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Assets/SteamVR/InteractionSystem/Samples/Scripts/InteractableExample.cs

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+//======= Copyright (c) Valve Corporation, All rights reserved. ===============
+//
+// Purpose: Demonstrates how to create a simple interactable object
+//
+//=============================================================================
+
+using UnityEngine;
+using System.Collections;
+
+namespace Valve.VR.InteractionSystem
+{
+	//-------------------------------------------------------------------------
+	[RequireComponent( typeof( Interactable ) )]
+	public class InteractableExample : MonoBehaviour
+	{
+		private TextMesh textMesh;
+		private Vector3 oldPosition;
+		private Quaternion oldRotation;
+
+		private float attachTime;
+
+		private Hand.AttachmentFlags attachmentFlags = Hand.defaultAttachmentFlags & ( ~Hand.AttachmentFlags.SnapOnAttach ) & ( ~Hand.AttachmentFlags.DetachOthers );
+
+		//-------------------------------------------------
+		void Awake()
+		{
+			textMesh = GetComponentInChildren<TextMesh>();
+			textMesh.text = "No Hand Hovering";
+		}
+
+
+		//-------------------------------------------------
+		// Called when a Hand starts hovering over this object
+		//-------------------------------------------------
+		private void OnHandHoverBegin( Hand hand )
+		{
+			textMesh.text = "Hovering hand: " + hand.name;
+		}
+
+
+		//-------------------------------------------------
+		// Called when a Hand stops hovering over this object
+		//-------------------------------------------------
+		private void OnHandHoverEnd( Hand hand )
+		{
+			textMesh.text = "No Hand Hovering";
+		}
+
+
+		//-------------------------------------------------
+		// Called every Update() while a Hand is hovering over this object
+		//-------------------------------------------------
+		private void HandHoverUpdate( Hand hand )
+		{
+			if ( hand.GetStandardInteractionButtonDown() || ( ( hand.controller != null ) && hand.controller.GetPressDown( Valve.VR.EVRButtonId.k_EButton_Grip ) ) )
+			{
+				if ( hand.currentAttachedObject != gameObject )
+				{
+					// Save our position/rotation so that we can restore it when we detach
+					oldPosition = transform.position;
+					oldRotation = transform.rotation;
+
+					// Call this to continue receiving HandHoverUpdate messages,
+					// and prevent the hand from hovering over anything else
+					hand.HoverLock( GetComponent<Interactable>() );
+
+					// Attach this object to the hand
+					hand.AttachObject( gameObject, attachmentFlags );
+				}
+				else
+				{
+					// Detach this object from the hand
+					hand.DetachObject( gameObject );
+
+					// Call this to undo HoverLock
+					hand.HoverUnlock( GetComponent<Interactable>() );
+
+					// Restore position/rotation
+					transform.position = oldPosition;
+					transform.rotation = oldRotation;
+				}
+			}
+		}
+
+
+		//-------------------------------------------------
+		// Called when this GameObject becomes attached to the hand
+		//-------------------------------------------------
+		private void OnAttachedToHand( Hand hand )
+		{
+			textMesh.text = "Attached to hand: " + hand.name;
+			attachTime = Time.time;
+		}
+
+
+		//-------------------------------------------------
+		// Called when this GameObject is detached from the hand
+		//-------------------------------------------------
+		private void OnDetachedFromHand( Hand hand )
+		{
+			textMesh.text = "Detached from hand: " + hand.name;
+		}
+
+
+		//-------------------------------------------------
+		// Called every Update() while this GameObject is attached to the hand
+		//-------------------------------------------------
+		private void HandAttachedUpdate( Hand hand )
+		{
+			textMesh.text = "Attached to hand: " + hand.name + "\nAttached time: " + ( Time.time - attachTime ).ToString( "F2" );
+		}
+
+
+		//-------------------------------------------------
+		// Called when this attached GameObject becomes the primary attached object
+		//-------------------------------------------------
+		private void OnHandFocusAcquired( Hand hand )
+		{
+		}
+
+
+		//-------------------------------------------------
+		// Called when another attached GameObject becomes the primary attached object
+		//-------------------------------------------------
+		private void OnHandFocusLost( Hand hand )
+		{
+		}
+	}
+}