How can I delete particles when...

[totallybueno]

Hi there,

so here´s my question... I have a game, you´re under the water and at some point you launch some particles (bubbles).

 

What I want is to deleted those particles when they arrive to de surface but I don´t know how to do that, I don´t know if I should extend de particle class or if there´s another method.

 

Note: I can´t use checkWorldBounds because not all the stage (world) is water.

 

 

 

[valueerror]

is the water surface always on the same y position ? if so you could just check the current y position of the particles (if thats possible) and remove them ..

 

or you create a sensor rectangle that resides on top of the water and on collision with this rectangle you remove the particles?

[lewster32]

Something like this will do the trick:

function update() {  emitter.forEachAlive(function(bubble) {    if (bubble.y < surfaceY) {      bubble.kill();    }  });}

[totallybueno]

Thanks for the answer valueerror, but I just fixed it this way:

this.game.world.bounds = new Phaser.Rectangle(0,100, this.game.world.width, this.game.world.height);

and

emitter.forEach(function(particle){     particle.checkWorldBounds = true;     particle.outOfBoundsKill = true;}, this);

[totallybueno]

Thanks lewster32, that´s closer to what I did

[lewster32]

Not sure if you should be manually changing the world bounds like that - it may have other repercussions, as it should normally not be smaller than the screen. Also, checking world bounds is quite a bit less efficient as bounds checks have to be done each time. As the particles are small and evenly sized, just checking their y property should be enough to get what you want.

[totallybueno]

Ops, that´s true... I´m gonna change it this way.

 

Thanks again