与前一个值相比，如何放大或放大变量值的小变化？

Question

我有一个对象，其y轴的值非常微小地变化。我想放大此更改，以使其更引人注意。

我的想法是简单地比较当前值和先前值，找到差异，然后将该差异与放大系数一起添加到y轴值。这就是我想出的：

public float amplifyBy = 1.5f;
void Update()
    {
        // This calculates the center position of 4 objects and sets the transform of this object to this position
        optimalCentre = (targetAnchor1.position + targetAnchor2.position + targetAnchor3.position + targetAnchor4.position) / 4;

        // below is to amplify the y movement as there is almost no visible bounciness.
        if (optimalCentre.y != previousY)
        {
            // find difference in change
            float diff_ = previousY - optimalCentre.y;
            transform.position = new Vector3(optimalCentre.x, optimalCentre.y + (diff_ * amplifyBy), optimalCentre.z);
            Debug.Log(diff_);
        }
        else
        {
            transform.position = optimalCentre;
        }


        previousY = transform.position.y;
    }

这没有按预期方式工作，似乎正在发生的事情是，所应用的任何放大因子一直增加到无穷大，并且gameObject很快超出了范围。

谢谢

Answer 1

声明一个公差值，如

const float Tolerance = 0.1f;

然后比较像

if(Math.Abs(optimalCentre.y - previousY) < Tolerance)
    {
        // find difference in change
        float diff_ = previousY - optimalCentre.y;
        transform.position = new Vector3(optimalCentre.x, optimalCentre.y + (diff_ * amplifyBy), optimalCentre.z);
        Debug.Log(diff_);
    }