    001package net.minecraft.entity.item;
    002
    003import cpw.mods.fml.relauncher.Side;
    004import cpw.mods.fml.relauncher.SideOnly;
    005import net.minecraft.entity.Entity;
    006import net.minecraft.item.ItemStack;
    007import net.minecraft.nbt.NBTTagCompound;
    008import net.minecraft.util.MathHelper;
    009import net.minecraft.world.World;
    010
    011public class EntityFireworkRocket extends Entity
    012{
    013    /** The age of the firework in ticks. */
    014    private int fireworkAge;
    015
    016    /**
    017     * The lifetime of the firework in ticks. When the age reaches the lifetime the firework explodes.
    018     */
    019    private int lifetime;
    020
    021    public EntityFireworkRocket(World par1World)
    022    {
    023        super(par1World);
    024        this.setSize(0.25F, 0.25F);
    025    }
    026
    027    protected void entityInit()
    028    {
    029        this.dataWatcher.addObjectByDataType(8, 5);
    030    }
    031
    032    @SideOnly(Side.CLIENT)
    033
    034    /**
    035     * Checks if the entity is in range to render by using the past in distance and comparing it to its average edge
    036     * length * 64 * renderDistanceWeight Args: distance
    037     */
    038    public boolean isInRangeToRenderDist(double par1)
    039    {
    040        return par1 < 4096.0D;
    041    }
    042
    043    public EntityFireworkRocket(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack)
    044    {
    045        super(par1World);
    046        this.fireworkAge = 0;
    047        this.setSize(0.25F, 0.25F);
    048        this.setPosition(par2, par4, par6);
    049        this.yOffset = 0.0F;
    050        int i = 1;
    051
    052        if (par8ItemStack != null && par8ItemStack.hasTagCompound())
    053        {
    054            this.dataWatcher.updateObject(8, par8ItemStack);
    055            NBTTagCompound nbttagcompound = par8ItemStack.getTagCompound();
    056            NBTTagCompound nbttagcompound1 = nbttagcompound.getCompoundTag("Fireworks");
    057
    058            if (nbttagcompound1 != null)
    059            {
    060                i += nbttagcompound1.getByte("Flight");
    061            }
    062        }
    063
    064        this.motionX = this.rand.nextGaussian() * 0.001D;
    065        this.motionZ = this.rand.nextGaussian() * 0.001D;
    066        this.motionY = 0.05D;
    067        this.lifetime = 10 * i + this.rand.nextInt(6) + this.rand.nextInt(7);
    068    }
    069
    070    @SideOnly(Side.CLIENT)
    071
    072    /**
    073     * Sets the velocity to the args. Args: x, y, z
    074     */
    075    public void setVelocity(double par1, double par3, double par5)
    076    {
    077        this.motionX = par1;
    078        this.motionY = par3;
    079        this.motionZ = par5;
    080
    081        if (this.prevRotationPitch == 0.0F && this.prevRotationYaw == 0.0F)
    082        {
    083            float f = MathHelper.sqrt_double(par1 * par1 + par5 * par5);
    084            this.prevRotationYaw = this.rotationYaw = (float)(Math.atan2(par1, par5) * 180.0D / Math.PI);
    085            this.prevRotationPitch = this.rotationPitch = (float)(Math.atan2(par3, (double)f) * 180.0D / Math.PI);
    086        }
    087    }
    088
    089    /**
    090     * Called to update the entity's position/logic.
