LibGDX: Particle scale

Question

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

Answer 1

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.

Answer 2

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.

Answer 3

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

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

Answer 4

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();

Answer 5

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);