40 lines
1.3 KiB
C#
40 lines
1.3 KiB
C#
using Coffee.UISoftMaskInternal;
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using UnityEngine;
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using UnityEngine.UI;
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namespace Coffee.UISoftMask
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{
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/// <summary>
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/// Alpha-based hit testing on a UI element
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/// </summary>
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[ExecuteAlways]
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[RequireComponent(typeof(Graphic))]
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[DisallowMultipleComponent]
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[Icon("Packages/com.coffee.softmask-for-ugui/Icons/SoftMaskIcon.png")]
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public class AlphaHitTestTarget : MonoBehaviour, ICanvasRaycastFilter
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{
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private Graphic _graphic;
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/// <summary>
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/// Graphic component on this GameObject.
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/// </summary>
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public Graphic graphic => _graphic || TryGetComponent(out _graphic) ? _graphic : null;
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private void OnEnable() { }
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private void OnDisable() { }
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/// <summary>
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/// This method is called during canvas ray-casting to determine if the hit point is valid or not.
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/// </summary>
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bool ICanvasRaycastFilter.IsRaycastLocationValid(Vector2 sp, Camera eventCamera)
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{
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// Check if this component is active and enabled, if the Graphic component is not null, and if the Graphic is active.
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if (!isActiveAndEnabled || !graphic || !graphic.IsActive()) return true;
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// Perform alpha-based hit testing.
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return Utils.AlphaHitTestValid(graphic, sp, eventCamera, 0.01f);
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}
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}
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}
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