cocos2d for iPhone

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

1. 

   ob1
   Member

   I have started working on a new project, a kind of side scroller.

   However it doesn't use tiles, but a huge image file for the level background.

   I was wondering what's the best way to handle this in Cocos.

   Cut the background in 320x1024 pieces and use a tile map ?

   Thanks.

   Posted 2 years ago #
2. 

   riq
   Key Master

   what do you mean by "huge" image ?

   Posted 2 years ago #
3. 

   ob1
   Member

   Well, My levels are around 320x2048, so that's more than the allowed size for a texture I think. I was wondering also if I should cut them in 320x480 or 320x1024 pieces.

   Posted 2 years ago #
4. 

   riq
   Key Master

   max size on iphone pre 3gs: 1024x1024.
   max size on 3gs: 2048x2048

   do you have repetitive objects ? (trees, ground, grass, flowers, clouds, black or transparent pieces)

   if so, then I suggest using a tile map (TMX) (cheaper than rendering a big image since it consumes less bandwidth)

   otherwise splitting in 2 images is ok (320x1024).
   If you split the image in less images, lets say 4 (320x512) (and only if render the ones that you need) probably you will gain some FPS. It's chepear to render a 320x512 image than a 320x1024.

   Posted 2 years ago #
5. 

   ob1
   Member

   OK thanks, that's what I thought.

   There is nothing repetitive in the level, it's not tiled at all.

   But now I am not even sure how I am going to fit the collision map in memory.

   Posted 2 years ago #
6. 

   KOI
   Member

   I would use Ernestos method: http://groups.google.com/group/cocos2d-iphone-discuss/browse_thread/thread/f6e734e00d863f5e/6c2e8d6494f8a2ef#6c2e8d6494f8a2ef

   Posted 2 years ago #
7. 

   ob1
   Member

   @KOI: Yes I am going to use something like that. I will probably however need to downsample the collision map or something to keep memory usage down.

   Posted 2 years ago #
8. 

   KOI
   Member

   I use a seperate image with only two colors in my collision map image red and alpha. And I think this is less memory usage if not I always be willed to learn :-)

   Posted 2 years ago #

RSS feed for this topic

Reply

You must log in to post.