World transision WIP

art/mockups/3d/best_house_blender.blend.import

@@ -4,11 +4,12 @@ importer="scene"
 importer_version=1
 type="PackedScene"
 uid="uid://b3kyrsoobmkhp"
-valid=false
+path="res://.godot/imported/best_house_blender.blend-ac89c74aef2f275bdf4b4baadee17c0c.scn"
 
 [deps]
 
 source_file="res://art/mockups/3d/best_house_blender.blend"
+dest_files=["res://.godot/imported/best_house_blender.blend-ac89c74aef2f275bdf4b4baadee17c0c.scn"]
 
 [params]
 

prefabs/Player3D.tscn

@@ -1,7 +1,7 @@
 [gd_scene load_steps=303 format=3 uid="uid://dbd1niu3tp8y5"]
 
 [ext_resource type="Script" uid="uid://b4ugrget2x6lb" path="res://scripts/CSharp/Common/CharacterControls/Player3D.cs" id="1_3trg2"]
-[ext_resource type="Script" uid="uid://bblprbhnbyv77" path="res://scripts/CSharp/Common/CharacterControls/VesnaBehaviour.cs" id="1_pkl5l"]
+[ext_resource type="Script" uid="uid://xm0um640aes7" path="res://scripts/CSharp/Common/CharacterControls/VesnaBehaviour.cs" id="1_pkl5l"]
 [ext_resource type="Texture2D" uid="uid://duaideiajsu8r" path="res://art/characters/Vesna/babushka concept art vesna.png" id="2_3trg2"]
 [ext_resource type="PackedScene" uid="uid://biwd3jj65qrlh" path="res://prefabs/farming/base_field.tscn" id="2_oq5hi"]
 [ext_resource type="Texture2D" uid="uid://c4ggew55w0icj" path="res://art/farm/farming/farmobjekte/harke.png" id="4_kngqo"]
@@ -1344,5 +1344,3 @@ _wateringCanSprite = NodePath("../CharacterBody3D/Farming/Watering can")
 _fieldPrefab = ExtResource("2_oq5hi")
 _movingPlayer = NodePath("../CharacterBody3D")
 metadata/_custom_type_script = "uid://b1sscdr4ptec8"
-
-[connection signal="WaterField" from="FarmingControls" to="." method="UseWateringCan"]

prefabs/UI/Inventory/Slot.tscn

@@ -41,4 +41,22 @@ label_settings = SubResource("LabelSettings_7emux")
 horizontal_alignment = 1
 vertical_alignment = 1
 
+[node name="AmountLabel" type="Label" parent="."]
+layout_mode = 1
+anchors_preset = -1
+anchor_left = 1.0
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = -409.0
+offset_top = -329.0
+offset_right = -10.0
+offset_bottom = -10.0
+grow_horizontal = 0
+grow_vertical = 0
+theme_override_colors/font_color = Color(0, 0, 0, 1)
+text = "999"
+horizontal_alignment = 2
+vertical_alignment = 2
+
 [connection signal="gui_input" from="." to="." method="_on_gui_input"]

prefabs/world_elements/world_change_trigger.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3 uid="uid://bs3vs05wp5a20"]
+
+[ext_resource type="Script" uid="uid://cpbv0b3ahorep" path="res://scripts/CSharp/Common/WorldManagement/WorldChangeTrigger.cs" id="1_wqqyh"]
+
+[node name="WorldChangeTrigger" type="Area3D"]
+script = ExtResource("1_wqqyh")

project.godot

@@ -11,7 +11,7 @@ config_version=5
 [application]
 
 config/name="Babushka"
-run/main_scene="uid://dbxy2y85r1d8x"
+run/main_scene="uid://dbgkbil1ultks"
 config/features=PackedStringArray("4.4", "C#", "Forward Plus")
 config/icon="res://icon.svg"
 
@@ -66,10 +66,6 @@ translation/id_counter=22
 translation/locales=["de", "en"]
 text/autopauses={}
 
