Minecraft Forums

@Override
public void onUpdate(ItemStack stack, World world, Entity entity, int par4, boolean par5)
{
super.onUpdate(stack, world, entity, par4, par5);

EntityPlayer player = (EntityPlayer)entity;
ItemStack equipped = player.getCurrentEquippedItem();

if(equipped == stack) {
player.addPotionEffect(new PotionEffect(13, 3));
player.addPotionEffect(new PotionEffect(14, 3));
}

}

package ZTheDragonz.TAM2.proxy;

import ZTheDragonz.TAM2.items.AmItems;
import net.minecraft.block.Block;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.util.ChatComponentText;
import net.minecraft.util.EnumChatFormatting;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;
import net.minecraftforge.event.entity.living.LivingEvent.LivingUpdateEvent;
import net.minecraftforge.event.entity.player.PlayerEvent;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;

public class TickHandler {

@SubscribeEvent
public void PEvent(PlayerEvent player) {
if(player.entityPlayer.getItemInUse().equals(AmItems.DragonWing)) {

player.entityPlayer.addChatMessage(new ChatComponentText(EnumChatFormatting.RED + "YESSSSSSSSSSSSSSSSSSSSS"));
}
}
}

public boolean PEvent(PlayerEvent event, EntityPlayer player) {
if(event.entityPlayer.getItemInUse().equals(AmItems.DragonWing)) {
player.addChatMessage(new ChatComponentText(EnumChatFormatting.RED + "YESSSSSSSSSSSSSSSSSSSSS"));
return true;
}
player.addChatMessage(new ChatComponentText(EnumChatFormatting.RED + "NOOOOOOOOOOOOOOOOOOOOOO"));
return false;
}

package com.Amazing.TheAmazingMod.entity;

import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityFlying;
import net.minecraft.entity.IEntityMultiPart;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.boss.IBossDisplayData;
import net.minecraft.entity.monster.IMob;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.EntityLargeFireball;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.DamageSource;
import net.minecraft.util.MathHelper;
import net.minecraft.util.Vec3;
import net.minecraft.world.EnumDifficulty;
import net.minecraft.world.World;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class SmilyGhast extends EntityFlying implements IBossDisplayData, IMob
{
public int courseChangeCooldown;
public double waypointX;
public double waypointY;
public double waypointZ;
private Entity targetedEntity;
/** Cooldown time between target loss and new target aquirement. */
private int aggroCooldown;
public int prevAttackCounter;
public int attackCounter;
/** The explosion radius of spawned fireballs. */
private int explosionStrength = 4;
private static final String __OBFID = "CL_00001689";

public SmilyGhast(World par1World)
{
super(par1World);
this.setSize(4.0F, 4.0F);
this.isImmuneToFire = true;
this.experienceValue = 20;
}

@SideOnly(Side.CLIENT)
public boolean func_110182_bF()
{
return this.dataWatcher.getWatchableObjectByte(16) != 0;
}

/**
* Called when the entity is attacked.
*/
public boolean attackEntityFrom(DamageSource par1DamageSource, float par2)
{
if (this.isEntityInvulnerable())
{
return false;
}
else if ("fireball".equals(par1DamageSource.getDamageType()) && par1DamageSource.getEntity() instanceof EntityPlayer)
{
super.attackEntityFrom(par1DamageSource, 42.0F);
return true;
}
else
{
return super.attackEntityFrom(par1DamageSource, par2);
}
}

protected void entityInit()
{
super.entityInit();
this.dataWatcher.addObject(16, Byte.valueOf((byte)0));
}

protected void applyEntityAttributes()
{
super.applyEntityAttributes();
this.getEntityAttribute(SharedMonsterAttributes.maxHealth).setBaseValue(420.0D);
this.getEntityAttribute(SharedMonsterAttributes.movementSpeed).setBaseValue(0.40F);;
}

protected void updateEntityActionState()
{
if (!this.worldObj.isRemote && this.worldObj.difficultySetting == EnumDifficulty.PEACEFUL)
{
this.setDead();
}

this.spawnExplosionParticle();
this.prevAttackCounter = this.attackCounter;
double d0 = this.waypointX - this.posX;
double d1 = this.waypointY - this.posY;
double d2 = this.waypointZ - this.posZ;
double d3 = d0 * d0 + d1 * d1 + d2 * d2;

if (d3 < 1.0D || d3 > 3600.0D)
{
this.waypointX = this.posX + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 10.0F);
this.waypointY = this.posY + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 10.0F);
this.waypointZ = this.posZ + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 10.0F);
}

if (this.courseChangeCooldown-- <= 0)
{
this.courseChangeCooldown += this.rand.nextInt(5) + 1;
d3 = (double)MathHelper.sqrt_double(d3);

if (this.isCourseTraversable(this.waypointX, this.waypointY, this.waypointZ, d3))
{
this.motionX += d0 / d3 * 0.1D;
this.motionY += d1 / d3 * 0.1D;
this.motionZ += d2 / d3 * 0.1D;
}
else
{
this.waypointX = this.posX;
this.waypointY = this.posY;
this.waypointZ = this.posZ;
}
}

if (this.targetedEntity != null && this.targetedEntity.isDead)
{
this.targetedEntity = null;
}

if (this.targetedEntity == null || this.aggroCooldown-- <= 0)
{
this.targetedEntity = this.worldObj.getClosestVulnerablePlayerToEntity(this, 100.0D);

if (this.targetedEntity != null)
{
this.aggroCooldown = 20;
}
}

double d4 = 64.0D;

if (this.targetedEntity != null && this.targetedEntity.getDistanceSqToEntity(this) < d4 * d4)
{
double d5 = this.targetedEntity.posX - this.posX;
double d6 = this.targetedEntity.boundingBox.minY + (double)(this.targetedEntity.height / 2.0F) - (this.posY + (double)(this.height / 2.0F));
double d7 = this.targetedEntity.posZ - this.posZ;
this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(d5, d7)) * 180.0F / (float)Math.PI;

if (this.canEntityBeSeen(this.targetedEntity))
{
if (this.attackCounter == 10)
{
this.worldObj.playAuxSFXAtEntity((EntityPlayer)null, 1007, (int)this.posX, (int)this.posY, (int)this.posZ, 0);
}

