覆盖静态字段

Overriding static field(覆盖静态字段)

问题描述

我正在为我的游戏编写 C# 游戏引擎，但遇到了问题.

I'm writing a C# game engine for my game, and I've hit a problem.

我需要为每种不同类型的块做一个 XNA.Rectangle drawRectangle.

I need to do a XNA.Rectangle drawRectangle for each different type of block.

块存储在一个块列表中，因此必须覆盖该属性，以便通过绘制访问而无需大量转换.

Blocks are stored in a list of blocks, so the property, to be accessible by draw without casting a lot, must be overriden.

我尝试了很多方法，但都没有成功.

I've tried lots of ways of doing it, but none work.

这是我目前正在做的:

块.cs

protected static Rectangle m_drawRectangle = new Rectangle(0, 0, 32, 32);
public Rectangle drawRectangle
{
    get { return m_drawRectangle; }
}

BlockX.cs

protected static Rectangle m_drawRectangle = new Rectangle(32, 0, 32, 32);

但是在创建 BlockX 并访问 drawRectangle 时，它仍然返回 0, 0, 32, 32.

However when creating BlockX and accessing drawRectangle, it still returns 0, 0, 32, 32.

理想情况下，我可以只覆盖 drawRectangle 成员，但是这样做意味着在每个块类中创建一个成员.我只想调整m_drawRectangle.

Ideally I could just override the drawRectangle member, however doing this would mean creating a member in every single block class. I only want to adjust m_drawRectangle.

每个块都会被创建数百次，所以我不希望它是非静态的，在构造函数中这样做会很愚蠢.

Each block will be created hundreds of times so I don't want it to be non-static, and it would be silly to do it in the constructor.

除了在每个块中放置一个静态函数来初始化静态事物之外，还有什么更好的方法吗?

Is there any better way other than just putting a static function to initialise static things in every block?

所以总结一下，我的要求是:

So to sum up, my requirements are:

• BlockX.cs 中需要覆盖的最少额外代码
• 字段必须保持静态
• 最好不必重写drawRectangle，只需m_drawRectangle.
• 不必每次访问属性时都创建一个新矩形

推荐答案

静态成员不会被多态调用——就这么简单.请注意，您谈论的是 保持 静态属性 - 目前您没有 静态属性.您有一个实例属性和两个静态 字段.

Statics members aren't called polymorphically - it's as simple as that. Note that you talk about the property staying static - you don't have a static property at the moment. You have an instance property, and two static fields.

几个选项:

• 在每个类中被覆盖的虚拟成员，即使它不需要对象的任何状态(除了其类型)
• 将要绘制的矩形传入块的构造函数中，并将其存储在一个字段中

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