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 BlockDragonEgg extends Block
008    {
009        public BlockDragonEgg(int par1, int par2)
010        {
011            super(par1, par2, Material.dragonEgg);
012        }
013    
014        /**
015         * Called whenever the block is added into the world. Args: world, x, y, z
016         */
017        public void onBlockAdded(World par1World, int par2, int par3, int par4)
018        {
019            par1World.scheduleBlockUpdate(par2, par3, par4, this.blockID, this.tickRate());
020        }
021    
022        /**
023         * Lets the block know when one of its neighbor changes. Doesn't know which neighbor changed (coordinates passed are
024         * their own) Args: x, y, z, neighbor blockID
025         */
026        public void onNeighborBlockChange(World par1World, int par2, int par3, int par4, int par5)
027        {
028            par1World.scheduleBlockUpdate(par2, par3, par4, this.blockID, this.tickRate());
029        }
030    
031        /**
032         * Ticks the block if it's been scheduled
033         */
034        public void updateTick(World par1World, int par2, int par3, int par4, Random par5Random)
035        {
036            this.fallIfPossible(par1World, par2, par3, par4);
037        }
038    
039        /**
040         * Checks if the dragon egg can fall down, and if so, makes it fall.
041         */
042        private void fallIfPossible(World par1World, int par2, int par3, int par4)
043        {
044            if (BlockSand.canFallBelow(par1World, par2, par3 - 1, par4) && par3 >= 0)
045            {
046                byte var5 = 32;
047    
048                if (!BlockSand.fallInstantly && par1World.checkChunksExist(par2 - var5, par3 - var5, par4 - var5, par2 + var5, par3 + var5, par4 + var5))
049                {
050                    EntityFallingSand var6 = new EntityFallingSand(par1World, (double)((float)par2 + 0.5F), (double)((float)par3 + 0.5F), (double)((float)par4 + 0.5F), this.blockID);
051                    par1World.spawnEntityInWorld(var6);
052                }
053                else
054                {
055                    par1World.setBlockWithNotify(par2, par3, par4, 0);
056    
057                    while (BlockSand.canFallBelow(par1World, par2, par3 - 1, par4) && par3 > 0)
058                    {
059                        --par3;
060                    }
061    
062                    if (par3 > 0)
063                    {
064                        par1World.setBlockWithNotify(par2, par3, par4, this.blockID);
065                    }
066                }
067            }
068        }
069    
070        /**
071         * Called upon block activation (right click on the block.)
072         */
073        public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
074        {
075            this.teleportNearby(par1World, par2, par3, par4);
076            return true;
077        }
078    
079        /**
080         * Called when the block is clicked by a player. Args: x, y, z, entityPlayer
081         */
082        public void onBlockClicked(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer)
083        {
084            this.teleportNearby(par1World, par2, par3, par4);
085        }
086    
087        /**
088         * Teleports the dragon egg somewhere else in a 31x19x31 area centered on the egg.
089         */
090        private void teleportNearby(World par1World, int par2, int par3, int par4)
091        {
092            if (par1World.getBlockId(par2, par3, par4) == this.blockID)
093            {
094                for (int var5 = 0; var5 < 1000; ++var5)
095                {
096                    int var6 = par2 + par1World.rand.nextInt(16) - par1World.rand.nextInt(16);
097                    int var7 = par3 + par1World.rand.nextInt(8) - par1World.rand.nextInt(8);
098                    int var8 = par4 + par1World.rand.nextInt(16) - par1World.rand.nextInt(16);
099    
100                    if (par1World.getBlockId(var6, var7, var8) == 0)
101                    {
102                        if (!par1World.isRemote)
103                        {
104                            par1World.setBlockAndMetadataWithNotify(var6, var7, var8, this.blockID, par1World.getBlockMetadata(par2, par3, par4));
105                            par1World.setBlockWithNotify(par2, par3, par4, 0);
106                        }
107                        else
108                        {
109                            short var9 = 128;
110    
111                            for (int var10 = 0; var10 < var9; ++var10)
112                            {
113                                double var11 = par1World.rand.nextDouble();
114                                float var13 = (par1World.rand.nextFloat() - 0.5F) * 0.2F;
115                                float var14 = (par1World.rand.nextFloat() - 0.5F) * 0.2F;
116                                float var15 = (par1World.rand.nextFloat() - 0.5F) * 0.2F;
117                                double var16 = (double)var6 + (double)(par2 - var6) * var11 + (par1World.rand.nextDouble() - 0.5D) * 1.0D + 0.5D;
118                                double var18 = (double)var7 + (double)(par3 - var7) * var11 + par1World.rand.nextDouble() * 1.0D - 0.5D;
119                                double var20 = (double)var8 + (double)(par4 - var8) * var11 + (par1World.rand.nextDouble() - 0.5D) * 1.0D + 0.5D;
120                                par1World.spawnParticle("portal", var16, var18, var20, (double)var13, (double)var14, (double)var15);
121                            }
122                        }
123    
124                        return;
125                    }
126                }
127            }
128        }
129    
130        /**
131         * How many world ticks before ticking
132         */
133        public int tickRate()
134        {
135            return 5;
136        }
137    
138        /**
139         * Is this block (a) opaque and (b) a full 1m cube?  This determines whether or not to render the shared face of two
140         * adjacent blocks and also whether the player can attach torches, redstone wire, etc to this block.
141         */
142        public boolean isOpaqueCube()
143        {
144            return false;
145        }
146    
147        /**
148         * If this block doesn't render as an ordinary block it will return False (examples: signs, buttons, stairs, etc)
149         */
150        public boolean renderAsNormalBlock()
151        {
152            return false;
153        }
154    
155        @SideOnly(Side.CLIENT)
156    
157        /**
158         * Returns true if the given side of this block type should be rendered, if the adjacent block is at the given
159         * coordinates.  Args: blockAccess, x, y, z, side
160         */
161        public boolean shouldSideBeRendered(IBlockAccess par1IBlockAccess, int par2, int par3, int par4, int par5)
162        {
163            return true;
164        }
165    
166        /**
167         * The type of render function that is called for this block
168         */
169        public int getRenderType()
170        {
171            return 27;
172        }
173    
174        @SideOnly(Side.CLIENT)
175    
176        /**
177         * only called by clickMiddleMouseButton , and passed to inventory.setCurrentItem (along with isCreative)
178         */
179        public int idPicked(World par1World, int par2, int par3, int par4)
180        {
181            return 0;
182        }
183    }