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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 1.4 by greg, Thu Jun 23 07:48:36 1994 UTC vs.
Revision 1.24 by greg, Thu May 11 20:17:36 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 9 | Line 9
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
12 > #define MG_E_COMMENT    0               /* #            */
13 > #define MG_E_COLOR      1               /* c            */
14 > #define MG_E_CCT        2               /* cct          */
15 > #define MG_E_CONE       3               /* cone         */
16 > #define MG_E_CMIX       4               /* cmix         */
17 > #define MG_E_CSPEC      5               /* cspec        */
18 > #define MG_E_CXY        6               /* cxy          */
19 > #define MG_E_CYL        7               /* cyl          */
20 > #define MG_E_ED         8               /* ed           */
21 > #define MG_E_FACE       9               /* f            */
22 > #define MG_E_INCLUDE    10              /* i            */
23 > #define MG_E_IES        11              /* ies          */
24 > #define MG_E_IR         12              /* ir           */
25 > #define MG_E_MATERIAL   13              /* m            */
26 > #define MG_E_NORMAL     14              /* n            */
27 > #define MG_E_OBJECT     15              /* o            */
28 > #define MG_E_POINT      16              /* p            */
29 > #define MG_E_PRISM      17              /* prism        */
30 > #define MG_E_RD         18              /* rd           */
31 > #define MG_E_RING       19              /* ring         */
32 > #define MG_E_RS         20              /* rs           */
33 > #define MG_E_SIDES      21              /* sides        */
34 > #define MG_E_SPH        22              /* sph          */
35 > #define MG_E_TD         23              /* td           */
36 > #define MG_E_TORUS      24              /* torus        */
37 > #define MG_E_TS         25              /* ts           */
38 > #define MG_E_VERTEX     26              /* v            */
39 > #define MG_E_XF         27              /* xf           */
40  
41 < #define MG_NENTITIES    22
41 > #define MG_NENTITIES    28              /* total # entities */
42  
43 < #define MG_NAMELIST     {"#","c","cone","cxy","cyl","ed","f","i","ies",\
44 <        "m","n","o","p","rd","ring","rs","sph","td","torus","ts","v","xf"}
43 > #define MG_NAMELIST     {"#","c","cct","cone","cmix","cspec","cxy","cyl","ed",\
44 >                        "f","i","ies","ir","m","n","o","p","prism","rd",\
45 >                        "ring","rs","sides","sph","td","torus","ts","v","xf"}
46  
47   #define MG_MAXELEN      6
48  
49   extern char     mg_ename[MG_NENTITIES][MG_MAXELEN];
50  
51 <                        /* Handler routines for each entity */
51 >                        /* Handler routines for each entity and unknown ones */
52  
53   #ifdef NOPROTO
54   extern int      (*mg_ehand[MG_NENTITIES])();
55 + extern int      (*mg_uhand)();
56 + extern int      mg_defuhand();
57   #else
58   extern int      (*mg_ehand[MG_NENTITIES])(int argc, char **argv);
59 + extern int      (*mg_uhand)(int argc, char **argv);
60 + extern int      mg_defuhand(int, char **);
61   #endif
62  
63 + extern unsigned mg_nunknown;            /* count of unknown entities */
64 +
65                          /* Error codes */
66   #define MG_OK           0               /* normal return value */
67   #define MG_EUNK         1               /* unknown entity */
# Line 64 | Line 77 | extern int     (*mg_ehand[MG_NENTITIES])(int argc, char **
77  
78   #define MG_NERRS        11
79  
80 < extern char     *mg_err[MG_NERRS];
80 > extern char     *mg_err[MG_NERRS];      /* list of error messages */
81  
82   /*
83   * The general process for running the parser is to fill in the mg_ehand
# Line 75 | Line 88 | extern char    *mg_err[MG_NERRS];
88   * To read from standard input, use NULL as the file name.
89   * For additional control over error reporting and file management,
90   * use mg_open, mg_read, mg_parse and mg_close instead of mg_load.
91 + * To pass an entity of your own construction to the parser, use
92 + * the mg_handle function rather than the mg_ehand routines directly.
93 + * (The first argument to mg_handle is the entity #, or -1.)
94   * To free any data structures and clear the parser, use mg_clear.
