package net.minecraft.src;

import net.lax1dude.eaglercraft.EaglercraftRandom;

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;
        EaglercraftRandom var25 = new EaglercraftRandom(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 var56 = MathHelper.floor_double(par8 - var31) - 1;
                    int var38 = MathHelper.floor_double(par8 + var31) + 1;
                    int var57 = 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 (var56 < 1)
                    {
                        var56 = 1;
                    }

                    if (var38 > 120)
                    {
                        var38 = 120;
                    }

                    if (var57 < 0)
                    {
                        var57 = 0;
                    }

                    if (var40 > 16)
                    {
                        var40 = 16;
                    }

                    boolean var58 = false;
                    int var42;
                    int var45;

                    for (var42 = var55; !var58 && var42 < var36; ++var42)
                    {
                        for (int var43 = var57; !var58 && var43 < var40; ++var43)
                        {
                            for (int var44 = var38 + 1; !var58 && var44 >= var56 - 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 != var56 - 1 && var42 != var55 && var42 != var36 - 1 && var43 != var57 && var43 != var40 - 1)
                                    {
                                        var44 = var56;
                                    }
                                }
                            }
                        }
                    }

                    if (!var58)
                    {
                        for (var42 = var55; var42 < var36; ++var42)
                        {
                            double var59 = ((double)(var42 + par3 * 16) + 0.5D - par6) / var29;

                            for (var45 = var57; 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 >= var56; --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);
            }
        }
    }
}
