c# – 圆角上的点不均匀间隔

x = originX radius * Cos(角度);

y = originY radius * Sin(角度);

为什么这些点不能均匀分布在圆的边缘？

结果图：

class Circle
{
    public Vector2 Origin { get; set; }
    public float Radius { get; set; }
    public List<Vector2> Points { get; set; }

    private Texture2D _texture;

    public Circle(float radius,Vector2 origin,ContentManager content)
    {
        Radius = radius;
        Origin = origin;
        _texture = content.Load<Texture2D>("pixel");
        Points = new List<Vector2>();

        //i = angle
        for (int i = 0; i < 360; i++)
        {
            float x = origin.X + radius * (float)Math.Cos(i);
            float y = origin.Y + radius * (float)Math.Sin(i);
            Points.Add(new Vector2(x,y));
        }
    }

    public void Draw(SpriteBatch spriteBatch)
    {
        for (int i = 0; i < Points.Count; i++)
            spriteBatch.Draw(_texture,Points[i],new Rectangle(0,_texture.Width,_texture.Height),Color.Red);
    }
}