common/universalelectricity/prefab/ore/OreGenReplace.java

package universalelectricity.prefab.ore;

import java.util.Random;

import net.minecraft.item.ItemStack;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.ChunkProviderEnd;
import net.minecraft.world.gen.ChunkProviderGenerate;
import net.minecraft.world.gen.ChunkProviderHell;

/**
 * This class is used for storing ore generation data. If you are too lazy to generate your own
 * ores, you can do {@link #OreGenerator.ORES_TO_GENERATE.add()} to add your ore to the list of ores
 * to generate.
 * 
 * @author Calclavia
 * 
 */
public class OreGenReplace extends OreGenBase
{

	public int minGenerateLevel;
	public int maxGenerateLevel;
	public int amountPerChunk;
	public int amountPerBranch;
	public int replaceID;

	/**
	 * Dimensions to ignore ore generation
	 */
	public boolean ignoreSurface = false;
	public boolean ignoreNether = true;
	public boolean ignoreEnd = true;

	/**
	 * @param name - The name of the ore for display
	 * @param textureFile - The 16x16 png texture of your ore to override
	 * @param minGenerateLevel - The highest generation level of your ore
	 * @param maxGenerateLevel - The lowest generation level of your ore
	 * @param amountPerChunk - The amount of ores to generate per chunk
	 * @param amountPerBranch - The amount of ores to generate in a clutter. E.g coal generates with
	 * a lot of other coal next to it. How much do you want?
	 */
	public OreGenReplace(String name, String oreDiectionaryName, ItemStack stack, int replaceID, int minGenerateLevel, int maxGenerateLevel, int amountPerChunk, int amountPerBranch, String harvestTool, int harvestLevel)
	{
		super(name, oreDiectionaryName, stack, harvestTool, harvestLevel);
		this.minGenerateLevel = minGenerateLevel;
		this.maxGenerateLevel = maxGenerateLevel;
		this.amountPerChunk = amountPerChunk;
		this.amountPerBranch = amountPerBranch;
		this.replaceID = replaceID;
	}

	@Override
	public void generate(World world, Random random, int varX, int varZ)
	{
		try
		{
			for (int i = 0; i < this.amountPerChunk; i++)
			{
				int x = varX + random.nextInt(16);
				int z = varZ + random.nextInt(16);
				int y = random.nextInt(Math.max(this.maxGenerateLevel - this.minGenerateLevel, 0)) + this.minGenerateLevel;
				this.generateReplace(world, random, x, y, z);
			}
		}
		catch (Exception e)
		{
			System.out.println("Error generating ore: " + this.name);
			e.printStackTrace();
		}
	}

	public boolean generateReplace(World par1World, Random par2Random, int par3, int par4, int par5)
	{
		float var6 = par2Random.nextFloat() * (float) Math.PI;
		double var7 = par3 + 8 + MathHelper.sin(var6) * this.amountPerBranch / 8.0F;
		double var9 = par3 + 8 - MathHelper.sin(var6) * this.amountPerBranch / 8.0F;
		double var11 = par5 + 8 + MathHelper.cos(var6) * this.amountPerBranch / 8.0F;
		double var13 = par5 + 8 - MathHelper.cos(var6) * this.amountPerBranch / 8.0F;
		double var15 = par4 + par2Random.nextInt(3) - 2;
		double var17 = par4 + par2Random.nextInt(3) - 2;

		for (int var19 = 0; var19 <= this.amountPerBranch; ++var19)
		{
			double var20 = var7 + (var9 - var7) * var19 / this.amountPerBranch;
			double var22 = var15 + (var17 - var15) * var19 / this.amountPerBranch;
			double var24 = var11 + (var13 - var11) * var19 / this.amountPerBranch;
			double var26 = par2Random.nextDouble() * this.amountPerBranch / 16.0D;
			double var28 = (MathHelper.sin(var19 * (float) Math.PI / this.amountPerBranch) + 1.0F) * var26 + 1.0D;
			double var30 = (MathHelper.sin(var19 * (float) Math.PI / this.amountPerBranch) + 1.0F) * var26 + 1.0D;
			int var32 = MathHelper.floor_double(var20 - var28 / 2.0D);
			int var33 = MathHelper.floor_double(var22 - var30 / 2.0D);
			int var34 = MathHelper.floor_double(var24 - var28 / 2.0D);
			int var35 = MathHelper.floor_double(var20 + var28 / 2.0D);
			int var36 = MathHelper.floor_double(var22 + var30 / 2.0D);
			int var37 = MathHelper.floor_double(var24 + var28 / 2.0D);

			for (int var38 = var32; var38 <= var35; ++var38)
			{
				double var39 = (var38 + 0.5D - var20) / (var28 / 2.0D);

				if (var39 * var39 < 1.0D)
				{
					for (int var41 = var33; var41 <= var36; ++var41)
					{
						double var42 = (var41 + 0.5D - var22) / (var30 / 2.0D);

						if (var39 * var39 + var42 * var42 < 1.0D)
						{
							for (int var44 = var34; var44 <= var37; ++var44)
							{
								double var45 = (var44 + 0.5D - var24) / (var28 / 2.0D);

								int block = par1World.getBlockId(var38, var41, var44);
								if (var39 * var39 + var42 * var42 + var45 * var45 < 1.0D && (this.replaceID == 0 || block == this.replaceID))
								{
									par1World.setBlock(var38, var41, var44, this.oreID, this.oreMeta, 2);
								}
							}
						}
					}
				}
			}
		}

		return true;
	}

	@Override
	public boolean isOreGeneratedInWorld(World world, IChunkProvider chunkGenerator)
	{
		if (!this.shouldGenerate)
		{
			return false;
		}
		if (this.ignoreSurface && chunkGenerator instanceof ChunkProviderGenerate)
		{
			return false;
		}
		if (this.ignoreNether && chunkGenerator instanceof ChunkProviderHell)
		{
			return false;
		}
		if (this.ignoreEnd && chunkGenerator instanceof ChunkProviderEnd)
		{
			return false;
		}
		return true;
	}
}