added basic towerdefense logic

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/towerdefense/EnemyFactory.java

@@ -0,0 +1,18 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense;
+
+import net.minestom.server.entity.EntityCreature;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.attribute.Attribute;
+
+record EnemyFactory(EntityType entityType, float health, double speed) {
+    public EnemyFactory(EntityType entityType) {
+        this(entityType, 20, 0.3);
+    }
+
+    public EntityCreature buildEntity() {
+        EntityCreature entity = new EntityCreature(this.entityType);
+        entity.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(this.speed);
+        entity.setHealth(this.health);
+        return entity;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/towerdefense/GroupFactory.java

@@ -0,0 +1,15 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense;
+
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.timer.TaskSchedule;
+
+record GroupFactory(EnemyFactory enemyFactory, int count, long delay) {
+    public void summonGroup(TowerdefenseRoom instance) {
+        for (int i = 0; i < this.count; i++) {
+            MinecraftServer.getSchedulerManager().scheduleTask(() -> {
+                instance.addEnemy(this.enemyFactory.buildEntity());
+                return TaskSchedule.stop();
+            }, TaskSchedule.millis(this.delay*i));
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/towerdefense/Towerdefense.java

@@ -18,23 +18,26 @@ public class Towerdefense extends StatelessGame {
     private final Random random = new Random();
     private final AbsoluteBlockBatch mazeBatch = new AbsoluteBlockBatch();
     private final List<Pos> mazePath = new ArrayList<>();
-    private List<TowerdefenseRoom> instances = new ArrayList<>();
+    private final List<TowerdefenseRoom> instances = new ArrayList<>();
+
+    private static final int pathLength = 10;
 
     public Towerdefense() {
         super(Dimension.NETHER.key, "Towerdefense", new LastWinsScore());
 
-        setGenerator(new MazeGenerator());
+        this.setGenerator(new MazeGenerator());
         this.generateMaze();
     }
 
     private void generateMaze() {
         Pos position = new Pos(0, 0, 0);
         this.addMazePosition(position, Block.GREEN_WOOL);
+        position = position.add(0,0,2);
 
         List<Integer> previousDirections = new ArrayList<>();
         int direction = 1;      // 0 -> right; 1 -> straight; 2 -> left
-        for (int i = 0; i < 9; i++) {
-            for (int j = 0; j < 3; j++) {
+        for (int i = 0; i < pathLength; i++) {
+            for (int j = 0; j < 9; j++) {
                 position = position.add(direction-1,0,direction%2);
                 this.addMazePosition(position, Block.WHITE_WOOL);
             }
@@ -44,16 +47,20 @@ public class Towerdefense extends StatelessGame {
             long rightLeftDifference = previousDirections.stream().filter(integer -> integer == 0).count() - previousDirections.stream().filter(integer -> integer == 2).count();
             if(rightLeftDifference >= 2 || direction == 2) origin = 1;
             if(rightLeftDifference <= -2 || direction == 0) bound = 2;
-            direction = random.nextInt(origin, bound);
+            direction = this.random.nextInt(origin, bound);
             previousDirections.add(direction);
         }
         this.addMazePosition(position, Block.WHITE_WOOL);
-        this.addMazePosition(position.add(0,0,1), Block.WHITE_WOOL);
-        this.addMazePosition(position.add(0,0,2), Block.RED_WOOL);
+        this.addMazePosition(position.add(0,0,3), Block.WHITE_WOOL);
+        this.addMazePosition(position.add(0,0,6), Block.RED_WOOL);
     }
 
     private void addMazePosition(Pos position, Block pathBlock) {
-        this.mazeBatch.setBlock(position, pathBlock);
+        for (int i = 0; i < 3; i++) {
+            for (int j = 0; j < 3; j++) {
+                this.mazeBatch.setBlock(position.add(i-1,0,j-1), pathBlock);
+            }
+        }
         this.mazePath.add(position.add(0.5,1,0.5));
     }
 
@@ -70,7 +77,10 @@ public class Towerdefense extends StatelessGame {
         TowerdefenseRoom newRoom = new TowerdefenseRoom(p, this);
         this.instances.add(newRoom);
         p.setInstance(newRoom);
-        newRoom.startWave(List.of(EntityType.ENDERMAN, EntityType.BLAZE, EntityType.PLAYER, EntityType.HORSE, EntityType.ARMOR_STAND, EntityType.SKELETON));
+        newRoom.startWave(List.of(
+            new GroupFactory(new EnemyFactory(EntityType.VILLAGER, 20, 0.1), 5, 800),
+            new GroupFactory(new EnemyFactory(EntityType.BEE, 10, 1), 3, 400)
+        ));
         return false;
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/towerdefense/TowerdefenseRoom.java

