001package net.minecraft.world.gen.feature;
002
003import java.util.Random;
004import net.minecraft.block.Block;
005import net.minecraft.entity.item.EntityEnderCrystal;
006import net.minecraft.world.World;
007
008public class WorldGenSpikes extends WorldGenerator
009{
010    /**
011     * The Block ID that the generator is allowed to replace while generating the terrain.
012     */
013    private int replaceID;
014
015    public WorldGenSpikes(int par1)
016    {
017        this.replaceID = par1;
018    }
019
020    public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
021    {
022        if (par1World.isAirBlock(par3, par4, par5) && par1World.getBlockId(par3, par4 - 1, par5) == this.replaceID)
023        {
024            int var6 = par2Random.nextInt(32) + 6;
025            int var7 = par2Random.nextInt(4) + 1;
026            int var8;
027            int var9;
028            int var10;
029            int var11;
030
031            for (var8 = par3 - var7; var8 <= par3 + var7; ++var8)
032            {
033                for (var9 = par5 - var7; var9 <= par5 + var7; ++var9)
034                {
035                    var10 = var8 - par3;
036                    var11 = var9 - par5;
037
038                    if (var10 * var10 + var11 * var11 <= var7 * var7 + 1 && par1World.getBlockId(var8, par4 - 1, var9) != this.replaceID)
039                    {
040                        return false;
041                    }
042                }
043            }
044
045            for (var8 = par4; var8 < par4 + var6 && var8 < 128; ++var8)
046            {
047                for (var9 = par3 - var7; var9 <= par3 + var7; ++var9)
048                {
049                    for (var10 = par5 - var7; var10 <= par5 + var7; ++var10)
050                    {
051                        var11 = var9 - par3;
052                        int var12 = var10 - par5;
053
054                        if (var11 * var11 + var12 * var12 <= var7 * var7 + 1)
055                        {
056                            par1World.setBlockWithNotify(var9, var8, var10, Block.obsidian.blockID);
057                        }
058                    }
059                }
060            }
061
062            EntityEnderCrystal var13 = new EntityEnderCrystal(par1World);
063            var13.setLocationAndAngles((double)((float)par3 + 0.5F), (double)(par4 + var6), (double)((float)par5 + 0.5F), par2Random.nextFloat() * 360.0F, 0.0F);
064            par1World.spawnEntityInWorld(var13);
065            par1World.setBlockWithNotify(par3, par4 + var6, par5, Block.bedrock.blockID);
066            return true;
067        }
068        else
069        {
070            return false;
071        }
072    }
073}