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/*
* $Id: util3d.h,v 1.8 2004/04/13 17:24:03 broeker Exp $
*/
/* GNUPLOT - util3d.h */
/*[
* Copyright 1986 - 1993, 1998, 1999, 2004 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
#ifndef GNUPLOT_UTIL3D_H
# define GNUPLOT_UTIL3D_H
/* HBB 990828: moved all those variable decl's and #defines to new
* file "graph3d.h", as the definitions are in graph3d.c, not in
* util3d.c. Include that file from here, to ensure everything is
* known */
#include "graph3d.h"
/* All the necessary information about one vertex. FIXME: Might need
* an lp_style_type pointer element? */
/* HBB 20000617: moved this definition here, from hidden3d.c */
typedef struct vertex {
coordval x, y, z; /* vertex coordinates */
int style; /* point symbol type (if any) */
#ifdef PM3D
coordval real_z;
#endif
} vertex;
typedef vertex GPHUGE * p_vertex;
/* Utility macros for vertices: */
#define FLAG_VERTEX_AS_UNDEFINED(v) \
do { (v).z = -2.0; } while (0)
#define VERTEX_IS_UNDEFINED(v) ((v).z == -2.0)
#define V_EQUAL(a,b) ( GE(0.0, fabs((a)->x - (b)->x) + \
fabs((a)->y - (b)->y) + fabs((a)->z - (b)->z)) )
/* Maps from normalized space to terminal coordinates */
#define TERMCOORD(v,xvar,yvar) \
{ \
xvar = ((int)((v)->x * xscaler)) + xmiddle; \
yvar = ((int)((v)->y * yscaler)) + ymiddle; \
}
/* Prototypes of functions exported by "util3d.c" */
void edge3d_intersect __PROTO((struct coordinate GPHUGE *, int, double *, double *, double *));
TBOOLEAN two_edge3d_intersect __PROTO((struct coordinate GPHUGE *, int, double *, double *, double *));
void mat_scale __PROTO((double sx, double sy, double sz, double mat[4][4]));
void mat_rot_x __PROTO((double teta, double mat[4][4]));
void mat_rot_z __PROTO((double teta, double mat[4][4]));
void mat_mult __PROTO((double mat_res[4][4], double mat1[4][4], double mat2[4][4]));
void map3d_xyz __PROTO((double x, double y, double z, p_vertex out));
void map3d_xy __PROTO((double x, double y, double z, unsigned int *xt, unsigned int *yt));
void draw3d_line __PROTO((p_vertex, p_vertex, struct lp_style_type *));
void draw3d_line_unconditional __PROTO((p_vertex, p_vertex, struct lp_style_type *, int));
void draw3d_point __PROTO((p_vertex v, struct lp_style_type *lp));
/* HBB NEW 20031218: 3D polyline support */
void polyline3d_start __PROTO((p_vertex v1));
void polyline3d_next __PROTO((p_vertex v2, struct lp_style_type *lp));
#endif /* GNUPLOT_UTIL3D_H */
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