public float AngleBetween(IVector2D v)
{
IVector2D u1 = UnitVector();
IVector2D u2 = v.UnitVector();
float dp = u1.DotProduct(u2);
var f = (float)Math.Acos(dp);
return f.ToDegrees();
}
public Range ProjectOnto(IVector2D onto)
{
IVector2D ontoUnit = onto.UnitVector();
float min = ontoUnit.DotProduct(Point1);
float max = ontoUnit.DotProduct(Point2);
var r = new Range(min, max);
r = r.SortRange();
return r;
}