how to make aimed gun?

this my gun code:   package mod.mcreator; import net.minecraftforge.fml.client.registry.*; import net.minecraftforge.fml.common.*; import net.minecraftforge.fml.common.asm.*; import net.minecraftforge.fml.common.asm.transformers.*; import net.minecraftforge.fml.common.discovery.*; import net.minecraftforge.fml.common.discovery.asm.*; import net.minecraftforge.fml.common.event.*; import net.minecraftforge.fml.common.functions.*; import net.minecraftforge.fml.common.network.*; import net.minecraftforge.fml.common.registry.*; import net.minecraftforge.fml.common.toposort.*; import net.minecraftforge.fml.common.versioning.*; import net.minecraftforge.fml.relauncher.*; import net.minecraftforge.fml.server.*; import net.minecraft.block.*; import net.minecraft.block.material.*; import net.minecraft.client.*; import net.minecraft.client.audio.*; import net.minecraft.client.entity.*; import net.minecraft.client.gui.*; import net.minecraft.client.gui.achievement.*; import net.minecraft.client.gui.inventory.*; import net.minecraft.client.model.*; import net.minecraft.client.multiplayer.*; import net.minecraft.client.particle.*; import net.minecraft.client.renderer.*; import net.minecraft.client.renderer.culling.*; import net.minecraft.client.renderer.entity.*; import net.minecraft.client.renderer.tileentity.*; import net.minecraft.client.settings.*; import net.minecraft.command.*; import net.minecraft.crash.*; import net.minecraft.creativetab.*; import net.minecraft.dispenser.*; import net.minecraft.enchantment.*; import net.minecraft.entity.*; import net.minecraft.entity.ai.*; import net.minecraft.entity.boss.*; import net.minecraft.entity.effect.*; import net.minecraft.entity.item.*; import net.minecraft.entity.monster.*; import net.minecraft.entity.passive.*; import net.minecraft.entity.player.*; import net.minecraft.entity.projectile.*; import net.minecraft.inventory.*; import net.minecraft.item.*; import net.minecraft.item.crafting.*; import net.minecraft.nbt.*; import net.minecraft.network.*; import net.minecraft.network.rcon.*; import net.minecraft.pathfinding.*; import net.minecraft.potion.*; import net.minecraft.profiler.*; import net.minecraft.server.*; import net.minecraft.server.dedicated.*; import net.minecraft.server.gui.*; import net.minecraft.server.integrated.*; import net.minecraft.server.management.*;   import net.minecraft.stats.*; import net.minecraft.tileentity.*; import net.minecraft.util.*; import net.minecraft.village.*; import net.minecraft.world.*; import net.minecraft.world.biome.*; import net.minecraft.world.chunk.*; import net.minecraft.world.chunk.storage.*; import net.minecraft.world.demo.*; import net.minecraft.world.gen.*; import net.minecraft.world.gen.feature.*; import net.minecraft.world.gen.layer.*; import net.minecraft.world.gen.structure.*; import net.minecraft.world.storage.*; import net.minecraftforge.classloading.*; import net.minecraftforge.client.*; import net.minecraftforge.client.event.*; import net.minecraftforge.client.event.sound.*; import net.minecraftforge.common.*; import net.minecraftforge.event.*; import net.minecraftforge.event.entity.*; import net.minecraftforge.event.entity.item.*; import net.minecraftforge.event.entity.living.*; import net.minecraftforge.event.entity.minecart.*; import net.minecraftforge.event.entity.player.*; import net.minecraftforge.event.terraingen.*; import net.minecraftforge.event.world.*; import net.minecraftforge.oredict.*; import net.minecraftforge.transformers.*; import net.minecraft.init.*; import java.util.*;   import net.minecraft.client.resources.model.