EventTintedTreeGenerator.java

package com.yolp900.itsjustacharm.common.events;

import com.yolp900.itsjustacharm.common.world.TintedTreeGenerator;
import net.minecraft.init.Biomes;
import net.minecraft.world.World;
import net.minecraft.world.biome.Biome;
import net.minecraftforge.event.terraingen.DecorateBiomeEvent;
import net.minecraftforge.fml.common.eventhandler.Event;
import net.minecraftforge.fml.common.eventhandler.EventPriority;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

import java.util.Random;

public class EventTintedTreeGenerator {

	@SubscribeEvent(priority = EventPriority.LOWEST)
	public void decorate(DecorateBiomeEvent.Decorate event) {
		World world = event.getWorld();
		Biome biome = world.getBiomeGenForCoords(event.getPos());
		Random rand = event.getRand();

		if ((biome == Biomes.PLAINS || biome == Biomes.ICE_PLAINS || biome == Biomes.MUTATED_PLAINS || biome == Biomes.EXTREME_HILLS_WITH_TREES || biome == Biomes.MUTATED_EXTREME_HILLS_WITH_TREES) && event.getType() == DecorateBiomeEvent.Decorate.EventType.TREE) {
			if (rand.nextDouble() > 0.1) return;
			int x = rand.nextInt(16) + 8;
			int y = rand.nextInt(16) + 8;

			TintedTreeGenerator gen = new TintedTreeGenerator();

			gen.generateTree(rand, world, world.getHeight(event.getPos().add(x, 0, y)));

			event.setResult(Event.Result.DENY);
		}
	}

}