blocks|key|3845986|text|你在找什么平台？你用什么库取决于这个。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3845987|对于XNA框架，Farseer相当不错。|3845988|entityMap^0|0|8|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

What platform are you looking for? What library you use will depend on this.

For the XNA framework, Farseer is pretty nice.

blocks|key|5256789|text|听起来Chipmunk可能会满足您的需求。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5256790|entityMap|0|LINK|mutability|MUTABLE|url|http://chipmunk-physics.net/^0|3|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

It sounds like <a href="http://chipmunk-physics.net/" rel="nofollow noreferrer">Chipmunk</a> might meet your needs.

blocks|key|3001899|text|你可以看看Havok引擎。我相信他们发布了一个非商业用途的免费版本。它有一个约束工具包，允许您将物理约束到两个平面，在您的情况下，x和y。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3001900|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You could look at the Havok engine. I believe they released a free version for non-commerical use. There is a constraint kit for it that will allow you to constrain the physics to 2 planes, in your case, x and y.

blocks|key|757064|text|大多数2D侧滚平台游戏中的物理原理非常简单，你可以很容易地自己实现它们。你想要什么样的效果？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|757065|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The physics in most 2D side-scrolling platform games are so simple that you could easily implement them yourself. What kind of effects are you looking for?

blocks|key|5256997|text|如果你有时间，你可以使用PhysX，但它可能对2D有过度的杀伤力。此外，如果你计划让你的游戏在PC上运行，并想要一些很酷的物理知识，可以尝试在谷歌上搜索"verlet集成“我知道周围有相当多的verlet实现(很适合粒子和2D碎布玩偶)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5256998|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you got the time you could use PhysX but its likely an over kill for 2D.
Besides that if you plan on having your game work on a PC and want some cool physics, try googling for "verlet integration" I know there are quite a few verlet implementations around (nice for particles and 2D rag-dolls).

blocks|key|757147|text|我在个人项目中使用过Box2D。它是一个2D物理模拟API。但是，如果你想要的更多的是游戏/图形API，那就有点夸大其词了。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|757148|entityMap|0|LINK|mutability|MUTABLE|url|http://www.box2d.org/^0|A|5|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I've used <a href="http://www.box2d.org/" rel="nofollow noreferrer">Box2D</a> in personal projects. It is a 2D physic simulation API. But, it might be overkill if what you want is more a game/graphic API.

blocks|key|3002152|text|您最好的选择很可能是Box2D。它做2D物理，有很多选择，并且很容易集成到现有的项目中。默认情况下，它对固定实体执行CCD，但可以有选择地将任何刚体包括在CCD计算中。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3002153|entityMap|0|LINK|mutability|MUTABLE|url|http://www.box2d.org/^0|A|5|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Your best bet is most likely <a href="http://www.box2d.org/" rel="nofollow noreferrer">Box2D</a>. It does 2D physics, has tons of options, and is very easy to integrate into an existing project. It does CCD by default for fixed bodies, but any rigid body can be selectively included in the CCD calculation.

blocks|key|757178|text|这家伙在Javascript游戏上做了很多工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|757179|http://blog.nihilogic.dk/|offset|length|757180|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|P|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

This guy has done a lot of work with Javascript games:

<a href="http://blog.nihilogic.dk/" rel="nofollow noreferrer">http://blog.nihilogic.dk/</a>

blocks|key|3002217|text|你也可以用opende做二维物理。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3002218|entityMap|0|LINK|mutability|MUTABLE|url|http://opende.sourceforge.net/^0|5|6|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can do 2d physics with <a href="http://opende.sourceforge.net/" rel="nofollow noreferrer">opende</a> as well

blocks|key|754105|text|要回答你问题的第二部分，如果你想了解一个简单的2D平台是如何工作的，请阅读tutorials+for+N。是的，N是一个基于flash的游戏，但这并不意味着它不是一个“真正的”游戏，所以碰撞检测(和响应)教程非常适用。它们是简单易懂的读物，在页面中嵌入了一些直观的演示，以展示几何概念。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|754106|entityMap|0|LINK|mutability|MUTABLE|url|http://www.harveycartel.org/metanet/tutorials.html^0|11|F|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

To answer the second part of your question, if you want to get a handle on how a simple 2D platformer works, take a read through the <a href="http://www.harveycartel.org/metanet/tutorials.html" rel="nofollow noreferrer">tutorials for N</a>. Yes, N is a flash-based game but that doesn't mean it isn't constructed like a "real" game, so the collision detection (and response) tutorials are very much applicable. They're a straightforward read with some intuitive demos embedded in the page to show off the geometric concepts.

Can anyone point me to a library for 2D game physics, etc for programming gravity, jumping actions, etc for a 2d platform/sidescrolling game ?
Or could you suggest some algorithms for side scroller like mario, sonic etc?

2d game physics?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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有没有人能给我推荐一个2D游戏物理等的库，用来为2d平台/侧滚游戏编程重力、跳跃动作等？或者你能推荐一些像mario，sonic之类的侧滚屏算法吗？

问2d游戏物理？
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