    001    package net.minecraft.world.gen;
    002
    003    import java.util.Random;
    004    import net.minecraft.block.Block;
    005    import net.minecraft.util.MathHelper;
    006    import net.minecraft.world.World;
    007
    008    public class MapGenCavesHell extends MapGenBase
    009    {
    010        /**
    011         * Generates a larger initial cave node than usual. Called 25% of the time.
    012         */
    013        protected void generateLargeCaveNode(int par1, int par2, byte[] par3ArrayOfByte, double par4, double par6, double par8)
    014        {
    015            this.generateCaveNode(par1, par2, par3ArrayOfByte, par4, par6, par8, 1.0F + this.rand.nextFloat() * 6.0F, 0.0F, 0.0F, -1, -1, 0.5D);
    016        }
    017
    018        /**
    019         * Generates a node in the current cave system recursion tree.
    020         */
    021        protected void generateCaveNode(int par1, int par2, byte[] par3ArrayOfByte, double par4, double par6, double par8, float par10, float par11, float par12, int par13, int par14, double par15)
    022        {
    023            double var17 = (double)(par1 * 16 + 8);
    024            double var19 = (double)(par2 * 16 + 8);
    025            float var21 = 0.0F;
    026            float var22 = 0.0F;
    027            Random var23 = new Random(this.rand.nextLong());
    028
    029            if (par14 <= 0)
    030            {
    031                int var24 = this.range * 16 - 16;
    032                par14 = var24 - var23.nextInt(var24 / 4);
    033            }
    034
    035            boolean var51 = false;
    036
    037            if (par13 == -1)
    038            {
    039                par13 = par14 / 2;
    040                var51 = true;
    041            }
    042
    043            int var25 = var23.nextInt(par14 / 2) + par14 / 4;
    044
    045            for (boolean var26 = var23.nextInt(6) == 0; par13 < par14; ++par13)
    046            {
    047                double var27 = 1.5D + (double)(MathHelper.sin((float)par13 * (float)Math.PI / (float)par14) * par10 * 1.0F);
    048                double var29 = var27 * par15;
    049                float var31 = MathHelper.cos(par12);
    050                float var32 = MathHelper.sin(par12);
    051                par4 += (double)(MathHelper.cos(par11) * var31);
    052                par6 += (double)var32;
    053                par8 += (double)(MathHelper.sin(par11) * var31);
    054
    055                if (var26)
    056                {
    057                    par12 *= 0.92F;
    058                }
    059                else
    060                {
    061                    par12 *= 0.7F;
    062                }
    063
    064                par12 += var22 * 0.1F;
    065                par11 += var21 * 0.1F;
    066                var22 *= 0.9F;
    067                var21 *= 0.75F;
    068                var22 += (var23.nextFloat() - var23.nextFloat()) * var23.nextFloat() * 2.0F;
    069                var21 += (var23.nextFloat() - var23.nextFloat()) * var23.nextFloat() * 4.0F;
    070
    071                if (!var51 && par13 == var25 && par10 > 1.0F)
    072                {
    073                    this.generateCaveNode(par1, par2, par3ArrayOfByte, par4, par6, par8, var23.nextFloat() * 0.5F + 0.5F, par11 - ((float)Math.PI / 2F), par12 / 3.0F, par13, par14, 1.0D);
    074                    this.generateCaveNode(par1, par2, par3ArrayOfByte, par4, par6, par8, var23.nextFloat() * 0.5F + 0.5F, par11 + ((float)Math.PI / 2F), par12 / 3.0F, par13, par14, 1.0D);
    075                    return;
    076                }
    077
    078                if (var51 || var23.nextInt(4) != 0)
    079                {
    080                    double var33 = par4 - var17;
    081                    double var35 = par8 - var19;
    082                    double var37 = (double)(par14 - par13);
    083                    double var39 = (double)(par10 + 2.0F + 16.0F);
    084
    085                    if (var33 * var33 + var35 * var35 - var37 * var37 > var39 * var39)
    086                    {
    087                        return;
    088                    }
    089
    090                    if (par4 >= var17 - 16.0D - var27 * 2.0D && par8 >= var19 - 16.0D - var27 * 2.0D && par4 <= var17 + 16.0D + var27 * 2.0D && par8 <= var19 + 16.0D + var27 * 2.0D)
    091                    {
    092                        int var52 = MathHelper.floor_double(par4 - var27) - par1 * 16 - 1;
    093                        int var34 = MathHelper.floor_double(par4 + var27) - par1 * 16 + 1;
    094                        int var53 = MathHelper.floor_double(par6 - var29) - 1;
    095                        int var36 = MathHelper.floor_double(par6 + var29) + 1;
    096                        int var55 = MathHelper.floor_double(par8 - var27) - par2 * 16 - 1;
    097                        int var38 = MathHelper.floor_double(par8 + var27) - par2 * 16 + 1;
    098
    099                        if (var52 < 0)
    100                        {
    101                            var52 = 0;
    102                        }
    103
    104                        if (var34 > 16)
    105                        {
    106                            var34 = 16;
    107                        }
    108
    109                        if (var53 < 1)
    110                        {
    111                            var53 = 1;
    112                        }
    113
    114                        if (var36 > 120)
    115                        {
    116                            var36 = 120;
    117                        }
