src/main/java/com/legacy/aether/entities/movement/AetherPoisonMovement.java

package com.legacy.aether.entities.movement;

import net.minecraft.entity.EntityLivingBase;
import net.minecraft.util.DamageSource;

public class AetherPoisonMovement {

	public int ticks = 0;

	public double rotD, motD;

	private EntityLivingBase entity;

	public AetherPoisonMovement(EntityLivingBase entity) {
		this.entity = entity;
	}

	public void onUpdate() {
		int timeUntilHit = this.ticks % 50;

		if (this.entity.isDead) {
			this.ticks = 0;
		} else if (this.ticks < 0) {
			this.ticks++;
		} else if (this.ticks > 0) {
			this.ticks--;

			if (timeUntilHit == 0) {
				this.entity.attackEntityFrom(causePoisonDamage(), 1.0F);
			}

			this.distractEntity();
		}
	}

	public void inflictPoison(int ticks) {
		if (this.ticks >= 0) {
			this.ticks = ticks;
		}
	}

	public void inflictCure(int ticks) {
		this.ticks = -ticks;
	}

	public void distractEntity() {
		double gaussian = this.entity.worldObj.rand.nextGaussian();
		double newMotD = 0.1D * gaussian;
		double newRotD = (Math.PI / 4D) * gaussian;

		this.motD = 0.2D * newMotD + (0.8D) * this.motD;
		this.entity.motionX += this.motD;
		this.entity.motionZ += this.motD;
		this.rotD = 0.125D * newRotD + (1.0D - 0.125D) * this.rotD;

		this.entity.rotationYaw = (float) ((double) this.entity.rotationYaw + rotD);
		this.entity.rotationPitch = (float) ((double) this.entity.rotationPitch + rotD);
	}

	public static DamageSource causePoisonDamage() {
		return new DamageSource("aether_legacy.poison").setDamageBypassesArmor();
	}

}