How can i set delay for each frame in an animation?

[iwind]

I am using cocos2d library, and now i have a question, how can i set delay for each frame in an animation? In cocos2d, you can only set a duration on animation, but i want to let different frame stay different time, for instance,
frame1 stay 0.1 second
frame2 stay 0.2 second
frame3 stay 0.15 second

How can i do this?

Another question, can the frame be a sprite? Because i want to add more than one images to each frame.

Thanks for help advanced.

[Jason Rogers]

hi
I would go for a system like this

1) store the delay you want to apply (I would put in the detail of you custom frame)
2)do a for(MyCustomView *inst in TheCollectionThatGroupsMyListOfElement)
in which you can happely launch a timer that will animate you View and set the delay of the timer to the value stored in you custom view

Timer Programming Topics for Cocoa: Using Timers

I don't know what you mean by sprite ut if you mean a composed view (icon + text + another iamge etc

then just create a custom UIView in wich you build your custom display

i did like that to create a image with some text underneath

hope it helped

jason

[iwind]

Originally Posted by Jason Rogers

hi
I would go for a system like this

1) store the delay you want to apply (I would put in the detail of you custom frame)
2)do a for(MyCustomView *inst in TheCollectionThatGroupsMyListOfElement)
in which you can happely launch a timer that will animate you View and set the delay of the timer to the value stored in you custom view

Timer Programming Topics for Cocoa: Using Timers

I don't know what you mean by sprite ut if you mean a composed view (icon + text + another iamge etc

then just create a custom UIView in wich you build your custom display

i did like that to create a image with some text underneath

hope it helped

jason

Thank you for help. The "sprite" is a word in cocos2d library, you can check it out here:
cocos2d-iphone - Google Code

A sprite can flip, scale, move and do other actions, and it can have some children(other sprites).

I want to use the library to improve my development process, it seems that i need to implement sprite animation myself.But i just think if there is a way to do it with cocos2d Animation class.

NSTimer class is helpful to me, thanks.

[Jason Rogers]

I read about coco2d really quickly (I'll need to do some opengl in in a couple of weeks so I'm reading up)

if your using coco2d as your main framework you might want to check out there version of the timer

BestPractices - cocos2d-iphone - cocos2d for iPhone best practices - Google Code

    * Try not to use Cocoa's NSTimers. Instead use cocos2d's own scheduler.
    * If you use cocos2d scheduler, you will have:
          o automatic pause/resume.
          o when the Layer (Scene, Sprite, CocosNode) enters the stage the timer will be automatically activated, and when it leaves the stage it will be automatically deactivated.
          o Your target/selector will be called with a delta time

            /**********************************************************/
            // OK OK OK OK OK
            /**********************************************************/
            -(id) init
            {
                    if( ! [super init] )
                            return nil;

                    // schedule timer
                    [self schedule: @selector(tick:)];
                    [self schedule: @selector(tick2:) interval:0.5];

                    return self;
            }

            -(void) tick: (ccTime) dt
            {
                    // bla bla bla
            }

            -(void) tick2: (ccTime) dt
            {
                    // bla bla bla
            }

            /**********************************************************/
            // BAD BAD BAD BAD
            /**********************************************************/
            // Why BAD ?
            // You can't pause the game automagically.
            -(void) onEnter
            {
                    [super onEnter];
                    timer1 = [NSTimer scheduledTimerWithTimeInterval:1/FPS target:self selector:@selector(tick1) userInfo:nil repeats:YES];
                    timer2 = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(tick2) userInfo:nil repeats:YES];
            }
            -(void) onExit
            {
                    [timer1 invalidate];
                    [timer2 invalidate];
                    [super onExit];
            }
            -(void) tick
            {
                    // bla bla bla
            }

            -(void) tick2
            {
                    // bla bla bla
            }

it seams to add a few insteresting functionalities that you need when doing 3D programing and you dont want to dig in the code to much.

otherwise as I guessed a sprite is a UIView with extra functionalities ^^
I tend at the moment to try and write the low level stuff by hand and get my own framework of classes and functions going but that a lot of work

maybe if I get round to coco2D you can help me out

best regards

jason

[iwind]

The schedule and unschedule only work on classes who inherited from CocosNode, that make me very sad, even my own class interface inherited CocosNode:

@interface KAnimation : CocosNode {

}
@end

then i try to schedule a selector like this:

[self schedule:@selector(_playFrame:) interval:1];

Build and run the application, i found the selector _playFrame: never be called.

I think cocos2d framework still need to be improved for more easy-to-use.

[rahul7star]

how to animate a sequence in sprite sheet lets say 1 image is at 0,100 and other is at 10,100 in same sprite sheet