| 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_CCT 2 |
| 15 |
#define MG_E_CONE 3 |
| 16 |
#define MG_E_CMIX 4 |
| 17 |
#define MG_E_CSPEC 5 |
| 18 |
#define MG_E_CXY 6 |
| 19 |
#define MG_E_CYL 7 |
| 20 |
#define MG_E_ED 8 |
| 21 |
#define MG_E_FACE 9 |
| 22 |
#define MG_E_INCLUDE 10 |
| 23 |
#define MG_E_IES 11 |
| 24 |
#define MG_E_IR 12 |
| 25 |
#define MG_E_MATERIAL 13 |
| 26 |
#define MG_E_NORMAL 14 |
| 27 |
#define MG_E_OBJECT 15 |
| 28 |
#define MG_E_POINT 16 |
| 29 |
#define MG_E_PRISM 17 |
| 30 |
#define MG_E_RD 18 |
| 31 |
#define MG_E_RING 19 |
| 32 |
#define MG_E_RS 20 |
| 33 |
#define MG_E_SIDES 21 |
| 34 |
#define MG_E_SPH 22 |
| 35 |
#define MG_E_TD 23 |
| 36 |
#define MG_E_TORUS 24 |
| 37 |
#define MG_E_TS 25 |
| 38 |
#define MG_E_VERTEX 26 |
| 39 |
#define MG_E_XF 27 |
| 40 |
|
| 41 |
#define MG_NENTITIES 28 |
| 42 |
|
| 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 */ |
| 52 |
|
| 53 |
#ifdef NOPROTO |
| 54 |
extern int (*mg_ehand[MG_NENTITIES])(); |
| 55 |
#else |
| 56 |
extern int (*mg_ehand[MG_NENTITIES])(int argc, char **argv); |
| 57 |
#endif |
| 58 |
|
| 59 |
/* Error codes */ |
| 60 |
#define MG_OK 0 /* normal return value */ |
| 61 |
#define MG_EUNK 1 /* unknown entity */ |
| 62 |
#define MG_EARGC 2 /* wrong number of arguments */ |
| 63 |
#define MG_ETYPE 3 /* argument type error */ |
| 64 |
#define MG_EILL 4 /* illegal argument value */ |
| 65 |
#define MG_EUNDEF 5 /* undefined reference */ |
| 66 |
#define MG_ENOFILE 6 /* cannot open input file */ |
| 67 |
#define MG_EINCL 7 /* error in included file */ |
| 68 |
#define MG_EMEM 8 /* out of memory */ |
| 69 |
#define MG_ESEEK 9 /* file seek error */ |
| 70 |
#define MG_EBADMAT 10 /* bad material specification */ |
| 71 |
|
| 72 |
#define MG_NERRS 11 |
| 73 |
|
| 74 |
extern char *mg_err[MG_NERRS]; |
| 75 |
|
| 76 |
/* |
| 77 |
* The general process for running the parser is to fill in the mg_ehand |
| 78 |
* array with handlers for each entity you know how to handle. |
| 79 |
* Then, call mg_init to fill in the rest. This function will report |
| 80 |
* an error and quit if you try to support an inconsistent set of entities. |
| 81 |
* For each file you want to parse, call mg_load with the file name. |
| 82 |
* To read from standard input, use NULL as the file name. |
| 83 |
* For additional control over error reporting and file management, |
| 84 |
* use mg_open, mg_read, mg_parse and mg_close instead of mg_load. |
| 85 |
* To pass an entity of your own construction to the parser, use |
| 86 |
* the mg_handle function rather than the mg_ehand routines directly. |
| 87 |
* (The first argument to mg_handle is the entity #, or -1.) |
| 88 |
* To free any data structures and clear the parser, use mg_clear. |
| 89 |
* If there is an error, mg_load, mg_open, mg_parse, mg_handle and |
| 90 |
* mg_rewind will return an error from the list above. In addition, |
| 91 |
* mg_load will report the error to stderr. The mg_read routine |
| 92 |
* returns 0 when the end of file has been reached. |
| 93 |
*/ |
| 94 |
|
| 95 |
#define MG_MAXLINE 4096 /* maximum input line length */ |
| 96 |
#define MG_MAXARGC (MG_MAXLINE/4) /* maximum argument count */ |
| 97 |
|
| 98 |
typedef struct mg_fctxt { |
| 99 |
char fname[96]; /* file name */ |
| 100 |
FILE *fp; /* stream pointer */ |
| 101 |
int fid; /* unique file context id */ |
| 102 |
char inpline[MG_MAXLINE]; /* input line */ |
| 103 |
int lineno; /* line number */ |
