bool DRAWSEGMENT::HitTest( const wxPoint& aPosition )
{
switch( m_Shape )
{
case S_CIRCLE:
case S_ARC:
{
wxPoint relPos = aPosition - GetCenter();
int radius = GetRadius();
int dist = KiROUND( EuclideanNorm( relPos ) );
if( abs( radius - dist ) <= ( m_Width / 2 ) )
{
if( m_Shape == S_CIRCLE )
return true;
// For arcs, the test point angle must be >= arc angle start
// and <= arc angle end
// However angle values > 360 deg are not easy to handle
// so we calculate the relative angle between arc start point and teast point
// this relative arc should be < arc angle if arc angle > 0 (CW arc)
// and > arc angle if arc angle < 0 (CCW arc)
double arc_angle_start = GetArcAngleStart(); // Always 0.0 ... 360 deg, in 0.1 deg
double arc_hittest = ArcTangente( relPos.y, relPos.x );
// Calculate relative angle between the starting point of the arc, and the test point
arc_hittest -= arc_angle_start;
// Normalise arc_hittest between 0 ... 360 deg
NORMALIZE_ANGLE_POS( arc_hittest );
// Check angle: inside the arc angle when it is > 0
// and outside the not drawn arc when it is < 0
if( GetAngle() >= 0.0 )
{
if( arc_hittest <= GetAngle() )
return true;
}
else
{
if( arc_hittest >= (3600.0 + GetAngle()) )
return true;
}
}
}
break;
case S_CURVE:
for( unsigned int i= 1; i < m_BezierPoints.size(); i++)
{
if( TestSegmentHit( aPosition, m_BezierPoints[i-1], m_BezierPoints[i-1], m_Width / 2 ) )
return true;
}
break;
case S_SEGMENT:
if( TestSegmentHit( aPosition, m_Start, m_End, m_Width / 2 ) )
return true;
break;
default:
wxASSERT( 0 );
break;
}
return false;
}
const EDA_RECT DRAWSEGMENT::GetBoundingBox() const
{
EDA_RECT bbox;
bbox.SetOrigin( m_Start );
switch( m_Shape )
{
case S_SEGMENT:
bbox.SetEnd( m_End );
break;
case S_CIRCLE:
bbox.Inflate( GetRadius() );
break;
case S_ARC:
{
bbox.Merge( m_End );
wxPoint end = m_End;
RotatePoint( &end, m_Start, -m_Angle );
bbox.Merge( end );
// Determine the starting quarter
// 0 right-bottom
// 1 left-bottom
// 2 left-top
// 3 right-top
unsigned int quarter = 0; // assume right-bottom
if( m_End.y < m_Start.y ) // change to left-top
quarter |= 3;
if( m_End.x < m_Start.x ) // for left side, the LSB is 2nd bit negated
quarter ^= 1;
int radius = GetRadius();
int angle = (int) GetArcAngleStart() % 900 + m_Angle;
bool directionCW = ( m_Angle > 0 ); // Is the direction of arc clockwise?
if( !directionCW )
{
angle = 900 - angle;
quarter = ( quarter + 3 ) % 4; // -1 modulo arithmetic
}
while( angle > 900 )
{
switch( quarter )
{
case 0:
bbox.Merge( wxPoint( m_Start.x, m_Start.y + radius ) ); // down
break;
case 1:
bbox.Merge( wxPoint( m_Start.x - radius, m_Start.y ) ); // left
break;
case 2:
bbox.Merge( wxPoint( m_Start.x, m_Start.y - radius ) ); // up
break;
case 3:
bbox.Merge( wxPoint( m_Start.x + radius, m_Start.y ) ); // right
break;
}
if( directionCW )
++quarter;
else
quarter += 3; // -1 modulo arithmetic
quarter %= 4;
angle -= 900;
}
}
break;
case S_POLYGON:
{
wxPoint p_end;
MODULE* module = GetParentModule();
for( unsigned ii = 0; ii < m_PolyPoints.size(); ii++ )
{
wxPoint pt = m_PolyPoints[ii];
if( module ) // Transform, if we belong to a module
{
RotatePoint( &pt, module->GetOrientation() );
pt += module->GetPosition();
}
if( ii == 0 )
p_end = pt;
bbox.SetX( std::min( bbox.GetX(), pt.x ) );
bbox.SetY( std::min( bbox.GetY(), pt.y ) );
p_end.x = std::max( p_end.x, pt.x );
p_end.y = std::max( p_end.y, pt.y );
}
bbox.SetEnd( p_end );
}
break;
default:
;
}
bbox.Inflate( ((m_Width+1) / 2) + 1 );
bbox.Normalize();
return bbox;
}
