/// <summary>
/// Determine if this point hits the object
/// </summary>
/// <param name="hit"></param>
/// <returns></returns>
public override bool HitTest(PointF hit)
{
PointF center = Center;
float radius2 = GraphUtils.Square(Boundary.Width / 2);
float distance2 = GraphUtils.Square(hit.X - center.X) + GraphUtils.Square(hit.Y - center.Y);
return(distance2 < radius2);
}
/// <summary>
/// Clip the line destination to be outside of the shape if possible
/// </summary>
/// <param name="sourcePoint">The source point of the line</param>
/// <returns>The clipped line position</returns>
internal override PointF ClipLine(PointF sourcePoint)
{
float relX = Center.X - sourcePoint.X;
float relY = Center.Y - sourcePoint.Y;
float length = (float)Math.Sqrt(GraphUtils.Square(relX) + GraphUtils.Square(relY));
float newLength = length - Boundary.Width / 2.0f;
// If we have a length which is less that 0 then return just the center point
if (newLength < 0)
{
return(Center);
}
return(new PointF(sourcePoint.X + ((relX * newLength) / length), sourcePoint.Y + ((relY * newLength) / length)));
}