kicad/include/geometry/shape_arc.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef __SHAPE_ARC_H
#define __SHAPE_ARC_H
#include <geometry/shape.h>
#include <geometry/seg.h>
class SHAPE_LINE_CHAIN;
class SHAPE_ARC : public SHAPE
{
public:
SHAPE_ARC() :
SHAPE( SH_ARC ), m_width( 0 ) {};
SHAPE_ARC( const VECTOR2I& aArcCenter, const VECTOR2I& aArcStartPoint,
double aCenterAngle, int aWidth = 0 ) :
SHAPE( SH_ARC ), m_p0( aArcStartPoint ), m_pc( aArcCenter ), m_centralAngle( aCenterAngle ),
m_width( aWidth )
{
}
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SHAPE_ARC( const SHAPE_ARC& aOther )
: SHAPE( SH_ARC )
{
m_p0 = aOther.m_p0;
m_pc = aOther.m_pc;
m_centralAngle = aOther.m_centralAngle;
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m_width = aOther.m_width;
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}
~SHAPE_ARC() {}
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SHAPE* Clone() const override
{
return new SHAPE_ARC( *this );
}
const VECTOR2I& GetP0() const { return m_p0; }
const VECTOR2I GetP1() const;
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const VECTOR2I& GetCenter() const { return m_pc; }
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const BOX2I BBox( int aClearance = 0 ) const override;
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bool Collide( const SEG& aSeg, int aClearance = 0 ) const override;
bool Collide( const VECTOR2I& aP, int aClearance = 0 ) const override;
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void SetWidth( int aWidth )
{
m_width = aWidth;
}
int GetWidth() const
{
return m_width;
}
bool IsSolid() const override
{
return true;
}
void Move( const VECTOR2I& aVector ) override
{
m_p0 += aVector;
m_pc += aVector;
}
int GetRadius() const;
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SEG GetChord() const
{
return SEG( m_p0, GetP1() );
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}
double GetCentralAngle() const;
double GetStartAngle() const;
double GetEndAngle() const;
/*
bool ConstructFromCorners( VECTOR2I aP0, VECTOR2I aP1, double aCenterAngle );
bool ConstructFromCircle( VECTOR2I aP0, double aRadius );
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bool ConstructFromCenterAndAngles( VECTOR2I aCenter, double aRadius, double aStartAngle, double aCenterAngle );
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bool ConstructFromCornerAndAngles( VECTOR2I aP0,
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double aStartAngle,
double aCenterAngle,
double aRadius );
*/
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/**
* Constructs a SHAPE_LINE_CHAIN of segments from a given arc
* @param aAccuracy maximum divergence from true arc given in internal units
* ** Note that the default of 500.0 here is given using ARC_DEF_HIGH_ACCURACY
* for pcbnew units. This is to allow common geometry collision functions
* Other programs should call this using explicit accuracy values
* TODO: unify KiCad internal units
*
* @return a SHAPE_LINE_CHAIN
*/
const SHAPE_LINE_CHAIN ConvertToPolyline( double aAccuracy = 500.0 ) const;
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private:
bool ccw( const VECTOR2I& aA, const VECTOR2I& aB, const VECTOR2I& aC ) const
{
return (ecoord) ( aC.y - aA.y ) * ( aB.x - aA.x ) >
(ecoord) ( aB.y - aA.y ) * ( aC.x - aA.x );
}
VECTOR2I m_p0, m_pc;
double m_centralAngle;
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int m_width;
};
#endif