CODEWITHSUNDEEP
javaandroidlibgdxparticles
Pew Labs
Pew Labs

Reputation: 809

LibGDX: Particle scale

In my game I use

static final float FRUSTUM_WIDTH = 10;
 static final float FRUSTUM_HEIGHT = 15;

So when I draw the particles they take the whole screen and are huge! So how do I scale them down to fit my needs?

//Pew Labs

Upvotes: 5

Views: 4741

Answers (5)

Feep In
Feep In

Reputation: 51

Personally, to handle my particle size depending on the user's screen, I use ScalingViewport which allows you to work at a fixed size and it'll automatically scale depending on the device'd screen size. I usually put the ScalingViewport for a Scaling.fill in its constructor; that prevents the particle from stretching and looking bad.

Upvotes: 0

Sarpe
Sarpe

Reputation: 5806

I have used the same approach as Victor but what worked for me:

    ParticleEffect effect = new ParticleEffect();
    effect.load(Gdx.files.internal("particle/version1.p"), Gdx.files.internal("particle"));
    effect.setPosition(x, .y);
    float pScale = 0.02f;
    float scaling;
    Array<ParticleEmitter> emitters = effect.getEmitters();
    for (ParticleEmitter e : emitters) {

        scaling = e.getScale().getHighMax();
        e.getScale().setHigh(scaling * pScale);

        scaling = e.getScale().getLowMax();
        e.getScale().setLow(scaling * pScale);

        scaling = e.getVelocity().getHighMax();
        e.getVelocity().setHigh(scaling * pScale);

        scaling = e.getVelocity().getLowMax();
        e.getVelocity().setLow(scaling * pScale);

        scaling = e.getSpawnHeight().getHighMax();
        e.getSpawnHeight().setHighMax(scaling * pScale);

        scaling = e.getSpawnHeight().getLowMax();
        e.getSpawnHeight().setLowMax(scaling * pScale);

        scaling = e.getSpawnHeight().getHighMin();
        e.getSpawnHeight().setHighMin(scaling * pScale);

        scaling = e.getSpawnHeight().getLowMin();
        e.getSpawnHeight().setLowMin(scaling * pScale);

        scaling = e.getSpawnWidth().getHighMax();
        e.getSpawnWidth().setHighMax(scaling * pScale);

        scaling = e.getSpawnWidth().getLowMax();
        e.getSpawnWidth().setLowMax(scaling * pScale);

        scaling = e.getSpawnWidth().getHighMin();
        e.getSpawnWidth().setHighMin(scaling * pScale);

        scaling = e.getSpawnWidth().getLowMin();
        e.getSpawnWidth().setLowMin(scaling * pScale);

        scaling = e.getXOffsetValue().getLowMax();
        e.getXOffsetValue().setLowMax(scaling * pScale);

        scaling = e.getXOffsetValue().getLowMin();
        e.getXOffsetValue().setLowMin(scaling * pScale);

        scaling = e.getYOffsetValue().getLowMax();
        e.getYOffsetValue().setLowMax(scaling * pScale);

        scaling = e.getYOffsetValue().getLowMin();
        e.getYOffsetValue().setLowMin(scaling * pScale);
    }
    effect.start();

Upvotes: 2

Viktor
Viktor

Reputation: 251

ParticleEffect pe = new ParticleEffect();
    pe.load(Gdx.files.internal("data/particle/particle.p"), Gdx.files.internal("data/particle"));
    pe.setPosition(x, y);

    float pScale = 0.2f;

    float scaling = pe.getEmitters().get(0).getScale().getHighMax();
    pe.getEmitters().get(0).getScale().setHigh(scaling * pScale);

    scaling = pe.getEmitters().get(0).getScale().getLowMax();
    pe.getEmitters().get(0).getScale().setLow(scaling * pScale);

    scaling = pe.getEmitters().get(0).getVelocity().getHighMax();
    pe.getEmitters().get(0).getVelocity().setHigh(scaling * pScale);

    scaling = pe.getEmitters().get(0).getVelocity().getLowMax();
    pe.getEmitters().get(0).getVelocity().setLow(scaling * pScale);

Upvotes: 25

Dominik Bucher
Dominik Bucher

Reputation: 1509

Either you use the particle editor (to be honest I don't think it's a good idea for sizing the particles, as you mentioned the particles won't get too small (for anything else I really recommend it)) or you just open the particle effect file. It should be generated by the editor or you can copy it from the examples. In this file search the fields below:

- Scale - 
lowMin: 0.0
lowMax: 0.0
highMin: 0.6
highMax: 0.6
relative: false
scalingCount: 1
scaling0: 1.0
timelineCount: 1
timeline0: 0.0

Adjust the highMin and highMax as needed.

Upvotes: 6

Shivan Dragon
Shivan Dragon

Reputation: 15219

Well, you can use the particle editor and adjust the size there:

http://www.badlogicgames.com/wordpress/?p=1255

Upvotes: 2

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