| 1 |
/* RCSid: $Id: parser.h,v 1.39 2011/01/14 05:46:12 greg Exp $ */ |
| 2 |
/* |
| 3 |
* Header file for MGF interpreter |
| 4 |
*/ |
| 5 |
#ifndef _MGF_PARSER_H_ |
| 6 |
#define _MGF_PARSER_H_ |
| 7 |
|
| 8 |
/* must include stdio.h and stdlib.h before us */ |
| 9 |
|
| 10 |
#include "rtmath.h" |
| 11 |
#include "ccolor.h" |
| 12 |
|
| 13 |
#ifdef __cplusplus |
| 14 |
extern "C" { |
| 15 |
#endif |
| 16 |
|
| 17 |
#define MG_VMAJOR 2 /* major version number */ |
| 18 |
#define MG_VMINOR 0 /* minor version number */ |
| 19 |
|
| 20 |
/* Entities (list is only appended, never modified) */ |
| 21 |
#define MG_E_COMMENT 0 /* # */ |
| 22 |
#define MG_E_COLOR 1 /* c */ |
| 23 |
#define MG_E_CCT 2 /* cct */ |
| 24 |
#define MG_E_CONE 3 /* cone */ |
| 25 |
#define MG_E_CMIX 4 /* cmix */ |
| 26 |
#define MG_E_CSPEC 5 /* cspec */ |
| 27 |
#define MG_E_CXY 6 /* cxy */ |
| 28 |
#define MG_E_CYL 7 /* cyl */ |
| 29 |
#define MG_E_ED 8 /* ed */ |
| 30 |
#define MG_E_FACE 9 /* f */ |
| 31 |
#define MG_E_INCLUDE 10 /* i */ |
| 32 |
#define MG_E_IES 11 /* ies */ |
| 33 |
#define MG_E_IR 12 /* ir */ |
| 34 |
#define MG_E_MATERIAL 13 /* m */ |
| 35 |
#define MG_E_NORMAL 14 /* n */ |
| 36 |
#define MG_E_OBJECT 15 /* o */ |
| 37 |
#define MG_E_POINT 16 /* p */ |
| 38 |
#define MG_E_PRISM 17 /* prism */ |
| 39 |
#define MG_E_RD 18 /* rd */ |
| 40 |
#define MG_E_RING 19 /* ring */ |
| 41 |
#define MG_E_RS 20 /* rs */ |
| 42 |
#define MG_E_SIDES 21 /* sides */ |
| 43 |
#define MG_E_SPH 22 /* sph */ |
| 44 |
#define MG_E_TD 23 /* td */ |
| 45 |
#define MG_E_TORUS 24 /* torus */ |
| 46 |
#define MG_E_TS 25 /* ts */ |
| 47 |
#define MG_E_VERTEX 26 /* v */ |
| 48 |
#define MG_E_XF 27 /* xf */ |
| 49 |
/* end of Version 1 entities */ |
| 50 |
#define MG_E_FACEH 28 /* fh */ |
| 51 |
/* end of Version 2 entities */ |
| 52 |
|
| 53 |
#define MG_NENTITIES 29 /* total # entities */ |
| 54 |
|
| 55 |
#define MG_NELIST {28,29} /* entity count for version 1 and up */ |
| 56 |
|
| 57 |
#define MG_NAMELIST {"#","c","cct","cone","cmix","cspec","cxy","cyl","ed",\ |
| 58 |
"f","i","ies","ir","m","n","o","p","prism","rd",\ |
| 59 |
"ring","rs","sides","sph","td","torus","ts","v","xf",\ |
| 60 |
"fh"} |
| 61 |
|
| 62 |
#define MG_MAXELEN 6 |
| 63 |
|
| 64 |
extern char mg_ename[MG_NENTITIES][MG_MAXELEN]; |
| 65 |
|
| 66 |
/* Handler routines for each entity and unknown ones */ |
| 67 |
extern int (*mg_ehand[MG_NENTITIES])(int argc, char **argv); |
| 68 |
extern int (*mg_uhand)(int argc, char **argv); |
| 69 |
extern int mg_defuhand(int, char **); |
| 70 |
|
| 71 |
extern unsigned mg_nunknown; /* count of unknown entities */ |
| 72 |
|
| 73 |
/* Error codes */ |
| 74 |
#define MG_OK 0 /* normal return value */ |
| 75 |
#define MG_EUNK 1 /* unknown entity */ |
| 76 |
#define MG_EARGC 2 /* wrong number of arguments */ |
| 77 |
#define MG_ETYPE 3 /* argument type error */ |
| 78 |
#define MG_EILL 4 /* illegal argument value */ |
| 79 |
#define MG_EUNDEF 5 /* undefined reference */ |
| 80 |
#define MG_ENOFILE 6 /* cannot open input file */ |
| 81 |
#define MG_EINCL 7 /* error in included file */ |
| 82 |
#define MG_EMEM 8 /* out of memory */ |
| 83 |
#define MG_ESEEK 9 /* file seek error */ |
| 84 |
#define MG_EBADMAT 10 /* bad material specification */ |
| 85 |
#define MG_ELINE 11 /* input line too long */ |
| 86 |
#define MG_ECNTXT 12 /* unmatched context close */ |
| 87 |
|
| 88 |
#define MG_NERRS 13 |
| 89 |
|
| 90 |
extern char *mg_err[MG_NERRS]; /* list of error messages */ |
| 91 |
|
| 92 |
/* |
| 93 |
* The general process for running the parser is to fill in the mg_ehand |
| 94 |
