kicad/common/preview_items/arc_geom_manager.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017-2021 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
*/
#include <preview_items/arc_geom_manager.h>
#include <math/util.h> // for KiROUND
#include <geometry/eda_angle.h>
#include <trigo.h>
using namespace KIGFX::PREVIEW;
///< Snap an angle to the nearest 45 degrees
static EDA_ANGLE snapAngle( const EDA_ANGLE& aAngle )
{
return ANGLE_45 * KiROUND( aAngle / ANGLE_45 );
}
bool ARC_GEOM_MANAGER::acceptPoint( const VECTOR2I& aPt )
{
switch( getStep() )
{
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case SET_ORIGIN: return setOrigin( aPt );
case SET_START: return setStart( aPt );
case SET_ANGLE: return setEnd( aPt );
case COMPLETE: return false;
}
return false;
}
void ARC_GEOM_MANAGER::SetClockwise( bool aCw )
{
m_clockwise = aCw;
m_directionLocked = true;
setGeometryChanged();
}
void ARC_GEOM_MANAGER::ToggleClockwise()
{
m_clockwise = !m_clockwise;
m_directionLocked = true;
setGeometryChanged();
}
VECTOR2I ARC_GEOM_MANAGER::GetOrigin() const
{
return m_origin;
}
VECTOR2I ARC_GEOM_MANAGER::GetStartRadiusEnd() const
{
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VECTOR2I vec( static_cast<int>( m_radius ), 0 );
RotatePoint( vec, -m_startAngle );
return m_origin +vec;
}
VECTOR2I ARC_GEOM_MANAGER::GetEndRadiusEnd() const
{
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VECTOR2I vec( static_cast<int>( m_radius ), 0 );
RotatePoint( vec, -m_endAngle );
return m_origin + vec;
}
double ARC_GEOM_MANAGER::GetRadius() const
{
return m_radius;
}
EDA_ANGLE ARC_GEOM_MANAGER::GetStartAngle() const
{
EDA_ANGLE angle = m_startAngle;
if( m_clockwise )
angle -= ANGLE_360;
return -angle;
}
EDA_ANGLE ARC_GEOM_MANAGER::GetSubtended() const
{
EDA_ANGLE angle = m_endAngle - m_startAngle;
if( m_endAngle <= m_startAngle )
angle += ANGLE_360;
if( m_clockwise )
angle -= ANGLE_360;
return -angle;
}
bool ARC_GEOM_MANAGER::setOrigin( const VECTOR2I& aOrigin )
{
m_origin = aOrigin;
m_startAngle = ANGLE_0;
m_endAngle = ANGLE_0;
return true;
}
bool ARC_GEOM_MANAGER::setStart( const VECTOR2I& aEnd )
{
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const VECTOR2I radVec = aEnd - m_origin;
m_radius = radVec.EuclideanNorm();
m_startAngle = EDA_ANGLE( radVec );
if( m_angleSnap )
m_startAngle = snapAngle( m_startAngle );
// normalise to 0..360
while( m_startAngle < ANGLE_0 )
m_startAngle += ANGLE_360;
m_endAngle = m_startAngle;
return m_radius != 0.0;
}
bool ARC_GEOM_MANAGER::setEnd( const VECTOR2I& aCursor )
{
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const VECTOR2I radVec = aCursor - m_origin;
m_endAngle = EDA_ANGLE( radVec );
if( m_angleSnap )
m_endAngle = snapAngle( m_endAngle );
// normalise to 0..360
while( m_endAngle < ANGLE_0 )
m_endAngle += ANGLE_360;
if( !m_directionLocked )
{
EDA_ANGLE ccwAngle = m_endAngle - m_startAngle;
if( m_endAngle <= m_startAngle )
ccwAngle += ANGLE_360;
EDA_ANGLE cwAngle = std::abs( ccwAngle - ANGLE_360 );
if( std::min( ccwAngle, cwAngle ) >= ANGLE_90 )
m_directionLocked = true;
else
m_clockwise = cwAngle < ccwAngle;
}
else if( std::abs( GetSubtended() ) < ANGLE_90 )
{
m_directionLocked = false;
}
// if the end is the same as the start, this is a bad point
return m_endAngle != m_startAngle;
}