package net.minecraft.world.gen;
import java.util.Random;
import net.minecraft.block.Block;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;
public class MapGenCaves extends MapGenBase
{
/**
* Generates a larger initial cave node than usual. Called 25% of the time.
*/
protected void generateLargeCaveNode(long par1, int par3, int par4, byte[] par5ArrayOfByte, double par6, double par8, double par10)
{
this.generateCaveNode(par1, par3, par4, par5ArrayOfByte, par6, par8, par10, 1.0F + this.rand.nextFloat() * 6.0F, 0.0F, 0.0F, -1, -1, 0.5D);
}
/**
* Generates a node in the current cave system recursion tree.
*/
protected void generateCaveNode(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)
{
double var19 = (double)(par3 * 16 + 8);
double var21 = (double)(par4 * 16 + 8);
float var23 = 0.0F;
float var24 = 0.0F;
Random var25 = new Random(par1);
if (par16 <= 0)
{
int var26 = this.range * 16 - 16;
par16 = var26 - var25.nextInt(var26 / 4);
}
boolean var54 = false;
if (par15 == -1)
{
par15 = par16 / 2;
var54 = true;
}
int var27 = var25.nextInt(par16 / 2) + par16 / 4;
for (boolean var28 = var25.nextInt(6) == 0; par15 < par16; ++par15)
{
double var29 = 1.5D + (double)(MathHelper.sin((float)par15 * (float)Math.PI / (float)par16) * par12 * 1.0F);
double var31 = var29 * par17;
float var33 = MathHelper.cos(par14);
float var34 = MathHelper.sin(par14);
par6 += (double)(MathHelper.cos(par13) * var33);
par8 += (double)var34;
par10 += (double)(MathHelper.sin(par13) * var33);
if (var28)
{
par14 *= 0.92F;
}
else
{
par14 *= 0.7F;
}
par14 += var24 * 0.1F;
par13 += var23 * 0.1F;
var24 *= 0.9F;
var23 *= 0.75F;
var24 += (var25.nextFloat() - var25.nextFloat()) * var25.nextFloat() * 2.0F;
var23 += (var25.nextFloat() - var25.nextFloat()) * var25.nextFloat() * 4.0F;
if (!var54 && par15 == var27 && par12 > 1.0F && par16 > 0)
{
this.generateCaveNode(var25.nextLong(), par3, par4, par5ArrayOfByte, par6, par8, par10, var25.nextFloat() * 0.5F + 0.5F, par13 - ((float)Math.PI / 2F), par14 / 3.0F, par15, par16, 1.0D);
this.generateCaveNode(var25.nextLong(), par3, par4, par5ArrayOfByte, par6, par8, par10, var25.nextFloat() * 0.5F + 0.5F, par13 + ((float)Math.PI / 2F), par14 / 3.0F, par15, par16, 1.0D);
return;
}
if (var54 || var25.nextInt(4) != 0)
{
double var35 = par6 - var19;
double var37 = par10 - var21;
double var39 = (double)(par16 - par15);
double var41 = (double)(par12 + 2.0F + 16.0F);
if (var35 * var35 + var37 * var37 - var39 * var39 > var41 * var41)
{
return;
}
if (par6 >= var19 - 16.0D - var29 * 2.0D && par10 >= var21 - 16.0D - var29 * 2.0D && par6 <= var19 + 16.0D + var29 * 2.0D && par10 <= var21 + 16.0D + var29 * 2.0D)
{
int var55 = MathHelper.floor_double(par6 - var29) - par3 * 16 - 1;
int var36 = MathHelper.floor_double(par6 + var29) - par3 * 16 + 1;
int var57 = MathHelper.floor_double(par8 - var31) - 1;
int var38 = MathHelper.floor_double(par8 + var31) + 1;
int var56 = MathHelper.floor_double(par10 - var29) - par4 * 16 - 1;
int var40 = MathHelper.floor_double(par10 + var29) - par4 * 16 + 1;
