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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2010 Wayne Stambaugh <stambaughw@verizon.net>
* Copyright (C) 2015-2017 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 <macros.h>
#include <trigo.h>
#include <transform.h>
#include <common.h>
#include <eda_rect.h>
bool TRANSFORM::operator==( const TRANSFORM& aTransform ) const
{
return ( x1 == aTransform.x1 &&
y1 == aTransform.y1 &&
x2 == aTransform.x2 &&
y2 == aTransform.y2 );
}
wxPoint TRANSFORM::TransformCoordinate( const wxPoint& aPoint ) const
{
return wxPoint( ( x1 * aPoint.x ) + ( y1 * aPoint.y ),
( x2 * aPoint.x ) + ( y2 * aPoint.y ) );
}
EDA_RECT TRANSFORM::TransformCoordinate( const EDA_RECT& aRect ) const
{
EDA_RECT rect;
rect.SetOrigin( TransformCoordinate( aRect.GetOrigin() ) );
rect.SetEnd( TransformCoordinate( aRect.GetEnd() ) );
return rect;
}
/*
* Calculate the Inverse mirror/rotation transform.
*/
TRANSFORM TRANSFORM::InverseTransform( ) const
{
int invx1;
int invx2;
int invy1;
int invy2;
/* Calculates the inverse matrix coeffs:
* for a matrix m{x1, x2, y1, y2}
* the inverse matrix is 1/(x1*y2 -x2*y1) m{y2,-x2,-y1,x1)
*/
int det = x1*y2 -x2*y1; // Is never null, because the inverse matrix exists
invx1 = y2/det;
invx2 = -x2/det;
invy1 = -y1/det;
invy2 = x1/det;
TRANSFORM invtransform( invx1, invy1, invx2, invy2 );
return invtransform;
}
bool TRANSFORM::MapAngles( int* aAngle1, int* aAngle2 ) const
{
wxCHECK_MSG( aAngle1 != NULL && aAngle2 != NULL, false,
wxT( "Cannot map NULL point angles." ) );
int Angle, Delta;
double x, y, t;
bool swap = false;
Delta = *aAngle2 - *aAngle1;
if( Delta >= 1800 )
{
*aAngle1 -= 1;
*aAngle2 += 1;
}
x = cos( DECIDEG2RAD( *aAngle1 ) );
y = sin( DECIDEG2RAD( *aAngle1 ) );
t = x * x1 + y * y1;
y = x * x2 + y * y2;
x = t;
*aAngle1 = KiROUND( RAD2DECIDEG( atan2( y, x ) ) );
x = cos( DECIDEG2RAD( *aAngle2 ) );
y = sin( DECIDEG2RAD( *aAngle2 ) );
t = x * x1 + y * y1;
y = x * x2 + y * y2;
x = t;
*aAngle2 = KiROUND( RAD2DECIDEG( atan2( y, x ) ) );
NORMALIZE_ANGLE_POS( *aAngle1 );
NORMALIZE_ANGLE_POS( *aAngle2 );
if( *aAngle2 < *aAngle1 )
*aAngle2 += 3600;
if( *aAngle2 - *aAngle1 > 1800 ) // Need to swap the two angles
{
Angle = (*aAngle1);
*aAngle1 = (*aAngle2);
*aAngle2 = Angle;
NORMALIZE_ANGLE_POS( *aAngle1 );
NORMALIZE_ANGLE_POS( *aAngle2 );
if( *aAngle2 < *aAngle1 )
*aAngle2 += 3600;
swap = true;
}
if( Delta >= 1800 )
{
*aAngle1 += 1;
*aAngle2 -= 1;
}
return swap;
}
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