    001package net.minecraft.world.gen;
    002
    003import java.util.Random;
    004import net.minecraft.block.Block;
    005import net.minecraft.util.MathHelper;
    006import net.minecraft.world.World;
    007
    008public class MapGenRavine extends MapGenBase
    009{
    010    private float[] field_75046_d = new float[1024];
    011
    012    protected void generateRavine(long par1, int par3, int par4, byte[] par5ArrayOfByte, double par6, double par8, double par10, float par12, float par13, float par14, int par15, int par16, double par17)
    013    {
    014        Random var19 = new Random(par1);
    015        double var20 = (double)(par3 * 16 + 8);
    016        double var22 = (double)(par4 * 16 + 8);
    017        float var24 = 0.0F;
    018        float var25 = 0.0F;
    019
    020        if (par16 <= 0)
    021        {
    022            int var26 = this.range * 16 - 16;
    023            par16 = var26 - var19.nextInt(var26 / 4);
    024        }
    025
    026        boolean var54 = false;
    027
    028        if (par15 == -1)
    029        {
    030            par15 = par16 / 2;
    031            var54 = true;
    032        }
    033
    034        float var27 = 1.0F;
    035
    036        for (int var28 = 0; var28 < 128; ++var28)
    037        {
    038            if (var28 == 0 || var19.nextInt(3) == 0)
    039            {
    040                var27 = 1.0F + var19.nextFloat() * var19.nextFloat() * 1.0F;
    041            }
    042
    043            this.field_75046_d[var28] = var27 * var27;
    044        }
    045
    046        for (; par15 < par16; ++par15)
    047        {
    048            double var53 = 1.5D + (double)(MathHelper.sin((float)par15 * (float)Math.PI / (float)par16) * par12 * 1.0F);
    049            double var30 = var53 * par17;
    050            var53 *= (double)var19.nextFloat() * 0.25D + 0.75D;
    051            var30 *= (double)var19.nextFloat() * 0.25D + 0.75D;
    052            float var32 = MathHelper.cos(par14);
    053            float var33 = MathHelper.sin(par14);
    054            par6 += (double)(MathHelper.cos(par13) * var32);
    055            par8 += (double)var33;
    056            par10 += (double)(MathHelper.sin(par13) * var32);
    057            par14 *= 0.7F;
    058            par14 += var25 * 0.05F;
    059            par13 += var24 * 0.05F;
    060            var25 *= 0.8F;
    061            var24 *= 0.5F;
    062            var25 += (var19.nextFloat() - var19.nextFloat()) * var19.nextFloat() * 2.0F;
    063            var24 += (var19.nextFloat() - var19.nextFloat()) * var19.nextFloat() * 4.0F;
    064
    065            if (var54 || var19.nextInt(4) != 0)
    066            {
    067                double var34 = par6 - var20;
    068                double var36 = par10 - var22;
    069                double var38 = (double)(par16 - par15);
    070                double var40 = (double)(par12 + 2.0F + 16.0F);
    071
    072                if (var34 * var34 + var36 * var36 - var38 * var38 > var40 * var40)
    073                {
    074                    return;
    075                }
    076
    077                if (par6 >= var20 - 16.0D - var53 * 2.0D && par10 >= var22 - 16.0D - var53 * 2.0D && par6 <= var20 + 16.0D + var53 * 2.0D && par10 <= var22 + 16.0D + var53 * 2.0D)
    078                {
    079                    int var56 = MathHelper.floor_double(par6 - var53) - par3 * 16 - 1;
    080                    int var35 = MathHelper.floor_double(par6 + var53) - par3 * 16 + 1;
    081                    int var55 = MathHelper.floor_double(par8 - var30) - 1;
    082                    int var37 = MathHelper.floor_double(par8 + var30) + 1;
    083                    int var57 = MathHelper.floor_double(par10 - var53) - par4 * 16 - 1;
    084                    int var39 = MathHelper.floor_double(par10 + var53) - par4 * 16 + 1;
    085
    086                    if (var56 < 0)
    087                    {
    088                        var56 = 0;
    089                    }
    090
    091                    if (var35 > 16)
    092                    {
    093                        var35 = 16;
    094                    }
    095
    096                    if (var55 < 1)
    097                    {
    098                        var55 = 1;
    099                    }
    100
    101                    if (var37 > 120)
    102                    {
    103                        var37 = 120;
    104                    }
    105
    106                    if (var57 < 0)
    107                    {
    108                        var57 = 0;
    109                    }
    110
    111                    if (var39 > 16)
    112                    {
    113                        var39 = 16;
    114                    }
    115
    116                    boolean var58 = false;
    117                    int var41;
    118                    int var44;
    119
    120                    for (var41 = var56; !var58 && var41 < var35; ++var41)
    121                    {
    122                        for (int var42 = var57; !var58 && var42 < var39; ++var42)
    123                        {
    124                            for (int var43 = var37 + 1; !var58 && var43 >= var55 - 1; --var43)
    125                            {
    126                                var44 = (var41 * 16 + var42) * 128 + var43;
    127
