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Assets/VRTemplateAssets/Scripts/XRPokeFollowAffordanceFill.cs
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244
Assets/VRTemplateAssets/Scripts/XRPokeFollowAffordanceFill.cs
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using Unity.Mathematics;
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using Unity.XR.CoreUtils.Bindings;
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using UnityEngine;
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using UnityEngine.XR.Interaction.Toolkit.AffordanceSystem.State;
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using UnityEngine.XR.Interaction.Toolkit.Filtering;
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using UnityEngine.XR.Interaction.Toolkit.Utilities.Tweenables.Primitives;
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namespace Unity.VRTemplate
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{
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/// <summary>
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/// Follow animation affordance for <see cref="IPokeStateDataProvider"/>, such as <see cref="XRPokeFilter"/>.
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/// Used to animate a pressed transform, such as a button to follow the poke position.
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/// </summary>
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[AddComponentMenu("XR/XR Poke Follow Affordance Fill", 22)]
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public class XRPokeFollowAffordanceFill : MonoBehaviour
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{
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[SerializeField]
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[Tooltip("Transform that will move in the poke direction when this or a parent GameObject is poked." +
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"\nNote: Should be a direct child GameObject.")]
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Transform m_PokeFollowTransform;
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[SerializeField]
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[Tooltip("Transform that will scale the mask when this interactable is poked.")]
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RectTransform m_PokeFill;
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[SerializeField]
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[Tooltip("The max width size for the poke fill image when pressed")]
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float m_PokeFillMaxSizeX;
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[SerializeField]
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[Tooltip("The max height size for the poke fill image when pressed")]
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float m_PokeFillMaxSizeY;
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/// <summary>
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/// Transform that will animate along the axis of interaction when this interactable is poked.
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/// Note: Must be a direct child GameObject as it moves in local space relative to the poke target's transform.
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/// </summary>
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public Transform pokeFollowTransform
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{
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get => m_PokeFollowTransform;
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set => m_PokeFollowTransform = value;
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}
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[SerializeField]
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[Range(0f, 20f)]
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[Tooltip("Multiplies transform position interpolation as a factor of Time.deltaTime. If 0, no smoothing will be applied.")]
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float m_SmoothingSpeed = 8f;
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/// <summary>
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/// Multiplies transform position interpolation as a factor of <see cref="Time.deltaTime"/>. If <c>0</c>, no smoothing will be applied.
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/// </summary>
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public float smoothingSpeed
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{
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get => m_SmoothingSpeed;
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set => m_SmoothingSpeed = value;
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}
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[SerializeField]
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[Tooltip("When this component is no longer the target of the poke, the Poke Follow Transform returns to the original position.")]
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bool m_ReturnToInitialPosition = true;
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/// <summary>
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/// When this component is no longer the target of the poke, the <see cref="pokeFollowTransform"/> returns to the original position.
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/// </summary>
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public bool returnToInitialPosition
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{
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get => m_ReturnToInitialPosition;
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set => m_ReturnToInitialPosition = value;
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}
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[SerializeField]
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[Tooltip("Whether to apply the follow animation if the target of the poke is a child of this transform. " +
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"This is useful for UI objects that may have child graphics.")]
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bool m_ApplyIfChildIsTarget = true;
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/// <summary>
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/// Whether to apply the follow animation if the target of the poke is a child of this transform.
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/// This is useful for UI objects that may have child graphics.
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/// </summary>
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public bool applyIfChildIsTarget
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{
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get => m_ApplyIfChildIsTarget;
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set => m_ApplyIfChildIsTarget = value;
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}
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[Header("Distance Clamping")]
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[SerializeField]
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[Tooltip("Whether to keep the Poke Follow Transform from moving past a minimum distance from the poke target.")]
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bool m_ClampToMinDistance;
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/// <summary>
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/// Whether to keep the <see cref="pokeFollowTransform"/> from moving past <see cref="minDistance"/> from the poke target.
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/// </summary>
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public bool clampToMinDistance
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{
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get => m_ClampToMinDistance;
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set => m_ClampToMinDistance = value;
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}
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[SerializeField]
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[Tooltip("The minimum distance from this transform that the Poke Follow Transform can move.")]
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float m_MinDistance;
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/// <summary>
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/// The minimum distance from this transform that the <see cref="pokeFollowTransform"/> can move when
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/// <see cref="clampToMinDistance"/> is <see langword="true"/>.
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/// </summary>
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public float minDistance
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{
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get => m_MinDistance;
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set => m_MinDistance = value;
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}
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[Space]
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[SerializeField]
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[Tooltip("Whether to keep the Poke Follow Transform from moving past a maximum distance from the poke target.")]
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bool m_ClampToMaxDistance;
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/// <summary>
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/// Whether to keep the <see cref="pokeFollowTransform"/> from moving past <see cref="maxDistance"/> from the poke target.
