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