95 < * If there is an error, mg_load, mg_open, mg_parse, and mg_rewind
96 < * will return an error from the list above.  In addition, mg_load
97 < * will report the error to stderr.  The mg_read routine returns 0
98 < * when the end of file has been reached.
95 > * If there is an error, mg_load, mg_open, mg_parse, mg_handle and
96 > * mg_fgoto will return an error from the list above.  In addition,
97 > * mg_load will report the error to stderr.  The mg_read routine
98 > * returns 0 when the end of file has been reached.
99   */
100  
101 < #define MG_MAXLINE      512             /* maximum input line length */
101 > #define MG_MAXLINE      4096            /* maximum input line length */
102   #define MG_MAXARGC      (MG_MAXLINE/4)  /* maximum argument count */
103  
104   typedef struct mg_fctxt {
105 <        char    *fname;                         /* file name */
105 >        char    fname[96];                      /* file name */
106          FILE    *fp;                            /* stream pointer */
107 +        int     fid;                            /* unique file context id */
108          char    inpline[MG_MAXLINE];            /* input line */
109          int     lineno;                         /* line number */
110          struct mg_fctxt *prev;                  /* previous context */
111   } MG_FCTXT;
112  
113 + typedef struct {
114 +        int     fid;                            /* file this position is for */
115 +        int     lineno;                         /* line number in file */
116 +        long    offset;                         /* offset from beginning */
117 + } MG_FPOS;
118 +
119   extern MG_FCTXT *mg_file;               /* current file context */
120  
121   #ifdef NOPROTO
# Line 101 | Line 124 | extern int     mg_load();              /* parse a file */
124   extern int      mg_open();              /* open new input file */
125   extern int      mg_read();              /* read next line */
126   extern int      mg_parse();             /* parse current line */
127 < extern int      mg_rewind();            /* rewind input file */
127 > extern void     mg_fgetpos();           /* get position on input file */
128 > extern int      mg_fgoto();             /* go to position on input file */
129   extern void     mg_close();             /* close input file */
130   extern void     mg_clear();             /* clear parser */
131 < extern int      mg_iterate();
131 > extern int      mg_handle();            /* handle an entity */
132   #else
133   extern void     mg_init(void);          /* fill in mg_ehand array */
134   extern int      mg_load(char *);        /* parse a file */
135   extern int      mg_open(MG_FCTXT *, char *);    /* open new input file */
136   extern int      mg_read(void);          /* read next line */
137   extern int      mg_parse(void);         /* parse current line */
138 < extern int      mg_rewind(void);        /* rewind input file */
138 > extern void     mg_fgetpos(MG_FPOS *);  /* get position on input file */
139 > extern int      mg_fgoto(MG_FPOS *);    /* go to position on input file */
140   extern void     mg_close(void);         /* close input file */
141   extern void     mg_clear(void);         /* clear parser */
142 < extern int      mg_iterate(int, char **, int (*)(void));
142 > extern int      mg_handle(int, int, char **);   /* handle an entity */
143   #endif
144  
145   #ifndef MG_NQCD
# Line 131 | Line 156 | extern int     mg_nqcdivs;             /* divisions per quarter circl
156   extern int mg_entity();                 /* get entity number from its name */
157   extern int isint();                     /* non-zero if integer format */
158   extern int isflt();                     /* non-zero if floating point format */
159 + extern int isname();                    /* non-zero if legal identifier name */
160   #else
161   extern int mg_entity(char *);           /* get entity number from its name */
162   extern int isint(char *);               /* non-zero if integer format */
163   extern int isflt(char *);               /* non-zero if floating point format */
164 + extern int isname(char *);              /* non-zero if legal identifier name */
165   #endif
166  
167   /************************************************************************
# Line 158 | Line 185 | typedef FLOAT  FVECT[3];
185                                  (vr)[1]=(v1)[1]+(f)*(v2)[1], \
186                                  (vr)[2]=(v1)[2]+(f)*(v2)[2])
187  
188 < #define is0vect(v)      (DOT(v,v) < FTINY*FTINY)
188 > #define is0vect(v)      (DOT(v,v) <= FTINY*FTINY)
189  
190   #define round0(x)       if (x <= FTINY && x >= -FTINY) x = 0
191  
