三角函数画圆

最新推荐文章于 2023-05-31 16:14:38 发布

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最新推荐文章于 2023-05-31 16:14:38 发布

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分类专栏： 3D数学文章标签：三角函数 Gizmos

本文链接：https://blog.youkuaiyun.com/sinat_34791632/article/details/80995052

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  public float redius;//半径
    public float angle;//偏移角度

    private float parts = 0;
    private const float pi = 3.14f;
    private List<Vector2> circleList = new List<Vector2>();

    void Start()
    {
        parts = 360 * (1 / angle);
        DrawCircle(redius, angle, parts);

    }

     void OnDrawGizmos()
    {
        for (int i = 0; i < circleList.Count - 1; i++)
        {
            Gizmos.DrawLine(new Vector3(circleList[i].x, 0, circleList[i].y), new Vector3(circleList[i + 1].x, 0, circleList[i + 1].y));
            Gizmos.color = Color.red;
        }
    }

    void DrawCircle(float r, float angle, float parts)
    {
        Debug.Log("这个圆可以分为" + parts + "部分");
        Vector3 center = transform.position;
        float x, z;
        for (int i = 0; i <= parts; i++)
        {
            //r += 0.15f;
            x = center.x + Mathf.Sin(angle * i * (pi / 180f)) * r;
            z = center.z + Mathf.Cos(angle * i * (pi / 180f)) * r;

            circleList.Add(new Vector2(x, z));
        }
    }