++this.attackCounter;

if (this.attackCounter == 20)
{
this.worldObj.playAuxSFXAtEntity((EntityPlayer)null, 1008, (int)this.posX, (int)this.posY, (int)this.posZ, 0);
EntityLargeFireball entitylargefireball = new EntityLargeFireball(this.worldObj, this, d5, d6, d7);
entitylargefireball.field_92057_e = this.explosionStrength;
double d8 = 4.0D;
Vec3 vec3 = this.getLook(1.0F);
entitylargefireball.posX = this.posX + vec3.xCoord * d8;
entitylargefireball.posY = this.posY + (double)(this.height / 2.0F) + 0.5D;
entitylargefireball.posZ = this.posZ + vec3.zCoord * d8;
this.worldObj.spawnEntityInWorld(entitylargefireball);
this.attackCounter = -40;
}
}
else if (this.attackCounter > 0)
{
--this.attackCounter;
}
}
else
{
this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(this.motionX, this.motionZ)) * 180.0F / (float)Math.PI;

if (this.attackCounter > 0)
{
--this.attackCounter;
}
}

if (!this.worldObj.isRemote)
{
byte b1 = this.dataWatcher.getWatchableObjectByte(16);
byte b0 = (byte)(this.attackCounter > 10 ? 1 : 0);

if (b1 != b0)
{
this.dataWatcher.updateObject(16, Byte.valueOf(b0));
}
}
}

@Override
public boolean getCanSpawnHere()
{
int i = MathHelper.floor_double(this.posX);
int j = MathHelper.floor_double(this.boundingBox.minY);
int k = MathHelper.floor_double(this.posZ);
return this.worldObj.getBlock(i, j - 1, k) == Blocks.nether_brick && this.worldObj.getFullBlockLightValue(i, j, k) < 8 && super.getCanSpawnHere();
}

private boolean isCourseTraversable(double par1, double par3, double par5, double par7)
{
double d4 = (this.waypointX - this.posX) / par7;
double d5 = (this.waypointY - this.posY) / par7;
double d6 = (this.waypointZ - this.posZ) / par7;
AxisAlignedBB axisalignedbb = this.boundingBox.copy();

for (int i = 1; (double)i < par7; ++i)
{
axisalignedbb.offset(d4, d5, d6);

if (!this.worldObj.getCollidingBoundingBoxes(this, axisalignedbb).isEmpty())
{
return false;
}
}

return true;
}

/**
* Returns the sound this mob makes while it's alive.
*/
protected String getLivingSound()
{
return "mob.ghast.moan";
}

/**
* Returns the sound this mob makes when it is hurt.
*/
protected String getHurtSound()
{
return "mob.ghast.scream";
}

/**
* Returns the sound this mob makes on death.
*/
protected String getDeathSound()
{
return "mob.ghast.death";
}

protected Item getDropItem()
{
return Items.gunpowder;
}

/**
* Drop 0-2 items of this living's type. @param par1 - Whether this entity has recently been hit by a player. @param
* par2 - Level of Looting used to kill this mob.
*/
protected void dropFewItems(boolean par1, int par2)
{
int j = this.rand.nextInt(2) + this.rand.nextInt(1 + par2);
int k;

for (k = 0; k < j; ++k)
{
this.dropItem(Items.ghast_tear, 1);
}

j = this.rand.nextInt(3) + this.rand.nextInt(1 + par2);

for (k = 0; k < j; ++k)
{
this.dropItem(Items.gunpowder, 1);
}
}

/**
* Returns the volume for the sounds this mob makes.
*/
protected float getSoundVolume()
{
return 10.0F;
}

/**
* Checks if the entity's current position is a valid location to spawn this entity.
*/

/**
* Will return how many at most can spawn in a chunk at once.
*/
public int getMaxSpawnedInChunk()
{
return 1;
}

/**
* (abstract) Protected helper method to write subclass entity data to NBT.
*/
public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
{
super.writeEntityToNBT(par1NBTTagCompound);
par1NBTTagCompound.setInteger("ExplosionPower", this.explosionStrength);
}

/**
* (abstract) Protected helper method to read subclass entity data from NBT.
*/
public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
{
super.readEntityFromNBT(par1NBTTagCompound);

if (par1NBTTagCompound.hasKey("ExplosionPower", 99))
{
this.explosionStrength = par1NBTTagCompound.getInteger("ExplosionPower");
}
}

}

EntityRegistry.addSpawn(SmilyGhast.class, 1, 1, 1, EnumCreatureType.ambient,BiomeDictionary.getBiomesForType(Type.NETHER));
EntityRegistry.registerGlobalEntityID(SmilyGhast.class, "SmilyGhast", EntityRegistry.findGlobalUniqueEntityId(),Color.BLACK.getRGB(),Color.RED.getRGB());