@@ -2,21 +2,35 @@ package eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense;
 
 import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.generator.MazeGenerator;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.towers.SkeletonTower;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.towers.Tower;
 import eu.mhsl.minenet.minigames.util.BatchUtil;
+import eu.mhsl.minenet.minigames.util.CommonEventHandles;
 import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Pos;
 import net.minestom.server.entity.*;
 import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.event.entity.EntityDeathEvent;
+import net.minestom.server.event.item.ItemDropEvent;
+import net.minestom.server.event.player.PlayerTickEvent;
+import net.minestom.server.event.player.PlayerUseItemEvent;
 import net.minestom.server.instance.InstanceContainer;
+import net.minestom.server.instance.block.Block;
 import net.minestom.server.item.ItemStack;
 import net.minestom.server.item.Material;
-import net.minestom.server.timer.TaskSchedule;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
 
 public class TowerdefenseRoom extends InstanceContainer {
     private final Player player;
     private final Towerdefense game;
+    private final List<EntityCreature> enemies = new ArrayList<>();
+    private final List<Tower> towers = new ArrayList<>();
+    private final Entity cursor;
 
     public TowerdefenseRoom(Player player, Towerdefense game) {
         super(UUID.randomUUID(), Dimension.OVERWORLD.key);
@@ -25,34 +39,75 @@ public class TowerdefenseRoom extends InstanceContainer {
         this.game = game;
         this.player.setGameMode(GameMode.ADVENTURE);
         this.player.setAllowFlying(true);
-        this.player.getInventory().setItemStack(0, ItemStack.of(Material.ARMOR_STAND));
+        this.player.getAttribute(Attribute.BLOCK_INTERACTION_RANGE).setBaseValue(200);
+        this.player.getInventory().setItemStack(0, ItemStack.of(Material.SKELETON_SPAWN_EGG));
 
-        setGenerator(new MazeGenerator());
+        this.setGenerator(new MazeGenerator());
         BatchUtil.loadAndApplyBatch(this.game.getMazeBatch(), this, () -> {});
+
+        this.cursor = new Entity(EntityType.ARMOR_STAND);
+        this.cursor.setInstance(this);
+
+        this.eventNode()
+            .addListener(EntityDeathEvent.class, event -> {
+                if(!(event.getEntity() instanceof EntityCreature enemy)) return;
+                this.enemies.remove(enemy);
+            })
+            .addListener(PlayerTickEvent.class, this::setCursorPosition)
+            .addListener(PlayerUseItemEvent.class, this::setTower)
+            .addListener(ItemDropEvent.class, CommonEventHandles::cancel);
     }
 
-    public void startWave(List<EntityType> entities) {
-        int counter = 0;
-        for(EntityType entityType : entities) {
-            MinecraftServer.getSchedulerManager().scheduleTask(() -> {
-                this.addEntity(new EntityCreature(entityType));
-                return TaskSchedule.stop();
-            }, TaskSchedule.millis(800L*counter));
-            counter++;
+    private void setTower(PlayerUseItemEvent event) {
+        if(event.getItemStack().material().equals(Material.SKELETON_SPAWN_EGG)) {
+            Point newPosition = this.player.getTargetBlockPosition(20);
+            if(newPosition == null) return;
+            if(!this.getBlock(newPosition).equals(Block.BLACK_WOOL)) return;
+            this.setBlock(newPosition, Block.BLUE_WOOL);
+            newPosition = newPosition.add(0.5,1,0.5);
+            SkeletonTower tower = new SkeletonTower();
+            tower.setInstance(this, newPosition);
         }
     }
 
-    private void addEntity(EntityCreature entity) {
-        entity.setInstance(this, this.game.getMazePath().getFirst());
-        entity.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(0.15);
-        entity.getNavigator().setPathTo(this.game.getMazePath().get(1), 0.7, () -> changeEntityGoal(entity, 1));
+    public List<EntityCreature> getEnemies() {
+        return this.enemies;
     }
 
