*

Assets/Editor/LevelEditor.cs

@@ -0,0 +1,62 @@
+using UnityEngine;
+using UnityEditor;
+using System.Collections;
+
+public class LevelEditor : EditorWindow
+{
+	string myString = "Hello World";
+	bool groupEnabled;
+	bool myBool = true;
+	float myFloat = 1.23f;
+	
+	// Add menu item named "My Window" to the Window menu
+	[MenuItem("Window/LevelEditor")]
+	public static void ShowWindow()
+	{
+		//Show existing window instance. If one doesn't exist, make one.
+		EditorWindow.GetWindow(typeof(LevelEditor));
+	}
+
+	float AlingToGrid(float value, float gridStep = 0.5f){
+		float div = value / gridStep;
+		int cellId = Mathf.FloorToInt (div);
+		float frac = div - (float)cellId;
+		return (float)cellId * gridStep + (Mathf.Abs(frac) > 0.5f ? gridStep : 0.0f);
+	}
+
+	Vector3 AlingToGrid(Vector3 value, float gridStep = 0.5f){
+		return new Vector3 (
+			AlingToGrid(value.x, gridStep),
+			AlingToGrid(value.y, gridStep),
+			AlingToGrid(value.z, gridStep));
+	}
+	
+	void OnGUI()
+	{
+		GUILayout.Label ("Blocks alignment", EditorStyles.boldLabel);
+		if (GUILayout.Button ("Aling position to grid")) {
+			foreach(var obj in Selection.objects){
+				GameObject go = obj as GameObject;
+				if(go != null){
+					go.transform.position = AlingToGrid(go.transform.position);
+				}
+			}
+		}
+
+		if (GUILayout.Button ("Aling rotation to grid")) {
+			foreach(var obj in Selection.objects){
+				GameObject go = obj as GameObject;
+				if(go != null){
+					go.transform.rotation =  Quaternion.Euler(AlingToGrid(go.transform.rotation.eulerAngles, 45.0f));
+				}
+			}
+		}
+
+		/*myString = EditorGUILayout.TextField ("Text Field", myString);
+		
+		groupEnabled = EditorGUILayout.BeginToggleGroup ("Optional Settings", groupEnabled);
+		myBool = EditorGUILayout.Toggle ("Toggle", myBool);
+		myFloat = EditorGUILayout.Slider ("Slider", myFloat, -3, 3);
+		EditorGUILayout.EndToggleGroup ();*/
+	}
+}