투명디스플레이 연구사업

using UnityEngine;

using System;

/// <summary>

/// Script that emulates a 3D holographic display based on the viewer position

/// by Davi Loots (Twitter: @davloots), Start() & Update()-functions added by Rumen Filkov (Twitter: @roumenf)

/// Usage:

/// - Attach to a camera.

/// - Update the HeadPosition each frame either in this or in an external script based on some form of headtracking

/// - For best effect - and if available - use a stereoscopic display and calculate the head

///   position twice by simply offsetting the HeadPosition .03 to the left and to the right for

///   each of the views.

/// </summary>

class SimpleHolographicCamera : MonoBehaviour

{

	[Tooltip("Index of the player, tracked by this component. 0 means the 1st player, 1 - the 2nd one, 2 - the 3rd one, etc.")]

	public int playerIndex = 0;

	//[Tooltip("How high above the ground is the center of the display, in meters.")]

	//public float ScreenCenterY = 0.5f;

	[Tooltip("The position of display center, in Kinect world coordinates, in meters.")]

	public Vector3 screenCenterPos = new Vector3(0f, 1f, 0f);

	[Tooltip("Width of the display in meters.")]

	public float screenWidth = 1.6f; // 0.88f;

	[Tooltip("Height of the display in meters.")]

	public float screenHeight = 0.9f; // 0.50f;

	[Tooltip("Maximum distance from the user to the display wall, in meters.")]

	public float maxUserDistance = 3f;

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

	public GUIText statusText = null;

	private float left = -0.2F;

	private float right = 0.2F;

	private float bottom = -0.2F;

	private float top = 0.2F;

	private KinectManager kinectManager;

	private Vector3 jointHeadPos;

	private Vector3 headRelPosition;

	private bool headPosValid = false;

	private Vector3 initialCamPos = Vector3.zero;

	private Quaternion initialCamRot = Quaternion.identity;

	private Matrix4x4 initialCamPM = Matrix4x4.identity;

	private Vector3 initialRelPos = Vector3.zero;

	void Start()

	{

		kinectManager = KinectManager.Instance;

		//screenCenterPos = new Vector3 (0f, ScreenCenterY, 0f);

		Camera cam = GetComponent<Camera>();

		if (cam)

		{

			initialCamPos = cam.transform.position;

			initialCamRot = cam.transform.rotation;

			initialCamPM = cam.projectionMatrix;

		}

	}

	void Update()

	{

		headPosValid = false;

		if (kinectManager && kinectManager.IsInitialized())

		{

			long userId = kinectManager.GetUserIdByIndex(playerIndex);

			if (kinectManager.IsUserTracked (userId) && kinectManager.IsJointTracked (userId, (int)KinectInterop.JointType.Head))

			{

				jointHeadPos = kinectManager.GetJointPosition (userId, (int)KinectInterop.JointType.Head);

				headRelPosition = jointHeadPos - screenCenterPos;

				headPosValid = true;

				if (initialRelPos == Vector3.zero)

				{

					initialRelPos = headRelPosition;

				}

				if (statusText)

				{

					string sStatusMsg = string.Format ("Head position: {0}\nRelative to screen: {1}", jointHeadPos, headRelPosition);

					statusText.text = sStatusMsg;

				}

			}

			else

			{

				initialRelPos = Vector3.zero;

			}

		}

	}

    /// <summary>

    /// Updates the projection matrix and camera position to get the correct anamorph perspective

    /// </summary>

    void LateUpdate()

    {

		Camera cam = GetComponent<Camera>();

		if (cam)

		{

			if (headPosValid)

			{

				// set off-center projection

				left = cam.nearClipPlane * (-screenWidth / 2 - headRelPosition.x) / initialRelPos.z;

				right = cam.nearClipPlane * (screenWidth / 2 - headRelPosition.x) / initialRelPos.z;

				bottom = cam.nearClipPlane * (-screenHeight / 2 - headRelPosition.y) / initialRelPos.z;

				top = cam.nearClipPlane * (screenHeight / 2 - headRelPosition.y) / initialRelPos.z;

				cam.transform.position = new Vector3(headRelPosition.x, headRelPosition.y, -headRelPosition.z);

				cam.transform.LookAt(new Vector3(headRelPosition.x, headRelPosition.y, 0));

				Matrix4x4 m = PerspectiveOffCenter(left, right, bottom, top, cam.nearClipPlane, cam.farClipPlane);

				cam.projectionMatrix = m;

			}

			else

			{

				// set the initial camera settings

				cam.transform.position = initialCamPos;

				cam.transform.rotation = initialCamRot;

				cam.projectionMatrix = initialCamPM;

			}

		}

    }

    /// <summary>

    /// Calculates the camera projection matrix

    /// </summary>

    /// <returns>The off center matrix.</returns>

    /// <param name="left">Left.</param>

    /// <param name="right">Right.</param>

    /// <param name="bottom">Bottom.</param>

    /// <param name="top">Top.</param>

    /// <param name="near">Near.</param>

    /// <param name="far">Far.</param>

    private Matrix4x4 PerspectiveOffCenter(float left, float right, float bottom, float top, float near, float far)

    {

        float x = 2.0F * near / (right - left);

        float y = 2.0F * near / (top - bottom);

        float a = (right + left) / (right - left);

        float b = (top + bottom) / (top - bottom);

        float c = -(far + near) / (far - near);

        float d = -(2.0F * far * near) / (far - near);

        float e = -1.0F;

        Matrix4x4 m = new Matrix4x4();

        m[0, 0] = x;

        m[0, 1] = 0;

        m[0, 2] = a;

        m[0, 3] = 0;

        m[1, 0] = 0;

        m[1, 1] = y;

        m[1, 2] = b;

        m[1, 3] = 0;

        m[2, 0] = 0;

        m[2, 1] = 0;

        m[2, 2] = c;

        m[2, 3] = d;

        m[3, 0] = 0;

        m[3, 1] = 0;

        m[3, 2] = e;

        m[3, 3] = 0;

        return m;

    }

}