if (var55 < 0)
{
var55 = 0;
}
if (var36 > 16)
{
var36 = 16;
}
if (var57 < 1)
{
var57 = 1;
}
if (var38 > 120)
{
var38 = 120;
}
if (var56 < 0)
{
var56 = 0;
}
if (var40 > 16)
{
var40 = 16;
}
boolean var58 = false;
int var42;
int var45;
for (var42 = var55; !var58 && var42 < var36; ++var42)
{
for (int var43 = var56; !var58 && var43 < var40; ++var43)
{
for (int var44 = var38 + 1; !var58 && var44 >= var57 - 1; --var44)
{
var45 = (var42 * 16 + var43) * 128 + var44;
if (var44 >= 0 && var44 < 128)
{
if (par5ArrayOfByte[var45] == Block.waterMoving.blockID || par5ArrayOfByte[var45] == Block.waterStill.blockID)
{
var58 = true;
}
if (var44 != var57 - 1 && var42 != var55 && var42 != var36 - 1 && var43 != var56 && var43 != var40 - 1)
{
var44 = var57;
}
}
}
}
}
if (!var58)
{
for (var42 = var55; var42 < var36; ++var42)
{
double var59 = ((double)(var42 + par3 * 16) + 0.5D - par6) / var29;
for (var45 = var56; var45 < var40; ++var45)
{
double var46 = ((double)(var45 + par4 * 16) + 0.5D - par10) / var29;
int var48 = (var42 * 16 + var45) * 128 + var38;
boolean var49 = false;
if (var59 * var59 + var46 * var46 < 1.0D)
{
for (int var50 = var38 - 1; var50 >= var57; --var50)
{
double var51 = ((double)var50 + 0.5D - par8) / var31;
if (var51 > -0.7D && var59 * var59 + var51 * var51 + var46 * var46 < 1.0D)
{
byte var53 = par5ArrayOfByte[var48];
if (var53 == Block.grass.blockID)
{
var49 = true;
}
if (var53 == Block.stone.blockID || var53 == Block.dirt.blockID || var53 == Block.grass.blockID)
{
if (var50 < 10)
{
par5ArrayOfByte[var48] = (byte)Block.lavaMoving.blockID;
}
else
{
par5ArrayOfByte[var48] = 0;
if (var49 && par5ArrayOfByte[var48 - 1] == Block.dirt.blockID)
{
par5ArrayOfByte[var48 - 1] = this.worldObj.getBiomeGenForCoords(var42 + par3 * 16, var45 + par4 * 16).topBlock;
}
}
}
}
--var48;
}
}
}
}
if (var54)
{
break;
}
}
}
}
}
}
/**
* Recursively called by generate() (generate) and optionally by itself.
*/
protected void recursiveGenerate(World par1World, int par2, int par3, int par4, int par5, byte[] par6ArrayOfByte)
{
int var7 = this.rand.nextInt(this.rand.nextInt(this.rand.nextInt(40) + 1) + 1);
if (this.rand.nextInt(15) != 0)
{
var7 = 0;
}
for (int var8 = 0; var8 < var7; ++var8)
{
double var9 = (double)(par2 * 16 + this.rand.nextInt(16));
double var11 = (double)this.rand.nextInt(this.rand.nextInt(120) + 8);
double var13 = (double)(par3 * 16 + this.rand.nextInt(16));
int var15 = 1;
if (this.rand.nextInt(4) == 0)
{
this.generateLargeCaveNode(this.rand.nextLong(), par4, par5, par6ArrayOfByte, var9, var11, var13);
var15 += this.rand.nextInt(4);
}
for (int var16 = 0; var16 < var15; ++var16)
{
float var17 = this.rand.nextFloat() * (float)Math.PI * 2.0F;
float var18 = (this.rand.nextFloat() - 0.5F) * 2.0F / 8.0F;
float var19 = this.rand.nextFloat() * 2.0F + this.rand.nextFloat();
if (this.rand.nextInt(10) == 0)
{
var19 *= this.rand.nextFloat() * this.rand.nextFloat() * 3.0F + 1.0F;
}
this.generateCaveNode(this.rand.nextLong(), par4, par5, par6ArrayOfByte, var9, var11, var13, var19, var17, var18, 0, 0, 1.0D);
}
}
}
}