Added KD tree

Runtime/KDTree/KDQuery/Debug.cs

@@ -0,0 +1,56 @@
+/*MIT License
+
+Copyright(c) 2018 Vili Volčini / viliwonka
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#define KDTREE_VISUAL_DEBUG
+
+using System.Collections.Generic;
+using UnityEngine;
+using System;
+
+namespace DataStructures.ViliWonka.KDTree {
+
+    public partial class KDQuery {
+
+        // uses gizmos
+        public void DrawLastQuery() {
+
+            Color start = Color.red;
+            Color end   = Color.green;
+
+            start.a = 0.25f;
+            end.a = 0.25f;
+
+            for(int i = 0; i < queryIndex; i++) {
+
+                float val = i / (float)queryIndex;
+
+                Gizmos.color = Color.Lerp(end, start, val);
+
+                Bounds b = queueArray[i].node.bounds.Bounds;
+
+                Gizmos.DrawWireCube(b.center, b.size);
+            }
+        }
+    }
+
+}