투명디스플레이 연구사업

using UnityEngine;

using System.Collections;

public class GrabDropScript : MonoBehaviour, InteractionListenerInterface

{

	[Tooltip("List of the objects that may be dragged and dropped.")]

	public GameObject[] draggableObjects;

	[Tooltip("Material used to outline the currently selected object.")]

	public Material selectedObjectMaterial;

	[Tooltip("Drag speed of the selected object.")]

	public float dragSpeed = 3.0f;

	[Tooltip("Minimum Z-position of the dragged object, when moving forward and back.")]

	public float minZ = 0f;

	[Tooltip("Maximum Z-position of the dragged object, when moving forward and back.")]

	public float maxZ = 5f;

	// public options (used by the Options GUI)

	[Tooltip("Whether the objects obey gravity when released or not. Used by the Options GUI-window.")]

	public bool useGravity = true;

	[Tooltip("Whether the objects should be put in their original positions. Used by the Options GUI-window.")]

	public bool resetObjects = false;

	[Tooltip("Camera used for screen ray-casting. This is usually the main camera.")]

	public Camera screenCamera;

	[Tooltip("GUI-Text used to display information messages.")]

	public GUIText infoGuiText;

	[Tooltip("Interaction manager instance, used to detect hand interactions. If left empty, it will be the first interaction manager found in the scene.")]

	public InteractionManager interactionManager;

	// hand interaction variables

	//private bool isLeftHandDrag = false;

	private InteractionManager.HandEventType lastHandEvent = InteractionManager.HandEventType.None;

	// currently dragged object and its parameters

	private GameObject draggedObject;

	//private float draggedObjectDepth;

	private Vector3 draggedObjectOffset;

	private Material draggedObjectMaterial;

	private float draggedNormalZ;

	// initial objects' positions and rotations (used for resetting objects)

	private Vector3[] initialObjPos;

	private Quaternion[] initialObjRot;

	// normalized and pixel position of the cursor

	private Vector3 screenNormalPos = Vector3.zero;

	private Vector3 screenPixelPos = Vector3.zero;

	private Vector3 newObjectPos = Vector3.zero;

	// choose whether to use gravity or not

	public void SetUseGravity(bool bUseGravity)

	{

		this.useGravity = bUseGravity;

	}

	// request resetting of the draggable objects

	public void RequestObjectReset()

	{

		resetObjects = true;

	}

	void Start()

	{

		// by default set the main-camera to be screen-camera

		if (screenCamera == null) 

		{

			screenCamera = Camera.main;

		}

		// save the initial positions and rotations of the objects

		initialObjPos = new Vector3[draggableObjects.Length];

		initialObjRot = new Quaternion[draggableObjects.Length];

		for(int i = 0; i < draggableObjects.Length; i++)

		{

			initialObjPos[i] = screenCamera ? screenCamera.transform.InverseTransformPoint(draggableObjects[i].transform.position) : draggableObjects[i].transform.position;

			initialObjRot[i] = screenCamera ? Quaternion.Inverse(screenCamera.transform.rotation) * draggableObjects[i].transform.rotation : draggableObjects[i].transform.rotation;

		}

		// get the interaction manager instance

		if(interactionManager == null)

		{

			interactionManager = InteractionManager.Instance;

		}

	}

	void Update() 

	{

		if(interactionManager != null && interactionManager.IsInteractionInited())

		{

			if(resetObjects && draggedObject == null)

			{

				// reset the objects as needed

				resetObjects = false;

				ResetObjects ();

			}

			if(draggedObject == null)

			{

				// check if there is an underlying object to be selected

				if(lastHandEvent == InteractionManager.HandEventType.Grip && screenNormalPos != Vector3.zero)

				{

					// convert the normalized screen pos to pixel pos

					screenNormalPos = interactionManager.IsLeftHandPrimary() ? interactionManager.GetLeftHandScreenPos() : interactionManager.GetRightHandScreenPos();

					screenPixelPos.x = (int)(screenNormalPos.x * (screenCamera ? screenCamera.pixelWidth : Screen.width));

					screenPixelPos.y = (int)(screenNormalPos.y * (screenCamera ? screenCamera.pixelHeight : Screen.height));

					Ray ray = screenCamera ? screenCamera.ScreenPointToRay(screenPixelPos) : new Ray();

					// check if there is an underlying objects

					RaycastHit hit;

					if(Physics.Raycast(ray, out hit))

					{

						foreach(GameObject obj in draggableObjects)

						{

							if(hit.collider.gameObject == obj)

