CCAnimate+AsymetricalStart

CCAnimate+AsymetricalStart.m

//
//  CCAnimate+AsymetricalStart.m
//  CocosAnimatioPrototype
//
//  Created by Maxim Zaks on 17.10.12.
//  Copyright (c) 2012 Maxim Zaks. All rights reserved.
//

#import "CCAnimate+AsymetricalStart.h"
#import "CCAnimation.h"

@implementation CCAnimate (AsymetricalStart)

- (CCAnimation *) shortVersion
{
	NSArray *oldArray = [animation_ frames];
        NSUInteger oldCount = [oldArray count];
        NSUInteger startFrom = arc4random() % oldCount;
	NSArray *newArray = [oldArray subarrayWithRange:NSMakeRange(startFrom, oldCount-startFrom)];
    
	CCAnimation *newAnim = [CCAnimation animationWithAnimationFrames:newArray
                                                            delayPerUnit:animation_.delayPerUnit
                                                                   loops:animation_.loops];
	
	return [[self class] actionWithAnimation:newAnim];
}

@end

CCAnimateAsymetricalStart.m

//
//  CCAnimate+AsymetricalStart.m
//  CocosAnimatioPrototype
//
//  Created by Maxim Zaks on 17.10.12.
//  Copyright (c) 2012 Maxim Zaks. All rights reserved.
//

#import "CCAnimate+AsymetricalStart.h"
#import "CCAnimation.h"

@implementation CCAnimate (AsymetricalStart)

- (CCAnimate *) shortVersion
{
	NSArray *oldArray = [animation_ frames];
        NSUInteger oldCount = [oldArray count];
        NSUInteger startFrom = arc4random() % oldCount;
	NSArray *newArray = [oldArray subarrayWithRange:NSMakeRange(startFrom, oldCount-startFrom)];
    
	CCAnimation *newAnim = [CCAnimation animationWithAnimationFrames:newArray
                                                            delayPerUnit:animation_.delayPerUnit
                                                                   loops:animation_.loops];
	
	return [[self class] actionWithAnimation:newAnim];
}

@end

UsageExample.m

// Basic usage example

[mySprite runAction:[CCSequence actions:[animation shortVersion], [CCCallBlock actionWithBlock:^{
        [mySprite runAction:[CCRepeatForever actionWithAction: animation]];
    }], nil]];