/*
* $Id: contour.h,v 1.8 2004/07/01 17:10:04 broeker Exp $
*/
/* GNUPLOT - contour.h */
/*[
* Copyright 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_CONTOUR_H
# define GNUPLOT_CONTOUR_H
/* #if... / #include / #define collection: */
#include "syscfg.h"
#include "gp_types.h"
#include "dynarray.h"
#include "graph3d.h"
#define DEFAULT_CONTOUR_LEVELS 5
#define DEFAULT_NUM_APPROX_PTS 5
#define DEFAULT_CONTOUR_ORDER 4
#define MAX_BSPLINE_ORDER 10
/* Type definitions */
typedef enum en_contour_kind {
/* Method of drawing the contour lines found */
CONTOUR_KIND_LINEAR,
CONTOUR_KIND_CUBIC_SPL,
CONTOUR_KIND_BSPLINE
} t_contour_kind;
typedef enum en_contour_levels_kind {
/* How contour levels are set */
LEVELS_AUTO, /* automatically selected */
LEVELS_INCREMENTAL, /* user specified start & incremnet */
LEVELS_DISCRETE /* user specified discrete levels */
} t_contour_levels_kind;
/* Used to allocate the tri-diag matrix. */
typedef double tri_diag[3];
/* Variables of contour.c needed by other modules: */
extern char contour_format[32];
extern t_contour_kind contour_kind;
extern t_contour_levels_kind contour_levels_kind;
extern int contour_levels;
extern int contour_order;
extern int contour_pts;
extern int contour_firstlinetype;
extern TBOOLEAN contour_sortlevels;
/* storage for z levels to draw contours at */
extern dynarray dyn_contour_levels_list;
#define contour_levels_list ((double *)dyn_contour_levels_list.v)
/* Prototypes of functions exported by contour.c */
struct gnuplot_contours *contour __PROTO((int num_isolines, struct iso_curve *iso_lines));
int solve_tri_diag __PROTO((tri_diag m[], double r[], double x[], int n));
#endif /* GNUPLOT_CONTOUR_H */