Particle system problem

Help & Support
1

Hi gyus.
I’m trying to learn how to use Particle System and i need some help.
Please, check this project.
When a player is loaded, press C and fireball appears.
I don’t know why, but the first time you cast fireball the game “freezes” for a moment. Is there a way to avoid it?

Also i want to ask about performance with particle systems.
What should i pay attention to if i want my game works fast and particles looks great? I think particles count and emission rate are the most important parameters influence of game performance.
Thanks in advance.

2

As the entity is disabled on launch, the components don’t get initialised until it is enabled for the first time which may mean some shader compilation, hence the frame drop. (@dave should know more). To get around this, you can have it enabled on start of the application (out of the camera view) and disable it on postInitialize.

On a side note, when you clone an entity, you need to give it a parent otherwise it shouldn’t be shown. I don’t know how it’s working now but you should change the Paladin.prototype.castSpell to:

Paladin.prototype.castSpell = function(spell) {
    if (spell == 'fireball') {
        var firebalEntity = this.app.root.findByName('fireball').clone();  
        this.app.root.addChild(firebalEntity);
        firebalEntity.setLocalPosition(0, 1.716, -1);
        firebalEntity.enabled = true;
        firebalEntity.script.movingSkill.setTargetPos(new pc.Vec3(0, 1.716, -10));
    }
};
3

I see. Thanks for the info.

4

I’ve just tried to use ur work around:

Network.prototype.postInitialize = function() {
    this.initializeEffects(['fireball', 'explosion']);
};

Network.prototype.initializeEffects = function(effects) {
    for (i = 0; i < effects.length; i++) {        
        this.app.root.findByName(effects[i]).enabled = false;
    }
};

Particles are enabled by default.
And still the problem remains.

5

I see this:

Looks OK to me. What’s the problem exactly?

6

The first time the knight casts fireball game freezes for a moment. After that everything is ok.