To listen for pointer events, NonDrawingGraphic is now used instead o…

…f an Image (results in slightly improved graphics performance)

Plugins/SimpleInput/Scripts/AxisInputs/Joystick.cs

@@ -12,7 +12,7 @@ public enum MovementAxes { XandY, X, Y };
 		public SimpleInput.AxisInput yAxis = new SimpleInput.AxisInput( "Vertical" );
 
 		private RectTransform joystickTR;
-		private Image background;
+		private Graphic background;
 
 		public MovementAxes movementAxes = MovementAxes.XandY;
 		public float valueMultiplier = 1f;
@@ -48,10 +48,10 @@ private void Awake()
 			joystickTR = (RectTransform) transform;
 			thumbTR = thumb.rectTransform;
 
-			Image bgImage = GetComponent<Image>();
-			if( bgImage != null )
+			Graphic bgGraphic = GetComponent<Graphic>();
+			if( bgGraphic )
 			{
-				background = bgImage;
+				background = bgGraphic;
 				background.raycastTarget = false;
 			}
 
@@ -67,6 +67,8 @@ private void Awake()
 
 			_1OverMovementAreaRadius = 1f / movementAreaRadius;
 			movementAreaRadiusSqr = movementAreaRadius * movementAreaRadius;
+
+			thumbTR.localPosition = Vector3.zero;
 		}
 
 		private void Start()
@@ -76,28 +78,17 @@ private void Start()
 				eventReceiver = thumbTR.gameObject.AddComponent<SimpleInputDragListener>();
 			else
 			{
-				if( dynamicJoystickMovementArea == null )
+				if( !dynamicJoystickMovementArea )
 				{
-					Transform canvasTransform = thumb.canvas.transform;
-					dynamicJoystickMovementArea = new GameObject( "Dynamic Joystick Movement Area", typeof( RectTransform ), typeof( Image ) ).GetComponent<RectTransform>();
-
-					dynamicJoystickMovementArea.SetParent( canvasTransform, false );
+					dynamicJoystickMovementArea = new GameObject( "Dynamic Joystick Movement Area", typeof( RectTransform ) ).GetComponent<RectTransform>();
+					dynamicJoystickMovementArea.SetParent( thumb.canvas.transform, false );
 					dynamicJoystickMovementArea.SetAsFirstSibling();
-
 					dynamicJoystickMovementArea.anchorMin = Vector2.zero;
 					dynamicJoystickMovementArea.anchorMax = Vector2.one;
 					dynamicJoystickMovementArea.sizeDelta = Vector2.zero;
 					dynamicJoystickMovementArea.anchoredPosition = Vector2.zero;
 				}
 
-				Image dynamicJoystickMovementAreaRaycastTarget = dynamicJoystickMovementArea.GetComponent<Image>();
-				if( dynamicJoystickMovementAreaRaycastTarget == null )
-					dynamicJoystickMovementAreaRaycastTarget = dynamicJoystickMovementArea.gameObject.AddComponent<Image>();
-
-				dynamicJoystickMovementAreaRaycastTarget.sprite = thumb.sprite;
-				dynamicJoystickMovementAreaRaycastTarget.color = Color.clear;
-				dynamicJoystickMovementAreaRaycastTarget.raycastTarget = true;
-
 				eventReceiver = dynamicJoystickMovementArea.gameObject.AddComponent<SimpleInputDragListener>();
 			}
 
@@ -184,7 +175,7 @@ private void OnUpdate()
 			c.a = opacity;
 			thumb.color = c;
 
-			if( background != null )
+			if( background )
 			{
 				c = background.color;
 				c.a = opacity;

Plugins/SimpleInput/Scripts/Core/NonDrawingGraphic.cs

@@ -0,0 +1,17 @@
+using UnityEngine.UI;
+
+namespace SimpleInputNamespace
+{
+	// Credit: http://answers.unity.com/answers/1157876/view.html
+	public class NonDrawingGraphic : Graphic
+	{
+		public override void SetMaterialDirty() { return; }
+		public override void SetVerticesDirty() { return; }
+
+		protected override void OnPopulateMesh( VertexHelper vh )
+		{
+			vh.Clear();
+			return;
+		}
+	}
+}

Plugins/SimpleInput/Scripts/Core/SimpleInputDragListener.cs

@@ -13,11 +13,8 @@ public class SimpleInputDragListener : MonoBehaviour, IPointerDownHandler, IDrag
 		private void Awake()
 		{
 			Graphic graphic = GetComponent<Graphic>();
-			if( graphic == null )
-			{
-				graphic = gameObject.AddComponent<Image>();
-				graphic.color = Color.clear;
-			}
+			if( !graphic )
+				graphic = gameObject.AddComponent<NonDrawingGraphic>();
 
 			graphic.raycastTarget = true;
 		}

Plugins/SimpleInput/Scripts/Core/SimpleInputMultiDragListener.cs

@@ -23,11 +23,8 @@ public class SimpleInputMultiDragListener : MonoBehaviour, IPointerDownHandler,
 		private void Awake()
 		{
 			Graphic graphic = GetComponent<Graphic>();
-			if( graphic == null )
-			{
-				graphic = gameObject.AddComponent<Image>();
-				graphic.color = Color.clear;
-			}
+			if( !graphic )
+				graphic = gameObject.AddComponent<NonDrawingGraphic>();
 
 			graphic.raycastTarget = true;
 		}

README.md

@@ -7,11 +7,11 @@
 
 **WebGL Demo:** http://yasirkula.net/SimpleInputDemo/
 
-## ABOUT
-
 SimpleInput is an improvement over Unity's standard **Input** system that allows you to use custom input providers like on-screen joysticks, UI buttons and d-pads. In other words, it lets you simulate e.g. Input.GetAxis when a button is pressed or a virtual joystick is dragged. It also supports using custom axes and buttons that don't necessarily exist in Edit-Project Settings-Input.
 
-To use the SimpleInput system, simply replace Input with **SimpleInput** in your scripts; i.e:
+## HOW TO
+
+First, import [SimpleInput.unitypackage](https://github.com/yasirkula/UnitySimpleInput/releases) to your project. To use the SimpleInput system, simply replace Input with **SimpleInput** in your scripts; i.e:
 
 - Input.GetAxis -> SimpleInput.GetAxis
 - Input.GetAxisRaw -> SimpleInput.GetAxisRaw
@@ -31,10 +31,6 @@ By default, SimpleInput receives input from Unity's Input system, as well. That'
 
 SimpleInput works almost identically to standard Input system; only the lerping of Input.GetAxis might differ slightly. Lerp modifier can be configured via `SimpleInput.AxisLerpModifier`.
 
-## UPGRADING FROM PREVIOUS VERSIONS
-
-If you are upgrading from a very old version of SimpleInput, values of axes, buttons, mouse buttons and keys in SimpleInput components might get reset after the upgrade. So, you should write down these values somewhere before upgrading the plugin.
-
 ## BUILT-IN INPUT COMPONENTS
 
 ### SimpleInput.GetAxis Inputs