EntityPSDLTracker.java

/*******************************************************************************
 * AbyssalCraft
 * Copyright (c) 2012 - 2017 Shinoow.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v3
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl-3.0.txt
 *
 * Contributors:
 *     Shinoow -  implementation
 ******************************************************************************/
package com.shinoow.abyssalcraft.common.entity;

import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.World;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

import com.shinoow.abyssalcraft.api.item.ACItems;
import com.shinoow.abyssalcraft.lib.ACConfig;

public class EntityPSDLTracker extends Entity
{
	/** 'x' location the eye should float towards. */
	private double targetX;
	/** 'y' location the eye should float towards. */
	private double targetY;
	/** 'z' location the eye should float towards. */
	private double targetZ;
	private int despawnTimer;
	private boolean shatterOrDrop;

	public EntityPSDLTracker(World worldIn)
	{
		super(worldIn);
		setSize(0.25F, 0.25F);
	}

	@Override
	protected void entityInit()
	{
	}

	/**
	 * Checks if the entity is in range to render by using the past in distance and comparing it to its average edge
	 * length * 64 * renderDistanceWeight Args: distance
	 */
	@Override
	@SideOnly(Side.CLIENT)
	public boolean isInRangeToRenderDist(double distance)
	{
		double d0 = getEntityBoundingBox().getAverageEdgeLength() * 4.0D;

		if (Double.isNaN(d0))
			d0 = 4.0D;

		d0 = d0 * 64.0D;
		return distance < d0 * d0;
	}

	public EntityPSDLTracker(World worldIn, double x, double y, double z)
	{
		super(worldIn);
		despawnTimer = 0;
		setSize(0.25F, 0.25F);
		setPosition(x, y, z);
	}

	public void moveTowards(BlockPos p_180465_1_)
	{
		double d0 = p_180465_1_.getX();
		int i = p_180465_1_.getY();
		double d1 = p_180465_1_.getZ();
		double d2 = d0 - posX;
		double d3 = d1 - posZ;
		float f = MathHelper.sqrt(d2 * d2 + d3 * d3);

		if (f > 12.0F)
		{
			targetX = posX + d2 / f * 12.0D;
			targetZ = posZ + d3 / f * 12.0D;
			targetY = posY + 8.0D;
		}
		else
		{
			targetX = d0;
			targetY = i;
			targetZ = d1;
		}

		despawnTimer = 0;
		shatterOrDrop = rand.nextInt(5) > 0;
	}

	/**
	 * Sets the velocity to the args. Args: x, y, z
	 */
	@Override
	@SideOnly(Side.CLIENT)
	public void setVelocity(double x, double y, double z)
	{
		motionX = x;
		motionY = y;
		motionZ = z;

		if (prevRotationPitch == 0.0F && prevRotationYaw == 0.0F)
		{
			float f = MathHelper.sqrt(x * x + z * z);
			prevRotationYaw = rotationYaw = (float)(MathHelper.atan2(x, z) * 180.0D / Math.PI);
			prevRotationPitch = rotationPitch = (float)(MathHelper.atan2(y, f) * 180.0D / Math.PI);
		}
	}

	/**
	 * Called to update the entity's position/logic.
	 */
	@Override
	public void onUpdate()
	{
		lastTickPosX = posX;
		lastTickPosY = posY;
		lastTickPosZ = posZ;
		super.onUpdate();
		posX += motionX;
		posY += motionY;
		posZ += motionZ;
		float f = MathHelper.sqrt(motionX * motionX + motionZ * motionZ);
		rotationYaw = (float)(MathHelper.atan2(motionX, motionZ) * 180.0D / Math.PI);

		for (rotationPitch = (float)(MathHelper.atan2(motionY, f) * 180.0D / Math.PI); rotationPitch - prevRotationPitch < -180.0F; prevRotationPitch -= 360.0F)
			;

		while (rotationPitch - prevRotationPitch >= 180.0F)
			prevRotationPitch += 360.0F;

		while (rotationYaw - prevRotationYaw < -180.0F)
			prevRotationYaw -= 360.0F;

		while (rotationYaw - prevRotationYaw >= 180.0F)
			prevRotationYaw += 360.0F;

		rotationPitch = prevRotationPitch + (rotationPitch - prevRotationPitch) * 0.2F;
		rotationYaw = prevRotationYaw + (rotationYaw - prevRotationYaw) * 0.2F;

		if (!world.isRemote)
		{
			double d0 = targetX - posX;
			double d1 = targetZ - posZ;
			float f1 = (float)Math.sqrt(d0 * d0 + d1 * d1);
			float f2 = (float)MathHelper.atan2(d1, d0);
			double d2 = f + (f1 - f) * 0.0025D;

			if (f1 < 1.0F)
			{
				d2 *= 0.8D;
				motionY *= 0.8D;
			}

			motionX = Math.cos(f2) * d2;
			motionZ = Math.sin(f2) * d2;

			if (posY < targetY)
				motionY += (1.0D - motionY) * 0.014999999664723873D;
			else
				motionY += (-1.0D - motionY) * 0.014999999664723873D;
		}

		float f3 = 0.25F;

		if (isInWater())
		{
			for (int i = 0; i < 4; ++i)
				if(ACConfig.particleEntity)
					world.spawnParticle(EnumParticleTypes.WATER_BUBBLE, posX - motionX * f3, posY - motionY * f3, posZ - motionZ * f3, motionX, motionY, motionZ, new int[0]);
		} else if(ACConfig.particleEntity)
			world.spawnParticle(EnumParticleTypes.SMOKE_NORMAL, posX - motionX * f3 + rand.nextDouble() * 0.6D - 0.3D, posY - motionY * f3 - 0.5D, posZ - motionZ * f3 + rand.nextDouble() * 0.6D - 0.3D, motionX, motionY, motionZ, new int[0]);

		if (!world.isRemote)
		{
			setPosition(posX, posY, posZ);
			++despawnTimer;

			if (despawnTimer > 80 && !world.isRemote)
			{
				setDead();

				if (shatterOrDrop)
					world.spawnEntity(new EntityItem(world, posX, posY, posZ, new ItemStack(ACItems.powerstone_tracker)));
				else
					world.playEvent(2003, new BlockPos(this), 0);
			}
		}
	}

	/**
	 * (abstract) Protected helper method to write subclass entity data to NBT.
	 */
	@Override
	public void writeEntityToNBT(NBTTagCompound tagCompound)
	{
	}

	/**
	 * (abstract) Protected helper method to read subclass entity data from NBT.
	 */
	@Override
	public void readEntityFromNBT(NBTTagCompound tagCompund)
	{
	}

	/**
	 * Gets how bright this entity is.
	 */
	@Override
	public float getBrightness(float partialTicks)
	{
		return 1.0F;
	}

	@Override
	@SideOnly(Side.CLIENT)
	public int getBrightnessForRender(float partialTicks)
	{
		return 15728880;
	}

	/**
	 * If returns false, the item will not inflict any damage against entities.
	 */
	@Override
	public boolean canBeAttackedWithItem()
	{
		return false;
	}
}