Question

我在.NET控制台中创建了一个渲染引擎，为此我已经使用Inherited RenderObject构建了该结构。

此RenderObject是一个类，用于存储继承此对象的对象的所有渲染信息。例如，X，Y坐标，宽度和高度等。

我试图做以下事情。但它反而从RenderObject（继承对象）而不是子对象调用Render函数。

我如何实现这一目标？调用Childs渲染函数而不是Parent渲染函数。

谢谢！

渲染器：

class Renderer {

    public List<RenderObject> RenderObjects { get; }

    public Renderer()
    {
        RenderObjects = new List<RenderObject>();

        AddRenderObject(new RenderText());
        AddRenderObject(new RenderBox());
    }

    public void AddRenderObject(RenderObject ro)
    {
        RenderObjects.Add(ro);
    }

    public void Draw()
    {
        foreach(RenderObject ro in RenderObjects)
        {
            ro.Render(); //This should call the function from RenderText and RenderBox
        }
    }
}

父类（可以继承的类）

class RenderObject
{
    public int X;
    public int Y;
    public int Width;
    public int Height;

    public void Render()
    {
       //This should NOT be called
    }
}

继承RenderObject的子对象

class RenderBox : RenderObject
{
    public void Render()
    {
        //This should be called
    }
}

class RenderText : RenderObject
{
    public void Render()
    {
        //This should be called
    }
}

Answer 1

您应将其标记为virtual并在子类

中覆盖它们

class RenderObject
{
    public int X;
    public int Y;
    public int Width;
    public int Height;

    public virtual void Render()
    {
       //This should NOT be called
    }
}

class RenderBox : RenderObject
{
    public override void Render()
    {
        //This should be called
    }
}

class RenderText : RenderObject
{
    public override void Render()
    {
        //This should be called
    }
}

从Child调用函数而不是父类C＃

1 个答案: