001    package net.minecraft.src;
002    
003    import java.util.Random;
004    
005    public class WorldGenSpikes extends WorldGenerator
006    {
007        /**
008         * The Block ID that the generator is allowed to replace while generating the terrain.
009         */
010        private int replaceID;
011    
012        public WorldGenSpikes(int par1)
013        {
014            this.replaceID = par1;
015        }
016    
017        public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
018        {
019            if (par1World.isAirBlock(par3, par4, par5) && par1World.getBlockId(par3, par4 - 1, par5) == this.replaceID)
020            {
021                int var6 = par2Random.nextInt(32) + 6;
022                int var7 = par2Random.nextInt(4) + 1;
023                int var8;
024                int var9;
025                int var10;
026                int var11;
027    
028                for (var8 = par3 - var7; var8 <= par3 + var7; ++var8)
029                {
030                    for (var9 = par5 - var7; var9 <= par5 + var7; ++var9)
031                    {
032                        var10 = var8 - par3;
033                        var11 = var9 - par5;
034    
035                        if (var10 * var10 + var11 * var11 <= var7 * var7 + 1 && par1World.getBlockId(var8, par4 - 1, var9) != this.replaceID)
036                        {
037                            return false;
038                        }
039                    }
040                }
041    
042                for (var8 = par4; var8 < par4 + var6 && var8 < 128; ++var8)
043                {
044                    for (var9 = par3 - var7; var9 <= par3 + var7; ++var9)
045                    {
046                        for (var10 = par5 - var7; var10 <= par5 + var7; ++var10)
047                        {
048                            var11 = var9 - par3;
049                            int var12 = var10 - par5;
050    
051                            if (var11 * var11 + var12 * var12 <= var7 * var7 + 1)
052                            {
053                                par1World.setBlockWithNotify(var9, var8, var10, Block.obsidian.blockID);
054                            }
055                        }
056                    }
057                }
058    
059                EntityEnderCrystal var13 = new EntityEnderCrystal(par1World);
060                var13.setLocationAndAngles((double)((float)par3 + 0.5F), (double)(par4 + var6), (double)((float)par5 + 0.5F), par2Random.nextFloat() * 360.0F, 0.0F);
061                par1World.spawnEntityInWorld(var13);
062                par1World.setBlockWithNotify(par3, par4 + var6, par5, Block.bedrock.blockID);
063                return true;
064            }
065            else
066            {
067                return false;
068            }
069        }
070    }