163   extern int isint();                     /* non-zero if integer format */
164   extern int isflt();                     /* non-zero if floating point format */
165 + extern int isname();                    /* non-zero if legal identifier name */
166   #else
167   extern int mg_entity(char *);           /* get entity number from its name */
168   extern int isint(char *);               /* non-zero if integer format */
169   extern int isflt(char *);               /* non-zero if floating point format */
170 + extern int isname(char *);              /* non-zero if legal identifier name */
171   #endif
172  
173   /************************************************************************
174   *      Definitions for 3-d vector manipulation functions
175   */
176  
177 < #ifdef SMLFLT
178 < #define FLOAT   float
177 > #ifdef  SMLFLT
178 > #define  FLOAT          float
179 > #define  FTINY          (1e-3)
180   #else
181 < #define FLOAT   double
181 > #define  FLOAT          double
182 > #define  FTINY          (1e-6)
183   #endif
184 + #define  FHUGE          (1e10)
185  
186   typedef FLOAT  FVECT[3];
187  
188 + #define  VCOPY(v1,v2)   ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2])
189 + #define  DOT(v1,v2)     ((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2])
190 + #define  VSUM(vr,v1,v2,f)       ((vr)[0]=(v1)[0]+(f)*(v2)[0], \
191 +                                (vr)[1]=(v1)[1]+(f)*(v2)[1], \
192 +                                (vr)[2]=(v1)[2]+(f)*(v2)[2])
193 +
194 + #define is0vect(v)      (DOT(v,v) <= FTINY*FTINY)
195 +
196 + #define round0(x)       if (x <= FTINY && x >= -FTINY) x = 0
197 +
198   #ifdef NOPROTO
199   extern double   normalize();            /* normalize a vector */
200   #else
# Line 160 | Line 206 | extern double  normalize(FVECT);       /* normalize a vector
206   *      (materials, colors, vectors)
207   */
208  
209 + #define C_CMINWL        380             /* minimum wavelength */
210 + #define C_CMAXWL        780             /* maximum wavelength */
211 + #define C_CNSS          41              /* number of spectral samples */
212 + #define C_CWLI          ((C_CMAXWL-C_CMINWL)/(C_CNSS-1))
213 + #define C_CMAXV         10000           /* nominal maximum sample value */
214 + #define C_CLPWM         (683./C_CMAXV)  /* peak lumens/watt multiplier */
215 +
216 + #define C_CSSPEC        01              /* flag if spectrum is set */
217 + #define C_CDSPEC        02              /* flag if defined w/ spectrum */
218 + #define C_CSXY          04              /* flag if xy is set */
219 + #define C_CDXY          010             /* flag if defined w/ xy */
220 + #define C_CSEFF         020             /* flag if efficacy set */
221 +
222   typedef struct {
223 <        float   cx, cy;         /* XY chromaticity coordinates */
224 < } C_COLOR;              /* color context */
223 >        int     clock;                  /* incremented each change */
224 >        short   flags;                  /* what's been set */
225 >        short   ssamp[C_CNSS];          /* spectral samples, min wl to max */
226 >        long    ssum;                   /* straight sum of spectral values */
227 >        float   cx, cy;                 /* xy chromaticity value */
228 >        float   eff;                    /* efficacy (lumens/watt) */
229 > } C_COLOR;
230  
231 + #define C_DEFCOLOR      { 1, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\
232 +                        {C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
233 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
234 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
235 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
236 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
237 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
238 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV},\
239 +                        (long)C_CNSS*C_CMAXV, 1./3., 1./3., 178.006 }
240 +
241 + #define c_cval(c,l)     ((double)(c)->ssamp[((l)-C_MINWL)/C_CWLI] / (c)->ssum)
242 +
243 + #define C_1SIDEDTHICK   0.005           /* assumed thickness of 1-sided mat. */
244 +
245   typedef struct {
168 –        char    *name;          /* material name */
246          int     clock;          /* incremented each change -- resettable */
247 +        int     sided;          /* 1 if surface is 1-sided, 0 for 2-sided */
248 +        float   nr, ni;         /* index of refraction, real and imaginary */
249          float   rd;             /* diffuse reflectance */
250          C_COLOR rd_c;           /* diffuse reflectance color */
251          float   td;             /* diffuse transmittance */
# Line 182 | Line 261 | typedef struct {
261   } C_MATERIAL;           /* material context */
262  
263   typedef struct {
264 +        int     clock;          /* incremented each change -- resettable */
265          FVECT   p, n;           /* point and normal */
266   } C_VERTEX;             /* vertex context */
267  
268 < #define C_DEFCOLOR      {.333,.333}
189 < #define C_DEFMATERIAL   {NULL,1,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\
268 > #define C_DEFMATERIAL   {1,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\
269                                          0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.}
270 < #define C_DEFVERTEX     {{0.,0.,0.},{0.,0.,0.}}
270 > #define C_DEFVERTEX     {1,{0.,0.,0.},{0.,0.,0.}}
271  
272   extern C_COLOR          *c_ccolor;      /* the current color */