-    private void changeEntityGoal(EntityCreature entity, int positionIndex) {
-        if(positionIndex == this.game.getMazePath().size()-1) {
+    private void setCursorPosition(PlayerTickEvent event) {
+        Point newPosition = this.player.getTargetBlockPosition(20);
+        if(newPosition == null) return;
+        if(this.getBlock(newPosition).equals(Block.BLACK_WOOL)) {
+            this.cursor.setInvisible(false);
+        } else {
+            this.cursor.setInvisible(true);
             return;
         }
-        entity.getNavigator().setPathTo(this.game.getMazePath().get(positionIndex+1), 0.7, () -> changeEntityGoal(entity, positionIndex+1));
+        newPosition = newPosition.add(0.5,1,0.5);
+        this.cursor.teleport(new Pos(newPosition));
     }
 
+    void startWave(List<GroupFactory> enemyGroups) {
+        enemyGroups.forEach(groupFactory -> groupFactory.summonGroup(this));
+    }
+
+    public void addEnemy(EntityCreature enemy) {
+        enemy.setInstance(this, this.game.getMazePath().getFirst());
+        this.enemies.add(enemy);
+        this.changeEnemyGoal(enemy, 0);
+    }
+
+    public Towerdefense getGame() {
+        return this.game;
+    }
+
+    private void changeEnemyGoal(EntityCreature enemy, int positionIndex) {
+        if(positionIndex == this.game.getMazePath().size()-1) {
+            this.enemies.remove(enemy);
+            enemy.remove();
+            this.player.damage(DamageType.PLAYER_ATTACK, enemy.getHealth()/10);
+            return;
+        }
+        enemy.getNavigator().setPathTo(this.game.getMazePath().get(positionIndex+1), 0.6, () -> this.changeEnemyGoal(enemy, positionIndex+1));
+    }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/towerdefense/towers/SkeletonTower.java

@@ -0,0 +1,24 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.towers;
+
+import net.minestom.server.entity.EntityCreature;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+
+public class SkeletonTower extends Tower {
+    public SkeletonTower() {
+        super(EntityType.SKELETON, 1, 300, 20);
+        this.setItemInMainHand(ItemStack.of(Material.BOW));
+    }
+
+    @Override
+    protected void shoot(EntityCreature enemy) {
+        this.shootProjectile(enemy, EntityType.ARROW, 2, 0);
+    }
+
+    @Override
+    protected void onEnemyHit(EntityCreature enemy) {
+        enemy.getAttribute(Attribute.MOVEMENT_SPEED).setBaseValue(enemy.getAttribute(Attribute.MOVEMENT_SPEED).getBaseValue()*0.5);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/towerdefense/towers/Tower.java

