cocos2d for iPhone

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

1. 

   FBryant
   Member

   I have a large TMXTileMap (100x100) with tile size (24x24). The map is clearly dropping FPS to 30, when I scroll it offscreen it jumps back to 60.

   I searched old threads and found one which suggested I split my tilemap into seperate layers, making each layer visible only when in view.

   If this is the best practice I will go ahead, quick question though:

   I was planning to split my map into 4 square layers, but when viewing the middle I would need to make all 4 visible (30FPS). Can anyone suggest a good structure?

   Is it best to do it in strips or squares? I'm guessing there is a drawback in makng too many layers.

   Posted 1 year ago #
2. 

   araker
   Moderator

   A 100 x 100 map should still be at 60 fps, are you testing on the device, in release mode?

   I recommend squares instead of strips and split it into 16 layers instead 4. That way a maximum of 4 layers will only be 50 x 50 tiles. There is a small performance penalty indeed, each sublayer will have it's own draw call, 4 instead of 1 in this case.

   Posted 1 year ago #
3. 

   FBryant
   Member

   30fps on simulator on release mode.

   will give the sqaures thing a try, thanks!

   Posted 1 year ago #
4. 

   skyhawk
   Member

   sounds about right. simulator is no way reflective of performance on device

   Posted 1 year ago #
5. 

   FBryant
   Member

   device is faster than simulator for tileMaps?

   Posted 1 year ago #
6. 

   itlgames
   Moderator

   Simulator is far more faster for everything, think the simulator uses your computer resources. If you get 30fps on the simulator, expect much less on the device.

   Posted 1 year ago #
7. 

   araker
   Moderator

   Don't forget that the simulator is just a simulation and therefore irrelevant for measuring performance. The device has different hardware so the performance can be very different. In most cases I've seen the device is actually faster than the simulator.

   Posted 1 year ago #
8. 

   FBryant
   Member

   contradicting opinions!

   Posted 1 year ago #
9. 

   manucorporat
   Member

   device is faster because the rendering is accelerated by hardware (opengl).
   and the Iphone simulator uses "Apple render engine"

   ok, if you have a super computer with a super CPU, maybe the simulator is faster.

   For example,
   my game in simulator:
   15FPS
   in device:
   60FPS

   Posted 1 year ago #
10. 

    itlgames
    Moderator

    Maybe it depends on what the game relys on and where the bottle neck is (if any), on my case it's too much code/logic to run every frame, and I can see the simulator running 60fps no problem but down to 20 or 30 fps some times on the device. Maybe if the game bottle neck is the rendering, maybe is different.

    Keep in mind that under the simulator we have the computer CPU that by far is going to be faster than any CPU device, I don't think you need a super machine, any Intel core duo should be more than enough, and since you need a Intel based machine to generate the apps...

    One thing we all agree is that the simulator is irrelevant for measuring performance.

    Posted 1 year ago #
11. 

    itlgames
    Moderator

    I believe the iPhone 4 CPU is about 800mhz (correct me please if I'm wrong), and my MacBook pro is 2.4GHz. I don't think the simulator simulates the CPU cycle. But I could be wrong! Just my experience.

    Posted 1 year ago #
12. 

    araker
    Moderator

    Our opinions aren't contradicting, they both prove the point that the performance on the simulator says nothing about the performance on the device.

    Posted 1 year ago #
13. 

    itlgames
    Moderator

    @FBryant, if I were you, I would do something a bit more complex but flexible, like displaying only the tiles on the screen, maybe add a few off screen and then dynamically add tiles when you scroll, maybe in this way, you are not limited to a map size, you could use any map size you like. If the tiles to add are using a texture already used, it shouldn't be much delay adding. Just an idea.

    Posted 1 year ago #
14. 

    FBryant
    Member

    I'll look into it mate. Thanks to all.

    Posted 1 year ago #

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