使用 Cocos2D 和 Box2D 进行光照和阴影
我目前正在开发一款适用于 iPad 和 iPad 的游戏。 iPhone 使用 Cocos2d 和 Box2d。 如果能实现像此视频中那样的照明效果，那就太酷了：
http:// /www.youtube.com/watch?v=Elnpm-gNI04
并在此链接上：
http://www.catalinzima。 com/2010/07/my-technique-for-the-shader-based-dynamic-2d-shadows/
我可以尝试用 Cocos2d 和 Box2d 复制效果根据链接中的描述，但我不确定我是否能够走得很远。它看起来非常先进和沉重。
我怎样才能以“简单”的方式实现这一目标？有谁知道类似这样的 Cocos2d 版本，或者有人能给我指出正确的方向吗？
I am currently developing a game for iPad & iPhone using Cocos2d with Box2d.
It would have been majorly cool to achieve a lighting effect like the one in this video:
http://www.youtube.com/watch?v=Elnpm-gNI04
and on this link:
http://www.catalinzima.com/2010/07/my-technique-for-the-shader-based-dynamic-2d-shadows/
I could have a go at trying to replicate the effect with Cocos2d and Box2d from the description in the link, but I am unsure if I would be able to get very far. It looks pretty advanced and heavy.
How can I achieve this in an "easy" way? Does anyone know of a Cocos2d-version of something like this, or do anyone have some pointers to point me in the right direction?
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http://code.google.com/p/box2dlights/
我已经成功制作了使用 box2d 几何和 rayCasting 的动态光源库。我的库在gles1.0和gles2.0下工作并使用libgdx作为框架。这足以为移动设备的 2D 游戏提供动态实时灯光。我可以帮助将其移植到 Cocos2D。基础知识非常简单。当我第一次为自己的游戏破解它时，它还不到 100 行。
例子：
点光源从中心发射n条光线，并记录下最近的碰撞点。这些碰撞点用于使用渐变着色并使用附加混合绘制的网格。
http://code.google.com/p/box2dlights/
I have succesfully made dynamic light library that use box2d geometry and rayCasting. My library work under gles1.0 and gles2.0 and use libgdx as framework. This is peformant enough for giving dynamic real time lights to 2d games for mobile devices. I can help with porting that to Cocos2D. Basics are darn simple. It was under 100 lines when I first hacked it working for my own game.
Example:
Point light shoot from center n number of rays around it and record the closest collision points. These collision points are used for mesh that is colored with gradient and drawed with additive blending.
尝试查看此链接。
http://www.cocos2d-iphone.org/forum/topic/27856
他遵循 Catalin Zima 使用的技术，使用 cocos2d + Chipmunk 成功添加了简单的动态光。
请注意，如果您下载他的项目并尝试编译 iOS 构建，然后删除“运行脚本”构建阶段，因为您可能会遇到脚本未找到错误。有关删除此类阶段的更多信息，请参见此处。
Try to look at this link.
http://www.cocos2d-iphone.org/forum/topic/27856
He successfully added simple dynamic light using cocos2d + chipmunk following the technique that Catalin Zima used.
Please note if you download his project and try to compile iOS build, then remove "Run Script" build phase as you may experience script didn't found error. More info to remove such phase can be seen here.