Function GetSurfaceSlopeAngle

TombEngine/Math/Geometry.cpp:142–148

	}

	short GetSurfaceSlopeAngle(const Vector3& normal, const Vector3& axis)
	{
		if (normal == -axis)
			return 0;

		return FROM_RAD(acos(normal.Dot(-axis)));
	}

	short GetSurfaceAspectAngle(const Vector3& normal, const Vector3& axis)
	{