Interface INodeModifier

void ModifyNode (

int	dataIndex	Index of the node. This is the index in the data arrays for the graph update, not necessarily the index in the graph.
int	dataX	X coordinate of the node, relative to the updated region.
int	dataLayer	Layer (Y) coordinate of the node, relative to the updated region.
int	dataZ	Z coordinate of the node, relative to the updated region.

)

Called for every node that is being updated.