/// <summary>
/// Gets the 2 control point indices of the line closest to the specified point (x,y)
/// </summary>
public bool GetLineNear( PiecewiseLinearFunction1d pwlFunc, Point2 pt, out int cp0, out int cp1, float tolerance )
{
cp0 = -1;
cp1 = -1;
if ( pwlFunc.NumControlPoints < 2 )
{
return false;
}
float sqrTol = tolerance * tolerance;
LineSegment2 seg = new LineSegment2( );
for ( int cpIndex = 1; cpIndex < pwlFunc.NumControlPoints; ++cpIndex )
{
seg.Start = pwlFunc[ cpIndex - 1 ];
seg.End = pwlFunc[ cpIndex ];
if ( seg.GetSqrDistanceToPoint( pt ) < sqrTol )
{
cp0 = cpIndex - 1;
cp1 = cpIndex;
return true;
}
}
return false;
}
/// <summary>
/// Sets the function to be controller by this handler
/// </summary>
public PiecewiseGraphInputHandler( PiecewiseLinearFunction1d function )
: base(function)
{
}
