Recast graph for a tall mesh area with a steep incline

General
1

Is the recast graph suitable for use with tall meshes with very steep inclines? I’m trying to generate a navmesh for a steep ramp model that’s 100 units high, but when I set the “Walkable climb” setting to a higher value to accomodate the slope of the ramp, the graph seems to stretch from the edges of the recast bounds directly to points part-way up the ramp.

The problem can be alleviated by setting “cell size” very small and lowering the “Walkable climb”, but I quickly hit out of memory errors when doing this.

I’m essentially testing the ability to generate a graph suitable for navigating a mountain, which could be very tall. Is there any good way of achieving this with the recast graph?

I’m using the latest version 3.4.0.5.

Here’s an example of the issue:

2

Hi

That is a very steep mountain!

The Y coordinates of the mesh nodes might end up very far from the real values of the ground. This is however usually not a problem since the pathfinding doesn’t rely on those values that much (e.g raycasting is done for character positioning).
You could try using a tiled recast graph, that might help a bit.
Though I think a grid graph would be better suited for this kind of world.