*;   public class mcreator_t {   public mcreator_t(){}   public static Item block; public static Object instance;   public void load(FMLInitializationEvent event){ if(event.getSide() == Side.CLIENT) Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(block, 0, new ModelResourceLocation("TestEnvironmentMod:t", "inventory"));   }   public void registerRenderers(){} public void generateNether(World world, Random random, int chunkX, int chunkZ){} public void generateSurface(World world, Random random, int chunkX, int chunkZ){} public int addFuel(ItemStack fuel){ return 0; } public void serverLoad(FMLServerStartingEvent event){} public void preInit(FMLPreInitializationEvent event){}   static{ block = (new ItemgGUN()); }   static class ItemgGUN extends Item{   public ItemgGUN(){ super(); setMaxDamage(100); maxStackSize = 1; setFull3D(); setUnlocalizedName("t"); GameRegistry.registerItem(this, "t"); setCreativeTab(CreativeTabs.tabCombat); }   public int getMaxItemUseDuration(ItemStack par1ItemStack)     {         return 72000;     }      public ItemStack onItemRightClick(ItemStack par1ItemStack, World par2World, final EntityPlayer par3EntityPlayer){           boolean flag = par3EntityPlayer.capabilities.isCreativeMode || EnchantmentHelper.getEnchantmentLevel(Enchantment.infinity.effectId, par1ItemStack) > 0;           if (flag || par3EntityPlayer.inventory.hasItem(Items.arrow))         {             float f = 1.0F;               EntityArrow entityarrow = new EntityArrow(par2World, par3EntityPlayer, f * 2.0F)             {   public void onCollideWithPlayer(EntityPlayer entity){ super.onCollideWithPlayer(entity); int i = MathHelper.floor_double(this.getEntityBoundingBox().minX + 0.001D); int j = MathHelper.floor_double(this.getEntityBoundingBox().minY + 0.001D); int k = MathHelper.floor_double(this.getEntityBoundingBox().minZ + 0.001D); World world = this.worldObj;   }               public void onUpdate(){     super.onUpdate();     int i = MathHelper.floor_double(this.getEntityBoundingBox().minX + 0.001D);     int j = MathHelper.floor_double(this.getEntityBoundingBox().minY + 0.001D);     int k = MathHelper.floor_double(this.getEntityBoundingBox().minZ + 0.001D);     World world = this.worldObj;     Entity entity = (Entity)par3EntityPlayer;          if (getBlock(this.worldObj, i, j, k) != Blocks.air || getBlock(this.worldObj, i, j-1, k) != Blocks.air ||     getBlock(this.worldObj, i, j+1, k) != Blocks.air ||     getBlock(this.worldObj, i+1, j, k) != Blocks.air || getBlock(this.worldObj, i-1, j, k) != Blocks.air     || getBlock(this.worldObj, i, j, k+1) != Blocks.air || getBlock(this.worldObj, i, j, k-1) != Blocks.air){             this.kill();     }               }               };                   entityarrow.setIsCritical(false);                 entityarrow.setDamage(5.0);                 entityarrow.setKnockbackStrength(5);                   if(false){                 entityarrow.setFire(100); }               par1ItemStack.damageItem(1, par3EntityPlayer);             par2World.playSoundAtEntity(par3EntityPlayer, "random.bow", 1.0F, 1.0F / (itemRand.nextFloat() * 0.4F + 1.2F) + f * 0.5F);               if (flag)             {                 entityarrow.canBePickedUp = 2;             }             else             {                 par3EntityPlayer.inventory.consumeInventoryItem(Items.arrow);             }               if (!par2World.isRemote)             {                 par2World.spawnEntityInWorld(entityarrow);             }             World world = par2World;             EntityPlayer entity = par3EntityPlayer; int i = (int)entity.posX; int j = (int)entity.posY; int k = (int)entity.posZ;                      }           return par1ItemStack;     }   public Block getBlock(World par1World, int i, int j, int k){ return par1World.getBlockState(new BlockPos(i, j, k)).getBlock(); }           /**      * returns the action that specifies what animation to play when the items is being used      */     public EnumAction getItemUseAction(ItemStack par1ItemStack)     {         return EnumAction.BOW;     } public void onPlayerStoppedUsing(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer, int par4) { boolean var5 = par3EntityPlayer.capabilities.isCreativeMode || EnchantmentHelper.getEnchantmentLevel(Enchantment.infinity.effectId, par1ItemStack) > 0; if (var5 || par3EntityPlayer.inventory.hasItem(Items.arrow)) { int var6 = this.getMaxItemUseDuration(par1ItemStack) - par4; float var7 = (float)var6 / 20.0F; var7 = (var7 * var7 + var7 * 2.0F) / 3.0F; if ((double)var7 < 0.1D) { return; } if (var7 > 1.0F) { var7 = 1.0F; } EntityArrow var8 = new EntityArrow(par2World, par3EntityPlayer, var7 * 2.0F); if (var7 == 1.0F) { var8.setIsCritical(true); } int var9 = EnchantmentHelper.getEnchantmentLevel(Enchantment.power.effectId, par1ItemStack); if (var9 > 0) { var8.setDamage(var8.getDamage() + (double)var9 * 0.5D + 0.5D); } int var10 = EnchantmentHelper.getEnchantmentLevel(Enchantment.punch.effectId, par1ItemStack); if (var10 > 0) { var8.setKnockbackStrength(var10); } if (EnchantmentHelper.getEnchantmentLevel(Enchantment.flame.effectId, par1ItemStack) > 0) { var8.setFire(100); } par1ItemStack.damageItem(1, par3EntityPlayer); par2World.playSoundAtEntity(par3EntityPlayer, "random.bow", 1.0F, 1.0F / (itemRand.nextFloat() * 0.4F + 1.2F) + var7 * 0.5F); if (var5) { var8.canBePickedUp = 2; } else { par3EntityPlayer.inventory.consumeInventoryItem(Items.arrow); } if (!par2World.isRemote) { par2World.spawnEntityInWorld(var8); } } } public ItemStack onEaten(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer) { return par1ItemStack; } //How long it takes to use or consume an item public int getMaxItemUseDuration(ItemStack par1ItemStack) { return 72000; } //Returns the action that specifies what animation to play when the items is being used public EnumAction getItemUseAction(ItemStack par1ItemStack) { return EnumAction.bow; } //Called whenever this item is equipped and the right mouse button is pressed. Args: itemStack, world, entityPlayer public ItemStack onItemRightClick(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer) { if (par3EntityPlayer.capabilities.isCreativeMode || par3EntityPlayer.inventory.hasItem(Items.arrow)) { par3EntityPlayer.setItemInUse(par1ItemStack, this.getMaxItemUseDuration(par1ItemStack)); } return par1ItemStack; }   }}

I also add to my item code:   package mod.mcreator; import net.minecraftforge.fml.client.registry.*; import net.minecraftforge.fml.common.*; import net.minecraftforge.fml.common.asm.*; import net.minecraftforge.fml.common.asm.transformers.*; import net.minecraftforge.fml.common.discovery.*; import net.minecraftforge.fml.common.discovery.asm.*; import net.minecraftforge.fml.common.event.*; import net.minecraftforge.fml.common.functions.*; import net.minecraftforge.fml.common.network.*; import net.minecraftforge.fml.common.registry.*; import net.minecraftforge.fml.common.toposort.*; import net.minecraftforge.fml.common.versioning.*; import net.minecraftforge.fml.relauncher.*; import net.minecraftforge.fml.server.*; import net.minecraft.block.*; import net.minecraft.block.material.*; import net.minecraft.client.*; import net.minecraft.client.audio.*; import net.minecraft.client.entity.*; import net.minecraft.client.gui.*; import net.minecraft.client.gui.achievement.*; import net.minecraft.client.gui.inventory.*; import net.minecraft.client.model.*; import net.minecraft.client.multiplayer.*; import net.minecraft.client.particle.*; import net.minecraft.client.renderer.*; import net.minecraft.client.renderer.culling.*; import net.minecraft.client.renderer.entity.