kicad/libs/kimath/include/geometry/shape_circle.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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_CIRCLE_H
#define __SHAPE_CIRCLE_H
#include <geometry/shape.h>
#include <geometry/circle.h>
#include <math/box2.h>
#include <math/vector2d.h>
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#include <algorithm>
class SHAPE_CIRCLE : public SHAPE
{
public:
SHAPE_CIRCLE() :
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SHAPE( SH_CIRCLE ),
m_circle()
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{}
SHAPE_CIRCLE( const VECTOR2I& aCenter, int aRadius ) :
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SHAPE( SH_CIRCLE ),
m_circle( aCenter, aRadius )
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{}
SHAPE_CIRCLE( const CIRCLE& aCircle ) :
SHAPE( SH_CIRCLE ),
m_circle( aCircle )
{}
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SHAPE_CIRCLE( const SHAPE_CIRCLE& aOther ) :
SHAPE( SH_CIRCLE ),
m_circle( aOther.m_circle )
{};
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~SHAPE_CIRCLE()
{}
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SHAPE* Clone() const override
{
return new SHAPE_CIRCLE( *this );
}
SHAPE_CIRCLE& operator=( const SHAPE_CIRCLE& ) = default;
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const BOX2I BBox( int aClearance = 0 ) const override
{
const VECTOR2I rc( m_circle.Radius + aClearance, m_circle.Radius + aClearance );
return BOX2I( m_circle.Center - rc, rc * 2 );
}
bool Collide( const SEG& aSeg, int aClearance = 0, int* aActual = nullptr,
VECTOR2I* aLocation = nullptr ) const override
{
int minDist = aClearance + m_circle.Radius;
VECTOR2I pn = aSeg.NearestPoint( m_circle.Center );
ecoord dist_sq = ( pn - m_circle.Center ).SquaredEuclideanNorm();
if( dist_sq == 0 || dist_sq < SEG::Square( minDist ) )
{
if( aLocation )
*aLocation = pn;
if( aActual )
*aActual = std::max( 0, (int) sqrt( dist_sq ) - m_circle.Radius );
return true;
}
return false;
}
void SetRadius( int aRadius )
{
m_circle.Radius = aRadius;
}
void SetCenter( const VECTOR2I& aCenter )
{
m_circle.Center = aCenter;
}
int GetRadius() const
{
return m_circle.Radius;
}
const VECTOR2I GetCenter() const
{
return m_circle.Center;
}
const CIRCLE GetCircle() const
{
return m_circle;
}
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void Move( const VECTOR2I& aVector ) override
{
m_circle.Center += aVector;
}
void Rotate( double aAngle, const VECTOR2I& aCenter = { 0, 0 } ) override
{
m_circle.Center -= aCenter;
m_circle.Center = m_circle.Center.Rotate( aAngle );
m_circle.Center += aCenter;
}
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bool IsSolid() const override
{
return true;
}
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private:
CIRCLE m_circle;
};
#endif