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