* array with handlers for each entity you know how to handle. |
| 95 |
* Then, call mg_init to fill in the rest. This function will report |
| 96 |
* an error and quit if you try to support an inconsistent set of entities. |
| 97 |
* For each file you want to parse, call mg_load with the file name. |
| 98 |
* To read from standard input, use NULL as the file name. |
| 99 |
* For additional control over error reporting and file management, |
| 100 |
* use mg_open, mg_read, mg_parse and mg_close instead of mg_load. |
| 101 |
* To pass an entity of your own construction to the parser, use |
| 102 |
* the mg_handle function rather than the mg_ehand routines directly. |
| 103 |
* (The first argument to mg_handle is the entity #, or -1.) |
| 104 |
* To free any data structures and clear the parser, use mg_clear. |
| 105 |
* If there is an error, mg_load, mg_open, mg_parse, mg_handle and |
| 106 |
* mg_fgoto will return an error from the list above. In addition, |
| 107 |
* mg_load will report the error to stderr. The mg_read routine |
| 108 |
* returns 0 when the end of file has been reached. |
| 109 |
*/ |
| 110 |
|
| 111 |
#define MG_MAXLINE 4096 /* maximum input line length */ |
| 112 |
#define MG_MAXARGC (MG_MAXLINE/4) /* maximum argument count */ |
| 113 |
|
| 114 |
typedef struct mg_fctxt { |
| 115 |
char fname[96]; /* file name */ |
| 116 |
FILE *fp; /* stream pointer */ |
| 117 |
int fid; /* unique file context id */ |
| 118 |
char inpline[MG_MAXLINE]; /* input line */ |
| 119 |
int lineno; /* line number */ |
| 120 |
struct mg_fctxt *prev; /* previous context */ |
| 121 |
} MG_FCTXT; |
| 122 |
|
| 123 |
typedef struct { |
| 124 |
int fid; /* file this position is for */ |
| 125 |
int lineno; /* line number in file */ |
| 126 |
long offset; /* offset from beginning */ |
| 127 |
} MG_FPOS; |
| 128 |
|
| 129 |
extern MG_FCTXT *mg_file; /* current file context */ |
| 130 |
|
| 131 |
extern void mg_init(void); /* fill in mg_ehand array */ |
| 132 |
extern int mg_load(char *); /* parse a file */ |
| 133 |
extern int mg_open(MG_FCTXT *, char *); /* open new input file */ |
| 134 |
extern int mg_read(void); /* read next line */ |
| 135 |
extern int mg_parse(void); /* parse current line */ |
| 136 |
extern void mg_fgetpos(MG_FPOS *); /* get position on input file */ |
| 137 |
extern int mg_fgoto(MG_FPOS *); /* go to position on input file */ |
| 138 |
extern void mg_close(void); /* close input file */ |
| 139 |
extern void mg_clear(void); /* clear parser */ |
| 140 |
extern int mg_handle(int, int, char **); /* handle an entity */ |
| 141 |
|
| 142 |
#ifndef MG_NQCD |
| 143 |
#define MG_NQCD 5 /* default number of divisions */ |
| 144 |
#endif |
| 145 |
|
| 146 |
extern int mg_nqcdivs; /* divisions per quarter circle */ |
| 147 |
|
| 148 |
/* |
| 149 |
* The following library routines are included for your convenience: |
| 150 |
*/ |
| 151 |
|
| 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 isintd(char *, char *); /* same with delimiter set */ |
| 155 |
extern int isflt(char *); /* non-zero if floating point format */ |
| 156 |
extern int isfltd(char *, char *); /* same with delimiter set */ |
| 157 |
extern int isname(char *); /* non-zero if legal identifier name */ |
| 158 |
extern int badarg(int, char **, char *);/* check argument format */ |
| 159 |
extern int e_include(int, char **); /* expand include entity */ |
| 160 |
extern int e_pipe(int, char **); /* expand piped command */ |
| 161 |
extern int e_sph(int, char **); /* expand sphere as other entities */ |
| 162 |
extern int e_torus(int, char **); /* expand torus as other entities */ |
| 163 |
extern int e_cyl(int, char **); /* expand cylinder as other entities */ |
