BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/SimulatorTestCommand.java

@@ -60,4 +60,14 @@ public class SimulatorTestCommand extends SWCommand {
     public void runCommand(Player player) {
         SimulatorExecutor.run(SIMULATOR);
     }
+
+    @Register("show")
+    public void showCommand(Player player) {
+        SimulatorWatcher.show(SIMULATOR, player);
+    }
+
+    @Register("hide")
+    public void hideCommand(Player player) {
+        SimulatorWatcher.hide(SIMULATOR, player);
+    }
 }

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/SimulatorWatcher.java

@@ -20,21 +20,32 @@
 package de.steamwar.bausystem.features.simulator2;
 
 import de.steamwar.bausystem.features.simulator2.data.Simulator;
+import de.steamwar.bausystem.features.simulator2.data.SimulatorElement;
+import de.steamwar.bausystem.features.simulator2.data.SimulatorGroup;
+import de.steamwar.bausystem.features.simulator2.data.tnt.TNTElement;
 import de.steamwar.bausystem.shared.Pair;
+import de.steamwar.entity.REntity;
+import de.steamwar.entity.REntityServer;
+import de.steamwar.entity.RFallingBlockEntity;
 import de.steamwar.linkage.Linked;
 import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.util.Vector;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 
 @UtilityClass
 public class SimulatorWatcher {
 
+    private final World WORLD = Bukkit.getWorlds().get(0);
+    private Map<Simulator, REntityServer> entityServers = new HashMap<>();
     private Map<Player, Pair<Simulator, Runnable>> watchers = new HashMap<>();
 
     public void watch(Player player, Simulator simulator, Runnable watcher) {
@@ -46,6 +57,10 @@ public class SimulatorWatcher {
     }
 
     public void update(Simulator simulator) {
+        REntityServer rEntityServer = entityServers.get(simulator);
+        rEntityServer.getEntities().forEach(REntity::die);
+        createSim(rEntityServer, simulator);
+
         new ArrayList<>(watchers.values()).forEach(simulatorRunnablePair -> {
             if (simulatorRunnablePair.getKey() == simulator) {
                 simulatorRunnablePair.getValue().run();
@@ -59,6 +74,39 @@ public class SimulatorWatcher {
         @EventHandler
         public void onPlayerQuit(PlayerQuitEvent event) {
             watchers.remove(event.getPlayer());
+            hide(event.getPlayer());
         }
     }
+
+    private REntityServer createSim(REntityServer server, Simulator simulator) {
+        Map<Vector, Set<Class<?>>> positionCache = new HashMap<>();
+        simulator.getElements().stream().map(SimulatorGroup::getElements).flatMap(List::stream).forEach(simulatorElement -> {
+            boolean wasNotPresent = positionCache.computeIfAbsent(simulatorElement.getPosition(), __ -> new HashSet<>())
+                    .add(simulatorElement.getClass());
+            if (!wasNotPresent) return;
+            Material material = simulatorElement.getWorldMaterial();
+            Location location = simulatorElement.getWorldPos().toLocation(WORLD);
+            RFallingBlockEntity rFallingBlockEntity = new RFallingBlockEntity(server, location, material);
+            rFallingBlockEntity.setNoGravity(true);
+        });
+        return server;
+    }
+
+    public void show(Simulator sim, Player player) {
+        entityServers.computeIfAbsent(sim, __ -> createSim(new REntityServer(), sim)).addPlayer(player);
+    }
+
+    public void hide(Player player) {
+        entityServers.replaceAll((simulator, rEntityServer) -> {
+            rEntityServer.removePlayer(player);
+            return rEntityServer.getPlayers().isEmpty() ? null : rEntityServer;
+        });
+    }
+
+    public void hide(Simulator sim, Player player) {
+        entityServers.computeIfPresent(sim, (simulator, rEntityServer) -> {
+            rEntityServer.removePlayer(player);
+            return rEntityServer.getPlayers().isEmpty() ? null : rEntityServer;
+        });
+    }
 }

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/data/SimulatorElement.java

@@ -76,6 +76,12 @@ public abstract class SimulatorElement<T extends SimulatorPhase> {
         position.setZ(position.getZ() + z);
     }
 
