    001    package net.minecraft.block;
    002
    003    import cpw.mods.fml.common.Side;
    004    import cpw.mods.fml.common.asm.SideOnly;
    005    import java.util.Random;
    006    import net.minecraft.block.material.Material;
    007    import net.minecraft.item.Item;
    008    import net.minecraft.tileentity.TileEntity;
    009    import net.minecraft.util.AxisAlignedBB;
    010    import net.minecraft.world.IBlockAccess;
    011    import net.minecraft.world.World;
    012
    013    public class BlockSign extends BlockContainer
    014    {
    015        private Class signEntityClass;
    016
    017        /** Whether this is a freestanding sign or a wall-mounted sign */
    018        private boolean isFreestanding;
    019
    020        protected BlockSign(int par1, Class par2Class, boolean par3)
    021        {
    022            super(par1, Material.wood);
    023            this.isFreestanding = par3;
    024            this.blockIndexInTexture = 4;
    025            this.signEntityClass = par2Class;
    026            float var4 = 0.25F;
    027            float var5 = 1.0F;
    028            this.setBlockBounds(0.5F - var4, 0.0F, 0.5F - var4, 0.5F + var4, var5, 0.5F + var4);
    029        }
    030
    031        /**
    032         * Returns a bounding box from the pool of bounding boxes (this means this box can change after the pool has been
    033         * cleared to be reused)
    034         */
    035        public AxisAlignedBB getCollisionBoundingBoxFromPool(World par1World, int par2, int par3, int par4)
    036        {
    037            return null;
    038        }
    039
    040        @SideOnly(Side.CLIENT)
    041
    042        /**
    043         * Returns the bounding box of the wired rectangular prism to render.
    044         */
    045        public AxisAlignedBB getSelectedBoundingBoxFromPool(World par1World, int par2, int par3, int par4)
    046        {
    047            this.setBlockBoundsBasedOnState(par1World, par2, par3, par4);
    048            return super.getSelectedBoundingBoxFromPool(par1World, par2, par3, par4);
    049        }
    050
    051        /**
    052         * Updates the blocks bounds based on its current state. Args: world, x, y, z
    053         */
    054        public void setBlockBoundsBasedOnState(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
    055        {
    056            if (!this.isFreestanding)
    057            {
    058                int var5 = par1IBlockAccess.getBlockMetadata(par2, par3, par4);
    059                float var6 = 0.28125F;
    060                float var7 = 0.78125F;
    061                float var8 = 0.0F;
    062                float var9 = 1.0F;
    063                float var10 = 0.125F;
    064                this.setBlockBounds(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
    065
    066                if (var5 == 2)
    067                {
    068                    this.setBlockBounds(var8, var6, 1.0F - var10, var9, var7, 1.0F);
    069                }
    070
    071                if (var5 == 3)
    072                {
    073                    this.setBlockBounds(var8, var6, 0.0F, var9, var7, var10);
    074                }
    075
    076                if (var5 == 4)
    077                {
    078                    this.setBlockBounds(1.0F - var10, var6, var8, 1.0F, var7, var9);
    079                }
    080
    081                if (var5 == 5)
    082                {
    083                    this.setBlockBounds(0.0F, var6, var8, var10, var7, var9);
    084                }
    085            }
    086        }
    087
    088        /**
    089         * The type of render function that is called for this block
    090         */
    091        public int getRenderType()
    092        {
    093            return -1;
    094        }
    095
    096        /**
    097         * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
    098         */
    099        public boolean renderAsNormalBlock()
    100        {
    101            return false;
    102        }
    103
    104        public boolean getBlocksMovement(IBlockAccess par1IBlockAccess, int par2, int par3, int par4)
    105        {
    106            return true;
    107        }
    108
    109        /**
    110         * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
    111         * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
    112         */
    113        public boolean isOpaqueCube()
    114        {
    115            return false;
    116        }
    117
    118        /**
    119         * Returns a new instance of a block's tile entity class. Called on placing the block.
    120         */
    121        public TileEntity createNewTileEntity(World par1World)
    122        {
    123            try
    124            {
    125                return (TileEntity)this.signEntityClass.newInstance();
    126            }
    127            catch (Exception var3)
    128            {
    129                throw new RuntimeException(var3);
    130            }
    131        }
    132
    133        /**
    134         * Returns the ID of the items to drop on destruction.
    135         */
    136        public int idDropped(int par1, Random par2Random, int par3)
    137        {
    138            return Item.sign.shiftedIndex;
    139        }
    140
    141        /**
    142         * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
    143         * their own) Args: x, y, z, neighbor blockID
    144         */
    145        public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
    146        {
    147            boolean var6 = false;
    148
    149            if (this.isFreestanding)
    150            {
    151                if (!par1World.getBlockMaterial(par2, par3 - 1, par4).isSolid())
    152                {
    153                    var6 = true;
    154                }
    155            }
    156            else
    157            {
    158                int var7 = par1World.getBlockMetadata(par2, par3, par4);
    159                var6 = true;
    160
    161                if (var7 == 2 && par1World.getBlockMaterial(par2, par3, par4 + 1).isSolid())
    162                {
    163                    var6 = false;
    164                }
    165
    166                if (var7 == 3 && par1World.getBlockMaterial(par2, par3, par4 - 1).isSolid())
    167                {
    168                    var6 = false;
    169                }
    170
    171                if (var7 == 4 && par1World.getBlockMaterial(par2 + 1, par3, par4).isSolid())
    172                {
    173                    var6 = false;
    174                }
    175
    176                if (var7 == 5 && par1World.getBlockMaterial(par2 - 1, par3, par4).isSolid())
    177                {
    178                    var6 = false;
    179                }
    180            }
    181
    182            if (var6)
    183            {
    184                this.dropBlockAsItem(par1World, par2, par3, par4, par1World.getBlockMetadata(par2, par3, par4), 0);
    185                par1World.setBlockWithNotify(par2, par3, par4, 0);
    186            }
    187
    188            super.onNeighborBlockChange(par1World, par2, par3, par4, par5);
    189        }
    190
    191        @SideOnly(Side.CLIENT)
    192
    193        /**
    194         * only called by clickMiddleMouseButton , and passed to inventory.setCurrentItem (along with isCreative)
    195         */
    196        public int idPicked(World par1World, int par2, int par3, int par4)
    197        {
    198            return Item.sign.shiftedIndex;
    199        }
    200    }