-[display]
-
-window/size/always_on_top=true
-
 [dotnet]
 
 project/assembly_name="Babushka"

resources/items/axe.tres

@@ -6,4 +6,5 @@
 script = ExtResource("1_t485b")
 name = "Axe Deo"
 color = Color(0.643898, 0.4587, 0.294335, 1)
+maxStack = 1
 metadata/_custom_type_script = "uid://cbskymrxs6ksu"

resources/items/bucket.tres

@@ -6,4 +6,5 @@
 script = ExtResource("1_8k5aa")
 name = "Buck the Bucket"
 color = Color(0.336269, 0.489145, 0.825324, 1)
+maxStack = 1
 metadata/_custom_type_script = "uid://cbskymrxs6ksu"

resources/items/hoe.tres

@@ -6,4 +6,5 @@
 script = ExtResource("1_06nef")
 name = "Your Mom"
 color = Color(0.751421, 0.329615, 0.570911, 1)
+maxStack = 1
 metadata/_custom_type_script = "uid://cbskymrxs6ksu"

resources/items/pickaxe.tres

@@ -6,4 +6,5 @@
 script = ExtResource("1_07aya")
 name = "Pick Axe"
 color = Color(0.589014, 0.823353, 0.998475, 1)
+maxStack = 1
 metadata/_custom_type_script = "uid://cbskymrxs6ksu"

resources/items/tomato_seed.tres

@@ -0,0 +1,10 @@
+[gd_resource type="Resource" script_class="ItemResource" load_steps=2 format=3 uid="uid://d1uuxp1lp4aro"]
+
+[ext_resource type="Script" uid="uid://cbskymrxs6ksu" path="res://scripts/CSharp/Common/Inventory/ItemResource.cs" id="1_dustj"]
+
+[resource]
+script = ExtResource("1_dustj")
+name = "Tomato Seed"
+color = Color(0.135039, 0.307214, 0.333128, 1)
+maxStack = 20
+metadata/_custom_type_script = "uid://cbskymrxs6ksu"

resources/spawnpoints/from_test_scene.tres

@@ -0,0 +1,8 @@
+[gd_resource type="Resource" script_class="SpawnPointResource" load_steps=2 format=3 uid="uid://cipetn2hmnew4"]
+
+[ext_resource type="Script" uid="uid://cjr2efpm660kr" path="res://scripts/CSharp/Common/WorldManagement/SpawnPointResource.cs" id="1_ymkjy"]
+
+[resource]
+script = ExtResource("1_ymkjy")
+name = ""
+metadata/_custom_type_script = "uid://cjr2efpm660kr"

resources/spawnpoints/spawnpoint_game_start.tres

@@ -0,0 +1,8 @@
+[gd_resource type="Resource" script_class="SpawnPointResource" load_steps=2 format=3 uid="uid://daow8nx85vuc8"]
+
+[ext_resource type="Script" uid="uid://cjr2efpm660kr" path="res://scripts/CSharp/Common/WorldManagement/SpawnPointResource.cs" id="1_kdbco"]
+
+[resource]
+script = ExtResource("1_kdbco")
+name = "GameStart"
+metadata/_custom_type_script = "uid://cjr2efpm660kr"

resources/spawnpoints/tmp1.tres

@@ -0,0 +1,8 @@
+[gd_resource type="Resource" script_class="SpawnPointResource" load_steps=2 format=3 uid="uid://dissbtj4nflu5"]
+
+[ext_resource type="Script" uid="uid://cjr2efpm660kr" path="res://scripts/CSharp/Common/WorldManagement/SpawnPointResource.cs" id="1_vyl4c"]
+
+[resource]
+script = ExtResource("1_vyl4c")
+name = "tmp1"
+metadata/_custom_type_script = "uid://cjr2efpm660kr"

