FightSystem_Core/src/de/steamwar/fightsystem/FightSystem.java

@@ -96,6 +96,7 @@ public class FightSystem extends JavaPlugin {
         new BlockFadeListener();
         new LeaveableArena();
         new ClickAnalyzer();
+        new BlockPlaceCollision();
         new HotbarKit.HotbarKitListener();
         new OneShotStateDependent(ArenaMode.All, FightState.PreSchemSetup, () -> Fight.playSound(SWSound.BLOCK_NOTE_PLING.getSound(), 100.0f, 2.0f));
 

FightSystem_Core/src/de/steamwar/fightsystem/listener/BlockPlaceCollision.java

@@ -0,0 +1,60 @@
+/*
+    This file is a part of the SteamWar software.
+
+    Copyright (C) 2023  SteamWar.de-Serverteam
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.fightsystem.listener;
+
+import de.steamwar.fightsystem.ArenaMode;
+import de.steamwar.fightsystem.states.FightState;
+import de.steamwar.fightsystem.states.StateDependentListener;
+import org.bukkit.Location;
+import org.bukkit.block.Block;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.block.BlockPlaceEvent;
+
+public class BlockPlaceCollision implements Listener {
+
+    public BlockPlaceCollision() {
+        new StateDependentListener(ArenaMode.All, FightState.All, this);
+    }
+
+    @EventHandler
+    public void onBlockPlace(BlockPlaceEvent event) {
+        Block block = event.getBlock();
+        if(!block.getType().isSolid())
+            return;
+
+        // Hitbox size: 0.6xz, 1.8y, 1.5y when sneaking
+        Player player = event.getPlayer();
+        Location min = player.getLocation().add(-0.3, 0, -0.3);
+        Location max = player.getLocation().add(0.3, player.isSneaking() ? 1.5 : 1.8, 0.3);
+
+        Location blockmin = block.getLocation();
+        Location blockmax = block.getLocation().add(1.0, 1.0, 1.0);
+        if(
+                max.getX() <= blockmin.getX() || min.getX() >= blockmax.getX() ||
+                max.getY() <= blockmin.getY() || min.getY() >= blockmax.getY() ||
+                max.getZ() <= blockmin.getZ() || min.getZ() >= blockmax.getZ()
+        )
+            return;
+
+        event.setCancelled(true);
+    }
+}