cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   awolCZ
   Member

   Hi all,

   I'm trying to find out how could be lights done in cocos2d. I can't code under OpenGL, so using some OpenGL lights is impossible for me. I tought that this is impossible, but then I played Zenonia and it seems to me that they are using some bitmap light simulation. Do you know how they do it? Only thing that comes on my mind is that they cover the whole scene with some tiled black images with holes in it. Is it correct? Ore do they use some pixel modulation? Or OpenGL?

   Thank you for your help.

   Posted 2 years ago #
2. 

   cjl
   Member

   Check out:

   http://www.cocos2d-iphone.org/forum/topic/290#post-1607

   Posted 2 years ago #
3. 

   awolCZ
   Member

   Thanks for the reply. But I still do not understand the part "cut the transparency out" :) How is this performed?

   Posted 2 years ago #
4. 

   ob1
   Member

   I think he means that he overlays a black partially transparent image over the whole screen. And that the image is cut (in photoshop for example) where the light shines.

   Posted 2 years ago #
5. 

   awolCZ
   Member

   I understand what you mean, but using this, you would only have static spot light direction and only fixed light positions in case of more ligh sources. But in Zenonia for example there are multiple light sources on the screen. This means that this cut out must be done programicaly in the runtime. But how, it is mystery for me :)

   Posted 2 years ago #
6. 

   ob1
   Member

   Well then that's a mystery for me too, and it would also help me for my game to know :-D

   Posted 2 years ago #
7. 

   Steve Oldmeadow
   Administrator

   Have a look at this thread in the old forum, also check the open source game Gorillas.

   http://groups.google.com/group/cocos2d-iphone-discuss/browse_frm/thread/dab9b84cd5262d80/a36c3d1cf1f20970?lnk=gst&q=scratch+off#a36c3d1cf1f20970

   Posted 2 years ago #

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