							{

								// an object was hit by the ray. select it and start drgging

								draggedObject = obj;

								draggedObjectOffset = hit.point - draggedObject.transform.position;

								draggedObjectOffset.z = 0; // don't change z-pos

								draggedNormalZ = (minZ + screenNormalPos.z * (maxZ - minZ)) - 

									draggedObject.transform.position.z; // start from the initial hand-z

								// set selection material

								draggedObjectMaterial = draggedObject.GetComponent<Renderer>().material;

								draggedObject.GetComponent<Renderer>().material = selectedObjectMaterial;

								// stop using gravity while dragging object

								draggedObject.GetComponent<Rigidbody>().useGravity = false;

								break;

							}

						}

					}

				}

			}

			else

			{

				// continue dragging the object

				screenNormalPos = interactionManager.IsLeftHandPrimary() ? interactionManager.GetLeftHandScreenPos() : interactionManager.GetRightHandScreenPos();

				// convert the normalized screen pos to 3D-world pos

				screenPixelPos.x = (int)(screenNormalPos.x * (screenCamera ? screenCamera.pixelWidth : Screen.width));

				screenPixelPos.y = (int)(screenNormalPos.y * (screenCamera ? screenCamera.pixelHeight : Screen.height));

				//screenPixelPos.z = screenNormalPos.z + draggedObjectDepth;

				screenPixelPos.z = (minZ + screenNormalPos.z * (maxZ - minZ)) - draggedNormalZ -

					(screenCamera ? screenCamera.transform.position.z : 0f);

				newObjectPos = screenCamera.ScreenToWorldPoint(screenPixelPos) - draggedObjectOffset;

				draggedObject.transform.position = Vector3.Lerp(draggedObject.transform.position, newObjectPos, dragSpeed * Time.deltaTime);

				// check if the object (hand grip) was released

				bool isReleased = lastHandEvent == InteractionManager.HandEventType.Release;

				if(isReleased)

				{

					// restore the object's material and stop dragging the object

					draggedObject.GetComponent<Renderer>().material = draggedObjectMaterial;

					if(useGravity)

					{

						// add gravity to the object

						draggedObject.GetComponent<Rigidbody>().useGravity = true;

					}

					draggedObject = null;

				}

			}

		}

	}

	void OnGUI()

	{

		if(infoGuiText != null && interactionManager != null && interactionManager.IsInteractionInited())

		{

			string sInfo = string.Empty;

			long userID = interactionManager.GetUserID();

			if(userID != 0)

			{

				if(draggedObject != null)

					sInfo = "Dragging the " + draggedObject.name + " around.";

				else

					sInfo = "Please grab and drag an object around.";

			}

			else

			{

				KinectManager kinectManager = KinectManager.Instance;

				if(kinectManager && kinectManager.IsInitialized())

				{

					sInfo = "Waiting for Users...";

				}

				else

				{

					sInfo = "Kinect is not initialized. Check the log for details.";

				}

			}

			infoGuiText.text = sInfo;

		}

	}

	// reset positions and rotations of the objects

	private void ResetObjects()

	{

		for(int i = 0; i < draggableObjects.Length; i++)

		{

			draggableObjects[i].GetComponent<Rigidbody>().useGravity = false;

			draggableObjects[i].GetComponent<Rigidbody>().velocity = Vector3.zero;

			draggableObjects[i].transform.position = screenCamera ? screenCamera.transform.TransformPoint(initialObjPos[i]) : initialObjPos[i];

			draggableObjects[i].transform.rotation = screenCamera ? screenCamera.transform.rotation * initialObjRot[i] : initialObjRot[i];

		}

	}

	public void HandGripDetected(long userId, int userIndex, bool isRightHand, bool isHandInteracting, Vector3 handScreenPos)

	{

		if (!isHandInteracting || !interactionManager)

			return;

		if (userId != interactionManager.GetUserID())

			return;

		lastHandEvent = InteractionManager.HandEventType.Grip;

		//isLeftHandDrag = !isRightHand;

		screenNormalPos = handScreenPos;

	}

	public void HandReleaseDetected(long userId, int userIndex, bool isRightHand, bool isHandInteracting, Vector3 handScreenPos)

	{

		if (!isHandInteracting || !interactionManager)

			return;

		if (userId != interactionManager.GetUserID())

			return;

		lastHandEvent = InteractionManager.HandEventType.Release;

		//isLeftHandDrag = !isRightHand;

		screenNormalPos = handScreenPos;

	}

	public bool HandClickDetected(long userId, int userIndex, bool isRightHand, Vector3 handScreenPos)

	{

		return true;

	}

}