@@ -0,0 +1,150 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.towers;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.TowerdefenseRoom;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.collision.Aerodynamics;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.entity.*;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.event.entity.projectile.ProjectileCollideWithBlockEvent;
+import net.minestom.server.event.entity.projectile.ProjectileCollideWithEntityEvent;
+import net.minestom.server.timer.Task;
+import net.minestom.server.timer.TaskSchedule;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.time.Duration;
+import java.util.List;
+import java.util.stream.Stream;
+
+public abstract class Tower extends EntityCreature {
+    public enum Priority {
+        FIRST(Type.PATH_DISTANCE),
+        LAST(Type.PATH_DISTANCE),
+        STRONG(Type.HEALTH),
+        WEAK(Type.HEALTH),
+        CLOSE(Type.TOWER_DISTANCE),
+        FAR(Type.TOWER_DISTANCE);
+
+        final Type type;
+        Priority(Type type) {
+            this.type = type;
+        }
+
+        public Type getType() {
+            return this.type;
+        }
+
+        public enum Type {
+            PATH_DISTANCE,
+            HEALTH,
+            TOWER_DISTANCE
+        }
+    }
+
+    private Priority priority = Priority.FIRST;
+    protected float damage;
+    protected int range;
+    protected TaskSchedule attackDelay;
+    private final Task shootTask;
+
+    public Tower(@NotNull EntityType entityType, float damage, int attackDelay, int range) {
+        super(entityType);
+        this.damage = damage;
+        this.range = range;
+        this.attackDelay = TaskSchedule.millis(attackDelay);
+        this.shootTask = MinecraftServer.getSchedulerManager().scheduleTask(() -> {
+            EntityCreature nextEnemy = this.getNextEnemy();
+            if(nextEnemy == null) return this.attackDelay;
+            this.lookAt(nextEnemy);
+            this.shoot(nextEnemy);
+            return this.attackDelay;
+        }, TaskSchedule.immediate());
+    }
+
+    protected void shootProjectile(EntityCreature enemy, EntityType projectileType, double power, double spread) {
+        EntityProjectile projectile = new EntityProjectile(this, projectileType);
+        projectile.setView(this.getPosition().yaw(), this.getPosition().pitch());
+        projectile.setNoGravity(true);
+        projectile.setAerodynamics(new Aerodynamics(0, 1, 0));
+        Pos startingPoint = this.getPosition().add(0, this.getEyeHeight(), 0);
+
+        double enemySpeed = enemy.getAttribute(Attribute.MOVEMENT_SPEED).getBaseValue() / 0.05;
+        Point enemyGoal = enemy.getNavigator().getGoalPosition();
+        if(enemyGoal == null) enemyGoal = enemy.getPosition();
+        Pos enemyPosition = enemy.getPosition();
+        Vec enemyMovement = Vec.fromPoint(enemyGoal.sub(enemyPosition)).normalize().mul(enemySpeed);
+
+        // just an approximation, not calculated correctly:
+        double projectileSpeed = 20 * power;
+        double enemyTowerDistance = startingPoint.distance(enemyPosition);
+        double estimatedFlightTime = (enemyTowerDistance / projectileSpeed);
+        Pos targetPosition = enemyPosition.add(enemyMovement.mul(estimatedFlightTime)).withY(enemyPosition.y()+enemy.getEyeHeight());
+
+        projectile.shoot(targetPosition, power, spread);
+        projectile.scheduleRemove(Duration.ofSeconds(5));
+        projectile.setInstance(this.getInstance(), startingPoint);
+        projectile.eventNode()
+            .addListener(ProjectileCollideWithEntityEvent.class, event -> {
+                if(!(event.getTarget() instanceof EntityCreature target)) return;
+                if(!this.getRoomInstance().getEnemies().contains(target)) return;
+                target.damage(DamageType.PLAYER_ATTACK, this.damage);
+                this.onEnemyHit(target);
+                projectile.remove();
+            })
+            .addListener(ProjectileCollideWithBlockEvent.class, event -> projectile.remove());
+    }
+
+    protected void onEnemyHit(EntityCreature enemy) {
+
+    }
+
+    protected TowerdefenseRoom getRoomInstance() {
+        return (TowerdefenseRoom) this.getInstance();
+    }
+
+    private @Nullable EntityCreature getNextEnemy() {
+        List<EntityCreature> enemies = this.getSortedEnemies();
+        if(enemies.isEmpty()) return null;
+
+        return switch (this.priority) {
+            case LAST, STRONG, FAR -> enemies.getLast();
+            case FIRST, WEAK, CLOSE -> enemies.getFirst();
+        };
+    }
+
+    private List<EntityCreature> getSortedEnemies() {
+        Stream<EntityCreature> enemyStream = this.getRoomInstance().getEnemies().stream().parallel()
+            .filter(enemy -> !enemy.isDead())
+            .filter(enemy -> enemy.getPosition().distance(this.getPosition()) <= this.range);
+        return switch (this.priority.getType()) {
+            case PATH_DISTANCE -> enemyStream
+                .sorted((o1, o2) -> {
+                    Pos endPoint = this.getRoomInstance().getGame().getMazePath().getLast();
+                    return Double.compare(
+                        o1.getPosition().distance(endPoint),
+                        o2.getPosition().distance(endPoint)
+                    );
+                }).toList();
+            case TOWER_DISTANCE -> enemyStream
+                .sorted((o1, o2) -> Double.compare(
+                    o1.getPosition().distance(this.getPosition()),
+                    o2.getPosition().distance(this.getPosition())
+                )).toList();
+            case HEALTH -> enemyStream
+                .sorted((o1, o2) -> Float.compare(o1.getHealth(), o2.getHealth()))
+                .toList();
+        };
+    }
+
+    @Override
+    protected void remove(boolean permanent) {
+        this.shootTask.cancel();
+        super.remove(permanent);
+    }
+
+    protected abstract void shoot(EntityCreature enemy);
+}