Adding "Per Layer Modifications" causes error

[ahimahas]

Hello!

Simple but unresolvable issue I have.

As you can see the below screenshot, when I add “Per Layer Modifications” to the gameObject that has AstarPath, simply it shows the error saying “AssertionException: Assertion failure. Value was False. Excepted: True”

All other options of “Add Rule” works but not the layer one.

How can I solve this?

./Packages/com.arongranberg.astar/Graphs/Utilities/UtilityJobs.cs:31)
Pathfinding.Jobs.Slice3D…ctor (Pathfinding.IntBounds outer, Pathfinding.IntBounds slice) (at ./Packages/com.arongranberg.astar/Graphs/Utilities/UtilityJobs.cs:23)
Pathfinding.Graphs.Grid.Rules.RulePerLayerModifications+<>c__DisplayClass4_0.b__0 (Pathfinding.Graphs.Grid.Rules.GridGraphRules+Context context) (at ./Packages/com.arongranberg.astar/Graphs/Grid/Rules/RulePerLayerModifications.cs:53)
Pathfinding.Graphs.Grid.Rules.GridGraphRules.CallActions (System.Collections.Generic.List1[T] actions, Pathfinding.Graphs.Grid.Rules.GridGraphRules+Context context) (at ./Packages/com.arongranberg.astar/Graphs/Grid/Rules/GridGraphRules.cs:120) UnityEngine.Debug:LogException(Exception) Pathfinding.Graphs.Grid.Rules.GridGraphRules:CallActions(List1, Context) (at ./Packages/com.arongranberg.astar/Graphs/Grid/Rules/GridGraphRules.cs:122)
Pathfinding.Graphs.Grid.Rules.d__13:MoveNext() (at ./Packages/com.arongranberg.astar/Graphs/Grid/Rules/GridGraphRules.cs:137)
Pathfinding.d__21:MoveNext() (at ./Packages/com.arongranberg.astar/Graphs/GridGraph.cs:1848)
d__128:MoveNext() (at ./Packages/com.arongranberg.astar/Core/AstarPath.cs:1860)
d__127:MoveNext() (at ./Packages/com.arongranberg.astar/Core/AstarPath.cs:1744)
Pathfinding.AstarPathEditor:MenuScan() (at ./Packages/com.arongranberg.astar/Editor/AstarPathEditor.cs:1366)
Pathfinding.<>c__DisplayClass73_0:b__0() (at ./Packages/com.arongranberg.astar/Editor/AstarPathEditor.cs:826)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions() (at /Users/bokken/build/output/unity/unity/Editor/Mono/EditorApplication.cs:363)

[aron_granberg]

Thanks. That rule can only be used with height testing enabled, which means it cannot be used in 2D mode.
I’ll include a nice error message in the inspector in the next update, and a better error message when scanning.

[ahimahas]

Thanks for your feedback @aron_granberg

In that case, what is the workaround for 2D games who need to check penalty per each tile? Do you have any examples or video tutorials? The reason I tried to use the above rule is to set a cost in certain grid tile (ex. forest) for controlling agent move speed. In theory, it seems it could be possible if I check all tiles programmatically when the game is launched but any possibility to set those values before the game playing, using Unity Inspector?

[aron_granberg]

Hi

Currently, the best way is to write a custom grid graph rule: Writing Custom Grid Graph Rules - A* Pathfinding Project
Or you can modify all nodes manually: Graph Updates - A* Pathfinding Project (though this is less robust as it doesn’t naturally combine with graph updates).

[ahimahas]

Appreciated it. it helped a lot to me.