I want to thank those who help me in advance,

 

so i posted a few days ago except i worded my post oddly and none understood what i was trying to do, i apologize for that, this is what i was trying to say;

 

I want to make particles spawn when you are holding an item, how can i accomplish this?

Is this 1.7.10 or 1.8 you're trying to do this in?

1.7.10

 

and i tried that already, i couldn't get it to work, could you show me some sort of example code?

i tried messing around with

 

this.onUpdate();

 

 

 

and...

 

public void onUpdate(World world, double x, double y, double z, double velX, double velY, double velZ) {

 

world.spawnParticle("portal", x + 1, y, z + 1, 1.0D, 1.0D, 1.0D);

   

also...

 

 

public void randomDisplayTick(World world, int x, int y, int z, Random random);

 

    if (random.nextInt(10) == 0)

    {

    world.spawnParticle("portal", (double)((float)x + random.nextFloat()), (double)((float)y + 1.1F), (double)((float)z + random.nextFloat()), 0.0D, 0.0D, 0.0D);

    }

randomDisplayTick is for Blocks. And those are not the parameters that onUpdate takes. Learn how to override a method. You cannot just change the parameters and expect Minecraft to magically call your method with the correct values.

I agree.

 

Are you in eclipse? Because in eclipse it shows that green override symbol.

Here is the correct code.

public void onUpdate(ItemStack p_77663_1_, World world, Entity p_77663_3_, int p_77663_4_, boolean p_77663_5_) {
	EntityPlayer player=(EntityPlayer) p_77663_3_;
	if(player.getCurrentEquippedItem().getItem().equals(this)){
		 world.spawnParticle("portal", player.posX + 1, player.posY, player.posZ, 1.0D, 1.0D, 1.0D);
	}
}

private Random rand = new Random();
    @Override
    public void onUpdate(ItemStack is, World world, Entity ent, int i, boolean bool)
    {
    	if(ent != null && ent instanceof EntityPlayer && bool)
    	{
    		EntityPlayer p = (EntityPlayer)ent;
    			world.spawnParticle("portal", p.posX, p.posY, p.posZ, rand.nextGaussian(), rand.nextGaussian(), rand.nextGaussian());
    	}
    }

This sends all particles to your head.

 

private Random rand = new Random();
    @Override
    public void onUpdate(ItemStack is, World world, Entity ent, int i, boolean bool)
    {
    	if(ent != null && ent instanceof EntityPlayer && bool)
    	{
    		EntityPlayer p = (EntityPlayer)ent;
    			world.spawnParticle("portal", p.posX, p.posY-rand.nextInt(2), p.posZ, rand.nextGaussian(), rand.nextGaussian(), rand.nextGaussian());
    	}
    }

This sends particles to random points on your body(height wise).

@starwarsmace:

 

a) Don't rely on it being a player, check with instanceof

b) the "is current item" check is already done for you, it's the boolean parameter.

 

a)Youre right.

b) oh yeah. That make sense.

 

Corrected code

 

public void onUpdate(ItemStack p_77663_1_, World world, Entity entity, int p_77663_4_, boolean flag) {
	if(flag){
		 world.spawnParticle("portal", entity.posX + 1, entity.posY, entity.posZ, 1.0D, 1.0D, 1.0D);
	}
}

The problem with doing 1.0D instead of a random double or Gaussian is that the particles will all spawn in one spot and fly into the players head instead spawning around the player and going into random spots.  In basic though, that is fine code to get started.