273 + extern char             *c_ccname;      /* current color name */
274   extern C_MATERIAL       *c_cmaterial;   /* the current material */
275 + extern char             *c_cmname;      /* current material name */
276   extern C_VERTEX         *c_cvertex;     /* the current vertex */
277 + extern char             *c_cvname;      /* current vertex name */
278  
279   #ifdef NOPROTO
280   extern int      c_hcolor();                     /* handle color entity */
281   extern int      c_hmaterial();                  /* handle material entity */
282   extern int      c_hvertex();                    /* handle vertex entity */
283   extern void     c_clearall();                   /* clear context tables */
284 + extern C_MATERIAL       *c_getmaterial();       /* get a named material */
285   extern C_VERTEX *c_getvert();                   /* get a named vertex */
286 + extern C_COLOR  *c_getcolor();                  /* get a named color */
287 + extern void     c_ccvt();                       /* fix color representation */
288 + extern int      c_isgrey();                     /* check if color is grey */
289   #else
290   extern int      c_hcolor(int, char **);         /* handle color entity */
291   extern int      c_hmaterial(int, char **);      /* handle material entity */
292   extern int      c_hvertex(int, char **);        /* handle vertex entity */
293   extern void     c_clearall(void);               /* clear context tables */
294 + extern C_MATERIAL       *c_getmaterial(char *); /* get a named material */
295   extern C_VERTEX *c_getvert(char *);             /* get a named vertex */
296 + extern C_COLOR  *c_getcolor(char *);            /* get a named color */
297 + extern void     c_ccvt(C_COLOR *, int);         /* fix color representation */
298 + extern int      c_isgrey(C_COLOR *);            /* check if color is grey */
299   #endif
300  
301   /*************************************************************************
# Line 233 | Line 323 | typedef FLOAT  MAT4[4][4];
323   #define  copymat4(m4a,m4b)      bcopy((char *)m4b,(char *)m4a,sizeof(MAT4))
324   #else
325   #define  copymat4(m4a,m4b)      (void)memcpy((char *)m4a,(char *)m4b,sizeof(MAT4))
236 – extern char  *memcpy();
326   #endif
327  
328   #define  MAT4IDENT              { {1.,0.,0.,0.}, {0.,1.,0.,0.}, \
# Line 245 | Line 334 | extern MAT4  m4ident;
334  
335                                  /* regular transformation */
336   typedef struct {
337 <        MAT4  xfm;                              /* transform matrix */
338 <        FLOAT  sca;                             /* scalefactor */
337 >        MAT4    xfm;                            /* transform matrix */
338 >        FLOAT   sca;                            /* scalefactor */
339   }  XF;
340  
341   #define identxf(xp)             (void)(setident4((xp)->xfm),(xp)->sca=1.0)
342  
343 + #define XF_MAXDIM       8               /* maximum array dimensions */
344 +
345 + struct xf_array {
346 +        MG_FPOS spos;                   /* starting position on input */
347 +        int     ndim;                   /* number of array dimensions */
348 +        struct {
349 +                short   i, n;           /* current count and maximum */
350 +                char    arg[8];         /* string argument value */
351 +        } aarg[XF_MAXDIM];
352 + };
353 +
354   typedef struct xf_spec {
355 <        short   xac;            /* transform argument count */
356 <        short   xav0;           /* zeroeth argument in xf_argv array */
357 <        XF      xf;             /* cumulative transformation */
358 <        struct xf_spec  *prev;  /* previous transformation context */
359 < } XF_SPEC;
355 >        long    xid;                    /* unique transform id */
356 >        short   xac;                    /* context argument count */
357 >        short   rev;                    /* boolean true if vertices reversed */
358 >        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  
363 < extern int      xf_argc;                        /* total # transform args. */
364 < extern char     **xf_argv;                      /* transform arguments */
263 < extern XF_SPEC  *xf_context;                    /* current context */
363 > extern XF_SPEC  *xf_context;                    /* current transform context */
364 > extern char     **xf_argend;                    /* last transform argument */
365  
366 + #define xf_ac(xf)       ((xf)->xac)
367 + #define xf_av(xf)       (xf_argend - (xf)->xac)
368 +
369 + #define xf_argc         (xf_context==NULL ? 0 : xf_ac(xf_context))
370 + #define xf_argv         xf_av(xf_context)
371 +
372   /*
373   * The transformation handler should do most of the work that needs
374   * doing.  Just pass it any xf entities, then use the associated
# Line 304 | Line 411 | extern void    xf_clear(void);                 /* clear xf stack */
411   extern void     multmat4(MAT4, MAT4, MAT4);     /* m4a = m4b X m4c */
412   extern void     multv3(FVECT, FVECT, MAT4);     /* v3a = v3b X m4 (vectors) */
413   extern void     multp3(FVECT, FVECT, MAT4);     /* p3a = p3b X m4 (points) */
414 < extern int      xf(XF, int, char **);           /* interpret transform spec. */
414 > extern int      xf(XF *, int, char **);         /* interpret transform spec. */
415  
416   #endif
417  
# Line 329 | Line 436 | extern double  atof();
436   extern MEM_PTR  malloc();
437   extern MEM_PTR  calloc();
438   extern MEM_PTR  realloc();
439 + extern void     free();

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