Spawn entities with a item

[SargeantPotato14]

So I created the new item and what not, but I have not figured out how to spawn per say a fireball on right click. If anyone has an idea please post.

[Busti]

This will go into your item class...

 

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
        world.spawnEntityInWorld(new YourEntityClass());
}

 

EDIT: Have a look at EntityEgg or ItemEgg if you want to know how they solve the block detection. (raytrace)

[SargeantPotato14]

K thanks, but how would I make the fireball shoot like a fire ball?

[Busti]

Create the entity like so:

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
        Vec3 v3 = player.getLook();
        EntityFireball fireball = new EntityFireball(world, player, v3.xCoord, v3.yCoord, v3.zCoord);
        world.spawnEntityInWorld(fireball);
}

 

EDIT: You might need to mess around with the vars a bit... (EntityGhast is a good learning source.)

[SargeantPotato14]

Create the entity like so:

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
        Vec3 v3 = player.getLook();
        EntityFireball fireball = new EntityFireball(world, player, v3.xCoord, v3.yCoord, v3.zCoord);
        world.spawnEntityInWorld(fireball);
}

 

EDIT: You might need to mess around with the vars a bit... (EntityGhast is a good learning source.)

thanks! Could I ask where you learned to do this? I'm somewhat new to moding and I would like to learn as much as possible.

[SargeantPotato14]

Create the entity like so:

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
        Vec3 v3 = player.getLook();
        EntityFireball fireball = new EntityFireball(world, player, v3.xCoord, v3.yCoord, v3.zCoord);
        world.spawnEntityInWorld(fireball);
}

 

EDIT: You might need to mess around with the vars a bit... (EntityGhast is a good learning source.)

 

EntityFireball fireball = new EntityFireball(world, player, v3.xCoord, v3.yCoord, v3.zCoord);

        world.spawnEntityInWorld(fireball);

 

where the coding says(new EntityFireball......) there is a error saying "Cannot instantiate the type EntityFireball" if you could help that would be much appreciated, I don't know what instantiate means so im am extremely confused.

[Busti]

I started a bit like you...

My goal was to put XP Orbs in pipes. So i created a Block that pushed every xp orb into the air...

When I wanted to know how something works I looked how Minecraft did it or i asked here.

 

Follow you ideas and If something doesn't work just ask why. Starting can be a bit hard but its totally worth it

[Busti]

That means that java can't create a new Instance of the class because its abstract...

My bad

 

use EntitySmallFireball

[SargeantPotato14]

That means that java can't create a new Instance of the class because its abstract...

My bad

 

use EntitySmallFireball

One last problem, when I use the item it shoots two fire balls in some what random of directions. THANK YOU, for all the other things you helped me with!

[Busti]

1.

Its shooting tow, because the method is called on the client and on the server. The entity on the client will become a ghost and do nothing. The other one is an actual entity.

To spawn it only on the server surround your code with:

if (!world.isRemote) {

}

 

2.

I thought the vector function would give you the direction the player is looking at.

Try getLookVec(); instead. Otherwise you might have to calculate the view vector by using the player heads rotation yaw and pitch and calculate the entity motion manually. This is done by translating 3d polar coordinates into a vector. (http://en.wikipedia.org/wiki/Polar_coordinate_system)

p.rotationYaw;
p.rotationPitch;

 

But I think the vector function should work since its used to detect which block the player is looking at. But you might need to invert some variables.

 

3.

My signature is also a link to the forum page. Just try it out :DDD

 

[SargeantPotato14]

1.

Its shooting tow, because the method is called on the client and on the server. The entity on the client will become a ghost and do nothing. The other one is an actual entity.

To spawn it only on the server surround your code with:

if (!world.isRemote) {

}

 

2.

I thought the vector function would give you the direction the player is looking at.

Try getLookVec(); instead. Otherwise you might have to calculate the view vector by using the player heads rotation yaw and pitch and calculate the entity motion manually. This is done by translating 3d polar coordinates into a vector. (http://en.wikipedia.org/wiki/Polar_coordinate_system)

p.rotationYaw;
p.rotationPitch;

 

But I think the vector function should work since its used to detect which block the player is looking at. But you might need to invert some variables.

 

3.

My signature is also a link to the forum page. Just try it out :DDD

package com.SargeantPotato_Mod.Items;

 

import net.minecraft.creativetab.CreativeTabs;

import net.minecraft.entity.player.EntityPlayer;

import net.minecraft.entity.projectile.EntityFireball;

import net.minecraft.entity.projectile.EntitySmallFireball;

import net.minecraft.item.Item;

import net.minecraft.item.ItemStack;

import net.minecraft.util.Vec3;

import net.minecraft.world.World;

 

public class staffoffire extends Item {

 

public staffoffire(int i) {

this.setUnlocalizedName("staffoffire");

this.setTextureName("SargeantPotato_Mod:staffoffire");

this.setCreativeTab(CreativeTabs.tabCombat);

}

 

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {

        Vec3 v3 = player.getLook(0);

        EntitySmallFireball smallfireball = new EntitySmallFireball(world, player, v3.xCoord, v3.yCoord, v3.zCoord);

        world.spawnEntityInWorld(smallfireball);

return itemStack;

}

}

This is my code, the getLookVec didn't work, and im confused where to put the pitch and yaw piece of code.

also where exactly should I put the if (!world.isRemote) {

 

}? ive tried to move it around but I cant figure out where to put it........ sorry about the trouble but since your good at this I would like to learn some from you.Thanks!

 

[Busti]

Perfect solution:

 

Tested!

 

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
        if (!world.isRemote) {
            Vec3 v3 = player.getLook(1);
            EntitySmallFireball smallfireball = new EntitySmallFireball(world, player.posX, player.posY + player.eyeHeight, player.posZ, v3.xCoord, v3.yCoord, v3.zCoord);
            smallfireball.shootingEntity = player;
            world.spawnEntityInWorld(smallfireball);
        }
        return itemStack;
    }

[SargeantPotato14]

Perfect solution:

 

Tested!

 

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
        if (!world.isRemote) {
            Vec3 v3 = player.getLook(1);
            EntitySmallFireball smallfireball = new EntitySmallFireball(world, player.posX, player.posY, player.posZ, v3.xCoord, v3.yCoord, v3.zCoord);
Thank you so much!!!!!!!
            smallfireball.shootingEntity = player;
            world.spawnEntityInWorld(smallfireball);
        }
        return itemStack;
    }

[Busti]

I added the players EyeHeight to the y coordinates

[SargeantPotato14]

I added the players EyeHeight to the y coordinates

I don't know if this is the most proper way to do it but I added the eye height already by putting + 1 after player.posY

(player.posY + 1)