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/*
* Geo.h -- Header for common geometric routines.
*
* Authors : Patrick Lecoanet.
* Creation date :
*
* $Id$
*/
/*
* Copyright (c) 1993 - 1999 CENA, Patrick Lecoanet --
*
* This code is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this code; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _Geo_h
#define _Geo_h
#include "Types.h"
#include "Attrs.h"
#include "List.h"
#include <math.h>
#include <limits.h>
#ifndef MIN
#define MIN(a, b) ((a) <= (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) ((a) >= (b) ? (a) : (b))
#endif
#ifndef ABS
#define ABS(a) ((a) < 0 ? -(a) : (a))
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846264338327
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923
#endif
#ifndef M_PI_4
#define M_PI_4 0.78539816339744830962
#endif
#define PRECISION_LIMIT 1.0e-6
#define X_PRECISION_LIMIT 5.0e-2
#define LINE_END_POINTS 6
#define DegreesToRadian(angle) \
(M_PI * (double) (angle) / 180.0)
#define REAL_TO_INT(double) \
(((int) ((double) + (((double) > 0) ? 0.5 : -0.5))))
void
Anchor2Origin(RadarPoint *position,
RadarDim width,
RadarDim height,
RadarAnchor anchor,
RadarPoint *origin);
void
Origin2Anchor(RadarPoint *origin,
RadarDim width,
RadarDim height,
RadarAnchor anchor,
RadarPoint *position);
void
BBox2XRect(RadarBBox *bbox,
XRectangle *rect);
void
GetStringBBox(char *str,
RadarFont font,
RadarPos x,
RadarPos y,
RadarBBox *str_bbox);
void
ResetBBox(RadarBBox *bbox);
void
CopyBBox(RadarBBox *bbox_from,
RadarBBox *bbox_to);
void
IntersectBBox(RadarBBox *bbox1,
RadarBBox *bbox2,
RadarBBox *bbox_inter);
RadarBool
IsEmptyBBox(RadarBBox *bbox);
void
AddBBoxToBBox(RadarBBox *bbox,
RadarBBox *bbox2);
void
AddPointToBBox(RadarBBox *bbox,
RadarPos px,
RadarPos py);
void
AddPointsToBBox(RadarBBox *bbox,
RadarPoint *points,
int num_points);
void
AddStringToBBox(RadarBBox *bbox,
char *str,
RadarFont font,
RadarPos cx,
RadarPos cy);
RadarBool
PointInBBox(RadarBBox *bbox,
RadarPos x,
RadarPos y);
int
LineInBBox(RadarPoint *p1,
RadarPoint *p2,
RadarBBox *bbox);
int
BBoxInBBox(RadarBBox *bbox1,
RadarBBox *bbox2);
int
PolylineInBBox(RadarPoint *points,
int num_points,
int width,
int cap_style,
int join_style,
RadarBBox *bbox);
int
PolygonInBBox(RadarPoint *points,
int num_points,
RadarBBox *bbox);
int
OvalInBBox(RadarPoint *center,
int width,
int height,
RadarBBox *bbox);
RadarBool
HorizLineToArc(RadarReal x1,
RadarReal x2,
RadarReal y,
RadarReal rx,
RadarReal ry,
RadarReal start_angle,
RadarReal angle_extent);
RadarBool
VertLineToArc(RadarReal x,
RadarReal y1,
RadarReal y2,
RadarReal rx,
RadarReal ry,
RadarReal start_angle,
RadarReal angle_extent);
RadarBool
PointInAngle(int start_angle,
int angle_extent,
RadarPoint *p);
double
RectangleToPointDist(RadarBBox *bbox,
RadarPoint *p);
double
LineToPointDist(RadarPoint *p1,
RadarPoint *p2,
RadarPoint *p);
double
PolygonToPointDist(RadarPoint *points,
int num_points,
RadarPoint *p);
double
PolylineToPointDist(RadarPoint *points,
int num_points,
int width,
int cap_style,
int join_style,
RadarPoint *p);
double
OvalToPointDist(RadarPoint *center,
int width,
int height,
unsigned int line_width,
RadarPoint *p);
void
GetButtPoints(RadarPoint *p1,
RadarPoint *p2,
int width,
RadarBool projecting,
RadarPoint *c1,
RadarPoint *c2);
RadarBool
GetMiterPoints(RadarPoint *p1,
RadarPoint *p2,
RadarPoint *p3,
int width,
RadarPoint *c1,
RadarPoint *c2);
RadarBool
IntersectLines(RadarPoint *a1,
RadarPoint *a2,
RadarPoint *b1,
RadarPoint *b2,
RadarPoint *pi);
void
ShiftLine(RadarPoint *p1,
RadarPoint *p2,
RadarReal dist,
RadarPoint *p3,
RadarPoint *p4);
void
InsetPolygon(RadarPoint *p,
int num_points,
RadarDim inset);
void
BezierSubdivide(RadarPoint *controls,
RadarReal t,
RadarBool first);
void
SmoothPathWithBezier(RadarList from_points,
RadarList to_points);
void
GetBezierPath(RadarList from_points,
RadarList to_points);
void
GetArcPath(RadarReal start_angle,
RadarReal end_angle,
int type,
RadarList to_points);
void
GetLineEnd(RadarPoint *p1,
RadarPoint *p2,
unsigned int line_width,
int cap_style,
LineEnd end_style,
RadarPoint *points);
#endif /* _Geo_h */
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