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}