| 104 |
struct mg_fctxt *prev; /* previous context */ |
| 105 |
} MG_FCTXT; |
| 106 |
|
| 107 |
typedef struct { |
| 108 |
int fid; /* file this position is for */ |
| 109 |
int lineno; /* line number in file */ |
| 110 |
long offset; /* offset from beginning */ |
| 111 |
} MG_FPOS; |
| 112 |
|
| 113 |
extern MG_FCTXT *mg_file; /* current file context */ |
| 114 |
|
| 115 |
#ifdef NOPROTO |
| 116 |
extern void mg_init(); /* fill in mg_ehand array */ |
| 117 |
extern int mg_load(); /* parse a file */ |
| 118 |
extern int mg_open(); /* open new input file */ |
| 119 |
extern int mg_read(); /* read next line */ |
| 120 |
extern int mg_parse(); /* parse current line */ |
| 121 |
extern void mg_fgetpos(); /* get position on input file */ |
| 122 |
extern int mg_fgoto(); /* go to position on input file */ |
| 123 |
extern void mg_close(); /* close input file */ |
| 124 |
extern void mg_clear(); /* clear parser */ |
| 125 |
extern int mg_handle(); /* handle an entity */ |
| 126 |
#else |
| 127 |
extern void mg_init(void); /* fill in mg_ehand array */ |
| 128 |
extern int mg_load(char *); /* parse a file */ |
| 129 |
extern int mg_open(MG_FCTXT *, char *); /* open new input file */ |
| 130 |
extern int mg_read(void); /* read next line */ |
| 131 |
extern int mg_parse(void); /* parse current line */ |
| 132 |
extern void mg_fgetpos(MG_FPOS *); /* get position on input file */ |
| 133 |
extern int mg_fgoto(MG_FPOS *); /* go to position on input file */ |
| 134 |
extern void mg_close(void); /* close input file */ |
| 135 |
extern void mg_clear(void); /* clear parser */ |
| 136 |
extern int mg_handle(int, int, char **); /* handle an entity */ |
| 137 |
#endif |
| 138 |
|
| 139 |
#ifndef MG_NQCD |
| 140 |
#define MG_NQCD 5 /* default number of divisions */ |
| 141 |
#endif |
| 142 |
|
| 143 |
extern int mg_nqcdivs; /* divisions per quarter circle */ |
| 144 |
|
| 145 |
/* |
| 146 |
* The following library routines are included for your convenience: |
| 147 |
*/ |
| 148 |
|
| 149 |
#ifdef NOPROTO |
| 150 |
extern int mg_entity(); /* get entity number from its name */ |
| 151 |
extern int isint(); /* non-zero if integer format */ |
| 152 |
extern int isflt(); /* non-zero if floating point format */ |
| 153 |
#else |
| 154 |
extern int mg_entity(char *); /* get entity number from its name */ |
| 155 |
extern int isint(char *); /* non-zero if integer format */ |
| 156 |
extern int isflt(char *); /* non-zero if floating point format */ |
| 157 |
#endif |
| 158 |
|
| 159 |
/************************************************************************ |
| 160 |
* Definitions for 3-d vector manipulation functions |
| 161 |
*/ |
| 162 |
|
| 163 |
#ifdef SMLFLT |
| 164 |
#define FLOAT float |
| 165 |
#define FTINY (1e-3) |
| 166 |
#else |
| 167 |
#define FLOAT double |
| 168 |
#define FTINY (1e-6) |
| 169 |
#endif |
| 170 |
#define FHUGE (1e10) |
| 171 |
|
| 172 |
typedef FLOAT FVECT[3]; |
| 173 |
|
| 174 |
#define VCOPY(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2]) |
| 175 |
#define DOT(v1,v2) ((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2]) |
| 176 |
#define VSUM(vr,v1,v2,f) ((vr)[0]=(v1)[0]+(f)*(v2)[0], \ |
| 177 |
(vr)[1]=(v1)[1]+(f)*(v2)[1], \ |
| 178 |
(vr)[2]=(v1)[2]+(f)*(v2)[2]) |
| 179 |
|
| 180 |
#define is0vect(v) (DOT(v,v) <= FTINY*FTINY) |
| 181 |
|
| 182 |
#define round0(x) if (x <= FTINY && x >= -FTINY) x = 0 |
| 183 |
|
| 184 |
#ifdef NOPROTO |
| 185 |