*; import net.minecraft.client.renderer.tileentity.*; import net.minecraft.client.settings.*; import net.minecraft.command.*; import net.minecraft.crash.*; import net.minecraft.creativetab.*; import net.minecraft.dispenser.*; import net.minecraft.enchantment.*; import net.minecraft.entity.*; import net.minecraft.entity.ai.*; import net.minecraft.entity.boss.*; import net.minecraft.entity.effect.*; import net.minecraft.entity.item.*; import net.minecraft.entity.monster.*; import net.minecraft.entity.passive.*; import net.minecraft.entity.player.*; import net.minecraft.entity.projectile.*; import net.minecraft.inventory.*; import net.minecraft.item.*; import net.minecraft.item.crafting.*; import net.minecraft.nbt.*; import net.minecraft.network.*; import net.minecraft.network.rcon.*; import net.minecraft.pathfinding.*; import net.minecraft.potion.*; import net.minecraft.profiler.*; import net.minecraft.server.*; import net.minecraft.server.dedicated.*; import net.minecraft.server.gui.*; import net.minecraft.server.integrated.*; import net.minecraft.server.management.*; import net.minecraft.stats.*; import net.minecraft.tileentity.*; import net.minecraft.util.*; import net.minecraft.village.*; import net.minecraft.world.*; import net.minecraft.world.biome.*; import net.minecraft.world.chunk.*; import net.minecraft.world.chunk.storage.*; import net.minecraft.world.demo.*; import net.minecraft.world.gen.*; import net.minecraft.world.gen.feature.*; import net.minecraft.world.gen.layer.*; import net.minecraft.world.gen.structure.*; import net.minecraft.world.storage.*; import net.minecraftforge.classloading.*; import net.minecraftforge.client.*; import net.minecraftforge.client.event.*; import net.minecraftforge.client.event.sound.*; import net.minecraftforge.common.*; import net.minecraftforge.event.*; import net.minecraftforge.event.entity.*; import net.minecraftforge.event.entity.item.*; import net.minecraftforge.event.entity.living.*; import net.minecraftforge.event.entity.minecart.*; import net.minecraftforge.event.entity.player.*; import net.minecraftforge.event.terraingen.*; import net.minecraftforge.event.world.*; import net.minecraftforge.oredict.*; import net.minecraftforge.transformers.*; import net.minecraft.init.*; import java.util.*; import net.minecraftforge.common.util.*;   import org.lwjgl.opengl.GL11;   import net.minecraft.client.resources.model.*;     @SuppressWarnings("unchecked") public class mcreator_revolverReload{   public mcreator_revolverReload(){}   public static Item block;public static Object instance;public void load(FMLInitializationEvent event){ if(event.getSide() == Side.CLIENT) Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(block, 0, new ModelResourceLocation("TestEnvironmentMod:RevolverReload", "inventory"));   GameRegistry.addRecipe(new ItemStack(block, 1), new Object[]{ "012", "X45", "XXX", Character.valueOf('0'), new ItemStack(mcreator_gunBarrel.block, 1), Character.valueOf('1'), new ItemStack(mcreator_revolverRound.block, 1), Character.valueOf('2'), new ItemStack(mcreator_gunLock.block, 1), Character.valueOf('4'), new ItemStack(mcreator_gear.block, 1), Character.valueOf('5'), new ItemStack(mcreator_gunStock.block, 1),  });} public void generateNether(World world, Random random, int chunkX, int chunkZ){} public void generateSurface(World world, Random random, int chunkX, int chunkZ){} public int addFuel(ItemStack fuel){return 0;} public void serverLoad(FMLServerStartingEvent event){} public void preInit(FMLPreInitializationEvent event){} public void registerRenderers(){ }     static{ block = (new ItemrevolverReload(448));   }   static class ItemrevolverReload extends Item{   public ItemrevolverReload(int par1){ setMaxDamage(0); maxStackSize = 1; setUnlocalizedName("RevolverReload"); GameRegistry.registerItem(this, "RevolverReload"); setCreativeTab(CreativeTabs.tabCombat); } public int getItemEnchantability() {     return 0; } public int getMaxItemUseDuration(ItemStack par1ItemStack) {     return 0; } public float getStrVsBlock(ItemStack par1ItemStack, Block par2Block) {     return 1.0F; }   public ItemStack onItemRightClick(ItemStack itemstack, World world, EntityPlayer entity){ float var4 = 1.0F; int i = (int)(entity.prevPosX + (entity.posX - entity.prevPosX) * (double)var4); int j = (int)(entity.prevPosY + (entity.posY - entity.prevPosY) * (double)var4 + 1.62D); int k = (int)(entity.prevPosZ + (entity.posZ - entity.prevPosZ) * (double)var4);   if(entity.inventory.hasItem(new ItemStack(mcreator_gunBullet.block).getItem())){ EntityArrow entityarrow = new EntityArrow(world, (EntityLivingBase)entity, 2 * 2.0F); entityarrow.setDamage(2*2.0F); entityarrow.setKnockbackStrength(1); world.playSoundAtEntity(entity, "random.bow", 1.0F, 1.0F / (0.5F * 0.4F + 1.2F) + 2 * 0.5F); if (!world.isRemote) world.spawnEntityInWorld(entityarrow); }   if(entity.inventory.hasItem(new ItemStack(mcreator_gunBullet.block).getItem())){ if(entity instanceof EntityPlayer)((EntityPlayer)entity).inventory.consumeInventoryItem(mcreator_gunBullet.block); }   if(true){ world.createExplosion((Entity)null, i, j, k, 0F, true); }   return itemstack; } public void onPlayerStoppedUsing(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer, int par4) { boolean var5 = par3EntityPlayer.capabilities.isCreativeMode || EnchantmentHelper.getEnchantmentLevel(Enchantment.infinity.effectId, par1ItemStack) > 0; if (var5 || par3EntityPlayer.inventory.hasItem(mcreator_gunBullet.block)) { int var6 = this.getMaxItemUseDuration(par1ItemStack) - par4; float var7 = (float)var6 / 20.0F; var7 = (var7 * var7 + var7 * 2.0F) / 3.0F; if ((double)var7 < 0.1D) { return; } if (var7 > 1.0F) { var7 = 1.0F; } EntityArrow var8 = new EntityArrow(par2World, par3EntityPlayer, var7 * 2.0F); if (var7 == 1.0F) { var8.setIsCritical(true); } int var9 = EnchantmentHelper.getEnchantmentLevel(Enchantment.power.effectId, par1ItemStack); if (var9 > 0) { var8.setDamage(var8.getDamage() + (double)var9 * 0.5D + 0.5D); } int var10 = EnchantmentHelper.getEnchantmentLevel(Enchantment.punch.effectId, par1ItemStack); if (var10 > 0) { var8.setKnockbackStrength(var10); } if (EnchantmentHelper.getEnchantmentLevel(Enchantment.flame.effectId, par1ItemStack) > 0) { var8.setFire(100); } par1ItemStack.damageItem(1, par3EntityPlayer); par2World.playSoundAtEntity(par3EntityPlayer, "random.bow", 1.0F, 1.0F / (itemRand.nextFloat() * 0.4F + 1.2F) + var7 * 0.5F); if (var5) { var8.canBePickedUp = 2; } else { par3EntityPlayer.inventory.consumeInventoryItem(mcreator_gunBullet.block); } if (!par2World.isRemote) { par2World.spawnEntityInWorld(var8); } } } public ItemStack onEaten(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer) { return par1ItemStack; } //How long it takes to use or consume an item public int getMaxItemUseDuration(ItemStack par1ItemStack) { return 72000; } //Returns the action that specifies what animation to play when the items is being used public EnumAction getItemUseAction(ItemStack par1ItemStack) { return EnumAction.bow; } //Called whenever this item is equipped and the right mouse button is pressed. Args: itemStack, world, entityPlayer public ItemStack onItemRightClick(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer) { if (par3EntityPlayer.capabilities.isCreativeMode || par3EntityPlayer.inventory.hasItem(mcreator_gunBullet.block)) { par3EntityPlayer.setItemInUse(par1ItemStack, this.getMaxItemUseDuration(par1ItemStack)); } return par1ItemStack; }       }}