void
    OpenAtPoint 
            (        
Path  |     path  |          | 
                
uint  |     pathNodeIndex  |          | 
                
Int3  |     position  |          | 
                
uint  |     gScore  |          | 
                
        
)
    
    Open the node at a specific point. 
    Used internally by the A* algorithm.
Used when a path starts inside a node, or when an off-mesh link is used to move to a point inside this node.