Adding TapToPlace

Assets/HoloToolkit/SpatialMapping/Scripts/TapToPlace.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+
+using UnityEngine;
+
+namespace HoloToolkit.Unity
+{
+    /// <summary>
+    /// The TapToPlace class is a basic way to enable users to move objects 
+    /// and place them on real world surfaces.
+    /// Put this script on the object you want to be able to move. 
+    /// Users will be able to select objects, gaze elsewhere, and perform the
+    /// select gesture again to place.
+    /// This script is used in conjunction with GazeManager, GestureManager,
+    /// and SpatialMappingManager.
+    /// </summary>
+
+    public partial class TapToPlace : MonoBehaviour
+    {
+        bool placing = false;
+
+        // Called by GazeGestureManager when the user performs a Select gesture.
+        void OnSelect()
+        {
+            // On each Select gesture, toggle whether the user is in placing mode.
+            placing = !placing;
+
+            // If the user is in placing mode, display the spatial mapping mesh.
+            if (placing)
+            {
+                SpatialMappingManager.Instance.DrawVisualMeshes = true;
+            }
+            // If the user is not in placing mode, hide the spatial mapping mesh.
+            else
+            {
+                SpatialMappingManager.Instance.DrawVisualMeshes = false;
+            }
+        }
+
+        // Update is called once per frame.
+        void Update()
+        {
+            // If the user is in placing mode,
+            // update the placement to match the user's gaze.
+            if (placing)
+            {
+                // Do a raycast into the world that will only hit the Spatial Mapping mesh.
+                var headPosition = Camera.main.transform.position;
+                var gazeDirection = Camera.main.transform.forward;
+
+                RaycastHit hitInfo;
+                if (Physics.Raycast(headPosition, gazeDirection, out hitInfo,
+                    30.0f, SpatialMappingManager.Instance.LayerMask))
+                {
+                    // Move this object to where the raycast
+                    // hit the Spatial Mapping mesh.
+                    // Here is where you might consider adding intelligence
+                    // to how the object is placed.  For example, consider
+                    // placing based on the bottom of the object's
+                    // collider so it sits properly on surfaces.
+                    this.transform.position = hitInfo.point;
+
+                    // Rotate this object to face the user.
+                    Quaternion toQuat = Camera.main.transform.localRotation;
+                    toQuat.x = 0;
+                    toQuat.z = 0;
+                    this.transform.rotation = toQuat;
+                }
+            }
+        }
+    }
+}