# Line 173 | Line 200 | extern double  normalize(FVECT);       /* normalize a vector
200   *      (materials, colors, vectors)
201   */
202  
203 + #define C_CMINWL        380             /* minimum wavelength */
204 + #define C_CMAXWL        780             /* maximum wavelength */
205 + #define C_CNSS          41              /* number of spectral samples */
206 + #define C_CWLI          ((C_CMAXWL-C_CMINWL)/(C_CNSS-1))
207 + #define C_CMAXV         10000           /* nominal maximum sample value */
208 + #define C_CLPWM         (683./C_CMAXV)  /* peak lumens/watt multiplier */
209 +
210 + #define C_CSSPEC        01              /* flag if spectrum is set */
211 + #define C_CDSPEC        02              /* flag if defined w/ spectrum */
212 + #define C_CSXY          04              /* flag if xy is set */
213 + #define C_CDXY          010             /* flag if defined w/ xy */
214 + #define C_CSEFF         020             /* flag if efficacy set */
215 +
216   typedef struct {
217 <        float   cx, cy;         /* XY chromaticity coordinates */
218 < } C_COLOR;              /* color context */
217 >        int     clock;                  /* incremented each change */
218 >        short   flags;                  /* what's been set */
219 >        short   ssamp[C_CNSS];          /* spectral samples, min wl to max */
220 >        long    ssum;                   /* straight sum of spectral values */
221 >        float   cx, cy;                 /* xy chromaticity value */
222 >        float   eff;                    /* efficacy (lumens/watt) */
223 > } C_COLOR;
224  
225 + #define C_DEFCOLOR      { 1, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\
226 +                        {C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
227 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
228 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
229 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
230 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
231 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
232 +                        C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV},\
233 +                        (long)C_CNSS*C_CMAXV, 1./3., 1./3., 178.006 }
234 +
235 + #define c_cval(c,l)     ((double)(c)->ssamp[((l)-C_MINWL)/C_CWLI] / (c)->ssum)
236 +
237 + #define C_1SIDEDTHICK   0.005           /* assumed thickness of 1-sided mat. */
238 +
239   typedef struct {
181 –        char    *name;          /* material name */
240          int     clock;          /* incremented each change -- resettable */
241 +        int     sided;          /* 1 if surface is 1-sided, 0 for 2-sided */
242 +        float   nr, ni;         /* index of refraction, real and imaginary */
243          float   rd;             /* diffuse reflectance */
244          C_COLOR rd_c;           /* diffuse reflectance color */
245          float   td;             /* diffuse transmittance */
# Line 195 | Line 255 | typedef struct {
255   } C_MATERIAL;           /* material context */
256  
257   typedef struct {
258 +        int     clock;          /* incremented each change -- resettable */
259          FVECT   p, n;           /* point and normal */
260   } C_VERTEX;             /* vertex context */
261  
262 < #define isgrey(cxy)     ((cxy)->cx > .31 && (cxy)->cx < .35 && \
202 <                        (cxy)->cy > .31 && (cxy)->cy < .35)
203 <
204 < #define C_DEFCOLOR      {.333,.333}
205 < #define C_DEFMATERIAL   {NULL,1,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\
262 > #define C_DEFMATERIAL   {1,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\
263                                          0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.}
264 < #define C_DEFVERTEX     {{0.,0.,0.},{0.,0.,0.}}
264 > #define C_DEFVERTEX     {1,{0.,0.,0.},{0.,0.,0.}}
265  
266   extern C_COLOR          *c_ccolor;      /* the current color */
267 + extern char             *c_ccname;      /* current color name */
268   extern C_MATERIAL       *c_cmaterial;   /* the current material */
269 + extern char             *c_cmname;      /* current material name */
270   extern C_VERTEX         *c_cvertex;     /* the current vertex */
271 + extern char             *c_cvname;      /* current vertex name */
272  
273   #ifdef NOPROTO
274   extern int      c_hcolor();                     /* handle color entity */
275   extern int      c_hmaterial();                  /* handle material entity */
276   extern int      c_hvertex();                    /* handle vertex entity */
277   extern void     c_clearall();                   /* clear context tables */
278 + extern C_MATERIAL       *c_getmaterial();       /* get a named material */
279   extern C_VERTEX *c_getvert();                   /* get a named vertex */
