85 lines
2.5 KiB
C#
85 lines
2.5 KiB
C#
using UnityEngine.Events;
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namespace UnityEngine.XR.Content.Interaction
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{
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/// <summary>
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/// Runs functionality when an object is tilted.
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/// Used with grabbable objects for pouring.
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/// </summary>
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public class OnTilt : MonoBehaviour
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{
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/// <summary>
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/// Extra angle value that is added/removed from the threshold to events from rapid-fire triggering on and off.
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/// </summary>
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const float k_AngleBuffer = 0.05f;
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[SerializeField]
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[Tooltip("Tilt range, 0 - 180 degrees.")]
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[Range(k_AngleBuffer * 2f, (1 - k_AngleBuffer * 2f))]
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float m_Threshold = 0.5f;
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[SerializeField]
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[Tooltip("The transform to check for tilt. Will default to this object if not set.")]
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Transform m_Target;
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[SerializeField]
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[Tooltip("The transform to get as the source of the 'up' direction. Will default to world up if not set.")]
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Transform m_UpSource;
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[SerializeField]
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[Tooltip("Event to trigger when tilting goes over the threshold.")]
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UnityEvent m_OnBegin = new UnityEvent();
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[SerializeField]
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[Tooltip("Event to trigger when tilting returns from the threshold.")]
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UnityEvent m_OnEnd = new UnityEvent();
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/// <summary>
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/// Event to trigger when tilting goes over the threshold.
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/// </summary>
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public UnityEvent onBegin => m_OnBegin;
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/// <summary>
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/// Event to trigger when tilting returns from the threshold.
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/// </summary>
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public UnityEvent onEnd => m_OnEnd;
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bool m_WithinThreshold;
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void Update()
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{
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CheckOrientation();
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}
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void CheckOrientation()
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{
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var targetUp = m_Target != null ? m_Target.up : transform.up;
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var baseUp = m_UpSource != null ? m_UpSource.up : Vector3.up;
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var similarity = Vector3.Dot(-targetUp, baseUp);
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similarity = Mathf.InverseLerp(-1, 1, similarity);
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if (m_WithinThreshold)
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similarity += k_AngleBuffer;
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else
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similarity -= k_AngleBuffer;
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var thresholdCheck = (similarity >= m_Threshold);
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if (m_WithinThreshold != thresholdCheck)
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{
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m_WithinThreshold = thresholdCheck;
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if (m_WithinThreshold)
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{
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m_OnBegin.Invoke();
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}
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else
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{
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m_OnEnd.Invoke();
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}
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}
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}
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}
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}
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