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/**
* @file transform.h
*/
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2007-2010 Wayne Stambaugh <stambaughw@gmail.com>
* Copyright The 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 _TRANSFORM_H_
#define _TRANSFORM_H_
#include <geometry/eda_angle.h>
#include <math/box2.h>
/**
* for transforming drawing coordinates for a wxDC device context.
*
* This probably should be a base class with all pure virtual methods and a WXDC_TRANSFORM
* derived class. Then in the future if some new device context is used, a new transform could
* be derived from the base class and all the drawable objects would have to do is provide
* overloaded draw methods to use the new transform.
*/
class TRANSFORM
{
public:
int x1;
int y1;
int x2;
int y2;
/**
* The default construct creates a transform that draws object is the normal orientation.
*/
TRANSFORM() :
x1( 1 ),
y1( 0 ),
x2( 0 ),
y2( 1 )
{}
TRANSFORM( int ax1, int ay1, int ax2, int ay2 ) :
x1( ax1 ),
y1( ay1 ),
x2( ax2 ),
y2( ay2 )
{}
bool operator==( const TRANSFORM& aTransform ) const;
bool operator!=( const TRANSFORM& aTransform ) const { return !( *this == aTransform ); }
/**
* Calculate a new coordinate according to the mirror/rotation transform.
* Useful to calculate actual coordinates of a point from coordinates relative to a symbol,
* which are given for a non-rotated,-non mirrored item.
* @param aPoint = The position to transform
* @return The transformed coordinate.
*/
VECTOR2I TransformCoordinate( const VECTOR2I& aPoint ) const;
/**
* Calculate a new rect according to the mirror/rotation transform.
* Useful to calculate actual coordinates of a point from coordinates relative to a symbol,
* which are given for a non-rotated,-non mirrored item.
* @param aRect = The rectangle to transform
* @return The transformed rectangle.
*/
BOX2I TransformCoordinate( const BOX2I& aRect ) const;
/**
* Calculate the Inverse mirror/rotation transform.
* Useful to calculate coordinates relative to a symbol, which must be for a non-rotated,
* non-mirrored item from the actual coordinate.
* @return The inverse transform.
*/
TRANSFORM InverseTransform( ) const;
/**
* Calculate new angles according to the transform.
*
* @param aAngle1 = The first angle to transform
* @param aAngle2 = The second angle to transform
* @return True if the angles were swapped during the transform.
*/
bool MapAngles( EDA_ANGLE* aAngle1, EDA_ANGLE* aAngle2 ) const;
};
namespace std
{
template <> struct hash<TRANSFORM>
{
size_t operator() ( const TRANSFORM& k ) const;
};
}
#endif // _TRANSFORM_H_
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