Connecting recast graphs at runtime

General Recast graph
#1

Hi, I’m working on 16km2 open world with multiple recast graph and using Realistic Car Controller (physic movement) The vehicle has Seeker with Funnel and Smooth modifiers. I have a problem with moving between contacting graphs. I’m checking IsPathPossible and if not I’m connecting closest nodes with GraphNode.Connect in a WorkItem. Nodes connect but in a weird way, that makes my vehicle unable to physically follow the path. The connection looks like it’s parallel not perpendicular to the graph edge.
I’m connecting nodes:
startNeighbor = startNode.Graph.GetNearest(end).node;
and
endNeighbor = endNode.Graph.GetNearest(start).node;
start node is where path starts and end node where is the end point of path

image
image1206×988 123 KB

The cyan line is the connection, green line is the path, darker line is where graphs meet. I want to move forward, the funnel should make it straight, right?

What I am doing wrong?

#2

Hi

Connecting two graphs like that is usually not recommended. Is there a reason you cannot have a single graph?

#3

What is the recommended way of connecting them?
I made one graph for one terrain and I have lots of them. It’s easier to work with a graph that exists only where it should be, recalculations should be faster too. I load and unload graphs and terrains only near the player. The world is quite big (16km2) and may be bigger in the future

#4

You could use the NavmeshPrefab - A* Pathfinding Project component
Or alternatively the ProceduralGraphMover - A* Pathfinding Project

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