extern double normalize(); /* normalize a vector */ |
| 186 |
#else |
| 187 |
extern double normalize(FVECT); /* normalize a vector */ |
| 188 |
#endif |
| 189 |
|
| 190 |
/************************************************************************ |
| 191 |
* Definitions for context handling routines |
| 192 |
* (materials, colors, vectors) |
| 193 |
*/ |
| 194 |
|
| 195 |
#define C_CMINWL 380 /* minimum wavelength */ |
| 196 |
#define C_CMAXWL 780 /* maximum wavelength */ |
| 197 |
#define C_CNSS 41 /* number of spectral samples */ |
| 198 |
#define C_CWLI ((C_CMAXWL-C_CMINWL)/(C_CNSS-1)) |
| 199 |
#define C_CMAXV 10000 /* nominal maximum sample value */ |
| 200 |
#define C_CLPWM (683./C_CMAXV) /* peak lumens/watt multiplier */ |
| 201 |
|
| 202 |
#define C_CSSPEC 01 /* flag if spectrum is set */ |
| 203 |
#define C_CDSPEC 02 /* flag if defined w/ spectrum */ |
| 204 |
#define C_CSXY 04 /* flag if xy is set */ |
| 205 |
#define C_CDXY 010 /* flag if defined w/ xy */ |
| 206 |
#define C_CSEFF 020 /* flag if efficacy set */ |
| 207 |
|
| 208 |
typedef struct { |
| 209 |
int clock; /* incremented each change */ |
| 210 |
short flags; /* what's been set */ |
| 211 |
short ssamp[C_CNSS]; /* spectral samples, min wl to max */ |
| 212 |
long ssum; /* straight sum of spectral values */ |
| 213 |
float cx, cy; /* xy chromaticity value */ |
| 214 |
float eff; /* efficacy (lumens/watt) */ |
| 215 |
} C_COLOR; |
| 216 |
|
| 217 |
#define C_DEFCOLOR { 1, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\ |
| 218 |
{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 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 224 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV},\ |
| 225 |
(long)C_CNSS*C_CMAXV, 1./3., 1./3., 178.006 } |
| 226 |
|
| 227 |
#define c_cval(c,l) ((double)(c)->ssamp[((l)-C_MINWL)/C_CWLI] / (c)->ssum) |
| 228 |
|
| 229 |
#define C_1SIDEDTHICK 0.005 /* assumed thickness of 1-sided mat. */ |
| 230 |
|
| 231 |
typedef struct { |
| 232 |
int clock; /* incremented each change -- resettable */ |
| 233 |
int sided; /* 1 if surface is 1-sided, 0 for 2-sided */ |
| 234 |
float nr, ni; /* index of refraction, real and imaginary */ |
| 235 |
float rd; /* diffuse reflectance */ |
| 236 |
C_COLOR rd_c; /* diffuse reflectance color */ |
| 237 |
float td; /* diffuse transmittance */ |
| 238 |
C_COLOR td_c; /* diffuse transmittance color */ |
| 239 |
float ed; /* diffuse emittance */ |
| 240 |
C_COLOR ed_c; /* diffuse emittance color */ |
| 241 |
float rs; /* specular reflectance */ |
| 242 |
C_COLOR rs_c; /* specular reflectance color */ |
| 243 |
float rs_a; /* specular reflectance roughness */ |
| 244 |
float ts; /* specular transmittance */ |
| 245 |
C_COLOR ts_c; /* specular transmittance color */ |
| 246 |
float ts_a; /* specular transmittance roughness */ |
| 247 |
} C_MATERIAL; /* material context */ |
| 248 |
|
| 249 |
typedef struct { |
| 250 |
int clock; /* incremented each change -- resettable */ |
| 251 |
FVECT p, n; /* point and normal */ |
| 252 |
} C_VERTEX; /* vertex context */ |
| 253 |
|
| 254 |
#define C_DEFMATERIAL {1,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\ |
| 255 |
0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.} |
| 256 |
#define C_DEFVERTEX {1,{0.,0.,0.},{0.,0.,0.}} |
| 257 |
|
| 258 |
extern C_COLOR *c_ccolor; /* the current color */ |
| 259 |
extern char *c_ccname; /* current color name */ |
| 260 |
extern C_MATERIAL *c_cmaterial; /* the current material */ |
| 261 |
