TileLaser

package practicalities.blocks;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.function.Consumer;

import net.minecraft.block.Block;
import net.minecraft.block.state.IBlockState;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.network.NetworkManager;
import net.minecraft.network.Packet;
import net.minecraft.network.play.server.S35PacketUpdateTileEntity;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.ITickable;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.network.NetworkRegistry.TargetPoint;
import net.minecraftforge.fml.common.registry.GameRegistry;
import practicalities.Logger;
import practicalities.lib.util.WorldTraceUtil;
import practicalities.lib.util.vec.Vector3;
import practicalities.network.NetHandler;
import practicalities.network.message.MessageSyncLasers;

public class TileLaser extends TileEntity implements ITickable {

    int hitCounter = 0;

    public EnumFacing facing = EnumFacing.UP, attached = EnumFacing.DOWN;

    List<Laser> oldLasers = new ArrayList<>();
    Laser currentLaser = null;

    public boolean powered = false;

    public static class Laser {
        public double start, end, lastStart, lastEnd;

        public BlockPos moveEnd(World w, Vector3 origin, double speed, EnumFacing direction) {
            Vector3 endVec = origin.copy().add(new Vector3(direction, this.end));
            double amountToMove = WorldTraceUtil.rayHitDistance(w, endVec, speed, direction);
            end += amountToMove;
            if(amountToMove != speed) {
                endVec = origin.copy().add(new Vector3(direction, this.end)).floor();

                return new BlockPos(endVec.vec3());
            }
            return null;
        }

        public NBTTagCompound tag() {
            NBTTagCompound tag = new NBTTagCompound();
            tag.setDouble(START_TAG, start);
            tag.setDouble(END_TAG,   end);
            return tag;
        }

        public static Laser fromTag(NBTTagCompound tag) {
            Laser laser = new Laser();
            laser.start = tag.getDouble(START_TAG);
            laser.end   = tag.getDouble(END_TAG);
            return laser;
        }

        public static final String START_TAG = "s", END_TAG = "e";
    }

    public void eachLaser(Consumer<Laser> r) {
        if(currentLaser != null) r.accept(currentLaser);
        oldLasers.forEach(r);
    }

    AxisAlignedBB renderBox = AxisAlignedBB.fromBounds(
            -RANGE, -RANGE, -RANGE,
             RANGE,  RANGE,  RANGE);

    @Override
    public AxisAlignedBB getRenderBoundingBox() {
        return renderBox.offset(pos.getX(), pos.getY(), pos.getZ());//new AxisAlignedBB(pos, pos.add(1, 1, 1)).expand(RANGE, RANGE, RANGE);
    }

    @Override
    public double getMaxRenderDistanceSquared() {
        return (RANGE*3)*(RANGE*3);
    }

}