C#或unity中實現正弦函式

本類用於第一，需要繪製一條正弦曲線的朋友；第二，需要根據正弦曲線控制物體運動的朋友；裡面都有註釋，程式碼如下：

unity中使用的程式碼：

public class Curvy_Sin
{
    /// <summary>
    /// 週期
    /// </summary>
    private float lifeTime = 2;
    /// <summary>
    /// 波峰
    /// </summary>
    private float MaxPos = 0;
    /// <summary>
    ///
 
 波谷
    /// </summary>
    private float MinPos = 0;
    /// <summary>
    /// 計算時使用的週期，避免週期為小於零的情況
    /// </summary>
    private float ZQ
    {
        get
        {
            if (lifeTime <= 0)
            {
                return 2;
            }
            else
            {
                
 
return lifeTime;
            }
        }
    }
    /// <summary>
    /// 構造一個正弦曲線
    /// </summary>
    /// <param name="zhouqi"></param>
    /// <param name="minp"></param>
    /// <param name="maxp"></param>
    public Curvy_Sin(float zhouqi, float minp, float maxp)
    {
        
 
this.lifeTime = zhouqi;
        this.MinPos = minp;
        this.MaxPos = maxp;
    }
    /// <summary>
    /// 根據X軸獲取對應Y軸的值
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public float GetZhengXianValue(float x)
    {
        float innner = (2 * (float)Mathf.PI) / ZQ;
        float ya = (float)Mathf.Sin(innner * x);
        float maall = (MaxPos - MinPos) * 0.5f;
        float middle = maall + MinPos;
        return (middle + maall * ya);
    }
    /// <summary>
    /// 修改正弦引數
    /// </summary>
    /// <param name="zhouqi"></param>
    /// <param name="minp"></param>
    /// <param name="maxp"></param>
    public void SetCurvyZhengXian(float zhouqi, float minp, float maxp)
    {
        this.lifeTime = zhouqi;
        this.MinPos = minp;
        this.MaxPos = maxp;
    }
}

C#中winform或WPF

public class Curvy_Sin
{
    /// <summary>
    /// 週期
    /// </summary>
    private float lifeTime = 2;
    /// <summary>
    /// 波峰
    /// </summary>
    private float MaxPos = 0;
    /// <summary>
    /// 波谷
    /// </summary>
    private float MinPos = 0;
    /// <summary>
    /// 計算時使用的週期，避免週期為小於零的情況
    /// </summary>
    private float ZQ
    {
        get
        {
            if (lifeTime <= 0)
            {
                return 2;
            }
            else
            {
                return lifeTime;
            }
        }
    }
    /// <summary>
    /// 構造一個正弦曲線
    /// </summary>
    /// <param name="zhouqi"></param>
    /// <param name="minp"></param>
    /// <param name="maxp"></param>
    public Curvy_Sin(float zhouqi, float minp, float maxp)
    {
        this.lifeTime = zhouqi;
        this.MinPos = minp;
        this.MaxPos = maxp;
    }
    /// <summary>
    /// 根據X軸獲取對應Y軸的值
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public float GetZhengXianValue(float x)
    {
        float innner = (2 * (float)Math .PI) / ZQ;
        float ya = (float)Math.Sin(innner * x);
        float maall = (MaxPos - MinPos) * 0.5f;
        float middle = maall + MinPos;
        return (middle + maall * ya);
    }
    /// <summary>
    /// 修改正弦引數
    /// </summary>
    /// <param name="zhouqi"></param>
    /// <param name="minp"></param>
    /// <param name="maxp"></param>
    public void SetCurvyZhengXian(float zhouqi, float minp, float maxp)
    {
        this.lifeTime = zhouqi;
        this.MinPos = minp;
        this.MaxPos = maxp;
    }
}

原文：http://www.shiweikeji.club/?p=316