| 164 |
extern int e_ring(int, char **); /* expand ring as other entities */ |
| 165 |
extern int e_cone(int, char **); /* expand cone as other entities */ |
| 166 |
extern int e_prism(int, char **); /* expand prism as other entities */ |
| 167 |
extern int e_faceh(int, char **); /* expand face w/ holes as face */ |
| 168 |
|
| 169 |
/************************************************************************ |
| 170 |
* Definitions for 3-d vector manipulation functions |
| 171 |
*/ |
| 172 |
|
| 173 |
#define is0vect(v) (DOT(v,v) <= FTINY*FTINY) |
| 174 |
|
| 175 |
#define round0(x) if (x <= FTINY && x >= -FTINY) x = 0 |
| 176 |
|
| 177 |
/************************************************************************ |
| 178 |
* Definitions for context handling routines |
| 179 |
* (materials, colors, vectors) |
| 180 |
*/ |
| 181 |
|
| 182 |
#define C_1SIDEDTHICK 0.005 /* assumed thickness of 1-sided mat. */ |
| 183 |
|
| 184 |
typedef struct { |
| 185 |
int clock; /* incremented each change -- resettable */ |
| 186 |
void *client_data; /* pointer to private client-owned data */ |
| 187 |
int sided; /* 1 if surface is 1-sided, 0 for 2-sided */ |
| 188 |
float nr, ni; /* index of refraction, real and imaginary */ |
| 189 |
float rd; /* diffuse reflectance */ |
| 190 |
C_COLOR rd_c; /* diffuse reflectance color */ |
| 191 |
float td; /* diffuse transmittance */ |
| 192 |
C_COLOR td_c; /* diffuse transmittance color */ |
| 193 |
float ed; /* diffuse emittance */ |
| 194 |
C_COLOR ed_c; /* diffuse emittance color */ |
| 195 |
float rs; /* specular reflectance */ |
| 196 |
C_COLOR rs_c; /* specular reflectance color */ |
| 197 |
float rs_a; /* specular reflectance roughness */ |
| 198 |
float ts; /* specular transmittance */ |
| 199 |
C_COLOR ts_c; /* specular transmittance color */ |
| 200 |
float ts_a; /* specular transmittance roughness */ |
| 201 |
} C_MATERIAL; /* material context */ |
| 202 |
|
| 203 |
typedef struct { |
| 204 |
int clock; /* incremented each change -- resettable */ |
| 205 |
void *client_data; /* pointer to private client-owned data */ |
| 206 |
FVECT p, n; /* point and normal */ |
| 207 |
} C_VERTEX; /* vertex context */ |
| 208 |
|
| 209 |
#define C_DEFMATERIAL {1,NULL,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,\ |
| 210 |
C_DEFCOLOR,0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.} |
| 211 |
#define C_DEFVERTEX {1,NULL,{0.,0.,0.},{0.,0.,0.}} |
| 212 |
|
| 213 |
extern C_COLOR *c_ccolor; /* the current color */ |
| 214 |
extern char *c_ccname; /* current color name */ |
| 215 |
extern C_MATERIAL *c_cmaterial; /* the current material */ |
| 216 |
extern char *c_cmname; /* current material name */ |
| 217 |
extern C_VERTEX *c_cvertex; /* the current vertex */ |
| 218 |
extern char *c_cvname; /* current vertex name */ |
| 219 |
|
| 220 |
extern int c_hcolor(int, char **); /* handle color entity */ |
| 221 |
extern int c_hmaterial(int, char **); /* handle material entity */ |
| 222 |
extern int c_hvertex(int, char **); /* handle vertex entity */ |
| 223 |
extern void c_clearall(void); /* clear context tables */ |
| 224 |
extern C_MATERIAL *c_getmaterial(char *); /* get a named material */ |
| 225 |
extern C_VERTEX *c_getvert(char *); /* get a named vertex */ |
| 226 |
extern C_COLOR *c_getcolor(char *); /* get a named color */ |
| 227 |
|
| 228 |
/************************************************************************* |
| 229 |
* Definitions for hierarchical object name handler |
| 230 |
*/ |
| 231 |
|
| 232 |
extern int obj_nnames; /* depth of name hierarchy */ |
| 233 |
extern char **obj_name; /* names in hierarchy */ |