scenes/babushka_scene_main.tscn

@@ -0,0 +1,21 @@
+[gd_scene load_steps=6 format=3 uid="uid://dbgkbil1ultks"]
+
+[ext_resource type="Script" uid="uid://g338f4yomfo3" path="res://scripts/CSharp/Common/WorldManagement/WorldContainer.cs" id="1_l112d"]
+[ext_resource type="PackedScene" uid="uid://dbxy2y85r1d8x" path="res://scenes/worlds/Babushka_world_item_pickup_testing.tscn" id="2_akoq3"]
+[ext_resource type="PackedScene" uid="uid://dbd1niu3tp8y5" path="res://prefabs/Player3D.tscn" id="2_l45op"]
+[ext_resource type="Resource" uid="uid://daow8nx85vuc8" path="res://resources/spawnpoints/spawnpoint_game_start.tres" id="3_4ix36"]
+[ext_resource type="PackedScene" uid="uid://cgjc4wurbgimy" path="res://prefabs/UI/Inventory/Inventory.tscn" id="3_akoq3"]
+
+[node name="BabushkaSceneMain" type="Node"]
+
+[node name="WorldContainer" type="Node" parent="."]
+script = ExtResource("1_l112d")
+startingWorld = ExtResource("2_akoq3")
+startingSpawnPoint = ExtResource("3_4ix36")
+
+[node name="Player3d" parent="." instance=ExtResource("2_l45op")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -5.51633, 0.725631, 3.57249)
+
+[node name="Inventory" parent="." instance=ExtResource("3_akoq3")]
+
+[connection signal="WorldChanged" from="WorldContainer" to="Player3d" method="TeleportTo"]

scenes/worlds/Babushka_world_item_pickup_testing.tscn

@@ -1,13 +1,17 @@
-[gd_scene load_steps=12 format=3 uid="uid://dbxy2y85r1d8x"]
+[gd_scene load_steps=17 format=3 uid="uid://dbxy2y85r1d8x"]
 
-[ext_resource type="PackedScene" uid="uid://dbd1niu3tp8y5" path="res://prefabs/Player3D.tscn" id="1_pdc5e"]
+[ext_resource type="Script" uid="uid://6aq8mr0sofrs" path="res://scripts/CSharp/Common/WorldManagement/World.cs" id="1_jnel3"]
 [ext_resource type="PackedScene" uid="uid://biwd3jj65qrlh" path="res://prefabs/farming/base_field.tscn" id="2_741gk"]
 [ext_resource type="PackedScene" uid="uid://5hltxpdxmqcq" path="res://prefabs/interactions/generic_item_on_ground.tscn" id="5_sjt6k"]
-[ext_resource type="PackedScene" uid="uid://cgjc4wurbgimy" path="res://prefabs/UI/Inventory/Inventory.tscn" id="6_876p1"]
 [ext_resource type="Resource" uid="uid://cndd64batns31" path="res://resources/items/bucket.tres" id="6_nvnpb"]
-[ext_resource type="Script" uid="uid://cywyym5l7ymhr" path="res://scripts/CSharp/Common/Farming/FieldService.cs" id="7_3rkjv"]
+[ext_resource type="Script" uid="uid://12hleqx8amr8" path="res://scripts/CSharp/Common/Farming/FieldService.cs" id="7_3rkjv"]
 [ext_resource type="Resource" uid="uid://c5yg3lx756v4v" path="res://resources/items/hoe.tres" id="7_hv2km"]
-[ext_resource type="Resource" uid="uid://datee0flk1e84" path="res://resources/items/pickaxe.tres" id="8_hae25"]
+[ext_resource type="Resource" uid="uid://d1uuxp1lp4aro" path="res://resources/items/tomato_seed.tres" id="8_hv2km"]
+[ext_resource type="Script" uid="uid://c7eaa0neniiss" path="res://scripts/CSharp/Common/WorldManagement/SpawnPointMarker.cs" id="8_w0pbi"]
+[ext_resource type="Resource" uid="uid://daow8nx85vuc8" path="res://resources/spawnpoints/spawnpoint_game_start.tres" id="9_sal3e"]
+[ext_resource type="Resource" uid="uid://cipetn2hmnew4" path="res://resources/spawnpoints/from_test_scene.tres" id="10_sal3e"]
+[ext_resource type="PackedScene" uid="uid://bs3vs05wp5a20" path="res://prefabs/world_elements/world_change_trigger.tscn" id="11_43jow"]
+[ext_resource type="PackedScene" uid="uid://cidjhvp38n4b4" path="res://scenes/worlds/babushka_world_level_change_test.tscn" id="12_oux87"]
 
 [sub_resource type="PlaneMesh" id="PlaneMesh_8yprl"]
 
@@ -17,7 +21,11 @@ albedo_color = Color(0.505882, 0.588235, 0.494118, 1)
 [sub_resource type="BoxShape3D" id="BoxShape3D_t58di"]
 size = Vector3(2.01563, 0.160522, 2.00824)
 