    118
    119                        if (var55 < 0)
    120                        {
    121                            var55 = 0;
    122                        }
    123
    124                        if (var38 > 16)
    125                        {
    126                            var38 = 16;
    127                        }
    128
    129                        boolean var54 = false;
    130                        int var43;
    131                        int var40;
    132
    133                        for (var40 = var52; !var54 && var40 < var34; ++var40)
    134                        {
    135                            for (int var41 = var55; !var54 && var41 < var38; ++var41)
    136                            {
    137                                for (int var42 = var36 + 1; !var54 && var42 >= var53 - 1; --var42)
    138                                {
    139                                    var43 = (var40 * 16 + var41) * 128 + var42;
    140
    141                                    if (var42 >= 0 && var42 < 128)
    142                                    {
    143                                        if (par3ArrayOfByte[var43] == Block.lavaMoving.blockID || par3ArrayOfByte[var43] == Block.lavaStill.blockID)
    144                                        {
    145                                            var54 = true;
    146                                        }
    147
    148                                        if (var42 != var53 - 1 && var40 != var52 && var40 != var34 - 1 && var41 != var55 && var41 != var38 - 1)
    149                                        {
    150                                            var42 = var53;
    151                                        }
    152                                    }
    153                                }
    154                            }
    155                        }
    156
    157                        if (!var54)
    158                        {
    159                            for (var40 = var52; var40 < var34; ++var40)
    160                            {
    161                                double var56 = ((double)(var40 + par1 * 16) + 0.5D - par4) / var27;
    162
    163                                for (var43 = var55; var43 < var38; ++var43)
    164                                {
    165                                    double var44 = ((double)(var43 + par2 * 16) + 0.5D - par8) / var27;
    166                                    int var46 = (var40 * 16 + var43) * 128 + var36;
    167
    168                                    for (int var47 = var36 - 1; var47 >= var53; --var47)
    169                                    {
    170                                        double var48 = ((double)var47 + 0.5D - par6) / var29;
    171
    172                                        if (var48 > -0.7D && var56 * var56 + var48 * var48 + var44 * var44 < 1.0D)
    173                                        {
    174                                            byte var50 = par3ArrayOfByte[var46];
    175
    176                                            if (var50 == Block.netherrack.blockID || var50 == Block.dirt.blockID || var50 == Block.grass.blockID)
    177                                            {
    178                                                par3ArrayOfByte[var46] = 0;
    179                                            }
    180                                        }
    181
    182                                        --var46;
    183                                    }
    184                                }
    185                            }
    186
    187                            if (var51)
    188                            {
    189                                break;
    190                            }
    191                        }
    192                    }
    193                }
    194            }
    195        }
    196
    197        /**
    198         * Recursively called by generate() (generate) and optionally by itself.
    199         */
    200        protected void recursiveGenerate(World par1World, int par2, int par3, int par4, int par5, byte[] par6ArrayOfByte)
    201        {
    202            int var7 = this.rand.nextInt(this.rand.nextInt(this.rand.nextInt(10) + 1) + 1);
    203
    204            if (this.rand.nextInt(5) != 0)
    205            {
    206                var7 = 0;
    207            }
    208
    209            for (int var8 = 0; var8 < var7; ++var8)
    210            {
    211                double var9 = (double)(par2 * 16 + this.rand.nextInt(16));
    212                double var11 = (double)this.rand.nextInt(128);
    213                double var13 = (double)(par3 * 16 + this.rand.nextInt(16));
    214                int var15 = 1;
    215
    216                if (this.rand.nextInt(4) == 0)
    217                {
    218                    this.generateLargeCaveNode(par4, par5, par6ArrayOfByte, var9, var11, var13);
    219                    var15 += this.rand.nextInt(4);
    220                }
    221
    222                for (int var16 = 0; var16 < var15; ++var16)
    223                {
    224                    float var17 = this.rand.nextFloat() * (float)Math.PI * 2.0F;
    225                    float var18 = (this.rand.nextFloat() - 0.5F) * 2.0F / 8.0F;
    226                    float var19 = this.rand.nextFloat() * 2.0F + this.rand.nextFloat();
    227                    this.generateCaveNode(par4, par5, par6ArrayOfByte, var9, var11, var13, var19 * 2.0F, var17, var18, 0, 0, 0.5D);
    228                }
    229            }
    230        }
    231    }