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Navmesh stairs

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How do you combine volumes/polygons from steps into one ramp? If I had a volume for each step, I'd have to do A* through each step.

 

Also, how do you do A* through the volumes/polygons? Do you have entrances and exits between each volume? How would you cut a shortcut across several volumes if there's a direct path?

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Simple answer - Nav meshes are usually a seperate  mesh simplification of the actual scenery geometries.

 

The stairs would often be simplified into a flat ramp surface

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