-[node name="SceneFarmVesna" type="Node3D"]
+[sub_resource type="BoxShape3D" id="BoxShape3D_oux87"]
+size = Vector3(1, 1, 2.94604)
+
+[node name="WorldItemPickupTest" type="Node3D"]
+script = ExtResource("1_jnel3")
 
 [node name="MeshInstance3D" type="MeshInstance3D" parent="."]
 transform = Transform3D(10, 0, 0, 0, 10, 0, 0, 0, 10, 0, 0, 0)
@@ -31,10 +39,6 @@ surface_material_override/0 = SubResource("StandardMaterial3D_8tgff")
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.000976563, -0.0739136, -0.00112915)
 shape = SubResource("BoxShape3D_t58di")
 
-[node name="Player3d" parent="." node_paths=PackedStringArray("_fieldParent") instance=ExtResource("1_pdc5e")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -5.51633, 0.725631, 3.57249)
-_fieldParent = NodePath("../FieldService")
-
 [node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 0.618408, 0.785857, 0, -0.785857, 0.618408, -0.802612, 0, 4.73262)
 
@@ -42,8 +46,6 @@ transform = Transform3D(1, 0, 0, 0, 0.618408, 0.785857, 0, -0.785857, 0.618408,
 transform = Transform3D(0.5, 0, 0, 0, 0.5, 0, 0, 0, 0.5, 0, 0.0574723, 0)
 visible = false
 
-[node name="Inventory" parent="." instance=ExtResource("6_876p1")]
-
 [node name="FieldService" type="Node3D" parent="."]
 script = ExtResource("7_3rkjv")
 
@@ -67,7 +69,29 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 6.1678, -4.76837e-07, -3.9497
 _infiniteSupply = true
 
 [node name="SpawnWithItem" parent="GenericItemOnGround4" index="1"]
-_blueprint = ExtResource("8_hae25")
+_blueprint = ExtResource("8_hv2km")
+
+[node name="Spawnpoint" type="Node3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 1.87715, 0, 1.54015)
+script = ExtResource("8_w0pbi")
+spawnPointResource = ExtResource("9_sal3e")
+
+[node name="Spawnpoint tmp" type="Node3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -8.3672, 0, 0.113484)
+script = ExtResource("8_w0pbi")
+spawnPointResource = ExtResource("10_sal3e")
+
+[node name="WorldChangeTrigger" parent="." instance=ExtResource("11_43jow")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -9.78829, 0.546566, -0.241783)
+collision_mask = 17
+switchToWorld = ExtResource("12_oux87")
+switchToSpawnPoint = ExtResource("10_sal3e")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="WorldChangeTrigger"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.193655, 0, 0.233521)
+shape = SubResource("BoxShape3D_oux87")
+
+[connection signal="area_entered" from="WorldChangeTrigger" to="WorldChangeTrigger" method="AreaEnteredHandler"]
 
 [editable path="GenericItemOnGround"]
 [editable path="GenericItemOnGround2"]

