EnterFrame vs Delta Time(Game Loop)

venkcauk

Hi All,

I am a flash game developer trying to migrate to objective-c. I feel like home when I started to work in sparrow framework. Thanks for sparrow team to give this framework.

My question is currently Im using enterframe in my game which I am using as a game loop.

Q1: How many enterframes are good to use in game?
Q2: Please tell me about how enterframe and render function are wokring in this framework?
Q3: Since Im using only one enterframe shall I replace this with game loop(delta time) using timer?
Help me big friends.

Regards,
Venkatesh S

Jonkel

Q1: If you're making an object that needs a enterframe, then do it. The function itself isn't performance heavy, it's more what you do in it.

Q2: Render functions per se aren't really used. Objects are being added as children to SPDisplayObjectContainers(SPSprite being the main one) and then the rendering is done automatically.
Unless you're doing something very specific.
EnterFrames subscribed to inside each object.

Q3:EnterFrame functions takes in a SPEnterFrameEvent which already contains passedTime, which is the equivalent of delta time.

venkcauk

Hi Jonkel, Thank you very much for the fast reply.

Another question in ENETRFRAME, if I add two enterframe(or touch) listener for same object & function name how many times the enterframe will get called?

Regards,
Venkatesh S

Jonkel

I haven't tested this myself but from looking at the code in SPEventDispatcher it looks like you would be calling it twice on that object.

(Not entirely sure on this, however)

You can avoid calling it double by checking if an object hasEventListenerForType: though.

venkcauk

Yes, we can even check hasEventListenerForType: inside addEventListener: for multiple listener. if hasEventListenerForType: is true then we return without adding any listener for object in SPEventDispatcher class.

Regards,
Venkatesh S