| 1 |
/* RCSid: $Id$ */ |
| 2 |
/* |
| 3 |
* Header file for MGF interpreter |
| 4 |
*/ |
| 5 |
|
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#ifndef MG_VMAJOR |
| 7 |
|
| 8 |
/* must include stdio.h and stdlib.h before us */ |
| 9 |
|
| 10 |
#define MG_VMAJOR 2 /* major version number */ |
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#define MG_VMINOR 0 /* minor version number */ |
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|
| 13 |
/* Entities (list is only appended, never modified) */ |
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#define MG_E_COMMENT 0 /* # */ |
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#define MG_E_COLOR 1 /* c */ |
| 16 |
#define MG_E_CCT 2 /* cct */ |
| 17 |
#define MG_E_CONE 3 /* cone */ |
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#define MG_E_CMIX 4 /* cmix */ |
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#define MG_E_CSPEC 5 /* cspec */ |
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#define MG_E_CXY 6 /* cxy */ |
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#define MG_E_CYL 7 /* cyl */ |
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#define MG_E_ED 8 /* ed */ |
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#define MG_E_FACE 9 /* f */ |
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#define MG_E_INCLUDE 10 /* i */ |
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#define MG_E_IES 11 /* ies */ |
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#define MG_E_IR 12 /* ir */ |
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#define MG_E_MATERIAL 13 /* m */ |
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#define MG_E_NORMAL 14 /* n */ |
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#define MG_E_OBJECT 15 /* o */ |
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#define MG_E_POINT 16 /* p */ |
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#define MG_E_PRISM 17 /* prism */ |
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#define MG_E_RD 18 /* rd */ |
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#define MG_E_RING 19 /* ring */ |
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#define MG_E_RS 20 /* rs */ |
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#define MG_E_SIDES 21 /* sides */ |
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#define MG_E_SPH 22 /* sph */ |
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#define MG_E_TD 23 /* td */ |
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#define MG_E_TORUS 24 /* torus */ |
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#define MG_E_TS 25 /* ts */ |
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#define MG_E_VERTEX 26 /* v */ |
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#define MG_E_XF 27 /* xf */ |
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/* end of Version 1 entities */ |
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#define MG_E_FACEH 28 /* fh */ |
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/* end of Version 2 entities */ |
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|
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#define MG_NENTITIES 29 /* total # entities */ |
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|
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#define MG_NELIST {28,29} /* entity count for version 1 and up */ |
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|
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#define MG_NAMELIST {"#","c","cct","cone","cmix","cspec","cxy","cyl","ed",\ |
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"f","i","ies","ir","m","n","o","p","prism","rd",\ |
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"ring","rs","sides","sph","td","torus","ts","v","xf",\ |
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"fh"} |
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|
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#define MG_MAXELEN 6 |
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|
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extern char mg_ename[MG_NENTITIES][MG_MAXELEN]; |
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|
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/* Handler routines for each entity and unknown ones */ |
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#ifdef NOPROTO |
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extern int (*mg_ehand[MG_NENTITIES])(); |
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extern int (*mg_uhand)(); |
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extern int mg_defuhand(); |
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#else |
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extern int (*mg_ehand[MG_NENTITIES])(int argc, char **argv); |
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extern int (*mg_uhand)(int argc, char **argv); |
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extern int mg_defuhand(int, char **); |
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#endif |
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|
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extern unsigned mg_nunknown; /* count of unknown entities */ |
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|
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/* Error codes */ |
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#define MG_OK 0 /* normal return value */ |
