aether-legacy/src/main/java/com/legacy/aether/entities/passive/mountable/EntityParachute.java

package com.legacy.aether.entities.passive.mountable;

import io.netty.buffer.ByteBuf;

import java.util.List;

import cpw.mods.fml.common.registry.IEntityAdditionalSpawnData;
import net.minecraft.block.material.Material;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.world.World;

public class EntityParachute extends Entity implements IEntityAdditionalSpawnData {

    private EntityPlayer ridingPlayer;

    public boolean isGoldenParachute;

    public EntityParachute(World world) {
        super(world);

        this.setSize(1.0F, 1.0F);
    }

    public EntityParachute(World world, EntityPlayer player, boolean isGolden) {
        this(world);

        this.prevPosX = this.posX;
        this.prevPosY = this.posY;
        this.prevPosZ = this.posZ;
        this.ridingPlayer = player;
        this.isGoldenParachute = isGolden;

        this.moveToEntityUsing();
        this.spawnExplosionParticle();
    }

    @Override
    protected void entityInit() {

    }

    public void spawnExplosionParticle() {
        if (this.worldObj.isRemote) {
            double d0 = this.rand.nextGaussian() * 0.02D;
            double d1 = this.rand.nextGaussian() * 0.02D;
            double d2 = this.rand.nextGaussian() * 0.02D;
            double d3 = 10.0D;
            this.worldObj.spawnParticle("explode", this.posX + (double) (this.rand.nextFloat() * this.width * 2.0F) - (double) this.width - d0 * d3, this.posY - 0.5D + (double) (this.rand.nextFloat() * this.height) - d1 * d3, this.posZ + (double) (this.rand.nextFloat() * this.width * 2.0F) - (double) this.width - d2 * d3, d0, d1, d2);
        } else {
            this.worldObj.setEntityState(this, (byte) 20);
        }
    }

    @Override
    public void onUpdate() {
        if (this.isDead || this.ridingPlayer == null) {
            this.setDead();

            return;
        }

        if (this.ridingPlayer != null) {
            if (this.ridingPlayer.motionY < -0.25F) {
                this.ridingPlayer.motionY = -0.25F;
            }

            this.ridingPlayer.fallDistance = 0F;

            this.moveToEntityUsing();
            this.spawnExplosionParticle();
        }
    }

    private void moveToEntityUsing() {
        this.setPositionAndRotation(this.ridingPlayer.posX, this.ridingPlayer.boundingBox.minY - (this.height / 2) - 0.5D, this.ridingPlayer.posZ, this.ridingPlayer.rotationYaw, this.ridingPlayer.rotationPitch);

        this.motionX = this.ridingPlayer.motionX;
        this.motionY = this.ridingPlayer.motionY;
        this.motionZ = this.ridingPlayer.motionZ;
        this.rotationYaw = this.ridingPlayer.rotationYaw;

        if (this.isCollided()) {
            this.die();
        }
    }

    private boolean isCollided() {
        List<?> list = this.worldObj.getCollidingBoundingBoxes(this, this.boundingBox);

        for (int size = 0; size < list.size(); ) {
            if (size == 0 && list.size() == 0) {
                return false;
            }

            AxisAlignedBB collision_list = (AxisAlignedBB) list.get(size);

            return collision_list != this.ridingPlayer.boundingBox;
        }

        return this.worldObj.isAABBInMaterial(this.boundingBox, Material.water);
    }

    @Override
    public void onCollideWithPlayer(EntityPlayer entityplayer) {

    }

    public void die() {
        if (this.ridingPlayer != null) {
            this.spawnExplosionParticle();
        }

        this.ridingPlayer = null;
        this.isDead = true;
    }

    public static boolean entityHasRoomForCloud(World world, EntityPlayer player) {
        AxisAlignedBB boundingBox = player.boundingBox;

        return world.getCollidingBoundingBoxes(player, boundingBox).size() == 0 && !world.isAABBInMaterial(boundingBox, Material.water);
    }

    @Override
    public boolean isInRangeToRenderDist(double d) {
        if (this.ridingPlayer != null) {
            return this.ridingPlayer.isInRangeToRenderDist(d);
        }

        return super.isInRangeToRenderDist(d);
    }

    @Override
    public boolean canBeCollidedWith() {
        return true;
    }

    @Override
    protected void readEntityFromNBT(NBTTagCompound compound) {

    }

    @Override
    protected void writeEntityToNBT(NBTTagCompound compound) {

    }

    @Override
    public void writeSpawnData(ByteBuf buffer) {
        buffer.writeBoolean(this.isGoldenParachute);
        buffer.writeInt(this.ridingPlayer == null ? 0 : this.ridingPlayer.getEntityId());
    }

    @Override
    public void readSpawnData(ByteBuf buffer) {
        this.isGoldenParachute = buffer.readBoolean();
        this.ridingPlayer = buffer.readInt() == 0 ? null : (EntityPlayer) this.worldObj.getEntityByID(buffer.readInt());
    }

}