    001package net.minecraft.block;
    002
    003import cpw.mods.fml.relauncher.Side;
    004import cpw.mods.fml.relauncher.SideOnly;
    005import java.util.Random;
    006import net.minecraft.block.material.Material;
    007import net.minecraft.creativetab.CreativeTabs;
    008import net.minecraft.entity.player.EntityPlayer;
    009import net.minecraft.item.Item;
    010import net.minecraft.item.ItemStack;
    011import net.minecraft.stats.StatList;
    012import net.minecraft.util.AxisAlignedBB;
    013import net.minecraft.world.EnumSkyBlock;
    014import net.minecraft.world.IBlockAccess;
    015import net.minecraft.world.World;
    016
    017public class BlockSnow extends Block
    018{
    019    protected BlockSnow(int par1, int par2)
    020    {
    021        super(par1, par2, Material.snow);
    022        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 0.125F, 1.0F);
    023        this.setTickRandomly(true);
    024        this.setCreativeTab(CreativeTabs.tabDecorations);
    025    }
    026
    027    /**
    028     * Returns a bounding box from the pool of bounding boxes (this means this box can change after the pool has been
    029     * cleared to be reused)
    030     */
    031    public AxisAlignedBB getCollisionBoundingBoxFromPool(World par1World, int par2, int par3, int par4)
    032    {
    033        int var5 = par1World.getBlockMetadata(par2, par3, par4) & 7;
    034        return var5 >= 3 ? AxisAlignedBB.getAABBPool().addOrModifyAABBInPool((double)par2 + this.minX, (double)par3 + this.minY, (double)par4 + this.minZ, (double)par2 + this.maxX, (double)((float)par3 + 0.5F), (double)par4 + this.maxZ) : null;
    035    }
    036
    037    /**
    038     * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
    039     * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
    040     */
    041    public boolean isOpaqueCube()
    042    {
    043        return false;
    044    }
    045
    046    /**
    047     * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
    048     */
    049    public boolean renderAsNormalBlock()
    050    {
    051        return false;
    052    }
    053
    054    /**
    055     * Updates the blocks bounds based on its current state. Args: world, x, y, z
    056     */
    057    public void setBlockBoundsBasedOnState(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
    058    {
    059        int var5 = par1IBlockAccess.getBlockMetadata(par2, par3, par4) & 7;
    060        float var6 = (float)(2 * (1 + var5)) / 16.0F;
    061        this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, var6, 1.0F);
    062    }
    063
    064    /**
    065     * Checks to see if its valid to put this block at the specified coordinates. Args: world, x, y, z
    066     */
    067    public boolean canPlaceBlockAt(World par1World, int par2, int par3, int par4)
    068    {
    069        int var5 = par1World.getBlockId(par2, par3 - 1, par4);
    070        Block block = Block.blocksList[var5];
    071        return block != null && (block.isLeaves(par1World, par2, par3 - 1, par4) || Block.blocksList[var5].isOpaqueCube()) ? par1World.getBlockMaterial(par2, par3 - 1, par4).blocksMovement() : false;
    072    }
    073
    074    /**
    075     * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
    076     * their own) Args: x, y, z, neighbor blockID
    077     */
    078    public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
    079    {
    080        this.canSnowStay(par1World, par2, par3, par4);
    081    }
    082
    083    /**
    084     * Checks if this snow block can stay at this location.
    085     */
    086    private boolean canSnowStay(World par1World, int par2, int par3, int par4)
    087    {
    088        if (!this.canPlaceBlockAt(par1World, par2, par3, par4))
    089        {
    090            par1World.setBlockWithNotify(par2, par3, par4, 0);
    091            return false;
    092        }
    093        else
    094        {
    095            return true;
    096        }
    097    }
    098
    099    /**
    100     * Called when the player destroys a block with an item that can harvest it. (i, j, k) are the coordinates of the
    101     * block and l is the block's subtype/damage.
    102     */
    103    public void harvestBlock(World par1World, EntityPlayer par2EntityPlayer, int par3, int par4, int par5, int par6)
    104    {
    105        super.harvestBlock(par1World, par2EntityPlayer, par3, par4, par5, par6);
    106        par1World.setBlockWithNotify(par3, par4, par5, 0);
    107    }
    108
    109    /**
    110     * Returns the ID of the items to drop on destruction.
    111     */
    112    public int idDropped(int par1, Random par2Random, int par3)
    113    {
    114        return Item.snowball.itemID;
    115    }
    116
    117    /**
    118     * Returns the quantity of items to drop on block destruction.
    119     */
    120    public int quantityDropped(Random par1Random)
    121    {
    122        return 1;
    123    }
    124
    125    /**
    126     * Ticks the block if it's been scheduled
    127     */
    128    public void updateTick(World par1World, int par2, int par3, int par4, Random par5Random)
    129    {
    130        if (par1World.getSavedLightValue(EnumSkyBlock.Block, par2, par3, par4) > 11)
    131        {
    132            par1World.setBlockWithNotify(par2, par3, par4, 0);
    133        }
    134    }
    135
    136    @SideOnly(Side.CLIENT)
    137
    138    /**
    139     * Returns true if the given side of this block type should be rendered, if the adjacent block is at the given
    140     * coordinates.  Args: blockAccess, x, y, z, side
    141     */
    142    public boolean shouldSideBeRendered(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
    143    {
    144        return par5 == 1 ? true : super.shouldSideBeRendered(par1IBlockAccess, par2, par3, par4, par5);
    145    }
    146}