javascript - 如何将JavaScript(UnityScript)转换为C#并实现低通滤波器？

Question

我一直在尝试将 Unity 手册中找到的低通滤波器代码示例实现到我的游戏中，但遇到了一些问题。

以下是 Unity 手册中的原始 JavaScript 示例:

var AccelerometerUpdateInterval : float = 1.0 / 60.0;
var LowPassKernelWidthInSeconds : float = 1.0;

private var LowPassFilterFactor : float = AccelerometerUpdateInterval /    LowPassKernelWidthInSeconds; // tweakable
private var lowPassValue : Vector3 = Vector3.zero;

function Start () 
{
    lowPassValue = Input.acceleration;
}

function LowPassFilterAccelerometer() : Vector3 
{
    lowPassValue = Mathf.Lerp(lowPassValue, Input.acceleration, LowPassFilterFactor);
    return lowPassValue;
}

这是我到 C# 的转换:

float AccelerometerUpdateInterval = 1.0f / 60.0f;
float LowPassKernelWidthInSeconds = 1.0f;

private float LowPassFilterFactor = AccelerometerUpdateInterval / LowPassKernelWidthInSeconds; // tweakable
private Vector3 lowPassValue = Vector3.zero;

void  Start ()
{
    lowPassValue = Input.acceleration;
}

Vector3 LowPassFilterAccelerometer ()
{
    lowPassValue = Mathf.Lerp(lowPassValue, Input.acceleration, LowPassFilterFactor);
    return lowPassValue;
}

我使用加速度计移动 Angular 色的原始代码是这样的(没有低通滤波器):

float speed = 30.0f;
Vector2 dir;
private float accel;

void Start () 
{
    accel = Input.acceleration.x;
}

// Update is called once per frame
void Update () 
{  
    accel = Mathf.MoveTowards (accel, Input.acceleration.x, speed * Time.deltaTime);
    dir = new Vector3(accel, 0);

    // move the object at the velocity defined in speed:
    transform.Translate(dir * speed * Time.deltaTime, 0);
}

这是我尝试实现低通滤波器以减少噪声/抖动:

float AccelerometerUpdateInterval = 1.0f / 60.0f;
float LowPassKernelWidthInSeconds = 1.0f;

private float LowPassFilterFactor;
private Vector3 lowPassValue = Vector3.zero;

public float speed = 30.0f;

void Start () 
{
    lowPassValue = Input.acceleration;
    LowPassFilterFactor = AccelerometerUpdateInterval / LowPassKernelWidthInSeconds; 
}

Vector3 LowPassFilterAccelerometer() 
{
    lowPassValue = Mathf.Lerp(lowPassValue, Input.acceleration, LowPassFilterFactor);
    return lowPassValue;
}

// Update is called once per frame
void Update () 
{  
    // move the object at the velocity defined in speed:
    transform.Translate(LowPassFilterAccelerometer() * speed * Time.deltaTime, 0);
}

当我尝试编译脚本时遇到一些错误:

error CS1502: The best overloaded method match for `UnityEngine.Mathf.Lerp(float, float, float)' has some invalid arguments

error CS1503: Argument #1' cannot convertUnityEngine.Vector3' expression to type `float'

Answer 1

示例代码可能是错误的。使用Vector3.Lerp()反而。 Lerps 的完整列表是 here 。