scenes/worlds/babushka_world_level_change_test.tscn

@@ -0,0 +1,56 @@
+[gd_scene load_steps=11 format=3 uid="uid://cidjhvp38n4b4"]
+
+[ext_resource type="Script" uid="uid://6aq8mr0sofrs" path="res://scripts/CSharp/Common/WorldManagement/World.cs" id="1_nat7a"]
+[ext_resource type="PackedScene" uid="uid://bs3vs05wp5a20" path="res://prefabs/world_elements/world_change_trigger.tscn" id="5_tb7xe"]
+[ext_resource type="PackedScene" uid="uid://dbxy2y85r1d8x" path="res://scenes/worlds/Babushka_world_item_pickup_testing.tscn" id="6_evakd"]
+[ext_resource type="Script" uid="uid://c7eaa0neniiss" path="res://scripts/CSharp/Common/WorldManagement/SpawnPointMarker.cs" id="8_pl6uc"]
+[ext_resource type="Resource" uid="uid://daow8nx85vuc8" path="res://resources/spawnpoints/spawnpoint_game_start.tres" id="9_rutwt"]
+[ext_resource type="Resource" uid="uid://cipetn2hmnew4" path="res://resources/spawnpoints/from_test_scene.tres" id="10_s5gm8"]
+
+[sub_resource type="PlaneMesh" id="PlaneMesh_8yprl"]
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_8tgff"]
+albedo_color = Color(0.505882, 0.588235, 0.494118, 1)
+
+[sub_resource type="BoxShape3D" id="BoxShape3D_t58di"]
+size = Vector3(2.01563, 0.160522, 2.00824)
+
+[sub_resource type="BoxShape3D" id="BoxShape3D_tydq3"]
+size = Vector3(1, 1, 6.21814)
+
+[node name="WorldItemPickupTest" type="Node3D"]
+script = ExtResource("1_nat7a")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="."]
+transform = Transform3D(10, 0, 0, 0, 10, 0, 0, 0, 10, 0, 0, 0)
+mesh = SubResource("PlaneMesh_8yprl")
+skeleton = NodePath("")
+surface_material_override/0 = SubResource("StandardMaterial3D_8tgff")
+
+[node name="StaticBody3D" type="StaticBody3D" parent="MeshInstance3D"]
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="MeshInstance3D/StaticBody3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.000976563, -0.0739136, -0.00112915)
+shape = SubResource("BoxShape3D_t58di")
+
+[node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 0.618408, 0.785857, 0, -0.785857, 0.618408, -0.802612, 0, 4.73262)
+
+[node name="Spawnpoint" type="Node3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 1.87715, 0, 1.54015)
+script = ExtResource("8_pl6uc")
+spawnPointResource = ExtResource("9_rutwt")
+
+[node name="Spawnpoint tmp" type="Node3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 8.00564, 0, 0.0870138)
+script = ExtResource("8_pl6uc")
+spawnPointResource = ExtResource("10_s5gm8")
+
+[node name="WorldChangeTrigger" parent="." instance=ExtResource("5_tb7xe")]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 9.82414, 0, 0)
+switchToWorld = ExtResource("6_evakd")
+switchToSpawnPoint = ExtResource("10_s5gm8")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="WorldChangeTrigger"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -0.235657)
+shape = SubResource("BoxShape3D_tydq3")

scripts/CSharp/Common/CharacterControls/Player3D.cs

@@ -129,5 +129,11 @@ public partial class Player3D : CharacterBody3D
 		    animatedSprite.Visible = false;
 	    }
     }
-    
+
+    public void Teleport(Vector3 newPosition)
+    {
+	    GlobalPosition = newPosition;
+	    ResetPhysicsInterpolation();
+	    GD.Print("Player Teleported");
+    }
 }

scripts/CSharp/Common/CharacterControls/VesnaBehaviour.cs

@@ -15,6 +15,11 @@ public partial class VesnaBehaviour : Node
     {
         _farmingControls.FieldParent = _fieldParent;
     }
+
+    public void TeleportTo(Vector3 newPosition)
+    {
+        GetNode<Player3D>("CharacterBody3D").Teleport(newPosition);
+    }
     
     #region Farming
 

scripts/CSharp/Common/CharacterControls/VesnaBehaviour.cs.uid

@@ -0,0 +1 @@
+uid://xm0um640aes7

scripts/CSharp/Common/Farming/FieldService.cs.uid

@@ -0,0 +1 @@
+uid://12hleqx8amr8

scripts/CSharp/Common/Inventory/InventoryInstance.cs

@@ -12,6 +12,7 @@ public partial class InventoryInstance : Node
 
     [Signal]
     public delegate void SlotAmountChangedEventHandler();
+
     [Signal]
     public delegate void InventoryContentsChangedEventHandler();
 