+    public abstract Material getWorldMaterial();
+
+    public Vector getWorldPos() {
+        return position;
+    }
+
     public SWItem toItem(Player player, InvCallback invCallback) {
         List<String> lore = new ArrayList<>();
         lore.add("§7Phase count§8:§e " + phases.size());

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/data/redstone/RedstoneElement.java

@@ -33,4 +33,14 @@ public class RedstoneElement extends SimulatorElement<RedstonePhase> {
     public String getName() {
         return "Redstone";
     }
+
+    @Override
+    public Material getWorldMaterial() {
+        return Material.REDSTONE_BLOCK;
+    }
+
+    @Override
+    public Vector getWorldPos() {
+        return position.clone().add(new Vector(0.5, 0, 0.5));
+    }
 }

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/data/tnt/TNTElement.java

@@ -20,7 +20,10 @@
 package de.steamwar.bausystem.features.simulator2.data.tnt;
 
 import de.steamwar.bausystem.features.simulator2.data.SimulatorElement;
+import de.steamwar.inventory.InvCallback;
+import de.steamwar.inventory.SWItem;
 import org.bukkit.Material;
+import org.bukkit.entity.Player;
 import org.bukkit.util.Vector;
 
 public class TNTElement extends SimulatorElement<TNTPhase> {
@@ -61,4 +64,17 @@ public class TNTElement extends SimulatorElement<TNTPhase> {
             position.setZ(position.getBlockZ() + offset.getZ());
         }
     }
+
+    @Override
+    public SWItem toItem(Player player, InvCallback invCallback) {
+        long sum = phases.stream().mapToInt(TNTPhase::getCount).sum();
+        SWItem swItem = super.toItem(player, invCallback);
+        swItem.getItemStack().setAmount((int) Math.min(64, Math.max(1, sum)));
+        return swItem;
+    }
+
+    @Override
+    public Material getWorldMaterial() {
+        return Material.TNT;
+    }
 }

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/gui/SimulatorGroupGui.java

@@ -50,6 +50,7 @@ public class SimulatorGroupGui extends SimulatorPageGui<SimulatorElement<?>> {
 
     @Override
     public void headerAndFooter() {
+        simulatorGroup.getElements().removeIf(element -> element.getPhases().isEmpty());
         if (simulatorGroup.getElements().size() < 2) {
             back.open();
             return;
@@ -63,7 +64,8 @@ public class SimulatorGroupGui extends SimulatorPageGui<SimulatorElement<?>> {
 
         inventory.setItem(4, simulatorGroup.toItem(player, clickType -> {
             new SimulatorMaterialGui(player, simulator, simulatorGroup::getMaterial, simulatorGroup::setMaterial, this).open();
-        }, clickType -> {}));
+        }, clickType -> {
+        }));
 
         inventory.setItem(48, new SWItem(Material.REPEATER, "§eSettings", clickType -> {
             new SimulatorGroupSettingsGui(player, simulator, simulatorGroup, this).open();

BauSystem_Main/src/de/steamwar/bausystem/features/simulator2/gui/SimulatorGui.java

@@ -43,7 +43,7 @@ public class SimulatorGui extends SimulatorPageGui<SimulatorGroup> {
 
     @Override
     public void headerAndFooter() {
-        simulator.getElements().removeIf(element -> element.getElements().isEmpty());
+        simulator.getElements().removeIf(element -> element.getElements().isEmpty() || element.getElements().stream().allMatch(simulatorElement -> simulatorElement.getPhases().isEmpty()));
 
         inventory.setItem(4, simulator.toItem(player, clickType -> {
             new SimulatorMaterialGui(player, simulator, simulator::getMaterial, simulator::setMaterial, this).open();
@@ -60,7 +60,7 @@ public class SimulatorGui extends SimulatorPageGui<SimulatorGroup> {
         }, clickType -> {
             SimulatorElement<?> element = simulatorGroup.getElements().get(0);
             if (element instanceof TNTElement) {
-                new SimulatorTNTGui(player, simulator, (TNTElement) element, simulatorGroup,this).open();
+                new SimulatorTNTGui(player, simulator, (TNTElement) element, simulatorGroup, this).open();
             } else if (element instanceof RedstoneElement) {
                 new SimulatorRedstoneGui(player, simulator, simulatorGroup, (RedstoneElement) element, this).open();
             }