Spawning particles at certain position

[thomask]

Title says it all, I'd like to spawn some vanilla particles (those fire looking ones from spawners) at a certain coordinate.

This is for adding a visual effect around an arrow as it flies, so I was thinking I could spawn particles at the arrow's coordinate position at every tick. 

[Ugdhar]

it looks like the particles for the spawner are created in the net.minecraft.world.spawner.AbstractSpawner class. Check out how they do it there, in the tick() method as far as I can tell.

 

Vanilla classes are a good reference for a ton of things

Edited June 24, 2020 by Ugdhar

[poopoodice]

world.addParticle

[thomask]

6 hours ago, Ugdhar said:

it looks like the particles for the spawner are created in the net.minecraft.world.spawner.AbstractSpawner class. Check out how they do it there, in the tick() method as far as I can tell.

 

Vanilla classes are a good reference for a ton of things

  

4 minutes ago, poopoodice said:

world.addParticle

 

Hey, this is how I'm trying to do it so far. 

    @Override
    public void tick() {
        super.tick();
        this.world.addParticle(ParticleTypes.FLAME, this.getPosX(), this.getPosY(), this.getPosZ(), 0.0, 0.0, 0.0);
        System.out.println("DEBUG: arrow tick");
    }

My full class for my arrow: https://pastebin.com/41jCRgYu

The particle's aren't showing, but the debug message is printing.

Also, I'm not really sure what the particle speed values mean? On AbstractSpawner they're all set to 0 so that's what I did.

Edited June 25, 2020 by thomask

[Speedy1000]

This is the way I've been able to do it, I found it somewhere in the vanilla code and it's worked ever since.

 

In the tick() method you could have something like...

 

if (!this.world.isRemote()) {
    //ANY POSITION YOU WANT HERE
    Vec3d pos = this.creature.getPositionVec();
    //SPAWN THE PARTICLE
    ((ServerWorld) this.world).spawnParticle(ParticleTypes.HEART, pos.getX(), pos.getY(), pos.getZ(), 1, 0, 0, 0, (double) 0.01F);
    
}

 

Another example is the Tamable entity, how when you right-click it you get 7 hearts randomly float up

 

for(int i = 0; i < 7; ++i) {
   double d0 = this.rand.nextGaussian() * 0.02D;
   double d1 = this.rand.nextGaussian() * 0.02D;
   double d2 = this.rand.nextGaussian() * 0.02D;
   this.world.addParticle(ParticleTypes.HEART, this.getPosXRandom(1.0D), this.getPosYRandom() + 0.5D, this.getPosZRandom(1.0D), d0, d1, d2);
}

 

You would have to find the particle your looking for in ParticleTypes i guess. And I think your position should be the blocks center position plus a random variation of -0.5 to 0.5 on every axis

[TheGreyGhost]

Howdy

 

This working example of particles might be helpful

https://github.com/TheGreyGhost/MinecraftByExample/tree/master/src/main/java/minecraftbyexample/mbe50_particle

-TGG