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#define MG_EUNK 1 /* unknown entity */ |
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#define MG_EARGC 2 /* wrong number of arguments */ |
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#define MG_ETYPE 3 /* argument type error */ |
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#define MG_EILL 4 /* illegal argument value */ |
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#define MG_EUNDEF 5 /* undefined reference */ |
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#define MG_ENOFILE 6 /* cannot open input file */ |
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#define MG_EINCL 7 /* error in included file */ |
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#define MG_EMEM 8 /* out of memory */ |
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#define MG_ESEEK 9 /* file seek error */ |
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#define MG_EBADMAT 10 /* bad material specification */ |
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#define MG_ELINE 11 /* input line too long */ |
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#define MG_ECNTXT 12 /* unmatched context close */ |
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|
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#define MG_NERRS 13 |
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|
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extern char *mg_err[MG_NERRS]; /* list of error messages */ |
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|
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/* |
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* The general process for running the parser is to fill in the mg_ehand |
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* array with handlers for each entity you know how to handle. |
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* Then, call mg_init to fill in the rest. This function will report |
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* an error and quit if you try to support an inconsistent set of entities. |
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* For each file you want to parse, call mg_load with the file name. |
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* To read from standard input, use NULL as the file name. |
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* For additional control over error reporting and file management, |
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* use mg_open, mg_read, mg_parse and mg_close instead of mg_load. |
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* To pass an entity of your own construction to the parser, use |
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* the mg_handle function rather than the mg_ehand routines directly. |
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* (The first argument to mg_handle is the entity #, or -1.) |
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* To free any data structures and clear the parser, use mg_clear. |
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* If there is an error, mg_load, mg_open, mg_parse, mg_handle and |
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* mg_fgoto will return an error from the list above. In addition, |
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* mg_load will report the error to stderr. The mg_read routine |
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* returns 0 when the end of file has been reached. |
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*/ |
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|
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#define MG_MAXLINE 4096 /* maximum input line length */ |
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#define MG_MAXARGC (MG_MAXLINE/4) /* maximum argument count */ |
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|
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typedef struct mg_fctxt { |
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char fname[96]; /* file name */ |
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FILE *fp; /* stream pointer */ |
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int fid; /* unique file context id */ |
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char inpline[MG_MAXLINE]; /* input line */ |
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int lineno; /* line number */ |
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struct mg_fctxt *prev; /* previous context */ |
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} MG_FCTXT; |
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|
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typedef struct { |
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int fid; /* file this position is for */ |
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int lineno; /* line number in file */ |
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long offset; /* offset from beginning */ |
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} MG_FPOS; |
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|
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extern MG_FCTXT *mg_file; /* current file context */ |
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|
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#ifdef NOPROTO |
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extern void mg_init(); /* fill in mg_ehand array */ |
