update

Packages/com.arongranberg.astar/Editor/RuleEditors/RuleElevationPenaltyEditor.cs

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+using Pathfinding.Graphs.Grid.Rules;
+using UnityEditor;
+using UnityEngine;
+
+namespace Pathfinding {
+	/// <summary>Editor for the <see cref="RuleElevationPenalty"/> rule</summary>
+	[CustomGridGraphRuleEditor(typeof(RuleElevationPenalty), "Penalty from Elevation")]
+	public class RuleElevationPenaltyEditor : IGridGraphRuleEditor {
+		float lastChangedTime = -10000;
+
+		public void OnInspectorGUI (GridGraph graph, GridGraphRule rule) {
+			var target = rule as RuleElevationPenalty;
+
+			if (target.curve == null || target.curve.length == 0) target.curve = AnimationCurve.Linear(0, 0, 1, 1);
+			target.penaltyScale = EditorGUILayout.FloatField("Penalty Scale", target.penaltyScale);
+			target.penaltyScale = Mathf.Max(target.penaltyScale, 1.0f);
+
+			EditorGUILayout.LabelField("Elevation Range", "");
+			EditorGUI.BeginChangeCheck();
+			EditorGUI.indentLevel++;
+			target.elevationRange.x = EditorGUILayout.FloatField("Min", target.elevationRange.x);
+			target.elevationRange.y = EditorGUILayout.FloatField("Max", target.elevationRange.y);
+			target.elevationRange.x = Mathf.Max(target.elevationRange.x, 0);
+			target.elevationRange.y = Mathf.Max(target.elevationRange.y, target.elevationRange.x + 1.0f);
+			EditorGUI.indentLevel--;
+			if (EditorGUI.EndChangeCheck()) lastChangedTime = Time.realtimeSinceStartup;
+
+			target.curve = EditorGUILayout.CurveField(target.curve, Color.red, new Rect(0, 0, 1, 1));
+
+			EditorGUILayout.HelpBox("Nodes will get a penalty between 0 and " + target.penaltyScale.ToString("0") + " depending on their elevation above the grid graph plane", MessageType.None);
+		}
+
+		protected static readonly Color GizmoColorMax = new Color(222.0f/255, 113.0f/255, 33.0f/255, 0.5f);
+		protected static readonly Color GizmoColorMin = new Color(33.0f/255, 104.0f/255, 222.0f/255, 0.5f);
+
+		public void OnSceneGUI (GridGraph graph, GridGraphRule rule) {
+			var target = rule as RuleElevationPenalty;
+
+			// Draw some helpful gizmos in the scene view for a few seconds whenever the settings change
+			const float FullAlphaTime = 2.0f;
+			const float FadeoutTime = 0.5f;
+			float alpha = Mathf.SmoothStep(1, 0, (Time.realtimeSinceStartup - lastChangedTime - FullAlphaTime)/FadeoutTime);
+
+			if (alpha <= 0) return;
+
+			var currentTransform = graph.transform * Matrix4x4.Scale(new Vector3(graph.width, 1, graph.depth));
+			Handles.matrix = currentTransform.matrix;
+			var zTest = Handles.zTest;
+			Handles.zTest = UnityEngine.Rendering.CompareFunction.LessEqual;
+			Handles.color = GizmoColorMin * new Color(1.0f, 1.0f, 1.0f, alpha);
+			Handles.DrawAAConvexPolygon(new Vector3[] { new Vector3(0, target.elevationRange.x, 0), new Vector3(1, target.elevationRange.x, 0), new Vector3(1, target.elevationRange.x, 1), new Vector3(0, target.elevationRange.x, 1) });
+			Handles.color = GizmoColorMax * new Color(1.0f, 1.0f, 1.0f, alpha);
+			Handles.DrawAAConvexPolygon(new Vector3[] { new Vector3(0, target.elevationRange.y, 0), new Vector3(1, target.elevationRange.y, 0), new Vector3(1, target.elevationRange.y, 1), new Vector3(0, target.elevationRange.y, 1) });
+			Handles.zTest = zTest;
+			Handles.matrix = Matrix4x4.identity;
+
+			// Repaint the scene view until the alpha goes to zero
+			SceneView.RepaintAll();
+		}
+	}
+}