和線性差值一樣
傳入坐標(biāo)點(diǎn)數(shù)組和0到1的區(qū)間值，返回坐標(biāo)

public Vector3 BesselCurve(Vector3[] pos, float t)
    {
        Vector3[] arr = new Vector3[pos.Length - 1];
        for (int i = 0; i < arr.Length; i++)
        {
            arr[i] = pos[i] * (1 - t) + pos[i + 1] * t;
            Debug.DrawLine(pos[i], pos[i + 1], Color.red);
        }
        if (arr.Length == 1)
        {
            return arr[0];
        }
        else
        {
            return BesselCurve(arr, t);
        }
    }