The most commonly used overload operators are applied to the Nodes.

• Node[Property] return the field with the given name of the node.
• Node[Attribute] (graph attribute) return the attribute of the node. Only nodes that are part of the graph have graph attributes.
• Node[int] get the n-th successor of the first branch of the Node. (useless?)
• Node[NodeToInt] evaluate the function (NodeToInt) on the node.
• Node[NodeToFloat] evaluate the function (NodeToFloat) on the node.
• Node[NodeToDouble] evaluate the function (NodeToDouble) on the node.
• Node[Location] evaluate the Location of the Node. The Location object can be null.

E.g.

module A(float len) extends Sphere; 
protected void init()[ Axiom ==> A; ]
void run(){
    A a = first((*A*)); // get a A that belong to the graph.
 
    a[len]; // get the field "len" of the node a.
 
    // Attributes 
    println( (de.grogra.vecmath.geom.Sphere) // get the VOLUME of the node
	a[de.grogra.imp3d.VolumeAttribute.ATTRIBUTE] 
    );
 
    println( (de.grogra.imp3d.objects.Sphere) // get the SHAPE of the node
	a[de.grogra.imp3d.objects.Attributes.SHAPE]
    );
 
    // Functions 
    a[ORDER]; // return the branching order according to the L-System definition it is a turtle state funtion.
    a[Location.X]; // return the global X location of a;
    a[Location.XYZ]; // return the global location as a Point3d
 
}

• Node > Node
• Node >= Node
• Node < Node
• Node <= Node

All compare the IDs of the nodes.