TallGrassWorldGenerator

package com.mojang.minecraft.world.gen.impl;

import java.util.Random;

/**
 * A world generator which generates tall grass.
 * @author Ryan Greene
 *
 */
public class TallGrassWorldGenerator extends WorldGenerator {

    /**
     * The id of the grass block which is being generated.
     */
    private final int grassBlockId;

    /**
     * The metadata of the grass block which is being generated.
     */
    private final int grassMetadata;

    /**
     * Constructs a new tall grass world generator with the specified grass id and metadata.
     * @param grassBlockId The id of the grass block which is being generated
     * @param grassMetadata The metadata of the grass block which is being generated
     */
    public TallGrassWorldGenerator(final int grassBlockId, final int grassMetadata) {
        this.grassBlockId = grassBlockId;
        this.grassMetadata = grassMetadata;
    }

    @Override
    public boolean generate(final World world, final Random random, final int x, int y, final int z) {
        for (int attempt = 0; attempt < 128; attempt++) {
            final int grassX = x + random.nextInt(8) - random.nextInt(8);
            final int grassY = y + random.nextInt(4) - random.nextInt(4);
            final int grassZ = z + random.nextInt(8) - random.nextInt(8);
            if (world.isAirBlock(grassX, grassY, grassZ) && ((BlockFlower) Block.blocksList[grassBlockId]).canBlockStay(world, grassX, grassY, grassZ)) {
                world.setBlockAndMetadata(grassX, grassY, grassZ, grassBlockId, grassMetadata);
            }
        }

        return true;
    }
}