001 package net.minecraft.block;
002
003 import cpw.mods.fml.relauncher.Side;
004 import cpw.mods.fml.relauncher.SideOnly;
005 import java.util.Random;
006 import net.minecraft.block.material.Material;
007 import net.minecraft.creativetab.CreativeTabs;
008 import net.minecraft.entity.player.EntityPlayer;
009 import net.minecraft.item.Item;
010 import net.minecraft.item.ItemStack;
011 import net.minecraft.stats.StatList;
012 import net.minecraft.util.AxisAlignedBB;
013 import net.minecraft.world.EnumSkyBlock;
014 import net.minecraft.world.IBlockAccess;
015 import net.minecraft.world.World;
016
017 public 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 }