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extern int mg_load(); /* parse a file */ |
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extern int mg_open(); /* open new input file */ |
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extern int mg_read(); /* read next line */ |
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extern int mg_parse(); /* parse current line */ |
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extern void mg_fgetpos(); /* get position on input file */ |
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extern int mg_fgoto(); /* go to position on input file */ |
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extern void mg_close(); /* close input file */ |
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extern void mg_clear(); /* clear parser */ |
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extern int mg_handle(); /* handle an entity */ |
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#else |
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extern void mg_init(void); /* fill in mg_ehand array */ |
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extern int mg_load(char *); /* parse a file */ |
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extern int mg_open(MG_FCTXT *, char *); /* open new input file */ |
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extern int mg_read(void); /* read next line */ |
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extern int mg_parse(void); /* parse current line */ |
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extern void mg_fgetpos(MG_FPOS *); /* get position on input file */ |
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extern int mg_fgoto(MG_FPOS *); /* go to position on input file */ |
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extern void mg_close(void); /* close input file */ |
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extern void mg_clear(void); /* clear parser */ |
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extern int mg_handle(int, int, char **); /* handle an entity */ |
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#endif |
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|
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#ifndef MG_NQCD |
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#define MG_NQCD 5 /* default number of divisions */ |
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#endif |
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|
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extern int mg_nqcdivs; /* divisions per quarter circle */ |
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|
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/* |
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* The following library routines are included for your convenience: |
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*/ |
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|
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#ifdef NOPROTO |
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extern int mg_entity(); /* get entity number from its name */ |
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extern int isint(); /* non-zero if integer format */ |
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extern int isintd(); /* same with delimiter set */ |
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extern int isflt(); /* non-zero if floating point format */ |
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extern int isfltd(); /* same with delimiter set */ |
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extern int isname(); /* non-zero if legal identifier name */ |
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extern int badarg(); /* check argument format */ |
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extern int e_include(); /* expand include entity */ |
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extern int e_pipe(); /* expand piped command */ |
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extern int e_sph(); /* expand sphere as other entities */ |
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extern int e_torus(); /* expand torus as other entities */ |
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extern int e_cyl(); /* expand cylinder as other entities */ |
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extern int e_ring(); /* expand ring as other entities */ |
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extern int e_cone(); /* expand cone as other entities */ |
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extern int e_prism(); /* expand prism as other entities */ |
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extern int e_faceh(); /* expand face w/ holes as face */ |
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#else |
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extern int mg_entity(char *); /* get entity number from its name */ |
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extern int isint(char *); /* non-zero if integer format */ |
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extern int isintd(char *, char *); /* same with delimiter set */ |
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extern int isflt(char *); /* non-zero if floating point format */ |
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extern int isfltd(char *, char *); /* same with delimiter set */ |
