EntityMinecartTNT.java

package net.minecraft.entity.item;

import net.minecraft.block.BlockRailBase;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.Entity;
import net.minecraft.entity.projectile.EntityArrow;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.BlockPos;
import net.minecraft.util.DamageSource;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.world.Explosion;
import net.minecraft.world.World;

public class EntityMinecartTNT extends EntityMinecart
{
    private int minecartTNTFuse = -1;
    private static final String __OBFID = "CL_00001680";

    public EntityMinecartTNT(World worldIn)
    {
        super(worldIn);
    }

    public EntityMinecartTNT(World worldIn, double p_i1728_2_, double p_i1728_4_, double p_i1728_6_)
    {
        super(worldIn, p_i1728_2_, p_i1728_4_, p_i1728_6_);
    }

    public EntityMinecart.EnumMinecartType func_180456_s()
    {
        return EntityMinecart.EnumMinecartType.TNT;
    }

    public IBlockState func_180457_u()
    {
        return Blocks.tnt.getDefaultState();
    }

    /**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        super.onUpdate();

        if (this.minecartTNTFuse > 0)
        {
            --this.minecartTNTFuse;
            this.worldObj.spawnParticle(EnumParticleTypes.SMOKE_NORMAL, this.posX, this.posY + 0.5D, this.posZ, 0.0D, 0.0D, 0.0D, new int[0]);
        }
        else if (this.minecartTNTFuse == 0)
        {
            this.explodeCart(this.motionX * this.motionX + this.motionZ * this.motionZ);
        }

        if (this.isCollidedHorizontally)
        {
            double var1 = this.motionX * this.motionX + this.motionZ * this.motionZ;

            if (var1 >= 0.009999999776482582D)
            {
                this.explodeCart(var1);
            }
        }
    }

    /**
     * Called when the entity is attacked.
     */
    public boolean attackEntityFrom(DamageSource source, float amount)
    {
        Entity var3 = source.getSourceOfDamage();

        if (var3 instanceof EntityArrow)
        {
            EntityArrow var4 = (EntityArrow)var3;

            if (var4.isBurning())
            {
                this.explodeCart(var4.motionX * var4.motionX + var4.motionY * var4.motionY + var4.motionZ * var4.motionZ);
            }
        }

        return super.attackEntityFrom(source, amount);
    }

    public void killMinecart(DamageSource p_94095_1_)
    {
        super.killMinecart(p_94095_1_);
        double var2 = this.motionX * this.motionX + this.motionZ * this.motionZ;

        if (!p_94095_1_.isExplosion())
        {
            this.entityDropItem(new ItemStack(Blocks.tnt, 1), 0.0F);
        }

        if (p_94095_1_.isFireDamage() || p_94095_1_.isExplosion() || var2 >= 0.009999999776482582D)
        {
            this.explodeCart(var2);
        }
    }

    /**
     * Makes the minecart explode.
     */
    protected void explodeCart(double p_94103_1_)
    {
        if (!this.worldObj.isRemote)
        {
            double var3 = Math.sqrt(p_94103_1_);

            if (var3 > 5.0D)
            {
                var3 = 5.0D;
            }

            this.worldObj.createExplosion(this, this.posX, this.posY, this.posZ, (float)(4.0D + this.rand.nextDouble() * 1.5D * var3), true);
            this.setDead();
        }
    }

    public void fall(float distance, float damageMultiplier)
    {
        if (distance >= 3.0F)
        {
            float var3 = distance / 10.0F;
            this.explodeCart((double)(var3 * var3));
        }

        super.fall(distance, damageMultiplier);
    }

    /**
     * Called every tick the minecart is on an activator rail. Args: x, y, z, is the rail receiving power
     */
    public void onActivatorRailPass(int p_96095_1_, int p_96095_2_, int p_96095_3_, boolean p_96095_4_)
    {
        if (p_96095_4_ && this.minecartTNTFuse < 0)
        {
            this.ignite();
        }
    }

    /**
     * Ignites this TNT cart.
     */
    public void ignite()
    {
        this.minecartTNTFuse = 80;

        if (!this.worldObj.isRemote)
        {
            this.worldObj.setEntityState(this, (byte)10);

            if (!this.isSlient())
            {
                this.worldObj.playSoundAtEntity(this, "game.tnt.primed", 1.0F, 1.0F);
            }
        }
    }

    /**
     * Returns true if the TNT minecart is ignited.
     */
    public boolean isIgnited()
    {
        return this.minecartTNTFuse > -1;
    }

    /**
     * Explosion resistance of a block relative to this entity
     */
    public float getExplosionResistance(Explosion p_180428_1_, World worldIn, BlockPos p_180428_3_, IBlockState p_180428_4_)
    {
        return this.isIgnited() && (BlockRailBase.func_176563_d(p_180428_4_) || BlockRailBase.func_176562_d(worldIn, p_180428_3_.offsetUp())) ? 0.0F : super.getExplosionResistance(p_180428_1_, worldIn, p_180428_3_, p_180428_4_);
    }

    public boolean func_174816_a(Explosion p_174816_1_, World worldIn, BlockPos p_174816_3_, IBlockState p_174816_4_, float p_174816_5_)
    {
        return this.isIgnited() && (BlockRailBase.func_176563_d(p_174816_4_) || BlockRailBase.func_176562_d(worldIn, p_174816_3_.offsetUp())) ? false : super.func_174816_a(p_174816_1_, worldIn, p_174816_3_, p_174816_4_, p_174816_5_);
    }

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

        if (tagCompund.hasKey("TNTFuse", 99))
        {
            this.minecartTNTFuse = tagCompund.getInteger("TNTFuse");
        }
    }

    /**
     * (abstract) Protected helper method to write subclass entity data to NBT.
     */
    protected void writeEntityToNBT(NBTTagCompound tagCompound)
    {
        super.writeEntityToNBT(tagCompound);
        tagCompound.setInteger("TNTFuse", this.minecartTNTFuse);
    }
}