laser beam gun

[lickyman]

I have been working on a new halo mod and wanted to know how to make an item shoot out a beam to attack entities

[david476]

Look into entities, items, the vanilla bow and arrow, and check the forge wiki for a gun tutorial (I think I remember seeing one).

[KeeganDeathman]

If you mean a continuous beam you have problems.

 

[Ernio]

Well, only problem here would be handling dealing effect and rendering.

 

Make item have look at rightclicking and use methods. (I've never used this one but looks promising: onUsingTick())

In your ItemStack you will have to store ammo (power) that would decrement with rightclick/using.

Then you will need to use some GL and math (vectors and shit) to make a beam with limited range (that's just visual effect, client-side)

And ofc. to apply your actual effect you will need to use raytracing (have look at MovingObjectPosition.class, server-side)

Problem could be making limited range - don't make it too far, most of code for getting player's eyes direction are in vanilla so that should save time (you know, cross-hair?)

 

If you would have any actual code that would be nice.

[lickyman]

i will see if i can get this to work with your suggestions.

 

[lickyman]

ok as it seems i do not understand this at all, but i did make an outline for the item

package com.licky.items;

import com.licky.llb.StringLibrary;
import com.licky.mobs.CustomArrow;
import com.licky.mobs.EntityGrenade;
import com.licky.mobs.FuelRodBolt;

import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.enchantment.Enchantment;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.EntitySnowball;
import net.minecraft.init.Items;
import net.minecraft.item.EnumAction;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.entity.player.ArrowLooseEvent;
import net.minecraftforge.event.entity.player.ArrowNockEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class SentinelBeam extends Item{

private static final String __OBFID = "CL_00001777";

public SentinelBeam() {
	this.maxStackSize = 1;
	this.setMaxDamage(384);
}

public int getMaxItemUseDuration(ItemStack p_77626_1_) {
	return 72000;
}


public EnumAction getItemUseAction(ItemStack p_77661_1_) {
	return EnumAction.bow;
}
public ItemStack onUsingTick(ItemStack ItemI, World Seven,
	EntityPlayer Me){

return ItemI;

}

public ItemStack onItemRightClick(ItemStack p_77659_1_, World Seven,
		EntityPlayer Me) {

	if (Me.capabilities.isCreativeMode) {

	}
	//if (Me.inventory.hasItem(Items.redstone)) {


	//	this.getMaxItemUseDuration(p_77659_1_);
	//	}


	return p_77659_1_;
}


}