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 the whole screen and are huge! So how do I scale them down to fit my needs?

//Pew Labs

score 25 · Answer 1 · answered Jun 18 '12 at 07:32

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);

score 6 · Accepted Answer · answered Mar 14 '12 at 22:00

6

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.

answered Mar 14 '12 at 22:00

Dominik Bucher

1,509
13
16

This and all the others not working with the latest library, any help? – lacas Jun 26 '17 at 07:37
Personally, I haven't used libgdx in a while, sorry :(. – Dominik Bucher Jun 26 '17 at 12:21

score 2 · Answer 3 · answered Nov 30 '15 at 18:58

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();

score 2 · Answer 4 · answered Mar 14 '12 at 19:07

2

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

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

answered Mar 14 '12 at 19:07

Shivan Dragon

15,004
9
62
103

score 0 · Answer 5 · edited Mar 09 '20 at 13:20

0

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.

edited Mar 09 '20 at 13:20

Das_Geek

2,775
7
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answered Mar 07 '20 at 20:14

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LibGDX: Particle scale

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