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/* Copyright (c) 1995 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* RCSid: $Id$ */ |
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/* |
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* Header file for MGF interpreter |
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*/ |
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#ifndef _MGF_PARSER_H_ |
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#define _MGF_PARSER_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* must include stdio.h before us */ |
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/* Entities (order doesn't really matter) */ |
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#ifndef MG_VMAJOR |
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/* must include stdio.h and stdlib.h before us */ |
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#define MG_VMAJOR 2 /* major version number */ |
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#define MG_VMINOR 0 /* minor version number */ |
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/* 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 */ |
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#define MG_E_CCT 2 /* cct */ |
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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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#define MG_NENTITIES 28 /* total # entities */ |
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#define MG_NENTITIES 29 /* total # entities */ |
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#define MG_NELIST {28,29} /* entity count for version 1 and up */ |
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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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"ring","rs","sides","sph","td","torus","ts","v","xf",\ |
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"fh"} |
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#define MG_MAXELEN 6 |
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extern char mg_ename[MG_NENTITIES][MG_MAXELEN]; |
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/* Handler routines for each entity */ |
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#ifdef NOPROTO |
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extern int (*mg_ehand[MG_NENTITIES])(); |
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#else |
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/* Handler routines for each entity and unknown ones */ |
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extern int (*mg_ehand[MG_NENTITIES])(int argc, char **argv); |
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#endif |
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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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extern unsigned mg_nunknown; /* count of unknown entities */ |
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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_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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#define MG_NERRS 11 |
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#define MG_NERRS 13 |
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extern char *mg_err[MG_NERRS]; |
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extern char *mg_err[MG_NERRS]; /* list of error messages */ |
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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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extern MG_FCTXT *mg_file; /* current file context */ |
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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 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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#ifndef MG_NQCD |
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#define MG_NQCD 5 /* default number of divisions */ |
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* The following library routines are included for your convenience: |
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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 isflt(); /* non-zero if floating point format */ |
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extern int isname(); /* non-zero if legal identifier name */ |
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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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#endif |
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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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/************************************************************************ |
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* Definitions for 3-d vector manipulation functions |
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#define round0(x) if (x <= FTINY && x >= -FTINY) x = 0 |
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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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#endif |
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extern void fcross(FVECT,FVECT,FVECT);/* cross product of two vectors */ |
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/************************************************************************ |
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* Definitions for context handling routines |
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#define C_CSEFF 020 /* flag if efficacy set */ |
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typedef struct { |
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int clock; /* incremented each change */ |
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short flags; /* what's been set */ |
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short ssamp[C_CNSS]; /* spectral samples, min wl to max */ |
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long ssum; /* straight sum of spectral values */ |
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float cx, cy; /* xy chromaticity value */ |
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float eff; /* efficacy (lumens/watt) */ |
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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 */ |
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short ssamp[C_CNSS]; /* spectral samples, min wl to max */ |
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long ssum; /* straight sum of spectral values */ |
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float cx, cy; /* xy chromaticity value */ |
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float eff; /* efficacy (lumens/watt) */ |
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} C_COLOR; |
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#define C_DEFCOLOR { 1, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\ |
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#define C_DEFCOLOR { 1, NULL, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\ |
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{C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
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C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
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C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\ |
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typedef struct { |
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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 */ |
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float nr, ni; /* index of refraction, real and imaginary */ |
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float rd; /* diffuse reflectance */ |
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typedef struct { |
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int clock; /* incremented each change -- resettable */ |
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char *client_data; /* pointer to private client-owned data */ |
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FVECT p, n; /* point and normal */ |
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} C_VERTEX; /* vertex context */ |
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#define C_DEFMATERIAL {1,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,C_DEFCOLOR,\ |
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0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.} |
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#define C_DEFVERTEX {1,{0.,0.,0.},{0.,0.,0.}} |
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#define C_DEFMATERIAL {1,NULL,0,1.,0.,0.,C_DEFCOLOR,0.,C_DEFCOLOR,0.,\ |
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C_DEFCOLOR,0.,C_DEFCOLOR,0.,0.,C_DEFCOLOR,0.} |
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#define C_DEFVERTEX {1,NULL,{0.,0.,0.},{0.,0.,0.}} |
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extern C_COLOR *c_ccolor; /* the current color */ |
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extern char *c_ccname; /* current color name */ |
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extern C_VERTEX *c_cvertex; /* the current vertex */ |
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extern char *c_cvname; /* current vertex name */ |
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#ifdef NOPROTO |
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extern int c_hcolor(); /* handle color entity */ |
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extern int c_hmaterial(); /* handle material entity */ |
