Question

I am doing a game, and I got only 1 final problem. Its that when the game create an enemy the FPS slow to 40 or 20. Depends if it creates 1 or 2 enemies.

NSMutableArray *walkAnimFrames = [NSMutableArray array];
    for(int i = 1; i <= 3; ++i) {
        [walkAnimFrames addObject:
         [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:
          [NSString stringWithFormat:@"laser_%d.png", i]]];
    }

    CCAnimation *walkAnim = [CCAnimation animationWithFrames:walkAnimFrames delay:0.12f];    
    CCSprite *laser = [CCSprite spriteWithSpriteFrameName:@"laser_1.png"];

    int tempY = (arc4random() % ((int)(300 - laser.boundingBox.size.height))) + laser.boundingBox.size.height;
    float tempRot = (arc4random() % 30) + 1;
    int sign = (arc4random() % 2) - 1;
    if (sign < 0) {
        tempRot *= -1;
    }

    laser.tag = 2;

    laser.position = ccp(650, tempY);
    laser.rotation = CC_RADIANS_TO_DEGREES(tempRot);
    CCAction *walkAction = [CCRepeatForever actionWithAction:
                            [CCAnimate actionWithAnimation:walkAnim restoreOriginalFrame:YES]];
    [laser runAction:walkAction];
    [spriteSheet addChild:laser];

    b2BodyDef spriteBodyDef;
    spriteBodyDef.type = b2_dynamicBody;
    spriteBodyDef.position.Set(laser.position.x/PTM_RATIO, 
                               laser.position.y/PTM_RATIO);
    spriteBodyDef.userData = laser;
    b2Body *spriteBody = world->CreateBody(&spriteBodyDef);

    [[GB2ShapeCache sharedShapeCache] addShapesWithFile:@"laserBody.plist"];
    [[GB2ShapeCache sharedShapeCache] addFixturesToBody:spriteBody forShapeName:@"laser_1"];
    [laser setAnchorPoint:[[GB2ShapeCache sharedShapeCache] anchorPointForShape:@"laser_1"]];

    //pixeles recoridos/velocidad del move actual
    float timeAnim = 800/(60*move);
    [laser runAction:[CCSequence actions:
                      [CCMoveBy actionWithDuration:timeAnim position:ccp(-800, 0)],
                      [CCCallFuncN actionWithTarget:self selector:@selector(obstaclesDone:)],
                      nil]];    

I am using Physic Editor, to create the shape. After it create. The game works fine in 60 fps. But only in the iPhone. In my iMac works perfectly.

What could do I do to create it without loosing fps. Maybe in the second processor. Or another thread?

Thanks 🙂

Answer 1

What is the size and quality of the textures you are using? It could be that too much memory is required to create sprite instances making it difficult to keep a high frame rate constantly changing the positions of those sprites. You could also try profiling with Instruments to see what is eating up your processor cycles.