    091     */
    092    public void onUpdate()
    093    {
    094        this.lastTickPosX = this.posX;
    095        this.lastTickPosY = this.posY;
    096        this.lastTickPosZ = this.posZ;
    097        super.onUpdate();
    098        this.motionX *= 1.15D;
    099        this.motionZ *= 1.15D;
    100        this.motionY += 0.04D;
    101        this.moveEntity(this.motionX, this.motionY, this.motionZ);
    102        float f = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionZ * this.motionZ);
    103        this.rotationYaw = (float)(Math.atan2(this.motionX, this.motionZ) * 180.0D / Math.PI);
    104
    105        for (this.rotationPitch = (float)(Math.atan2(this.motionY, (double)f) * 180.0D / Math.PI); this.rotationPitch - this.prevRotationPitch < -180.0F; this.prevRotationPitch -= 360.0F)
    106        {
    107            ;
    108        }
    109
    110        while (this.rotationPitch - this.prevRotationPitch >= 180.0F)
    111        {
    112            this.prevRotationPitch += 360.0F;
    113        }
    114
    115        while (this.rotationYaw - this.prevRotationYaw < -180.0F)
    116        {
    117            this.prevRotationYaw -= 360.0F;
    118        }
    119
    120        while (this.rotationYaw - this.prevRotationYaw >= 180.0F)
    121        {
    122            this.prevRotationYaw += 360.0F;
    123        }
    124
    125        this.rotationPitch = this.prevRotationPitch + (this.rotationPitch - this.prevRotationPitch) * 0.2F;
    126        this.rotationYaw = this.prevRotationYaw + (this.rotationYaw - this.prevRotationYaw) * 0.2F;
    127
    128        if (this.fireworkAge == 0)
    129        {
    130            this.worldObj.playSoundAtEntity(this, "fireworks.launch", 3.0F, 1.0F);
    131        }
    132
    133        ++this.fireworkAge;
    134
    135        if (this.worldObj.isRemote && this.fireworkAge % 2 < 2)
    136        {
    137            this.worldObj.spawnParticle("fireworksSpark", this.posX, this.posY - 0.3D, this.posZ, this.rand.nextGaussian() * 0.05D, -this.motionY * 0.5D, this.rand.nextGaussian() * 0.05D);
    138        }
    139
    140        if (!this.worldObj.isRemote && this.fireworkAge > this.lifetime)
    141        {
    142            this.worldObj.setEntityState(this, (byte)17);
    143            this.setDead();
    144        }
    145    }
    146
    147    @SideOnly(Side.CLIENT)
    148    public void handleHealthUpdate(byte par1)
    149    {
    150        if (par1 == 17 && this.worldObj.isRemote)
    151        {
    152            ItemStack itemstack = this.dataWatcher.getWatchableObjectItemStack(8);
    153            NBTTagCompound nbttagcompound = null;
    154
    155            if (itemstack != null && itemstack.hasTagCompound())
    156            {
    157                nbttagcompound = itemstack.getTagCompound().getCompoundTag("Fireworks");
    158            }
    159
    160            this.worldObj.func_92088_a(this.posX, this.posY, this.posZ, this.motionX, this.motionY, this.motionZ, nbttagcompound);
    161        }
    162
    163        super.handleHealthUpdate(par1);
    164    }
    165
    166    /**
    167     * (abstract) Protected helper method to write subclass entity data to NBT.
    168     */
    169    public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
    170    {
    171        par1NBTTagCompound.setInteger("Life", this.fireworkAge);
    172        par1NBTTagCompound.setInteger("LifeTime", this.lifetime);
    173        ItemStack itemstack = this.dataWatcher.getWatchableObjectItemStack(8);
    174
    175        if (itemstack != null)
    176        {
    177            NBTTagCompound nbttagcompound1 = new NBTTagCompound();
    178            itemstack.writeToNBT(nbttagcompound1);
    179            par1NBTTagCompound.setCompoundTag("FireworksItem", nbttagcompound1);
    180        }
    181    }
    182
    183    /**
    184     * (abstract) Protected helper method to read subclass entity data from NBT.
    185     */
    186    public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
    187    {
    188        this.fireworkAge = par1NBTTagCompound.getInteger("Life");
    189        this.lifetime = par1NBTTagCompound.getInteger("LifeTime");
    190        NBTTagCompound nbttagcompound1 = par1NBTTagCompound.getCompoundTag("FireworksItem");
    191
    192        if (nbttagcompound1 != null)
    193        {
    194            ItemStack itemstack = ItemStack.loadItemStackFromNBT(nbttagcompound1);
    195
    196            if (itemstack != null)
    197            {
    198                this.dataWatcher.updateObject(8, itemstack);
    199            }
    200        }
    201    }
    202
    203    @SideOnly(Side.CLIENT)
    204    public float getShadowSize()
    205    {
    206        return 0.0F;
    207    }
    208
    209    /**
    210     * Gets how bright this entity is.
    211     */
    212    public float getBrightness(float par1)
    213    {
    214        return super.getBrightness(par1);
    215    }
    216
    217    @SideOnly(Side.CLIENT)
    218    public int getBrightnessForRender(float par1)
    219    {
    220        return super.getBrightnessForRender(par1);
    221    }
    222
    223    /**
    224     * If returns false, the item will not inflict any damage against entities.
    225     */
    226    public boolean canAttackWithItem()
    227    {
    228        return false;
    229    }
    230}