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/*
* tube_gc.h
*
* FUNCTION:
* This file allows for easy changes to changes in the way the extrusion
* library handles state info (i.e. context).
*
* HISTORY:
* Linas Vepstas --- February 1993
* Added auto texture coord generation hacks, Linas April 1994
* Added tube.h include to define gleDouble, tad February 2002
*/
#include "tube.h"
#include "port.h" /* for gleVector */
typedef float gleColor[3];
typedef double gleTwoVec[2];
typedef struct {
/* public methods */
void (*bgn_gen_texture) (int, double);
void (*n3f_gen_texture) (float *);
void (*n3d_gen_texture) (double *);
void (*v3f_gen_texture) (float *, int, int);
void (*v3d_gen_texture) (double *, int, int);
void (*end_gen_texture) (void);
/* protected members -- "general knowledge" stuff */
int join_style;
/* arguments passed into extrusion code */
int ncp; /* number of contour points */
gleTwoVec *contour; /* 2D contour */
gleTwoVec *cont_normal; /* 2D contour normals */
gleDouble *up; /* up vector */
int npoints; /* number of points in polyline */
gleVector *point_array; /* path */
gleColor *color_array; /* path colors */
gleAffine *xform_array; /* contour xforms */
/* private members, used by texturing code */
int num_vert;
int segment_number;
double segment_length;
double accum_seg_len;
double prev_x;
double prev_y;
void (*save_bgn_gen_texture) (int, double);
void (*save_n3f_gen_texture) (float *);
void (*save_n3d_gen_texture) (double *);
void (*save_v3f_gen_texture) (float *, int, int);
void (*save_v3d_gen_texture) (double *, int, int);
void (*save_end_gen_texture) (void);
} gleGC;
extern gleGC *_gle_gc;
extern gleGC * gleCreateGC (void);
#define INIT_GC() {if (!_gle_gc) _gle_gc = gleCreateGC(); }
#define extrusion_join_style (_gle_gc->join_style)
#define __TUBE_CLOSE_CONTOUR (extrusion_join_style & TUBE_CONTOUR_CLOSED)
#define __TUBE_DRAW_CAP (extrusion_join_style & TUBE_JN_CAP)
#define __TUBE_DRAW_FACET_NORMALS (extrusion_join_style & TUBE_NORM_FACET)
#define __TUBE_DRAW_PATH_EDGE_NORMALS (extrusion_join_style & TUBE_NORM_PATH_EDGE)
#define __TUBE_STYLE (extrusion_join_style & TUBE_JN_MASK)
#define __TUBE_RAW_JOIN (extrusion_join_style & TUBE_JN_RAW)
#define __TUBE_CUT_JOIN (extrusion_join_style & TUBE_JN_CUT)
#define __TUBE_ANGLE_JOIN (extrusion_join_style & TUBE_JN_ANGLE)
#define __TUBE_ROUND_JOIN (extrusion_join_style & TUBE_JN_ROUND)
/* ======================= END OF FILE ========================== */
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