001package net.minecraft.world.gen.feature;
002
003import java.util.Random;
004import net.minecraft.block.Block;
005import net.minecraft.block.material.Material;
006import net.minecraft.world.EnumSkyBlock;
007import net.minecraft.world.World;
008import net.minecraft.world.biome.BiomeGenBase;
009
010public class WorldGenLakes extends WorldGenerator
011{
012    private int blockIndex;
013
014    public WorldGenLakes(int par1)
015    {
016        this.blockIndex = par1;
017    }
018
019    public boolean generate(World par1World, Random par2Random, int par3, int par4, int par5)
020    {
021        par3 -= 8;
022
023        for (par5 -= 8; par4 > 5 && par1World.isAirBlock(par3, par4, par5); --par4)
024        {
025            ;
026        }
027
028        if (par4 <= 4)
029        {
030            return false;
031        }
032        else
033        {
034            par4 -= 4;
035            boolean[] aboolean = new boolean[2048];
036            int l = par2Random.nextInt(4) + 4;
037            int i1;
038
039            for (i1 = 0; i1 < l; ++i1)
040            {
041                double d0 = par2Random.nextDouble() * 6.0D + 3.0D;
042                double d1 = par2Random.nextDouble() * 4.0D + 2.0D;
043                double d2 = par2Random.nextDouble() * 6.0D + 3.0D;
044                double d3 = par2Random.nextDouble() * (16.0D - d0 - 2.0D) + 1.0D + d0 / 2.0D;
045                double d4 = par2Random.nextDouble() * (8.0D - d1 - 4.0D) + 2.0D + d1 / 2.0D;
046                double d5 = par2Random.nextDouble() * (16.0D - d2 - 2.0D) + 1.0D + d2 / 2.0D;
047
048                for (int j1 = 1; j1 < 15; ++j1)
049                {
050                    for (int k1 = 1; k1 < 15; ++k1)
051                    {
052                        for (int l1 = 1; l1 < 7; ++l1)
053                        {
054                            double d6 = ((double)j1 - d3) / (d0 / 2.0D);
055                            double d7 = ((double)l1 - d4) / (d1 / 2.0D);
056                            double d8 = ((double)k1 - d5) / (d2 / 2.0D);
057                            double d9 = d6 * d6 + d7 * d7 + d8 * d8;
058
059                            if (d9 < 1.0D)
060                            {
061                                aboolean[(j1 * 16 + k1) * 8 + l1] = true;
062                            }
063                        }
064                    }
065                }
066            }
067
068            int i2;
069            int j2;
070            boolean flag;
071
072            for (i1 = 0; i1 < 16; ++i1)
073            {
074                for (j2 = 0; j2 < 16; ++j2)
075                {
076                    for (i2 = 0; i2 < 8; ++i2)
077                    {
078                        flag = !aboolean[(i1 * 16 + j2) * 8 + i2] && (i1 < 15 && aboolean[((i1 + 1) * 16 + j2) * 8 + i2] || i1 > 0 && aboolean[((i1 - 1) * 16 + j2) * 8 + i2] || j2 < 15 && aboolean[(i1 * 16 + j2 + 1) * 8 + i2] || j2 > 0 && aboolean[(i1 * 16 + (j2 - 1)) * 8 + i2] || i2 < 7 && aboolean[(i1 * 16 + j2) * 8 + i2 + 1] || i2 > 0 && aboolean[(i1 * 16 + j2) * 8 + (i2 - 1)]);
079
080                        if (flag)
081                        {
082                            Material material = par1World.getBlockMaterial(par3 + i1, par4 + i2, par5 + j2);
083
084                            if (i2 >= 4 && material.isLiquid())
085                            {
086                                return false;
087                            }
088
089                            if (i2 < 4 && !material.isSolid() && par1World.getBlockId(par3 + i1, par4 + i2, par5 + j2) != this.blockIndex)
090                            {
091                                return false;
092                            }
