Completely rework the kart mechanics

Plugins/Mineplex.Game.Nano/src/mineplex/game/nano/NanoManager.java

@@ -36,6 +36,7 @@ import mineplex.core.game.nano.NanoFavourite;
 import mineplex.core.incognito.IncognitoManager;
 import mineplex.core.incognito.events.IncognitoStatusChangeEvent;
 import mineplex.core.newnpc.NewNPCManager;
+import mineplex.core.packethandler.PacketHandler;
 import mineplex.core.serverConfig.ServerConfiguration;
 import mineplex.core.stats.StatsManager;
 import mineplex.core.status.ServerStatusManager;
@@ -113,6 +114,9 @@ public class NanoManager extends MiniPlugin implements IRelation
 	// AntiCheat
 	private final AntiHack _antiHack;
 
+	// Packet
+	private final PacketHandler _packetHandler;
+
 	// NPC
 	private final NewNPCManager _npcManager;
 
@@ -189,6 +193,8 @@ public class NanoManager extends MiniPlugin implements IRelation
 
 		_antiHack = require(AntiHack.class);
 
+		_packetHandler = require(PacketHandler.class);
+
 		_npcManager = require(NewNPCManager.class);
 
 		_damageManager = require(DamageManager.class);
@@ -412,6 +418,11 @@ public class NanoManager extends MiniPlugin implements IRelation
 		return _antiHack;
 	}
 
+	public PacketHandler getPacketHandler()
+	{
+		return _packetHandler;
+	}
+
 	public NewNPCManager getNpcManager()
 	{
 		return _npcManager;

Plugins/Mineplex.Game.Nano/src/mineplex/game/nano/game/games/minekart/Kart.java

@@ -1,11 +1,14 @@
 package mineplex.game.nano.game.games.minekart;
 
+import org.bukkit.Location;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.entity.Sheep;
 import org.bukkit.util.Vector;
 
 import mineplex.core.common.util.UtilEnt;
+import mineplex.core.common.util.UtilTime;
+import mineplex.game.nano.game.games.minekart.KartController.DriftDirection;
 
 public class Kart
 {
@@ -16,23 +19,32 @@ public class Kart
 	private int _lap, _lapCheckpoint, _lapKeyCheckpoint;
 
 	private Vector _velocity;
-	private boolean _crashed;
+	private float _frontWaysInput, _sidewaysInput;
+	private float _yaw;
+	private DriftDirection _driftDirection;
+	private float _driftPower;
+	private long _driftLast;
 
-	Kart(MineKart game, Player driver)
+	private boolean _crashed;
+	private long _crashedAt;
+
+	Kart(Player driver)
 	{
 		_driver = driver;
 
-		_vehicle = driver.getWorld().spawn(driver.getLocation(), Sheep.class);
+		Location location = driver.getLocation();
+		_vehicle = driver.getWorld().spawn(location, Sheep.class);
 
 		UtilEnt.vegetate(_vehicle, true);
 		UtilEnt.ghost(_vehicle, true, false);
 		UtilEnt.setFakeHead(_vehicle, true);
 
+		_vehicle.setPassenger(driver);
+
 		_lap = 1;
 
 		_velocity = new Vector();
-
+		_yaw = location.getYaw();
-		_vehicle.setPassenger(driver);
 	}
 
 	public void remove()
@@ -90,13 +102,82 @@ public class Kart
 		return _velocity;
 	}
 
+	public void setInput(float frontWaysInput, float sidewaysInput)
+	{
+		_frontWaysInput = frontWaysInput;
+		_sidewaysInput = sidewaysInput;
+	}
+
+	public float getFrontWaysInput()
+	{
+		return _frontWaysInput;
+	}
+
+	public float getSidewaysInput()
+	{
+		return _sidewaysInput;
+	}
+
+	public void setYaw(float yaw)
+	{
+		_yaw = yaw;
+	}
+
+	public float getYaw()
+	{
+		return _yaw;
+	}
+
+	public void setDriftDirection(DriftDirection driftDirection)
+	{
+		_driftDirection = driftDirection;
+	}
+
+	public void setDriftPower(float driftPower)
+	{
+		_driftPower = Math.min(0.999F, driftPower);
+	}
+
+	public DriftDirection getDriftDirection()
+	{
+		return _driftDirection;
+	}
+
+	public float getDriftPower()
+	{
+		return _driftPower;
+	}
+
+	public void setDriftLast()
+	{
+		_driftLast = System.currentTimeMillis();
+		_driftPower = 0;
+	}
+
+	public boolean isBoosting()
+	{
+		return !UtilTime.elapsed(_driftLast, 1000);
+	}
+
 	public void setCrashed(boolean crashed)
 	{
 		_crashed = crashed;
+		_driftDirection = null;
+		_driftLast = 0;
+
+		if (crashed)
+		{
+			_crashedAt = System.currentTimeMillis();
+		}
 	}
 
 	public boolean isCrashed()
 	{
 		return _crashed;
 	}
+
+	public long getCrashedAt()
+	{
+		return _crashedAt;
+	}
 }

