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using System;
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using Cthangover.Core.Mods;
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using Cthangover.Core.Mods.Resolvers;
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using Cthangover.Core.Characters;
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using Cthangover.Core.UI;
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using Godot;
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namespace Cthangover.FFBattle.UI
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{
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/// <summary>
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/// Visual representation of a single character (player or enemy) in the FF battle UI.
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/// Composite widget containing a sprite, HP bar, name label, and selection overlay.
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/// Supports highlight, flash, shake, and dissolve-death animations via Godot tweens.
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/// Created per-character by <see cref="FFPlayerPanel.Init"/> and
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/// <see cref="FFEnemyPanel.Init"/>. Clickable via <c>GuiInput</c> events;
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/// embedding panels wire these to <see cref="FFBattleCore"/> for action flow.
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/// </summary>
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public partial class FFCharacterWidget : ModWidget
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{
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private TextureRect _sprite;
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private TextureRect _selection;
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private Label _nameLabel;
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private ColorRect _hpBg;
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private ColorRect _hpFill;
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private Tween _animTween;
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private static Texture2D _cachedSelectTex;
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private static bool _selectTexLoaded;
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private static Shader _dissolveShader;
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/// <summary>Whether this widget belongs to the player party (affects highlight/targeting logic).</summary>
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public bool IsPlayer { get; set; }
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/// <summary>Whether the character is dead; set by <see cref="PlayDeathAnimation"/>.</summary>
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public bool IsDead { get; set; }
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/// <summary>The character data model backing this widget: stats, actions, status effects.</summary>
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public Character Card { get; set; }
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/// <summary>Original scale captured at construction; used to restore after death animation.</summary>
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public Vector2 BaseScale { get; private set; }
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/// <summary>Exposes this widget as a <see cref="Godot.Control"/> for layout calculations.</summary>
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public Control ControlNode => this;
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protected override void Construct()
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{
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_sprite = GetNode<TextureRect>("Sprite");
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_hpBg = GetNode<ColorRect>("HpBg");
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_hpFill = GetNode<ColorRect>("HpFill");
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_nameLabel = GetNode<Label>("NameLabel");
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_selection = GetNode<TextureRect>("Selection");
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Size = CustomMinimumSize;
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if (!_selectTexLoaded)
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{
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_cachedSelectTex = Textures.Resolve("select");
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_selectTexLoaded = true;
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}
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if (_cachedSelectTex != null)
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{
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_selection.Texture = _cachedSelectTex;
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_selection.ExpandMode = TextureRect.ExpandModeEnum.IgnoreSize;
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_selection.StretchMode = TextureRect.StretchModeEnum.Scale;
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_selection.Modulate = new Color(0, 0, 0, 0);
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}
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}
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/// <summary>
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/// Binds this widget to a <see cref="Character"/> model. Sets the sprite from
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/// <see cref="Character.Image"/>, localises the name via
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/// <see cref="TranslationServer"/>, and calls <see cref="UpdateInfo"/>
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/// to refresh the HP bar.
