public StraightLineF(PointF pointF, VectorF normalVectorF)
{
//A*x + B*y = A * x_0 + B * y_0
var unitVectorF = normalVectorF.UnitVector();
A = unitVectorF.X;
B = unitVectorF.Y;
C = -(A * pointF.X + B * pointF.Y);
}