extern char *c_cmname; /* current material name */ |
| 262 |
extern C_VERTEX *c_cvertex; /* the current vertex */ |
| 263 |
extern char *c_cvname; /* current vertex name */ |
| 264 |
|
| 265 |
#ifdef NOPROTO |
| 266 |
extern int c_hcolor(); /* handle color entity */ |
| 267 |
extern int c_hmaterial(); /* handle material entity */ |
| 268 |
extern int c_hvertex(); /* handle vertex entity */ |
| 269 |
extern void c_clearall(); /* clear context tables */ |
| 270 |
extern C_MATERIAL *c_getmaterial(); /* get a named material */ |
| 271 |
extern C_VERTEX *c_getvert(); /* get a named vertex */ |
| 272 |
extern C_COLOR *c_getcolor(); /* get a named color */ |
| 273 |
extern void c_ccvt(); /* fix color representation */ |
| 274 |
extern int c_isgrey(); /* check if color is grey */ |
| 275 |
#else |
| 276 |
extern int c_hcolor(int, char **); /* handle color entity */ |
| 277 |
extern int c_hmaterial(int, char **); /* handle material entity */ |
| 278 |
extern int c_hvertex(int, char **); /* handle vertex entity */ |
| 279 |
extern void c_clearall(void); /* clear context tables */ |
| 280 |
extern C_MATERIAL *c_getmaterial(char *); /* get a named material */ |
| 281 |
extern C_VERTEX *c_getvert(char *); /* get a named vertex */ |
| 282 |
extern C_COLOR *c_getcolor(char *); /* get a named color */ |
| 283 |
extern void c_ccvt(C_COLOR *, int); /* fix color representation */ |
| 284 |
extern int c_isgrey(C_COLOR *); /* check if color is grey */ |
| 285 |
#endif |
| 286 |
|
| 287 |
/************************************************************************* |
| 288 |
* Definitions for hierarchical object name handler |
| 289 |
*/ |
| 290 |
|
| 291 |
extern int obj_nnames; /* depth of name hierarchy */ |
| 292 |
extern char **obj_name; /* names in hierarchy */ |
| 293 |
|
| 294 |
#ifdef NOPROTO |
| 295 |
extern int obj_handler(); /* handle an object entity */ |
| 296 |
extern void obj_clear(); /* clear object stack */ |
| 297 |
#else |
| 298 |
extern int obj_handler(int, char **); /* handle an object entity */ |
| 299 |
extern void obj_clear(void); /* clear object stack */ |
| 300 |
#endif |
| 301 |
|
| 302 |
/************************************************************************** |
| 303 |
* Definitions for hierarchical transformation handler |
| 304 |
*/ |
| 305 |
|
| 306 |
typedef FLOAT MAT4[4][4]; |
| 307 |
|
| 308 |
#ifdef BSD |
| 309 |
#define copymat4(m4a,m4b) bcopy((char *)m4b,(char *)m4a,sizeof(MAT4)) |
| 310 |
#else |
| 311 |
#define copymat4(m4a,m4b) (void)memcpy((char *)m4a,(char *)m4b,sizeof(MAT4)) |
| 312 |
#endif |
| 313 |
|
| 314 |
#define MAT4IDENT { {1.,0.,0.,0.}, {0.,1.,0.,0.}, \ |
| 315 |
{0.,0.,1.,0.}, {0.,0.,0.,1.} } |
| 316 |
|
| 317 |
extern MAT4 m4ident; |
| 318 |
|
| 319 |
#define setident4(m4) copymat4(m4, m4ident) |
| 320 |
|
| 321 |
/* regular transformation */ |
| 322 |
typedef struct { |
| 323 |
MAT4 xfm; /* transform matrix */ |
| 324 |
FLOAT sca; /* scalefactor */ |
| 325 |
} XF; |
| 326 |
|
| 327 |
#define identxf(xp) (void)(setident4((xp)->xfm),(xp)->sca=1.0) |
| 328 |
|
| 329 |
#define XF_MAXDIM 8 /* maximum array dimensions */ |
| 330 |
|
| 331 |
struct xf_array { |
| 332 |
MG_FPOS spos; /* starting position on input */ |
| 333 |
int ndim; /* number of array dimensions */ |
| 334 |
struct { |
| 335 |
short i, n; /* current count and maximum */ |
| 336 |
char arg[8]; /* string argument value */ |
| 337 |
} aarg[XF_MAXDIM]; |
| 338 |
}; |
| 339 |
|
| 340 |
