60 lines
2.0 KiB
C#
60 lines
2.0 KiB
C#
using UnityEngine.VFX;
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namespace UnityEngine.VFX.Utility
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{
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[AddComponentMenu("VFX/Property Binders/Velocity Binder")]
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[VFXBinder("Transform/Velocity")]
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class VFXVelocityBinder : VFXSpaceableBinder
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{
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public string Property { get { return (string)m_Property; } set { m_Property = value; } }
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[VFXPropertyBinding("UnityEngine.Vector3"), SerializeField]
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public ExposedProperty m_Property = "Velocity";
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public Transform Target = null;
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private static readonly float invalidPreviousTime = -1.0f;
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private float m_PreviousTime = invalidPreviousTime;
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private Vector3 m_PreviousPosition = Vector3.zero;
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public override bool IsValid(VisualEffect component)
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{
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return Target != null && component.HasVector3((int)m_Property);
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}
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public override void Reset()
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{
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m_PreviousTime = invalidPreviousTime;
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}
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public override void UpdateBinding(VisualEffect component)
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{
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Vector3 velocity = Vector3.zero;
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float time;
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#if UNITY_EDITOR
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if (Application.isEditor && !Application.isPlaying)
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time = (float)UnityEditor.EditorApplication.timeSinceStartup;
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else
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#endif
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time = Time.time;
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var currentPosition = ApplySpacePosition(component, m_Property, Target.position);
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if (m_PreviousTime != invalidPreviousTime)
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{
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var delta = currentPosition - m_PreviousPosition;
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var deltaTime = time - m_PreviousTime;
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if (Vector3.SqrMagnitude(delta) > Mathf.Epsilon && deltaTime > Mathf.Epsilon)
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velocity = delta / deltaTime;
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}
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component.SetVector3((int)m_Property, velocity);
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m_PreviousPosition = currentPosition;
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m_PreviousTime = time;
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}
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public override string ToString()
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{
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return string.Format("Velocity : '{0}' -> {1}", m_Property, Target == null ? "(null)" : Target.name);
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}
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}
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}
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