kicad/eeschema/transform.cpp

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#include "macros.h"
#include "transform.h"
TRANSFORM& TRANSFORM::operator=( const TRANSFORM& aTransform )
{
if( this == &aTransform ) // Check for self assingnemt;
return *this;
x1 = aTransform.x1;
y1 = aTransform.y1;
x2 = aTransform.x2;
y2 = aTransform.y2;
return *this;
}
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 ) );
}
/*
* 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( *aAngle1 * M_PI / 1800.0 );
y = sin( *aAngle1 * M_PI / 1800.0 );
t = x * x1 + y * y1;
y = x * x2 + y * y2;
x = t;
*aAngle1 = (int) ( atan2( y, x ) * 1800.0 / M_PI + 0.5 );
x = cos( *aAngle2 * M_PI / 1800.0 );
y = sin( *aAngle2 * M_PI / 1800.0 );
t = x * x1 + y * y1;
y = x * x2 + y * y2;
x = t;
*aAngle2 = (int) ( atan2( y, x ) * 1800.0 / M_PI + 0.5 );
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;
}