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    <p>FIXED</p> <p>I was setting the number of particles to 0 as a way to pause particles animation. It works on the simulator but causes a bug on the device.</p> <p>Instead of changing the number of particles, I've created a function to change the _life and _lifeVar variables. Now it is working just fine. See the code below:</p> <p><strong>Particle System Interface</strong></p> <pre><code>@interface CCParticleMainDrill : CCParticleSystemQuad { float _saved_life, _saved_lifeVar; } // needed for BridgeSupport -(void) SetActive:(BOOL) b; -(id) init; @end </code></pre> <p><strong>Particle System Implementation</strong></p> <pre><code>@implementation CCParticleMainDrill -(id) init { return [self initWithTotalParticles:100]; } -(void) SetActive:(BOOL) b { if (b) { _life = _saved_life; _lifeVar = _saved_lifeVar; } else { _saved_life = _life; _saved_lifeVar = _lifeVar; _lifeVar = 0; _life = 0; } } -(id) initWithTotalParticles:(NSUInteger) p { if( (self=[super initWithTotalParticles:p]) ) { // _duration _duration = kCCParticleDurationInfinity; // Gravity Mode self.emitterMode = kCCParticleModeGravity; // Gravity Mode: gravity self.gravity = ccp(0,100); // Gravity Mode: speed of particles self.speed = 400; self.speedVar = 230; // Gravity Mode: radial self.radialAccel = 0; self.radialAccelVar = 0; // Gravity Mode: tagential self.tangentialAccel = 0; self.tangentialAccelVar = 0; ccBlendFunc ccbf = {GL_DST_COLOR,GL_DST_ALPHA};//{GL_SRC_ALPHA,GL_SRC_ALPHA_SATURATE}; self.blendFunc = ccbf; // _angle _angle = 90; _angleVar = 60; // emitter position //CGSize winSize = [[CCDirector sharedDirector] winSize]; self.positionType = kCCPositionTypeFree; self.position = ccp(0, 0);// ccp(winSize.width/2, winSize.height/2); self.posVar = ccp(3, 0); // _life of particles _life = 0.06; _lifeVar = 0.1; // size, in pixels _startSize = 5.0f; _startSizeVar = 1.0f; _endSize = 3.0f; _endSizeVar = 0.00f; // emits per second _emissionRate = _totalParticles/_life; // color of particles _startColor.r = 0.25f; _startColor.g = 0.14f; _startColor.b = 0.07f; _startColor.a = 1.0f; _startColorVar.r = 0.0f; _startColorVar.g = 0.0f; _startColorVar.b = 0.0f; _startColorVar.a = 0.0f; _endColor.r = 0.28f; _endColor.g = 0.19f; _endColor.b = 0.12f; _endColor.a = 0.30f; _endColorVar.r = 0.0f; _endColorVar.g = 0.0f; _endColorVar.b = 0.0f; _endColorVar.a = 0.0f; NSString *path = [[NSBundle mainBundle] pathForResource:@"particle" ofType:@"png"]; self.texture = [[CCTextureCache sharedTextureCache] addImage: path]; _saved_life = _life; _saved_lifeVar = _lifeVar; // additive self.blendAdditive = YES; } return self; } @end </code></pre> <p><strong>Adding Particle to Scene</strong></p> <pre><code>-(id) init { Armor = [CCSprite spriteWithFile:@"player.png"]; Armor.position = ccp(16, 16); [self addChild:Armor]; DrillParticles = [CCParticleMainDrill node];//[CCParticleSmoke node];// [DrillParticles setPosition:ccp(Armor.boundingBox.size.width/2, 0)]; //[DrillParticles setTotalParticles:0]; //BUGGED CODE [Armor addChild:DrillParticles z:INT_MAX]; [DrillParticles SetActive:NO]; } -(void) StopAnimation { [DrillParticles SetActive:NO]; //[DrillParticles setTotalParticles:0]; // BUGGED CODE } -(void)StartAnimation { [DrillParticles SetActive:YES]; //[DrillParticles setTotalParticles:100]; // BUGGED CODE } </code></pre>
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