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 }