typedef struct xf_spec { |
| 341 |
long xid; /* unique transform id */ |
| 342 |
short xav0; /* zeroeth argument in xf_argv array */ |
| 343 |
short xac; /* transform argument count */ |
| 344 |
short rev; /* boolean true if vertices reversed */ |
| 345 |
XF xf; /* cumulative transformation */ |
| 346 |
struct xf_array *xarr; /* transformation array pointer */ |
| 347 |
struct xf_spec *prev; /* previous transformation context */ |
| 348 |
} XF_SPEC; /* followed by argument buffer */ |
| 349 |
|
| 350 |
extern int xf_argc; /* total # transform args. */ |
| 351 |
extern char **xf_argv; /* transform arguments */ |
| 352 |
extern XF_SPEC *xf_context; /* current context */ |
| 353 |
|
| 354 |
/* |
| 355 |
* The transformation handler should do most of the work that needs |
| 356 |
* doing. Just pass it any xf entities, then use the associated |
| 357 |
* functions to transform and translate points, transform vectors |
| 358 |
* (without translation), rotate vectors (without scaling) and scale |
| 359 |
* values appropriately. |
| 360 |
* |
| 361 |
* The routines xf_xfmpoint, xf_xfmvect and xf_rotvect take two |
| 362 |
* 3-D vectors (which may be identical), transforms the second and |
| 363 |
* puts the result into the first. |
| 364 |
*/ |
| 365 |
|
| 366 |
#ifdef NOPROTO |
| 367 |
|
| 368 |
extern int xf_handler(); /* handle xf entity */ |
| 369 |
extern void xf_xfmpoint(); /* transform point */ |
| 370 |
extern void xf_xfmvect(); /* transform vector */ |
| 371 |
extern void xf_rotvect(); /* rotate vector */ |
| 372 |
extern double xf_scale(); /* scale a value */ |
| 373 |
extern void xf_clear(); /* clear xf stack */ |
| 374 |
|
| 375 |
/* The following are support routines you probably won't call directly */ |
| 376 |
|
| 377 |
extern void multmat4(); /* m4a = m4b X m4c */ |
| 378 |
extern void multv3(); /* v3a = v3b X m4 (vectors) */ |
| 379 |
extern void multp3(); /* p3a = p3b X m4 (points) */ |
| 380 |
extern int xf(); /* interpret transform spec. */ |
| 381 |
|
| 382 |
#else |
| 383 |
|
| 384 |
extern int xf_handler(int, char **); /* handle xf entity */ |
| 385 |
extern void xf_xfmpoint(FVECT, FVECT); /* transform point */ |
| 386 |
extern void xf_xfmvect(FVECT, FVECT); /* transform vector */ |
| 387 |
extern void xf_rotvect(FVECT, FVECT); /* rotate vector */ |
| 388 |
extern double xf_scale(double); /* scale a value */ |
| 389 |
extern void xf_clear(void); /* clear xf stack */ |
| 390 |
|
| 391 |
/* The following are support routines you probably won't call directly */ |
| 392 |
|
| 393 |
extern void multmat4(MAT4, MAT4, MAT4); /* m4a = m4b X m4c */ |
| 394 |
extern void multv3(FVECT, FVECT, MAT4); /* v3a = v3b X m4 (vectors) */ |
| 395 |
extern void multp3(FVECT, FVECT, MAT4); /* p3a = p3b X m4 (points) */ |
| 396 |
extern int xf(XF *, int, char **); /* interpret transform spec. */ |
| 397 |
|
| 398 |
#endif |
| 399 |
|
| 400 |
/************************************************************************ |
| 401 |
* Miscellaneous definitions |
| 402 |
*/ |
| 403 |
|
| 404 |
#ifdef M_PI |
| 405 |
#define PI M_PI |
| 406 |
#else |
| 407 |
#define PI 3.14159265358979323846 |
| 408 |
#endif |
| 409 |
|
| 410 |
#ifdef DCL_ATOF |
| 411 |
extern double atof(); |
| 412 |
#endif |
| 413 |
|
| 414 |
#ifndef MEM_PTR |
| 415 |
#define MEM_PTR void * |
| 416 |
#endif |
| 417 |
|
| 418 |
extern MEM_PTR malloc(); |
| 419 |
extern MEM_PTR calloc(); |
| 420 |
extern MEM_PTR realloc(); |
| 421 |
extern void free(); |
