XiJianYCYL/Assets/XDKUnityCloudExamples/Common/Scripts/Tween/TweenOffset.cs

using UnityEngine;
/// <summary>
/// Tween the object's Offset.
/// </summary>
public class TweenOffset : Tweener
{
    [System.NonSerialized]
    public Vector3 defaultPosition = Vector3.one * 213.57f;
    public Vector3 offset;
    Transform mTrans;

    public Transform cachedTransform {
        get {
            if (mTrans == null)
                mTrans = transform;
            return mTrans;
        }
    }

    /// <summary>
    /// Tween's current value.
    /// </summary>

    public Vector3 value {
        get {
            return cachedTransform.localPosition;
        }
        set {
            cachedTransform.localPosition = value;
        }
    }


    /// <summary>
    /// Tween the value.
    /// </summary>

    protected override void OnUpdate(float factor, bool isFinished)
    {
        if (defaultPosition == Vector3.one * 213.57f)
            defaultPosition = value;
        Vector3 v3 = value;
        if (offset.x != 0)
            v3.x = defaultPosition.x * (1f - factor) + (defaultPosition.x + offset.x) * factor;
        if (offset.y != 0)
            v3.y = defaultPosition.y * (1f - factor) + (defaultPosition.y + offset.y) * factor;
        if (offset.z != 0)
            v3.z = defaultPosition.z * (1f - factor) + (defaultPosition.z + offset.z) * factor;
        value = v3;
        //value = defaultPosition * (1f - factor) + (defaultPosition + offset) * factor;
    }

    /// <summary>
    /// Start the tweening operation.
    /// </summary>

    static public TweenOffset Begin(GameObject go, float duration, Vector3 offset)
    {
        TweenOffset comp = Tweener.Begin<TweenOffset>(go, duration);
        comp.offset = offset;

        if (duration <= 0f)
        {
            comp.Sample(1f, true);
            comp.enabled = false;
        }
        return comp;
    }
}