/// <summary>
/// Get curve point base on anchor points and t.
/// </summary>
/// <param name="anchor">Anchor points of curve.</param>
/// <param name="t">t is in the range(0~1).</param>
/// <returns>Point on curve.</returns>
public static Vector3 GetPointAt(CubicBezierAnchor anchor, float t)
{
return(Mathf.Pow(1 - t, 3) * anchor.start + 3 * t * Mathf.Pow(1 - t, 2) * anchor.startTangent +
3 * (1 - t) * Mathf.Pow(t, 2) * anchor.endTangent + Mathf.Pow(t, 3) * anchor.end);
}
/// <summary>
/// Get curve point base on anchor points and key.
/// </summary>
/// <param name="anchor">Anchor points of curve.</param>
/// <param name="key">Key is in the range(0~1).</param>
/// <returns>Point on curve.</returns>
public static Vector3 GetPointAt(CubicBezierAnchor anchor, float key)
{
return(Mathf.Pow(1 - key, 3) * anchor.start + 3 * key * Mathf.Pow(1 - key, 2) * anchor.startTangent +
3 * (1 - key) * Mathf.Pow(key, 2) * anchor.endTangent + Mathf.Pow(key, 3) * anchor.end);
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="anchor">Anchor points of curve.</param>
public CubicBezierCurve(CubicBezierAnchor anchor)
{
this.anchor = anchor;
}
/// <summary>
/// Constructor.
/// </summary>
public CubicBezierCurve()
{
anchor = new CubicBezierAnchor();
}