    128                                if (var43 >= 0 && var43 < 128)
    129                                {
    130                                    if (par5ArrayOfByte[var44] == Block.waterMoving.blockID || par5ArrayOfByte[var44] == Block.waterStill.blockID)
    131                                    {
    132                                        var58 = true;
    133                                    }
    134
    135                                    if (var43 != var55 - 1 && var41 != var56 && var41 != var35 - 1 && var42 != var57 && var42 != var39 - 1)
    136                                    {
    137                                        var43 = var55;
    138                                    }
    139                                }
    140                            }
    141                        }
    142                    }
    143
    144                    if (!var58)
    145                    {
    146                        for (var41 = var56; var41 < var35; ++var41)
    147                        {
    148                            double var59 = ((double)(var41 + par3 * 16) + 0.5D - par6) / var53;
    149
    150                            for (var44 = var57; var44 < var39; ++var44)
    151                            {
    152                                double var45 = ((double)(var44 + par4 * 16) + 0.5D - par10) / var53;
    153                                int var47 = (var41 * 16 + var44) * 128 + var37;
    154                                boolean var48 = false;
    155
    156                                if (var59 * var59 + var45 * var45 < 1.0D)
    157                                {
    158                                    for (int var49 = var37 - 1; var49 >= var55; --var49)
    159                                    {
    160                                        double var50 = ((double)var49 + 0.5D - par8) / var30;
    161
    162                                        if ((var59 * var59 + var45 * var45) * (double)this.field_75046_d[var49] + var50 * var50 / 6.0D < 1.0D)
    163                                        {
    164                                            byte var52 = par5ArrayOfByte[var47];
    165
    166                                            if (var52 == Block.grass.blockID)
    167                                            {
    168                                                var48 = true;
    169                                            }
    170
    171                                            if (var52 == Block.stone.blockID || var52 == Block.dirt.blockID || var52 == Block.grass.blockID)
    172                                            {
    173                                                if (var49 < 10)
    174                                                {
    175                                                    par5ArrayOfByte[var47] = (byte)Block.lavaMoving.blockID;
    176                                                }
    177                                                else
    178                                                {
    179                                                    par5ArrayOfByte[var47] = 0;
    180
    181                                                    if (var48 && par5ArrayOfByte[var47 - 1] == Block.dirt.blockID)
    182                                                    {
    183                                                        par5ArrayOfByte[var47 - 1] = this.worldObj.getBiomeGenForCoords(var41 + par3 * 16, var44 + par4 * 16).topBlock;
    184                                                    }
    185                                                }
    186                                            }
    187                                        }
    188
    189                                        --var47;
    190                                    }
    191                                }
    192                            }
    193                        }
    194
    195                        if (var54)
    196                        {
    197                            break;
    198                        }
    199                    }
    200                }
    201            }
    202        }
    203    }
    204
    205    /**
    206     * Recursively called by generate() (generate) and optionally by itself.
    207     */
    208    protected void recursiveGenerate(World par1World, int par2, int par3, int par4, int par5, byte[] par6ArrayOfByte)
    209    {
    210        if (this.rand.nextInt(50) == 0)
    211        {
    212            double var7 = (double)(par2 * 16 + this.rand.nextInt(16));
    213            double var9 = (double)(this.rand.nextInt(this.rand.nextInt(40) + 8) + 20);
    214            double var11 = (double)(par3 * 16 + this.rand.nextInt(16));
    215            byte var13 = 1;
    216
    217            for (int var14 = 0; var14 < var13; ++var14)
    218            {
    219                float var15 = this.rand.nextFloat() * (float)Math.PI * 2.0F;
    220                float var16 = (this.rand.nextFloat() - 0.5F) * 2.0F / 8.0F;
    221                float var17 = (this.rand.nextFloat() * 2.0F + this.rand.nextFloat()) * 2.0F;
    222                this.generateRavine(this.rand.nextLong(), par4, par5, par6ArrayOfByte, var7, var9, var11, var17, var15, var16, 0, 0, 3.0D);
    223            }
    224        }
    225    }
    226}