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extern int isname(char *); /* non-zero if legal identifier name */ |
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extern int badarg(int, char **, char *);/* check argument format */ |
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extern int e_include(int, char **); /* expand include entity */ |
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extern int e_pipe(int, char **); /* expand piped command */ |
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extern int e_sph(int, char **); /* expand sphere as other entities */ |
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extern int e_torus(int, char **); /* expand torus as other entities */ |
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extern int e_cyl(int, char **); /* expand cylinder as other entities */ |
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extern int e_ring(int, char **); /* expand ring as other entities */ |
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extern int e_cone(int, char **); /* expand cone as other entities */ |
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extern int e_prism(int, char **); /* expand prism as other entities */ |
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extern int e_faceh(int, char **); /* expand face w/ holes as face */ |
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#endif |
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|
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/************************************************************************ |
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* Definitions for 3-d vector manipulation functions |
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*/ |
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|
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#ifdef SMLFLT |
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#define FLOAT float |
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#define FTINY (1e-3) |
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#else |
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#define FLOAT double |
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#define FTINY (1e-6) |
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#endif |
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#define FHUGE (1e10) |
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|
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typedef FLOAT FVECT[3]; |
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|
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#define VCOPY(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2]) |
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#define DOT(v1,v2) ((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2]) |
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#define VSUM(vr,v1,v2,f) ((vr)[0]=(v1)[0]+(f)*(v2)[0], \ |
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(vr)[1]=(v1)[1]+(f)*(v2)[1], \ |
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(vr)[2]=(v1)[2]+(f)*(v2)[2]) |
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|
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#define is0vect(v) (DOT(v,v) <= FTINY*FTINY) |
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|
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#define round0(x) if (x <= FTINY && x >= -FTINY) x = 0 |
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|
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#ifdef NOPROTO |
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extern double normalize(); /* normalize a vector */ |
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#else |
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extern double normalize(FVECT); /* normalize a vector */ |
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extern void fcross(FVECT,FVECT,FVECT);/* cross product of two vectors */ |
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#endif |
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|
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/************************************************************************ |
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* Definitions for context handling routines |
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* (materials, colors, vectors) |
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*/ |
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|
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#define C_CMINWL 380 /* minimum wavelength */ |
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#define C_CMAXWL 780 /* maximum wavelength */ |
| 239 |
#define C_CNSS 41 /* number of spectral samples */ |
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#define C_CWLI ((C_CMAXWL-C_CMINWL)/(C_CNSS-1)) |
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#define C_CMAXV 10000 /* nominal maximum sample value */ |
| 242 |
#define C_CLPWM (683./C_CMAXV) /* peak lumens/watt multiplier */ |
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|
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#define C_CSSPEC 01 /* flag if spectrum is set */ |
| 245 |
#define C_CDSPEC 02 /* flag if defined w/ spectrum */ |
| 246 |
#define C_CSXY 04 /* flag if xy is set */ |
| 247 |
#define C_CDXY 010 /* flag if defined w/ xy */ |
| 248 |
