116 lines
2.8 KiB
C#
116 lines
2.8 KiB
C#
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/// Credit Titinious (https://github.com/Titinious)
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/// Sourced from - https://github.com/Titinious/CurlyUI
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namespace UnityEngine.UI.Extensions
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{
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/// <summary>
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/// Assume to be a cubic bezier curve at the moment.
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/// </summary>
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public class CUIBezierCurve : MonoBehaviour
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{
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public readonly static int CubicBezierCurvePtNum = 4;
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#region Descriptions
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[SerializeField]
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protected Vector3[] controlPoints;
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public Vector3[] ControlPoints
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{
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get
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{
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return controlPoints;
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}
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}
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#if UNITY_EDITOR
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/// <summary>
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/// Reserve for editor only
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/// </summary>
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public Vector3[] EDITOR_ControlPoints
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{
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set
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{
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controlPoints = value;
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}
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}
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#endif
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#endregion
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#region Events
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#if UNITY_EDITOR
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protected void OnValidate()
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{
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Refresh();
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}
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#endif
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public void Refresh()
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{
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if (OnRefresh != null)
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OnRefresh();
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}
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#endregion
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#region Services
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/// <summary>
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/// call this to get a sample
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/// </summary>
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/// <param name="_time"></param>
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/// <returns>sample returned by said time</returns>
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public Vector3 GetPoint(float _time)
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{
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float oneMinusTime = 1 - _time;
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return oneMinusTime * oneMinusTime * oneMinusTime * controlPoints[0] +
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3 * oneMinusTime * oneMinusTime * _time * controlPoints[1] +
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3 * oneMinusTime * _time * _time * controlPoints[2] +
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_time * _time * _time * controlPoints[3];
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}
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public Vector3 GetTangent(float _time)
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{
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float oneMinusTime = 1 - _time;
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return 3 * oneMinusTime * oneMinusTime * (controlPoints[1] - controlPoints[0]) +
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6 * oneMinusTime * _time * (controlPoints[2] - controlPoints[1]) +
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3 * _time * _time * (controlPoints[3] - controlPoints[2]);
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}
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#endregion
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#region Configurations
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public void ReportSet()
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{
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if (controlPoints == null)
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{
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controlPoints = new Vector3[CUIBezierCurve.CubicBezierCurvePtNum];
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controlPoints[0] = new Vector3(0, 0, 0);
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controlPoints[1] = new Vector3(0, 1, 0);
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controlPoints[2] = new Vector3(1, 1, 0);
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controlPoints[3] = new Vector3(1, 0, 0);
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}
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bool isPointsReady = true;
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isPointsReady = isPointsReady & controlPoints.Length == CUIBezierCurve.CubicBezierCurvePtNum;
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}
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#endregion
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#region Services
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public System.Action OnRefresh;
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#endregion
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}
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}
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