@@ -32,54 +33,99 @@ public partial class InventoryInstance : Node
                     _slots.Add(new InventorySlot());
                 }
             }
+
             EmitSignal(SignalName.SlotAmountChanged);
         }
     }
-    
+
-    public InventoryActionResult AddItem(ItemInstance newItem, int inventorySlot = -1)
+    public InventoryActionResult AddItem(ItemInstance newItem)
     {
-        if (inventorySlot < 0)
+        var result = AddItemAndStackRecursive(newItem, 0);
+        EmitSignal(SignalName.InventoryContentsChanged);
+        return result;
+    }
+
+    private InventoryActionResult AddItemAndStackRecursive(ItemInstance newItem, int slotSearch)
+    {
+        if (newItem.blueprint == null || newItem.amount == 0)
+            return InventoryActionResult.SourceDoesNotExists;
+
+        var slotIndex = -1;
+        // find stackable slot
+        for (var i = slotSearch; i < _slots.Count; i++)
         {
-            inventorySlot = _slots.FindIndex(slot => slot.IsEmpty());
+            if (_slots[i].itemInstance?.blueprint == newItem.blueprint)
+            {
+                slotIndex = i;
+                break;
+            }
         }
-        
+
-        if (inventorySlot < 0 || !_slots[inventorySlot].IsEmpty())
+        if (slotIndex < 0)
+        {
+            // find empty slot
+            for (var i = slotSearch; i < _slots.Count; i++)
+            {
+                if (_slots[i].IsEmpty())
+                {
+                    slotIndex = i;
+                    break;
+                }
+            }
+        }
+
+        if (slotIndex < 0)
         {
             return InventoryActionResult.DestinationFull;
         }
-        
+
-        if (inventorySlot >= _slots.Count)
+        var itemInstance = _slots[slotIndex].itemInstance ?? new ItemInstance { blueprint = newItem.blueprint, amount = 0 };
-        {
+        var maxStack = itemInstance!.blueprint.maxStack;
-            return InventoryActionResult.DestinationDoesNotExists;
+        var freeOnStack = maxStack - itemInstance.amount;
-        }
+        var moveAmount = Math.Min(freeOnStack, newItem.amount);
-        
+        itemInstance.amount += moveAmount;
-        _slots[inventorySlot].itemInstance = newItem;
+        newItem.amount -= moveAmount;
-        EmitSignal(SignalName.InventoryContentsChanged);
+        _slots[slotIndex].itemInstance = itemInstance;
-        return InventoryActionResult.Success;
+        return newItem.amount <= 0
+            ? InventoryActionResult.Success
+            : AddItemAndStackRecursive(newItem, slotIndex + 1);
     }
-    
+
-    public InventoryActionResult RemoveItem(int inventorySlot, out ItemInstance? itemInstance )
+    public InventoryActionResult RemoveItem(int inventorySlot, out ItemInstance? itemInstance)
     {
         if (inventorySlot < 0 || inventorySlot >= _slots.Count)
         {
             itemInstance = null;
             return InventoryActionResult.SourceDoesNotExists;
         }
-        
+
         if (_slots[inventorySlot].IsEmpty())
         {
             itemInstance = null;
             return InventoryActionResult.SourceIsEmpty;
         }
-        
+
         itemInstance = _slots[inventorySlot].itemInstance;
         _slots[inventorySlot].itemInstance = null;
         EmitSignal(SignalName.InventoryContentsChanged);
         return InventoryActionResult.Success;
     }
-    
+
     public InventoryActionResult RemoveItem(int inventorySlot)
     {
         return RemoveItem(inventorySlot, out _);
     }
-}
+
+    public InventoryActionResult AddItemToSlot(ItemInstance itemInstance, int destinationSlot)
+    {
+        if (destinationSlot < 0 || destinationSlot >= _slots.Count)
+            return InventoryActionResult.DestinationDoesNotExists;
+        
+        if (!_slots[destinationSlot].IsEmpty())
+            return InventoryActionResult.DestinationFull;
+        
+        _slots[destinationSlot].itemInstance = itemInstance;
+        EmitSignal(SignalName.InventoryContentsChanged);
+        return InventoryActionResult.Success;
+    }
+}

scripts/CSharp/Common/Inventory/InventoryManager.cs

@@ -6,7 +6,7 @@ namespace Babushka.scripts.CSharp.Common.Inventory;
 public partial class InventoryManager : Node
 {
     public static InventoryManager Instance { get; private set; }
-    
+
     public InventoryInstance playerInventory;
 