#define C_CSEFF 020 /* flag if efficacy set */ |
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|
| 250 |
typedef struct { |
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int clock; /* incremented each change */ |
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char *client_data; /* pointer to private client-owned data */ |
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short flags; /* what's been set */ |
| 254 |
short ssamp[C_CNSS]; /* spectral samples, min wl to max */ |
| 255 |
long ssum; /* straight sum of spectral values */ |
| 256 |
float cx, cy; /* xy chromaticity value */ |
| 257 |
float eff; /* efficacy (lumens/watt) */ |
| 258 |
} C_COLOR; |
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|
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#define C_DEFCOLOR { 1, NULL, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\ |
| 261 |
{C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 262 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 263 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 264 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 265 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 266 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
| 267 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV},\ |
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(long)C_CNSS*C_CMAXV, 1./3., 1./3., 178.006 } |
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|
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#define c_cval(c,l) ((double)(c)->ssamp[((l)-C_MINWL)/C_CWLI] / (c)->ssum) |
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|
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#define C_1SIDEDTHICK 0.005 /* assumed thickness of 1-sided mat. */ |
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|
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typedef struct { |
| 275 |
int clock; /* incremented each change -- resettable */ |
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char *client_data; /* pointer to private client-owned data */ |
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int sided; /* 1 if surface is 1-sided, 0 for 2-sided */ |
| 278 |
float nr, ni; /* index of refraction, real and imaginary */ |
| 279 |
float rd; /* diffuse reflectance */ |
| 280 |
C_COLOR rd_c; /* diffuse reflectance color */ |
| 281 |
float td; /* diffuse transmittance */ |
| 282 |
C_COLOR td_c; /* diffuse transmittance color */ |
| 283 |
float ed; /* diffuse emittance */ |
| 284 |
C_COLOR ed_c; /* diffuse emittance color */ |
| 285 |
float rs; /* specular reflectance */ |
| 286 |
C_COLOR rs_c; /* specular reflectance color */ |
| 287 |
float rs_a; /* specular reflectance roughness */ |
| 288 |
float ts; /* specular transmittance */ |
| 289 |
C_COLOR ts_c; /* specular transmittance color */ |
| 290 |
float ts_a; /* specular transmittance roughness */ |
| 291 |
} C_MATERIAL; /* material context */ |
| 292 |
|
| 293 |
typedef struct { |
| 294 |
int clock; /* incremented each change -- resettable */ |
| 295 |
char *client_data; /* pointer to private client-owned data */ |
| 296 |
FVECT p, n; /* point and normal */ |
| 297 |
} C_VERTEX; /* vertex context */ |
| 298 |
|
| 299 |
#define C_DEFMATERIAL {1,NULL,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,\ |
| 300 |
C_DEFCOLOR,0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.} |
| 301 |
#define C_DEFVERTEX {1,NULL,{0.,0.,0.},{0.,0.,0.}} |
| 302 |
|
| 303 |
extern C_COLOR *c_ccolor; /* the current color */ |
| 304 |
extern char *c_ccname; /* current color name */ |
| 305 |
extern C_MATERIAL *c_cmaterial; /* the current material */ |
| 306 |
extern char *c_cmname; /* current material name */ |
| 307 |
extern C_VERTEX *c_cvertex; /* the current vertex */ |
| 308 |
extern char *c_cvname; /* current vertex name */ |
| 309 |
|
| 310 |
#ifdef NOPROTO |
| 311 |
extern int c_hcolor(); /* handle color entity */ |
| 312 |
extern int c_hmaterial(); /* handle material entity */ |
| 313 |
extern int c_hvertex(); /* handle vertex entity */ |
| 314 |
extern void c_clearall(); /* clear context tables */ |
| 315 |
extern C_MATERIAL *c_getmaterial(); /* get a named material */ |
| 316 |
extern C_VERTEX *c_getvert(); /* get a named vertex */ |
| 317 |
extern C_COLOR *c_getcolor(); /* get a named color */ |
| 318 |
extern void c_ccvt(); /* fix color representation */ |
| 319 |
extern int c_isgrey(); /* check if color is grey */ |
| 320 |
#else |
| 321 |
extern int c_hcolor(int, char **); /* handle color entity */ |
| 322 |
extern int c_hmaterial(int, char **); /* handle material entity */ |
| 323 |
extern int c_hvertex(int, char **); /* handle vertex entity */ |
| 324 |
extern void c_clearall(void); /* clear context tables */ |
| 325 |
extern C_MATERIAL *c_getmaterial(char *); /* get a named material */ |
| 326 |
extern C_VERTEX *c_getvert(char *); /* get a named vertex */ |
| 327 |
extern C_COLOR *c_getcolor(char *); /* get a named color */ |
| 328 |
extern void c_ccvt(C_COLOR *, int); /* fix color representation */ |
| 329 |
extern int c_isgrey(C_COLOR *); /* check if color is grey */ |
| 330 |
#endif |
| 331 |
|
| 332 |
/************************************************************************* |
| 333 |
* Definitions for hierarchical object name handler |
| 334 |
*/ |
| 335 |
|
| 336 |
extern int obj_nnames; /* depth of name hierarchy */ |
| 337 |
extern char **obj_name; /* names in hierarchy */ |
| 338 |
|
| 339 |
#ifdef NOPROTO |
| 340 |
extern int obj_handler(); /* handle an object entity */ |
