Merge pull request #2 from timm/scale

Add a sample demonstrating scale

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Assets/Scripts/MakeAppearOnPlane.cs

+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Experimental.XR;
+using UnityEngine.XR.ARFoundation;
+
+/// <summary>
+/// Moves the ARSessionOrigin in such a way that it makes the given content appear to be
+/// at a given location acquired via a raycast.
+/// </summary>
+[RequireComponent(typeof(ARSessionOrigin))]
+public class MakeAppearOnPlane : MonoBehaviour
+{
+    [SerializeField]
+    [Tooltip("A transform which should be made to appear to be at the touch point.")]
+    Transform m_Content;
+
+    /// <summary>
+    /// A transform which should be made to appear to be at the touch point.
+    /// </summary>
+    public Transform content
+    {
+        get { return m_Content; }
+        set { m_Content = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("The rotation the content should appear to have.")]
+    Quaternion m_Rotation;
+
+    /// <summary>
+    /// The rotation the content should appear to have.
+    /// </summary>
+    public Quaternion rotation
+    {
+        get { return m_Rotation; }
+        set
+        {
+            m_Rotation = value;
+            if (m_SessionOrigin != null)
+                m_SessionOrigin.MakeContentAppearAt(content, content.transform.position, m_Rotation);
+        }
+    }
+
+    void Awake()
+    {
+        m_SessionOrigin = GetComponent<ARSessionOrigin>();
+    }
+
+    void Update()
+    {
+        if (Input.touchCount == 0 || m_Content == null)
+            return;
+
+        var touch = Input.GetTouch(0);
+
+        if (m_SessionOrigin.Raycast(touch.position, s_Hits, TrackableType.PlaneWithinPolygon))
+        {
+            // Raycast hits are sorted by distance, so the first one
+            // will be the closest hit.
+            var hitPose = s_Hits[0].pose;
+
+            // This does not move the content; instead, it moves and orients the ARSessionOrigin
+            // such that the content appears to be at the raycast hit position.
+            m_SessionOrigin.MakeContentAppearAt(content, hitPose.position, m_Rotation);
+        }
+    }
+
+    static List<ARRaycastHit> s_Hits = new List<ARRaycastHit>();
+
+    ARSessionOrigin m_SessionOrigin;
+}

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Assets/Scripts/RotationController.cs

+using UnityEngine;
+using UnityEngine.UI;
+
+/// <summary>
+/// Controls the orientation of content place by the <see cref="MakeAppearOnPlane"/>
+/// component using a UI.Slider to affect the rotation about the Y axis.
+/// </summary>
+[RequireComponent(typeof(MakeAppearOnPlane))]
+public class RotationController : MonoBehaviour
+{
+    MakeAppearOnPlane m_MakeAppearOnPlane;
+
+    [SerializeField]
+    [Tooltip("The slider used to control rotation.")]
+    Slider m_Slider;
+
+    /// <summary>
+    /// The slider used to control scale.
+    /// </summary>
+    public Slider slider
+    {
+        get { return m_Slider; }
+        set { m_Slider = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("The text used to display the current rotation on the screen.")]
+    Text m_Text;
+
+    /// <summary>
+    /// The text used to display the current rotation on the screen.
+    /// </summary>
+    public Text text
+    {
+        get { return m_Text; }
+        set { m_Text = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("Minimum rotation angle in degrees.")]
+    public float m_Min = 0f;
+
+    /// <summary>
+    /// Minimum angle in degrees.
+    /// </summary>
+    public float min
+    {
+        get { return m_Min; }
+        set { m_Min = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("Maximum angle in degrees.")]
+    public float m_Max = 360f;
+
+    /// <summary>
+    /// Maximum angle in degrees.
+    /// </summary>
+    public float max
+    {
+        get { return m_Max; }
+        set { m_Max = value; }
+    }
+
+    /// <summary>
+    /// Invoked when the slider's value changes
+    /// </summary>
+    public void OnSliderValueChanged()
+    {
+        if (slider != null)
+            angle = slider.value * (max - min) + min;
+    }
+
+    float angle
+    {
+        get
+        {
+            return m_MakeAppearOnPlane.rotation.eulerAngles.y;
+        }
+        set
+        {
+            m_MakeAppearOnPlane.rotation = Quaternion.AngleAxis(value, Vector3.up);
+            UpdateText();
+        }
+    }
+
+    void Awake()
+    {
+        m_MakeAppearOnPlane = GetComponent<MakeAppearOnPlane>();
+    }
+
+    void OnEnable()
+    {
+        if (slider != null)
+            slider.value = (angle - min) / (max - min);
+        UpdateText();
+    }
+
+    void UpdateText()
+    {
+        if (m_Text != null)
+            m_Text.text = "Rotation: " + angle + " degrees";
+    }
+}

Assets/Scripts/RotationController.cs.meta

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Assets/Scripts/ScaleController.cs

+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.XR.ARFoundation;
+
+/// <summary>
+/// Sets the scale of the ARSessionOrigin according to the value of a UI.Slider.
+/// </summary>
+[RequireComponent(typeof(ARSessionOrigin))]
+public class ScaleController : MonoBehaviour
+{
+    [SerializeField]
+    [Tooltip("The slider used to control the scale factor.")]
+    Slider m_Slider;
+
+    /// <summary>
+    /// The slider used to control the scale factor.
+    /// </summary>
+    public Slider slider
+    {
+        get { return m_Slider; }
+        set { m_Slider = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("The text used to display the current scale factor on the screen.")]
+    Text m_Text;
+
+    /// <summary>
+    /// The text used to display the current scale factor on the screen.
+    /// </summary>
+    public Text text
+    {
+        get { return m_Text; }
+        set { m_Text = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("Minimum scale factor.")]
+    public float m_Min = .1f;
+
+    /// <summary>
+    /// Minimum scale factor.
+    /// </summary>
+    public float min
+    {
+        get { return m_Min; }
+        set { m_Min = value; }
+    }
+
+    [SerializeField]
+    [Tooltip("Maximum scale factor.")]
+    public float m_Max = 10f;
+
+    /// <summary>
+    /// Maximum scale factor.
+    /// </summary>
+    public float max
+    {
+        get { return m_Max; }
+        set { m_Max = value; }
+    }
+
+    /// <summary>
+    /// Invoked whenever the slider's value changes
+    /// </summary>
+    public void OnSliderValueChanged()
+    {
+        if (slider != null)
+            scale = slider.value * (max - min) + min;
+    }
+
+    float scale
+    {
+        get
+        {
+            return m_SessionOrigin.transform.localScale.x;
+        }
+        set
+        {
+            m_SessionOrigin.transform.localScale = Vector3.one * value;
+            UpdateText();
+        }
+    }
+
+    void Awake()
+    {
+        m_SessionOrigin = GetComponent<ARSessionOrigin>();
+    }
+
+    void OnEnable()
+    {
+        if (slider != null)
+            slider.value = (scale - min) / (max - min);
+        UpdateText();
+    }
+
+    void UpdateText()
+    {
+        if (text != null)
+            text.text = "Scale: " + scale;
+    }
+
+    ARSessionOrigin m_SessionOrigin;
+}

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