/*!
* \file src/polygon.h
*
* \brief Prototypes for polygon editing routines.
*
*
*
* Copyright.
\n
*
* PCB, interactive printed circuit board design
*
* Copyright (C) 1994,1995,1996 Thomas Nau
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Contact addresses for paper mail and Email:
*
* Thomas Nau, Schlehenweg 15, 88471 Baustetten, Germany
*
* Thomas.Nau@rz.uni-ulm.de
*/
#ifndef PCB_POLYGON_H
#define PCB_POLYGON_H
#include "global.h"
/* Implementation constants */
#define POLY_CIRC_SEGS 40
#define POLY_CIRC_SEGS_F ((float)POLY_CIRC_SEGS)
/*!
* \brief Adjustment to make the segments outline the circle rather than
* connect points on the circle:
* \f$ 1 - cos ( \frac {\alpha} {2} ) < \frac { ( \frac {\alpha} {2} ) ^ 2 } {2} \f$
*/
#define POLY_CIRC_RADIUS_ADJ (1.0 + M_PI / POLY_CIRC_SEGS_F * \
M_PI / POLY_CIRC_SEGS_F / 2.0)
/*!
* \brief Polygon diverges from modelled arc no more than
* MAX_ARC_DEVIATION * thick.
*/
#define POLY_ARC_MAX_DEVIATION 0.02
/* Prototypes */
void polygon_init (void);
Cardinal polygon_point_idx (PolygonType * polygon, PointType * point);
Cardinal polygon_point_contour (PolygonType * polygon, Cardinal point);
Cardinal prev_contour_point (PolygonType * polygon, Cardinal point);
Cardinal next_contour_point (PolygonType * polygon, Cardinal point);
Cardinal GetLowestDistancePolygonPoint (PolygonType *,
Coord, Coord);
bool RemoveExcessPolygonPoints (LayerType *, PolygonType *);
void GoToPreviousPoint (void);
void ClosePolygon (void);
void CopyAttachedPolygonToLayer (void);
int PolygonHoles (PolygonType *ptr, const BoxType *range,
int (*callback) (PLINE *, void *user_data),
void *user_data);
int PlowsPolygon (DataType *, int, void *, void *,
int (*callback) (DataType *, LayerType *, PolygonType *, int, void *, void *, void *),
void *userdata);
void ComputeNoHoles (PolygonType *poly);
POLYAREA * original_poly(PolygonType *);
POLYAREA * ContourToPoly (PLINE *);
POLYAREA * PolygonToPoly (PolygonType *);
POLYAREA * RectPoly (Coord x1, Coord x2, Coord y1, Coord y2);
POLYAREA * CirclePoly (Coord x, Coord y, Coord radius);
POLYAREA * OctagonPoly(Coord x, Coord y, Coord radius);
POLYAREA * LinePoly(LineType *l, Coord thick);
POLYAREA * ArcPoly(ArcType *l, Coord thick);
POLYAREA * PinPoly(PinType *l, Coord thick, Coord clear);
POLYAREA * BoxPolyBloated (BoxType *box, Coord radius);
void frac_circle (PLINE *, Coord, Coord, Vector, int);
int InitClip(DataType *d, LayerType *l, PolygonType *p);
void RestoreToPolygon(DataType *, int, void *, void *);
void ClearFromPolygon(DataType *, int, void *, void *);
bool IsPointInPolygon (Coord, Coord, Coord, PolygonType *);
bool IsPointInPolygonIgnoreHoles (Coord, Coord, PolygonType *);
bool IsRectangleInPolygon (Coord, Coord, Coord, Coord, PolygonType *);
bool isects (POLYAREA *, PolygonType *, bool);
bool MorphPolygon (LayerType *, PolygonType *);
void NoHolesPolygonDicer (PolygonType *p, const BoxType *clip,
void (*emit) (PLINE *, void *), void *user_data);
void PolyToPolygonsOnLayer (DataType *, LayerType *, POLYAREA *, FlagType);
#endif