public PLine(Vector2 start, Vector2 end, uint thickness = 1) : base(thickness)
{
this.position = start;
this.end = end - start;
Slope = end - start;
Slope.Normalize();
vpcStart.Position.X = start.X;
vpcStart.Position.Y = start.Y;
vpcEnd.Position.X = end.X;
vpcEnd.Position.Y = end.Y;
}