Plugins/Mineplex.Game.Nano/src/mineplex/game/nano/game/games/minekart/KartController.java

@@ -4,12 +4,24 @@ import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.util.Vector;
 
+import mineplex.core.common.util.UtilAlg;
+
 public class KartController
 {
 
+	public enum DriftDirection
+	{
+		LEFT, RIGHT
+	}
+
 	void applyAirDrag(Kart kart)
 	{
-		Vector velocity = kart.getVelocity().multiply(0.96);
+		if (kart.getFrontWaysInput() != 0)
+		{
+			return;
+		}
+
+		Vector velocity = kart.getVelocity().multiply(0.95);
 
 		if (velocity.length() < 0.05)
 		{
@@ -21,9 +33,11 @@ public class KartController
 	{
 		Location location = kart.getVehicle().getLocation().add(0, 0.5, 0);
 
+		kart.getDriver().sendMessage("y=" + kart.getVehicle().getLocation().getY() % 1);
+
 		if (location.getBlock().getType() != Material.AIR)
 		{
-			kart.getVelocity().multiply(-0.5);
+			kart.getVelocity().multiply(-1);
 			kart.getVelocity().setY(0.5);
 			kart.setCrashed(true);
 		}
@@ -37,21 +51,43 @@ public class KartController
 		}
 
 		Vector velocity = kart.getVelocity();
-		Vector player = kart.getDriver().getLocation().getDirection().setY(0).multiply(0.04);
+		Vector facing = UtilAlg.getTrajectory(kart.getYaw(), 0).multiply(0.03 * kart.getFrontWaysInput());
+		velocity.add(facing);
+	}
 
-		if (velocity.lengthSquared() == 0)
+	void turn(Kart kart)
+	{
+		double velocityLength = kart.getVelocity().length();
+
+		if (velocityLength < 0.1)
 		{
-			velocity = player;
+			return;
-
-			if (velocity.lengthSquared() == 0)
-			{
-				return;
-			}
-
-			kart.setVelocity(velocity);
 		}
 
-		velocity.add(player);
+		float velocityInverse = (float) (2 - velocityLength);
+		float rotation = 3 * kart.getSidewaysInput() * velocityInverse;
+
+		kart.setYaw(kart.getYaw() - rotation);
+	}
+
+	void drift(Kart kart)
+	{
+		if (kart.getDriftDirection() != null && kart.getVelocity().lengthSquared() > 0)
+		{
+			float power = 0.05F * (kart.getDriftDirection() == DriftDirection.LEFT ? kart.getSidewaysInput() : -kart.getSidewaysInput());
+
+			kart.setDriftPower(kart.getDriftPower() + power);
+		}
+		else if (kart.getDriftPower() > 0.2)
+		{
+			Vector facing = UtilAlg.getTrajectory(kart.getYaw(), 0).multiply(kart.getVelocity().length() + (kart.getDriftPower() / 2));
+			kart.setVelocity(facing);
+			kart.setDriftLast();
+		}
+		else
+		{
+			kart.setDriftPower(0);
+		}
 	}
 
 	void applyTopSpeed(Kart kart)
@@ -62,12 +98,15 @@ public class KartController
 		}
 
 		Vector velocity = kart.getVelocity();
+		double length = velocity.length();
+		double max = kart.isBoosting() ? 1.5 : 0.7;
 
-		if (velocity.length() > 1)
+		if (length > max)
 		{
 			kart.setVelocity(velocity.clone()
 					.setY(0)
-					.normalize());
+					.normalize()
+					.multiply(max));
 		}
 	}
 }

Plugins/Mineplex.Game.Nano/src/mineplex/game/nano/game/games/minekart/MineKart.java