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/// </summary>
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public void Init(Character character)
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{
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Card = character;
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BaseScale = Scale;
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IsDead = false;
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if (_sprite != null && character.Image != null)
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_sprite.Texture = character.Image;
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if (_nameLabel != null)
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_nameLabel.Text = TranslationServer.Translate(character.Name);
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UpdateInfo();
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}
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/// <summary>Refreshes the HP bar fill width and colour gradient based on current health percentage.</summary>
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public void UpdateInfo()
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{
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if (_hpFill == null || Card == null)
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return;
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var hpPercent = Card.Attributes.Health.Percent;
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_hpFill.Size = new Vector2((Size.X - 8) * hpPercent, 18);
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if (hpPercent > 0.5f)
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_hpFill.Color = new Color(0.1f, 0.85f, 0.1f, 1f);
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else if (hpPercent > 0.25f)
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_hpFill.Color = new Color(0.85f, 0.85f, 0.1f, 1f);
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else
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_hpFill.Color = new Color(0.85f, 0.1f, 0.1f, 1f);
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}
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/// <summary>Shows a coloured selection overlay with a 0.15s tween fade-in. Used for target highlighting and selection indication.</summary>
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public void Highlight(Color color)
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{
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if (_selection == null)
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return;
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_animTween?.Kill();
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_animTween = CreateTween();
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_animTween.SetEase(Tween.EaseType.Out).SetTrans(Tween.TransitionType.Quad);
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_animTween.TweenProperty(_selection, "modulate", color, 0.15f);
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}
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/// <summary>Fades out the selection overlay to transparent via a 0.15s tween.</summary>
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public void ClearHighlight()
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{
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if (_selection == null)
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return;
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_animTween?.Kill();
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_animTween = CreateTween();
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_animTween.SetEase(Tween.EaseType.Out).SetTrans(Tween.TransitionType.Quad);
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_animTween.TweenProperty(_selection, "modulate", new Color(0, 0, 0, 0), 0.15f);
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}
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/// <summary>Rapidly oscillates the widget's position with random offsets (6 iterations) to simulate impact feedback.</summary>
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public void Shake(float intensity, float duration)
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{
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var originalPos = Position;
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_animTween?.Kill();
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_animTween = CreateTween();
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for (int i = 0; i < 6; i++)
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{
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var offset = new Vector2(
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(float)GD.RandRange(-intensity, intensity),
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(float)GD.RandRange(-intensity, intensity)
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);
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_animTween.TweenProperty(this, "position", originalPos + offset, duration / 12f);
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_animTween.TweenProperty(this, "position", originalPos, duration / 12f);
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}
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}
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/// <summary>Briefly tints the entire widget with a colour pulse (30% rise, 70% fall) for damage/heal feedback.</summary>
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public void Flash(Color color, float duration)
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{
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var originalModulate = Modulate;
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_animTween?.Kill();
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_animTween = CreateTween();
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_animTween.TweenProperty(this, "modulate", color, duration * 0.3f);
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_animTween.TweenProperty(this, "modulate", originalModulate, duration * 0.7f);
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}
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/// <summary>
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/// Plays a dissolve-and-shrink death sequence. If a <c>"scene_transition"</c>
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/// shader is available, applies a dissolve material to the sprite. Fades the
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/// widget alpha, scales it to zero, and hides the HP bar and name label.
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/// Invokes <paramref name="onComplete"/> when finished so the parent panel
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/// can remove the widget from the grid.
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/// </summary>
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public void PlayDeathAnimation(Action onComplete)
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{
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if (IsDead)
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{
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onComplete?.Invoke();
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return;
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}
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IsDead = true;
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MouseFilter = MouseFilterEnum.Ignore;
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ClearHighlight();
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_animTween?.Kill();
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var duration = 0.7f;
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if (_dissolveShader == null)
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_dissolveShader = Shaders.Resolve("scene_transition");
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if (_dissolveShader != null && _sprite?.Texture != null)
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{
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var mat = new ShaderMaterial { Shader = _dissolveShader };
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mat.SetShaderParameter("noise_scale", 5f);
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mat.SetShaderParameter("smoothness", 0.25f);
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mat.SetShaderParameter("distortion", 0.092f);
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mat.SetShaderParameter("glow_intensity", 0f);
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mat.SetShaderParameter("hue_shift", 0f);
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mat.SetShaderParameter("invert_direction", false);
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mat.SetShaderParameter("progress", 0f);
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_sprite.Material = mat;
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var matTween = CreateTween();
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matTween.TweenMethod(
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Callable.From<float>(t => mat.SetShaderParameter("progress", t)),
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0f, 1f, duration);
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}
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var tween = CreateTween();
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tween.SetParallel(true);
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tween.TweenProperty(this, "modulate:a", 0f, duration * 0.5f);
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tween.TweenProperty(this, "scale", BaseScale * new Vector2(0.1f, 1.2f), duration);
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tween.TweenProperty(_hpBg, "modulate:a", 0f, duration);
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tween.TweenProperty(_hpFill, "modulate:a", 0f, duration);
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tween.TweenProperty(_nameLabel, "modulate:a", 0f, duration);
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tween.Chain().TweenProperty(this, "scale", Vector2.Zero, 0.15f);
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tween.Finished += () =>
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{
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onComplete?.Invoke();
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};
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}
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}
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}
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