280 + extern C_COLOR  *c_getcolor();                  /* get a named color */
281 + extern void     c_ccvt();                       /* fix color representation */
282 + extern int      c_isgrey();                     /* check if color is grey */
283   #else
284   extern int      c_hcolor(int, char **);         /* handle color entity */
285   extern int      c_hmaterial(int, char **);      /* handle material entity */
286   extern int      c_hvertex(int, char **);        /* handle vertex entity */
287   extern void     c_clearall(void);               /* clear context tables */
288 + extern C_MATERIAL       *c_getmaterial(char *); /* get a named material */
289   extern C_VERTEX *c_getvert(char *);             /* get a named vertex */
290 + extern C_COLOR  *c_getcolor(char *);            /* get a named color */
291 + extern void     c_ccvt(C_COLOR *, int);         /* fix color representation */
292 + extern int      c_isgrey(C_COLOR *);            /* check if color is grey */
293   #endif
294  
295   /*************************************************************************
# Line 249 | Line 317 | typedef FLOAT  MAT4[4][4];
317   #define  copymat4(m4a,m4b)      bcopy((char *)m4b,(char *)m4a,sizeof(MAT4))
318   #else
319   #define  copymat4(m4a,m4b)      (void)memcpy((char *)m4a,(char *)m4b,sizeof(MAT4))
252 – extern char  *memcpy();
320   #endif
321  
322   #define  MAT4IDENT              { {1.,0.,0.,0.}, {0.,1.,0.,0.}, \
# Line 261 | Line 328 | extern MAT4  m4ident;
328  
329                                  /* regular transformation */
330   typedef struct {
331 <        MAT4  xfm;                              /* transform matrix */
332 <        FLOAT  sca;                             /* scalefactor */
331 >        MAT4    xfm;                            /* transform matrix */
332 >        FLOAT   sca;                            /* scalefactor */
333   }  XF;
334  
335   #define identxf(xp)             (void)(setident4((xp)->xfm),(xp)->sca=1.0)
336  
337 + #define XF_MAXDIM       8               /* maximum array dimensions */
338 +
339 + struct xf_array {
340 +        MG_FPOS spos;                   /* starting position on input */
341 +        int     ndim;                   /* number of array dimensions */
342 +        struct {
343 +                short   i, n;           /* current count and maximum */
344 +                char    arg[8];         /* string argument value */
345 +        } aarg[XF_MAXDIM];
346 + };
347 +
348   typedef struct xf_spec {
349 <        short   xac;            /* transform argument count */
350 <        short   xav0;           /* zeroeth argument in xf_argv array */
351 <        XF      xf;             /* cumulative transformation */
352 <        struct xf_spec  *prev;  /* previous transformation context */
353 < } XF_SPEC;
349 >        long    xid;                    /* unique transform id */
350 >        short   xac;                    /* context argument count */
351 >        short   rev;                    /* boolean true if vertices reversed */
352 >        XF      xf;                     /* cumulative transformation */
353 >        struct xf_array *xarr;          /* transformation array pointer */
354 >        struct xf_spec  *prev;          /* previous transformation context */
355 > } XF_SPEC;                      /* followed by argument buffer */
356  
357 < extern int      xf_argc;                        /* total # transform args. */
358 < extern char     **xf_argv;                      /* transform arguments */
279 < extern XF_SPEC  *xf_context;                    /* current context */
357 > extern XF_SPEC  *xf_context;                    /* current transform context */
358 > extern char     **xf_argend;                    /* last transform argument */
359  
360 + #define xf_ac(xf)       ((xf)->xac)
361 + #define xf_av(xf)       (xf_argend - (xf)->xac)
362 +
363 + #define xf_argc         (xf_context==NULL ? 0 : xf_ac(xf_context))
364 + #define xf_argv         xf_av(xf_context)
365 +
366   /*
367   * The transformation handler should do most of the work that needs
368   * doing.  Just pass it any xf entities, then use the associated
# Line 320 | Line 405 | extern void    xf_clear(void);                 /* clear xf stack */
405   extern void     multmat4(MAT4, MAT4, MAT4);     /* m4a = m4b X m4c */
406   extern void     multv3(FVECT, FVECT, MAT4);     /* v3a = v3b X m4 (vectors) */
407   extern void     multp3(FVECT, FVECT, MAT4);     /* p3a = p3b X m4 (points) */
408 < extern int      xf(XF, int, char **);           /* interpret transform spec. */
408 > extern int      xf(XF *, int, char **);         /* interpret transform spec. */
409  
410   #endif
411  

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