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/// </summary>
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public bool clampToMaxDistance
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{
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get => m_ClampToMaxDistance;
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set => m_ClampToMaxDistance = value;
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}
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[SerializeField]
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[Tooltip("The maximum distance from this transform that the Poke Follow Transform can move. Will shrink to the distance of initial position if that is smaller, or if this is 0.")]
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float m_MaxDistance;
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/// <summary>
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/// The maximum distance from this transform that the <see cref="pokeFollowTransform"/> can move when
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/// <see cref="clampToMaxDistance"/> is <see langword="true"/>.
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/// </summary>
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public float maxDistance
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{
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get => m_MaxDistance;
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set => m_MaxDistance = value;
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}
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IPokeStateDataProvider m_PokeDataProvider;
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readonly Vector3TweenableVariable m_TransformTweenableVariable = new Vector3TweenableVariable();
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readonly FloatTweenableVariable m_PokeStrengthTweenableVariable = new FloatTweenableVariable();
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readonly BindingsGroup m_BindingsGroup = new BindingsGroup();
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Vector3 m_InitialPosition;
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bool m_IsFirstFrame;
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/// <summary>
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/// See <see cref="MonoBehaviour"/>.
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/// </summary>
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protected void Awake()
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{
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m_PokeDataProvider = GetComponentInParent<IPokeStateDataProvider>();
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}
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/// <summary>
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/// See <see cref="MonoBehaviour"/>.
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/// </summary>
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protected void Start()
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{
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if (m_PokeFollowTransform != null)
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{
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m_InitialPosition = m_PokeFollowTransform.localPosition;
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m_MaxDistance = m_MaxDistance > 0f ? Mathf.Min(m_InitialPosition.magnitude, m_MaxDistance) : m_InitialPosition.magnitude;
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m_BindingsGroup.AddBinding(m_TransformTweenableVariable.Subscribe(OnTransformTweenableVariableUpdated));
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m_BindingsGroup.AddBinding(m_PokeStrengthTweenableVariable.Subscribe(OnPokeStrengthChanged));
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m_BindingsGroup.AddBinding(m_PokeDataProvider.pokeStateData.SubscribeAndUpdate(OnPokeStateDataUpdated));
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}
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else
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{
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enabled = false;
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Debug.LogWarning($"Missing Poke Follow Transform assignment on {this}. Disabling component.", this);
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}
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}
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/// <summary>
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/// See <see cref="MonoBehaviour"/>.
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/// </summary>
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protected void OnDestroy()
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{
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m_BindingsGroup.Clear();
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m_TransformTweenableVariable?.Dispose();
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}
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/// <summary>
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/// See <see cref="MonoBehaviour"/>.
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/// </summary>
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protected void LateUpdate()
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{
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if (m_IsFirstFrame)
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{
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m_TransformTweenableVariable.HandleTween(1f);
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m_PokeStrengthTweenableVariable.target = 0f;
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m_PokeStrengthTweenableVariable.HandleTween(1f);
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m_IsFirstFrame = false;
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return;
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}
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float tweenAmt = m_SmoothingSpeed > 0f ? Time.deltaTime * m_SmoothingSpeed : 1f;
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m_TransformTweenableVariable.HandleTween(tweenAmt);
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m_PokeStrengthTweenableVariable.HandleTween(tweenAmt);
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}
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void OnTransformTweenableVariableUpdated(float3 position)
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{
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m_PokeFollowTransform.localPosition = position;
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}
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void OnPokeStrengthChanged(float newStrength)
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{
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var newX = m_PokeFillMaxSizeX * newStrength;
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var newY = m_PokeFillMaxSizeY * newStrength;
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m_PokeFill.sizeDelta = new Vector2(newX, newY);
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}
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void OnPokeStateDataUpdated(PokeStateData data)
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{
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var pokeTarget = data.target;
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var applyFollow = m_ApplyIfChildIsTarget
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? pokeTarget != null && pokeTarget.IsChildOf(transform)
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: pokeTarget == transform;
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if (applyFollow)
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{
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var targetPosition = pokeTarget.InverseTransformPoint(data.axisAlignedPokeInteractionPoint);
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if (m_ClampToMinDistance && targetPosition.sqrMagnitude < m_MinDistance * m_MinDistance)
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targetPosition = Vector3.ClampMagnitude(targetPosition, m_MinDistance);
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if (m_ClampToMaxDistance && targetPosition.sqrMagnitude > m_MaxDistance * m_MaxDistance)
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targetPosition = Vector3.ClampMagnitude(targetPosition, m_MaxDistance);
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m_TransformTweenableVariable.target = targetPosition;
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m_PokeStrengthTweenableVariable.target = Mathf.Clamp01(data.interactionStrength);
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}
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else if (m_ReturnToInitialPosition)
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{
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m_TransformTweenableVariable.target = m_InitialPosition;
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m_PokeStrengthTweenableVariable.target = 0f;
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}
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}
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}
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}
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