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