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extern int c_hvertex(); /* handle vertex entity */ |
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extern void c_clearall(); /* clear context tables */ |
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extern C_MATERIAL *c_getmaterial(); /* get a named material */ |
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extern C_VERTEX *c_getvert(); /* get a named vertex */ |
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extern C_COLOR *c_getcolor(); /* get a named color */ |
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extern void c_ccvt(); /* fix color representation */ |
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extern int c_isgrey(); /* check if color is grey */ |
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#else |
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extern int c_hcolor(int, char **); /* handle color entity */ |
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extern int c_hmaterial(int, char **); /* handle material entity */ |
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extern int c_hvertex(int, char **); /* handle vertex entity */ |
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extern C_COLOR *c_getcolor(char *); /* get a named color */ |
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extern void c_ccvt(C_COLOR *, int); /* fix color representation */ |
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extern int c_isgrey(C_COLOR *); /* check if color is grey */ |
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#endif |
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/************************************************************************* |
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* Definitions for hierarchical object name handler |
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extern int obj_nnames; /* depth of name hierarchy */ |
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extern char **obj_name; /* names in hierarchy */ |
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#ifdef NOPROTO |
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extern int obj_handler(); /* handle an object entity */ |
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extern void obj_clear(); /* clear object stack */ |
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#else |
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extern int obj_handler(int, char **); /* handle an object entity */ |
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extern void obj_clear(void); /* clear object stack */ |
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#endif |
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/************************************************************************** |
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* Definitions for hierarchical transformation handler |
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typedef struct xf_spec { |
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long xid; /* unique transform id */ |
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short xav0; /* zeroeth argument in xf_argv array */ |
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short xac; /* transform argument count */ |
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short xac; /* context argument count */ |
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short rev; /* boolean true if vertices reversed */ |
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XF xf; /* cumulative transformation */ |
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struct xf_array *xarr; /* transformation array pointer */ |
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struct xf_spec *prev; /* previous transformation context */ |
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} XF_SPEC; /* followed by argument buffer */ |
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extern int xf_argc; /* total # transform args. */ |
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extern char **xf_argv; /* transform arguments */ |
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extern XF_SPEC *xf_context; /* current context */ |
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extern XF_SPEC *xf_context; /* current transform context */ |
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extern char **xf_argend; /* last transform argument */ |
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#define xf_ac(xf) ((xf)==NULL ? 0 : (xf)->xac) |
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#define xf_av(xf) (xf_argend - (xf)->xac) |
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#define xf_argc xf_ac(xf_context) |
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#define xf_argv xf_av(xf_context) |
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|
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/* |
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* The transformation handler should do most of the work that needs |
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* doing. Just pass it any xf entities, then use the associated |
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* puts the result into the first. |
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*/ |
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#ifdef NOPROTO |
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extern int xf_handler(); /* handle xf entity */ |
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extern void xf_xfmpoint(); /* transform point */ |
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extern void xf_xfmvect(); /* transform vector */ |
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extern void xf_rotvect(); /* rotate vector */ |
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extern double xf_scale(); /* scale a value */ |
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extern void xf_clear(); /* clear xf stack */ |
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/* The following are support routines you probably won't call directly */ |
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extern void multmat4(); /* m4a = m4b X m4c */ |
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extern void multv3(); /* v3a = v3b X m4 (vectors) */ |
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extern void multp3(); /* p3a = p3b X m4 (points) */ |
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extern int xf(); /* interpret transform spec. */ |
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#else |
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extern int xf_handler(int, char **); /* handle xf entity */ |
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extern void xf_xfmpoint(FVECT, FVECT); /* transform point */ |
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extern void xf_xfmvect(FVECT, FVECT); /* transform vector */ |
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/* The following are support routines you probably won't call directly */ |
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XF_SPEC *new_xf(int, char **); /* allocate new transform */ |
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void free_xf(XF_SPEC *); /* free a transform */ |
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int xf_aname(struct xf_array *); /* name this instance */ |
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long comp_xfid(MAT4); /* compute unique ID */ |
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extern void multmat4(MAT4, MAT4, MAT4); /* m4a = m4b X m4c */ |
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extern void multv3(FVECT, FVECT, MAT4); /* v3a = v3b X m4 (vectors) */ |
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extern void multp3(FVECT, FVECT, MAT4); /* p3a = p3b X m4 (points) */ |
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extern int xf(XF *, int, char **); /* interpret transform spec. */ |
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#endif |
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/************************************************************************ |
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* Miscellaneous definitions |
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*/ |
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#ifndef PI |
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#ifdef M_PI |
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#define PI M_PI |
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#define PI ((double)M_PI) |
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#else |
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#define PI 3.14159265358979323846 |
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#endif |
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#ifdef DCL_ATOF |
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extern double atof(); |
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#endif |
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#ifndef MEM_PTR |
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#define MEM_PTR void * |
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#endif |
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extern MEM_PTR malloc(); |
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extern MEM_PTR calloc(); |
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extern MEM_PTR realloc(); |
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extern void free(); |
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#endif /*MG_VMAJOR*/ |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _MGF_PARSER_H_ */ |
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