| 341 |
extern void obj_clear(); /* clear object stack */ |
| 342 |
#else |
| 343 |
extern int obj_handler(int, char **); /* handle an object entity */ |
| 344 |
extern void obj_clear(void); /* clear object stack */ |
| 345 |
#endif |
| 346 |
|
| 347 |
/************************************************************************** |
| 348 |
* Definitions for hierarchical transformation handler |
| 349 |
*/ |
| 350 |
|
| 351 |
typedef FLOAT MAT4[4][4]; |
| 352 |
|
| 353 |
#ifdef BSD |
| 354 |
#define copymat4(m4a,m4b) bcopy((char *)m4b,(char *)m4a,sizeof(MAT4)) |
| 355 |
#else |
| 356 |
#define copymat4(m4a,m4b) (void)memcpy((char *)m4a,(char *)m4b,sizeof(MAT4)) |
| 357 |
#endif |
| 358 |
|
| 359 |
#define MAT4IDENT { {1.,0.,0.,0.}, {0.,1.,0.,0.}, \ |
| 360 |
{0.,0.,1.,0.}, {0.,0.,0.,1.} } |
| 361 |
|
| 362 |
extern MAT4 m4ident; |
| 363 |
|
| 364 |
#define setident4(m4) copymat4(m4, m4ident) |
| 365 |
|
| 366 |
/* regular transformation */ |
| 367 |
typedef struct { |
| 368 |
MAT4 xfm; /* transform matrix */ |
| 369 |
FLOAT sca; /* scalefactor */ |
| 370 |
} XF; |
| 371 |
|
| 372 |
#define identxf(xp) (void)(setident4((xp)->xfm),(xp)->sca=1.0) |
| 373 |
|
| 374 |
#define XF_MAXDIM 8 /* maximum array dimensions */ |
| 375 |
|
| 376 |
struct xf_array { |
| 377 |
MG_FPOS spos; /* starting position on input */ |
| 378 |
int ndim; /* number of array dimensions */ |
| 379 |
struct { |
| 380 |
short i, n; /* current count and maximum */ |
| 381 |
char arg[8]; /* string argument value */ |
| 382 |
} aarg[XF_MAXDIM]; |
| 383 |
}; |
| 384 |
|
| 385 |
typedef struct xf_spec { |
| 386 |
long xid; /* unique transform id */ |
| 387 |
short xac; /* context argument count */ |
| 388 |
short rev; /* boolean true if vertices reversed */ |
| 389 |
XF xf; /* cumulative transformation */ |
| 390 |
struct xf_array *xarr; /* transformation array pointer */ |
| 391 |
struct xf_spec *prev; /* previous transformation context */ |
| 392 |
} XF_SPEC; /* followed by argument buffer */ |
| 393 |
|
| 394 |
extern XF_SPEC *xf_context; /* current transform context */ |
| 395 |
extern char **xf_argend; /* last transform argument */ |
| 396 |
|
| 397 |
#define xf_ac(xf) ((xf)==NULL ? 0 : (xf)->xac) |
| 398 |
#define xf_av(xf) (xf_argend - (xf)->xac) |
| 399 |
|
| 400 |
#define xf_argc xf_ac(xf_context) |
| 401 |
#define xf_argv xf_av(xf_context) |
| 402 |
|
| 403 |
/* |
| 404 |
* The transformation handler should do most of the work that needs |
| 405 |
* doing. Just pass it any xf entities, then use the associated |
| 406 |
* functions to transform and translate points, transform vectors |
| 407 |
* (without translation), rotate vectors (without scaling) and scale |
| 408 |
* values appropriately. |
| 409 |
* |
| 410 |
* The routines xf_xfmpoint, xf_xfmvect and xf_rotvect take two |
| 411 |
* 3-D vectors (which may be identical), transforms the second and |
| 412 |
* puts the result into the first. |
| 413 |
*/ |
| 414 |
|
| 415 |
#ifdef NOPROTO |
| 416 |
|
| 417 |
extern int xf_handler(); /* handle xf entity */ |
| 418 |
extern void xf_xfmpoint(); /* transform point */ |
| 419 |
extern void xf_xfmvect(); /* transform vector */ |
| 420 |
extern void xf_rotvect(); /* rotate vector */ |
| 421 |
extern double xf_scale(); /* scale a value */ |
| 422 |
extern void xf_clear(); /* clear xf stack */ |
| 423 |
|
| 424 |
/* The following are support routines you probably won't call directly */ |
| 425 |
|
| 426 |
XF_SPEC *new_xf(); /* allocate new transform */ |
| 427 |
void free_xf(); /* free a transform */ |
| 428 |
int xf_aname(); /* name this instance */ |
| 429 |
long comp_xfid(); /* compute unique ID */ |
| 430 |
extern void multmat4(); /* m4a = m4b X m4c */ |
| 431 |
extern void multv3(); /* v3a = v3b X m4 (vectors) */ |
| 432 |
extern void multp3(); /* p3a = p3b X m4 (points) */ |
| 433 |
extern int xf(); /* interpret transform spec. */ |
| 434 |
|
| 435 |
#else |
| 436 |
|
| 437 |
extern int xf_handler(int, char **); /* handle xf entity */ |
| 438 |
extern void xf_xfmpoint(FVECT, FVECT); /* transform point */ |
| 439 |
extern void xf_xfmvect(FVECT, FVECT); /* transform vector */ |
| 440 |
extern void xf_rotvect(FVECT, FVECT); /* rotate vector */ |
| 441 |
extern double xf_scale(double); /* scale a value */ |
| 442 |
extern void xf_clear(void); /* clear xf stack */ |
| 443 |
|
| 444 |
/* The following are support routines you probably won't call directly */ |
| 445 |
|
| 446 |
XF_SPEC *new_xf(int, char **); /* allocate new transform */ |
| 447 |
void free_xf(XF_SPEC *); /* free a transform */ |
| 448 |
int xf_aname(struct xf_array *); /* name this instance */ |
| 449 |
long comp_xfid(MAT4); /* compute unique ID */ |
| 450 |
extern void multmat4(MAT4, MAT4, MAT4); /* m4a = m4b X m4c */ |
| 451 |
extern void multv3(FVECT, FVECT, MAT4); /* v3a = v3b X m4 (vectors) */ |
| 452 |
extern void multp3(FVECT, FVECT, MAT4); /* p3a = p3b X m4 (points) */ |
| 453 |
extern int xf(XF *, int, char **); /* interpret transform spec. */ |
| 454 |
|
| 455 |
#endif |
| 456 |
|
| 457 |
/************************************************************************ |
| 458 |
* Miscellaneous definitions |
| 459 |
*/ |
| 460 |
|
| 461 |
#ifndef PI |
| 462 |
#ifdef M_PI |
| 463 |
#define PI ((double)M_PI) |
| 464 |
#else |
| 465 |
#define PI 3.14159265358979323846 |
| 466 |
#endif |
| 467 |
#endif |
| 468 |
|
| 469 |
#ifndef MEM_PTR |
| 470 |
#define MEM_PTR void * |
| 471 |
#endif |
| 472 |
|
| 473 |
#endif /*MG_VMAJOR*/ |