093                        }
094                    }
095                }
096            }
097
098            for (i1 = 0; i1 < 16; ++i1)
099            {
100                for (j2 = 0; j2 < 16; ++j2)
101                {
102                    for (i2 = 0; i2 < 8; ++i2)
103                    {
104                        if (aboolean[(i1 * 16 + j2) * 8 + i2])
105                        {
106                            par1World.setBlockAndMetadataWithNotify(par3 + i1, par4 + i2, par5 + j2, i2 >= 4 ? 0 : this.blockIndex, 0, 2);
107                        }
108                    }
109                }
110            }
111
112            for (i1 = 0; i1 < 16; ++i1)
113            {
114                for (j2 = 0; j2 < 16; ++j2)
115                {
116                    for (i2 = 4; i2 < 8; ++i2)
117                    {
118                        if (aboolean[(i1 * 16 + j2) * 8 + i2] && par1World.getBlockId(par3 + i1, par4 + i2 - 1, par5 + j2) == Block.dirt.blockID && par1World.getSavedLightValue(EnumSkyBlock.Sky, par3 + i1, par4 + i2, par5 + j2) > 0)
119                        {
120                            BiomeGenBase biomegenbase = par1World.getBiomeGenForCoords(par3 + i1, par5 + j2);
121
122                            if (biomegenbase.topBlock == Block.mycelium.blockID)
123                            {
124                                par1World.setBlockAndMetadataWithNotify(par3 + i1, par4 + i2 - 1, par5 + j2, Block.mycelium.blockID, 0, 2);
125                            }
126                            else
127                            {
128                                par1World.setBlockAndMetadataWithNotify(par3 + i1, par4 + i2 - 1, par5 + j2, Block.grass.blockID, 0, 2);
129                            }
130                        }
131                    }
132                }
133            }
134
135            if (Block.blocksList[this.blockIndex].blockMaterial == Material.lava)
136            {
137                for (i1 = 0; i1 < 16; ++i1)
138                {
139                    for (j2 = 0; j2 < 16; ++j2)
140                    {
141                        for (i2 = 0; i2 < 8; ++i2)
142                        {
143                            flag = !aboolean[(i1 * 16 + j2) * 8 + i2] && (i1 < 15 && aboolean[((i1 + 1) * 16 + j2) * 8 + i2] || i1 > 0 && aboolean[((i1 - 1) * 16 + j2) * 8 + i2] || j2 < 15 && aboolean[(i1 * 16 + j2 + 1) * 8 + i2] || j2 > 0 && aboolean[(i1 * 16 + (j2 - 1)) * 8 + i2] || i2 < 7 && aboolean[(i1 * 16 + j2) * 8 + i2 + 1] || i2 > 0 && aboolean[(i1 * 16 + j2) * 8 + (i2 - 1)]);
144
145                            if (flag && (i2 < 4 || par2Random.nextInt(2) != 0) && par1World.getBlockMaterial(par3 + i1, par4 + i2, par5 + j2).isSolid())
146                            {
147                                par1World.setBlockAndMetadataWithNotify(par3 + i1, par4 + i2, par5 + j2, Block.stone.blockID, 0, 2);
148                            }
149                        }
150                    }
151                }
152            }
153
154            if (Block.blocksList[this.blockIndex].blockMaterial == Material.water)
155            {
156                for (i1 = 0; i1 < 16; ++i1)
157                {
158                    for (j2 = 0; j2 < 16; ++j2)
159                    {
160                        byte b0 = 4;
161
162                        if (par1World.isBlockFreezable(par3 + i1, par4 + b0, par5 + j2))
163                        {
164                            par1World.setBlockAndMetadataWithNotify(par3 + i1, par4 + b0, par5 + j2, Block.ice.blockID, 0, 2);
165                        }
166                    }
167                }
168            }
169
170            return true;
171        }
172    }
173}