update

Packages/com.arongranberg.astar/Editor/GraphEditors/LayerGridGraphEditor.cs

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+using UnityEngine;
+using UnityEditor;
+using Pathfinding.Graphs.Grid;
+
+namespace Pathfinding {
+	[CustomGraphEditor(typeof(LayerGridGraph), "Layered Grid Graph")]
+	public class LayerGridGraphEditor : GridGraphEditor {
+		protected override void DrawMiddleSection (GridGraph graph) {
+			var layerGridGraph = graph as LayerGridGraph;
+
+			DrawNeighbours(graph);
+
+			layerGridGraph.characterHeight = EditorGUILayout.DelayedFloatField("Character Height", layerGridGraph.characterHeight);
+			DrawMaxClimb(graph);
+
+			DrawMaxSlope(graph);
+			DrawErosion(graph);
+		}
+
+		protected override void DrawMaxClimb (GridGraph graph) {
+			var layerGridGraph = graph as LayerGridGraph;
+
+			base.DrawMaxClimb(graph);
+			layerGridGraph.maxStepHeight = Mathf.Clamp(layerGridGraph.maxStepHeight, 0, layerGridGraph.characterHeight);
+
+			if (layerGridGraph.maxStepHeight >= layerGridGraph.characterHeight) {
+				EditorGUILayout.HelpBox("Max step height needs to be smaller or equal to character height", MessageType.Info);
+			}
+		}
+
+		protected override void DrawCollisionEditor (GraphCollision collision) {
+			base.DrawCollisionEditor(collision);
+
+			if (collision.thickRaycast) {
+				EditorGUILayout.HelpBox("Note: Thick raycast cannot be used with this graph type", MessageType.Error);
+			}
+		}
+
+		protected override void DrawUse2DPhysics (GraphCollision collision) {
+			// 2D physics does not make sense for a layered grid graph
+			collision.use2D = false;
+		}
+	}
+}