@@ -6,17 +6,20 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import net.minecraft.server.v1_8_R3.PacketPlayInSteerVehicle;
+
 import org.bukkit.Location;
-import org.bukkit.Material;
 import org.bukkit.Sound;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
-import org.bukkit.inventory.ItemStack;
 
 import mineplex.core.common.util.UtilAlg;
 import mineplex.core.common.util.UtilEnt;
 import mineplex.core.common.util.UtilMath;
+import mineplex.core.common.util.UtilTime;
+import mineplex.core.packethandler.IPacketHandler;
+import mineplex.core.packethandler.PacketInfo;
 import mineplex.core.updater.UpdateType;
 import mineplex.core.updater.event.UpdateEvent;
 import mineplex.game.nano.NanoManager;
@@ -25,8 +28,9 @@ import mineplex.game.nano.game.SoloGame;
 import mineplex.game.nano.game.event.PlayerGameApplyEvent;
 import mineplex.game.nano.game.event.PlayerGameRespawnEvent;
 import mineplex.game.nano.game.event.PlayerStateChangeEvent;
+import mineplex.game.nano.game.games.minekart.KartController.DriftDirection;
 
-public class MineKart extends SoloGame
+public class MineKart extends SoloGame implements IPacketHandler
 {
 
 	private int _spawnIndex;
@@ -52,6 +56,8 @@ public class MineKart extends SoloGame
 		_teamComponent.setAdjustSpawnYaw(false);
 
 		_damageComponent.setDamage(false);
+
+		manager.getPacketHandler().addPacketHandler(this, PacketPlayInSteerVehicle.class);
 	}
 
 	@Override
@@ -97,6 +103,41 @@ public class MineKart extends SoloGame
 	public void disable()
 	{
 		_checkpoints.clear();
+		_manager.getPacketHandler().removePacketHandler(this);
+	}
+
+	@Override
+	public void handle(PacketInfo packetInfo)
+	{
+		Kart kart = _karts.get(packetInfo.getPlayer());
+
+		if (kart != null)
+		{
+			PacketPlayInSteerVehicle packet = (PacketPlayInSteerVehicle) packetInfo.getPacket();
+
+			// Dismounting
+			if (packet.d())
+			{
+				packetInfo.setCancelled(true);
+				return;
+			}
+
+			// a() - Right-Left, b() - Backwards-Forwards
+			kart.setInput(packet.b(), packet.a());
+
+			// Holding Space
+			if (packet.c())
+			{
+				if (packet.a() != 0 && kart.getDriftDirection() == null)
+				{
+					kart.setDriftDirection(packet.a() > 0 ? DriftDirection.LEFT : DriftDirection.RIGHT);
+				}
+			}
+			else
+			{
+				kart.setDriftDirection(null);
+			}
+		}
 	}
 
 	@EventHandler
@@ -118,11 +159,9 @@ public class MineKart extends SoloGame
 		{
 			_worldComponent.setCreatureAllowOverride(true);
 
-			Kart kart = new Kart(this, player);
+			Kart kart = new Kart(player);
 			_karts.put(player, kart);
 
-			player.getInventory().addItem(new ItemStack(Material.STONE_SWORD));
-
 			_worldComponent.setCreatureAllowOverride(false);
 		}, 1);
 	}
@@ -173,7 +212,7 @@ public class MineKart extends SoloGame
 
 			if (kart.isCrashed())
 			{
-				if (UtilEnt.isGrounded(kart.getVehicle()))
+				if (UtilTime.elapsed(kart.getCrashedAt(), 1000) && UtilEnt.isGrounded(kart.getVehicle()))
 				{
 					kart.setCrashed(false);
 					player.sendMessage("setCrashed(false)");
@@ -190,9 +229,11 @@ public class MineKart extends SoloGame
 			_controller.collideBlock(kart);
 
 			// Accelerate
-			if (canControl && player.isBlocking())
+			if (canControl)
 			{
+				_controller.turn(kart);
 				_controller.accelerate(kart);
+				_controller.drift(kart);
 				_controller.applyTopSpeed(kart);
 			}
 
@@ -201,10 +242,11 @@ public class MineKart extends SoloGame
 			location.add(kart.getVelocity());
 			location.setDirection(kart.getVelocity());
 			UtilEnt.setPosition(vehicle, location);
-			UtilEnt.CreatureLook(vehicle, location.getYaw());
+			UtilEnt.CreatureLook(vehicle, kart.getYaw());
 
 			location.getWorld().playSound(location, Sound.PIG_IDLE, (float) (.1 + velocityLength / 2), (float) (.5 + velocityLength));
-			player.setExp((float) velocityLength);
+			player.setLevel((int) (velocityLength * 100));
+			player.setExp(kart.getDriftPower());
 		});
 	}