/*

 * extrude.h

 *

 * FUNCTION:

 * prototypes for privately used subroutines for the tubing library

 *

 * HISTORY:

 * Linas Vepstas 1991

 */

#include "port.h" /* for gleDouble */

#ifndef M_PI

#define M_PI  3.14159265358979323846

#endif

/* ============================================================ */

/* 

 * Provides choice of calling subroutine, vs. invoking macro.

 * Basically, inlines the source, or not.

 * Trades performance for executable size.

 */

#define INLINE_INTERSECT

#ifdef INLINE_INTERSECT

#define INNERSECT(sect,p,n,v1,v2) { INTERSECT(sect,p,n,v1,v2); }

#else

#define INNERSECT(sect,p,n,v1,v2) intersect(sect,p,n,v1,v2)

#endif /* INLINE_INTERSECT */

/* ============================================================ */

/* The folowing defines give a kludgy way of accessing the qmesh primitive */

/*

#define bgntmesh _emu_qmesh_bgnqmesh

#define endtmesh _emu_qmesh_endqmesh

#define c3f _emu_qmesh_c3f

#define n3f _emu_qmesh_n3f

#define v3f _emu_qmesh_v3f

*/

/* ============================================================ */

extern void up_sanity_check (gleDouble up[3],      /* up vector for contour */

                      int npoints,              /* numpoints in poly-line */

                      gleDouble point_array[][3]);   /* polyline */

extern void draw_raw_style_end_cap (int ncp,     /* number of contour points */

                             gleDouble contour[][2],     /* 2D contour */

                             gleDouble zval,             /* where to draw cap */

                             int frontwards);    /* front or back cap */

extern void draw_round_style_cap_callback (int iloop,

                                  double cap[][3],

                                  float face_color[3],

                                  gleDouble cut_vector[3],

                                  gleDouble bisect_vector[3],

                                  double norms[][3],

                                  int frontwards);

extern void draw_angle_style_front_cap (int ncp,

                           gleDouble bi[3],

                           gleDouble point_array[][3]);

extern void extrusion_raw_join (int ncp,        /* number of contour points */

                         gleDouble contour[][2],    /* 2D contour */

                         gleDouble cont_normal[][2],/* 2D contour normal vecs */

                         gleDouble up[3],           /* up vector for contour */

                         int npoints,           /* numpoints in poly-line */

                         gleDouble point_array[][3],        /* polyline */

                         float color_array[][3],        /* color of polyline */

                         gleDouble xform_array[][2][3]);  /* 2D contour xforms */

extern void extrusion_round_or_cut_join (int ncp, /* number of contour points */

                         gleDouble contour[][2],    /* 2D contour */

                         gleDouble cont_normal[][2],/* 2D contour normal vecs */

                           gleDouble up[3],         /* up vector for contour */

                           int npoints,         /* numpoints in poly-line */

                           gleDouble point_array[][3],      /* polyline */

                           float color_array[][3],      /* color of polyline */

                           gleDouble xform_array[][2][3]);  /* 2D contour xforms */

extern void extrusion_angle_join (int ncp,      /* number of contour points */

                         gleDouble contour[][2],    /* 2D contour */

                         gleDouble cont_normal[][2],/* 2D contour normal vecs */

                           gleDouble up[3],         /* up vector for contour */

                           int npoints,         /* numpoints in poly-line */

                           gleDouble point_array[][3],      /* polyline */

                           float color_array[][3],      /* color of polyline */

                           gleDouble xform_array[][2][3]);  /* 2D contour xforms */

/* -------------------------- end of file -------------------------------- */