cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   onedayitwillmake
   Member

   I have a simple particle implementation which extends ParticleExplosion, however the particles always fade to white on the device.
   They appear fine in the simulator... I asked this question on here before but I received no responses.

   All the examples of particles that come with Cocos2D use a dark background, so maybe this is not apparent then.
   Here is how i'm initializing the particles

   ParticleSystem* p = [[ParticleExplosion alloc] initWithTotalParticles:15];
   	p.position = ccp(self.position.x + 10, self.position.y += 15);
   
   // in the init called above
   startColor.r = 1.0f;
   	startColor.g = 0.6f;
   	startColor.b = 0.6f;
   	startColor.a = 1.0f;
   	startColorVar.a = 0.1f;
   	endColor.r = 1.0f;
   	endColor.g = 0.6f;
   	endColor.b = 0.6f;
   	endColor.a = 0.2f;
   	endColorVar.a = 0.2f;
   	self.blendAdditive = NO;

   This is the image I'm using for the particles ( ), I simply want to color it red, then fade its opacity to zero.
   Instead it turns full white then pops out of view in a jarring way.

   It's really the only thing left in the completion of our little game, so any help would be appreciated

   Posted 1 year ago #
2. 

   randomtruth
   Member

   Why not have the image red to begin with, then have the end color set too...
   endcolor.r = 1.0f;
   endcolor.g = 1.0f;
   endcolor.b = 1.0f;
   endcolor.a = 0.0f;
   encolorVar.a = 0.0f;

   Posted 1 year ago #
3. 

   onedayitwillmake
   Member

   I was goign to have various colors for the heart pieces, however at this point - i think i will just do that.

   I have a feeling it's related to dropping the alpha of the particle every tick when the particles are not additive, Let you know how it goes :)

   Posted 1 year ago #
4. 

   onedayitwillmake
   Member

   Just tried it, believe it or not - the particle simply turns white. It does not alpha out at all, I'm using cocos 8.2 release in case that matters.
   I'm one or two days away from submitting the game, and it'd be a shame to have white heart particles in it although i'm willing to do so if that's all there is too it.

   (again to note, they work fine in the simulator)
   

   Posted 1 year ago #
5. 

   SwizzerSweet
   Member

   Are you talking about this?

   http://j.imagehost.org/view/0188/IMG_0014

   Because I'm using additive blend mode by design, you might want to turn that off im guessing

   Posted 1 year ago #
6. 

   onedayitwillmake
   Member

   I have additive mode turned off :(

   startColor.r = 1.0f;
   	startColor.g = 1.0f;
   	startColor.b = 1.0f;
   	startColor.a = 1.0f;
   	startColorVar.a = 0.0f;
   	endColor.r = 1.0f;
   	endColor.g = 1.0;
   	endColor.b = 1.0f;
   	endColor.a = 0.0f;
   	endColorVar.a = 0.9f;
           self.blendAdditive = NO;

   Posted 1 year ago #
7. 

   randomtruth
   Member

   Try not adjusting the alpha using end color and instead use a fadeto action on the particle emiter.
   

   id fade = [FadeTo actionWithDuration:1 opacity:0];
   [self runAction:fade];

   Posted 1 year ago #

RSS feed for this topic

Reply

You must log in to post.