etl::hermite<Vector> curve(blinepoint0.get_vertex(), blinepoint1.get_vertex(),
blinepoint0.get_tangent2(), blinepoint1.get_tangent1());
etl::hermite<Vector> curve(blinepoint0.get_vertex(), blinepoint1.get_vertex(),
blinepoint0.get_tangent2(), blinepoint1.get_tangent1());