White fireworks particles « cocos2d for iPhone

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White fireworks particles

(8 posts) (3 voices)

Started 1 year ago by finder39
Latest reply from finder39

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I am trying to make the fireworks particle effect all white or offwhite (kinda the rain particle color) instead of multicolored but i cannot seem to do it

this is the code i am trying with no success

there is obviously some other code in here but this is my whole function i call. the color is different but just seems to be a little off from the original colors, nothing near my goal.

+(void) createExplosionSpaceX: (float) x y: (float) y inParent: (CCNode*) parentNode
{
	CGSize winSize = [[CCDirector sharedDirector] winSize];
	CCParticleSystem *emitter;
	emitter = [[CCParticleFireworks alloc] init];
	emitter.texture = [[CCTextureCache sharedTextureCache] addImage:@"stars.png"];
	y = -30;
	int i = 1;
	while (true)
	{
		if (x < (winSize.width+15/2)/5*i) {
			x = (winSize.width+15/2)/5*i-((winSize.width+15/2)/5/2);
			break;
		}
		i++;
	}

	// color of particles
	emitter.startColor.r = 1.0f;
	emitter.startColor.g = 1.0f;
	emitter.startColor.b = 1.0f;
	emitter.startColor.a = 1.0f;
	emitter.startColorVar.r = 0.0f;
	emitter.startColorVar.g = 0.0f;
	emitter.startColorVar.b = 0.0f;
	emitter.startColorVar.a = 0.0f;
	emitter.endColor.r = 1.0f;
	emitter.endColor.g = 1.0f;
	emitter.endColor.b = 1.0f;
	emitter.endColor.a = 0.0f;
	emitter.endColorVar.r = 0.0f;
	emitter.endColorVar.g = 0.0f;
	emitter.endColorVar.b = 0.0f;
	emitter.endColorVar.a = 0.0f;

	// gravity
	emitter.gravity.x = 0;
	emitter.gravity.y = -90;

	// angle
	emitter.angle = 90;
	emitter.angleVar = 20;

	// radial
	emitter.radialAccel = 0;
	emitter.radialAccelVar = 0;

	// speed of particles
	emitter.speed = 180;
	emitter.speedVar = 50;

	// life of particles
	emitter.life = 3.5f;
	emitter.lifeVar = 1;

	// emits per frame
	emitter.emissionRate = emitter.totalParticles/emitter.life;

	// size, in pixels
	emitter.startSize = 8.0f;
	emitter.startSizeVar = 2.0f;
	emitter.endSize = kParticleStartSizeEqualToEndSize;

	// additive
	emitter.blendAdditive = NO;

	//NSLog([NSString stringWithFormat:@"y: %f", y]);
	emitter.position = ccp(x,y);
	emitter.duration = 3;
	emitter.autoRemoveOnFinish = YES; // this removes/deallocs the emitter after its animation
	[parentNode addChild:emitter];
}

Posted 1 year ago #

finder39
Member

anyone have any idea how to do this?

Posted 1 year ago #
finder39
Member

so no one does?

Posted 1 year ago #
jeff8500
Member

Your colors look right, so I can't really see anything wrong. If I were you, I'd try loading the texture after setting the colors, though. When you look at the particle example files (the files that contain objects like CCParticleFireworks), you'll notice that they do it in the exact opposite order you do (they set the texture last).

Posted 1 year ago #
finder39
Member

i tried that and still have same result, here is a picture.

Posted 1 year ago #
mobilebros
Moderator
For some reason I didn't think you could do that syntax:
```
emitter.startColor.r = 1.0f;
```
... in fact a quick test shows I can't; how did this compile?
Posted 1 year ago #
finder39
Member

it compiles fine, the weird part is that i changed the gravity too, in the x way, and it had no effect either so something is behaving weirdly

Posted 1 year ago #

finder39
Member

i got it to work but with a lot more code than i wanted. I had to create my own particle class.

here is a photo though it looks a little off it looks better in the game

in the .h

+ (void)createExplosionSpaceX:(float)x y:(float)y inParent:(CCNode *)parentNode;
@end

//! A fireworks particle system
@interface CCParticleFireworksSpace : CCPointParticleSystem
{
}
@end

and in the .mm

+(void) createExplosionSpaceX: (float) x y: (float) y inParent: (CCNode*) parentNode
{
	CGSize winSize = [[CCDirector sharedDirector] winSize];
	CCParticleSystem *emitter;
	emitter = [[CCParticleFireworksSpace alloc] init];
	y = -30;
	int i = 1;
	while (true)
	{
		if (x < (winSize.width+15/2)/5*i) {
			x = (winSize.width+15/2)/5*i-((winSize.width+15/2)/5/2);
			break;
		}
		i++;
	}

	//NSLog([NSString stringWithFormat:@"y: %f", y]);
	emitter.position = ccp(x,y);
	emitter.duration = 3;
	emitter.autoRemoveOnFinish = YES; // this removes/deallocs the emitter after its animation
	emitter.texture = [[CCTextureCache sharedTextureCache] addImage:@"stars.png"];
	[parentNode addChild:emitter];
}

@end

//
// ParticleFireworks
//
@implementation CCParticleFireworksSpace
-(id) init
{
	return [self initWithTotalParticles:1500];
}

-(id) initWithTotalParticles:(int)p
{
	if( !(self=[super initWithTotalParticles:p]) )
		return nil;

	// duration
	duration = -1;

	// gravity
	gravity.x = 0;
	gravity.y = -90;

	// angle
	angle = 90;
	angleVar = 20;

	// radial
	radialAccel = 0;
	radialAccelVar = 0;

	// speed of particles
	speed = 180;
	speedVar = 50;

	// emitter position
	CGSize winSize = [[CCDirector sharedDirector] winSize];
	self.position = ccp(winSize.width/2, winSize.height/2);

	// life of particles
	life = 3.5f;
	lifeVar = 1;

	// emits per frame
	emissionRate = totalParticles/life;

	// color of particles
	startColor.r = 1.0f;
	startColor.g = 1.0f;
	startColor.b = 1.0f;
	startColor.a = 1.0f;
	startColorVar.r = 0.0f;
	startColorVar.g = 0.0f;
	startColorVar.b = 0.0f;
	startColorVar.a = 0.0f;
	endColor.r = 0.1f;
	endColor.g = 0.1f;
	endColor.b = 0.1f;
	endColor.a = 0.0f;
	endColorVar.r = 0.0f;
	endColorVar.g = 0.0f;
	endColorVar.b = 0.0f;
	endColorVar.a = 0.0f;

	// size, in pixels
	startSize = 8.0f;
	startSizeVar = 2.0f;
	endSize = kParticleStartSizeEqualToEndSize;

	self.texture = [[CCTextureCache sharedTextureCache] addImage: @"stars.png"];

	// additive
	blendAdditive = NO;

	return self;
}
@end

Posted 1 year ago #

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