+ ADD_VALUENODE(ValueNode_BLineCalcTangent,"blinecalctangent",_("BLine Tangent") );
+ ADD_VALUENODE(ValueNode_BLineCalcVertex,"blinecalcvertex", _("BLine Vertex") );
+ ADD_VALUENODE(ValueNode_BLineRevTangent,"blinerevtangent", _("Reverse Tangent") );