| 234 |
|
| 235 |
extern int obj_handler(int, char **); /* handle an object entity */ |
| 236 |
extern void obj_clear(void); /* clear object stack */ |
| 237 |
|
| 238 |
/************************************************************************** |
| 239 |
* Definitions for hierarchical transformation handler |
| 240 |
*/ |
| 241 |
|
| 242 |
#define identxf(xp) (void)(setident4((xp)->xfm),(xp)->sca=1.0) |
| 243 |
|
| 244 |
#define XF_MAXDIM 8 /* maximum array dimensions */ |
| 245 |
|
| 246 |
struct xf_array { |
| 247 |
MG_FPOS spos; /* starting position on input */ |
| 248 |
int ndim; /* number of array dimensions */ |
| 249 |
struct { |
| 250 |
short i, n; /* current count and maximum */ |
| 251 |
char arg[8]; /* string argument value */ |
| 252 |
} aarg[XF_MAXDIM]; |
| 253 |
}; |
| 254 |
|
| 255 |
typedef struct xf_spec { |
| 256 |
long xid; /* unique transform id */ |
| 257 |
short xac; /* context argument count */ |
| 258 |
short rev; /* boolean true if vertices reversed */ |
| 259 |
XF xf; /* cumulative transformation */ |
| 260 |
struct xf_array *xarr; /* transformation array pointer */ |
| 261 |
struct xf_spec *prev; /* previous transformation context */ |
| 262 |
} XF_SPEC; /* followed by argument buffer */ |
| 263 |
|
| 264 |
extern XF_SPEC *xf_context; /* current transform context */ |
| 265 |
extern char **xf_argend; /* last transform argument */ |
| 266 |
|
| 267 |
#define xf_ac(xf) ((xf)==NULL ? 0 : (xf)->xac) |
| 268 |
#define xf_av(xf) (xf_argend - (xf)->xac) |
| 269 |
|
| 270 |
#define xf_argc xf_ac(xf_context) |
| 271 |
#define xf_argv xf_av(xf_context) |
| 272 |
|
| 273 |
/* |
| 274 |
* The transformation handler should do most of the work that needs |
| 275 |
* doing. Just pass it any xf entities, then use the associated |
| 276 |
* functions to transform and translate points, transform vectors |
| 277 |
* (without translation), rotate vectors (without scaling) and scale |
| 278 |
* values appropriately. |
| 279 |
* |
| 280 |
* The routines xf_xfmpoint, xf_xfmvect and xf_rotvect take two |
| 281 |
* 3-D vectors (which may be identical), transforms the second and |
| 282 |
* puts the result into the first. |
| 283 |
*/ |
| 284 |
|
| 285 |
|
| 286 |
extern int xf_handler(int, char **); /* handle xf entity */ |
| 287 |
extern void xf_xfmpoint(FVECT, FVECT); /* transform point */ |
| 288 |
extern void xf_xfmvect(FVECT, FVECT); /* transform vector */ |
| 289 |
extern void xf_rotvect(FVECT, FVECT); /* rotate vector */ |
| 290 |
extern double xf_scale(double); /* scale a value */ |
| 291 |
extern void xf_clear(void); /* clear xf stack */ |
| 292 |
|
| 293 |
/* The following are support routines you probably won't call directly */ |
| 294 |
|
| 295 |
XF_SPEC *new_xf(int, char **); /* allocate new transform */ |
| 296 |
void free_xf(XF_SPEC *); /* free a transform */ |
| 297 |
int xf_aname(struct xf_array *); /* name this instance */ |
| 298 |
long comp_xfid(MAT4); /* compute unique ID */ |
| 299 |
extern void multmat4(MAT4, MAT4, MAT4); /* m4a = m4b X m4c */ |
| 300 |
extern void multv3(FVECT, FVECT, MAT4); /* v3a = v3b X m4 (vectors) */ |
| 301 |
extern void multp3(FVECT, FVECT, MAT4); /* p3a = p3b X m4 (points) */ |
| 302 |
extern int xf(XF *, int, char **); /* interpret transform spec. */ |
| 303 |
|
| 304 |
/* cvrgb.c */ |
| 305 |
extern void mgf2rgb(C_COLOR *cin, double intensity, float cout[3]); |
| 306 |
|
| 307 |
/************************************************************************ |
| 308 |
* Miscellaneous definitions |
| 309 |
*/ |
| 310 |
|
| 311 |
#ifdef __cplusplus |
| 312 |
} |
| 313 |
#endif |
| 314 |
#endif /* _MGF_PARSER_H_ */ |
| 315 |
|