     public override void _EnterTree()
@@ -23,11 +23,13 @@ public partial class InventoryManager : Node
     public InventoryActionResult CreateItem(
         ItemResource itemBlueprint,
         InventoryInstance inventory,
+        int amount = 1,
         int inventorySlot = -1)
     {
-        var newItem = new ItemInstance { blueprint = itemBlueprint };
+        var newItem = new ItemInstance { blueprint = itemBlueprint, amount = amount };
-        var addResult = inventory.AddItem(newItem, inventorySlot);
+        return inventorySlot < 0
-        return addResult;
+            ? inventory.AddItem(newItem)
+            : inventory.AddItemToSlot(newItem, inventorySlot);
     }
 
     public InventoryActionResult MoveItem(
@@ -39,10 +41,11 @@ public partial class InventoryManager : Node
         var remResult = sourceInventory.RemoveItem(sourceSlot, out var item);
         if (remResult != InventoryActionResult.Success) return remResult;
 
-        var addResult = destinationInventory.AddItem(item!, destinationSlot);
+        var addResult = destinationInventory.AddItemToSlot(item!, destinationSlot);
-        if(addResult == InventoryActionResult.Success) return InventoryActionResult.Success;
+        if (addResult == InventoryActionResult.Success) return InventoryActionResult.Success;
 
-        sourceInventory.AddItem(item!, sourceSlot); // can not fail ... in theory
+        // if adding in the destination failed, re-add the item into the source
+        sourceInventory.AddItemToSlot(item!, sourceSlot); // can not fail ... in theory
         return addResult;
     }
 
@@ -60,8 +63,9 @@ public partial class InventoryManager : Node
     {
         return inventory.RemoveItem(inventorySlot);
     }
+
     public InventoryActionResult CollectItem(ItemInstance itemInstance)
     {
         return playerInventory.AddItem(itemInstance);
     }
-}
+}

scripts/CSharp/Common/Inventory/InventoryUi.cs

@@ -43,6 +43,12 @@ public partial class InventoryUi : Control
             uiSlot!.nameLabel.Text = inventorySlot.itemInstance?.blueprint.name ?? "";
             uiSlot!.nameLabel.LabelSettings = uiSlot!.nameLabel.LabelSettings.Duplicate() as LabelSettings;
             uiSlot!.nameLabel.LabelSettings!.FontColor = inventorySlot.itemInstance?.blueprint.color ?? Colors.White;
+
+            var amountText = inventorySlot.itemInstance != null &&
+                             inventorySlot.itemInstance.amount != 1
+                ? inventorySlot.itemInstance.amount.ToString()
+                : "";
+            uiSlot!.amountLabel.Text = amountText;
         }
     }
 
@@ -99,6 +105,7 @@ public partial class InventoryUi : Control
         {
             InputInventoryOpenClose();
         }
+
         if (Input.IsActionJustPressed("ui_inventory_disadvance"))
         {
             _selectedSlot++;
@@ -106,7 +113,8 @@ public partial class InventoryUi : Control
                 _selectedSlot = 0;
             SetSlotSelectPosition();
         }
-        if(Input.IsActionJustPressed("ui_inventory_advance"))
+
+        if (Input.IsActionJustPressed("ui_inventory_advance"))
         {
             _selectedSlot--;
             if (_selectedSlot < 0)
@@ -143,4 +151,4 @@ public partial class InventoryUi : Control
             _slotOnMouse = null;
         }
     }
-}
+}

scripts/CSharp/Common/Inventory/ItemInstance.cs

@@ -3,4 +3,14 @@
 public class ItemInstance
 {
     public ItemResource blueprint;
+    public int amount = 1;
+
+    public ItemInstance Clone()
+    {
+        return new ItemInstance
+        {
+            blueprint = blueprint,
+            amount = amount
+        };
+    }
 }

scripts/CSharp/Common/Inventory/ItemOnGround.cs

@@ -25,7 +25,7 @@ public partial class ItemOnGround : Node3D
     {
         GD.Print("Trying to pick up item");
 
-        var result = InventoryManager.Instance.CollectItem(itemInstance);
+        var result = InventoryManager.Instance.CollectItem(itemInstance.Clone());
         if (result == InventoryActionResult.Success)
         {
             if (!_infiniteSupply)

scripts/CSharp/Common/Inventory/ItemResource.cs

@@ -2,17 +2,21 @@
 namespace Babushka.scripts.CSharp.Common.Inventory;
 
 [GlobalClass]
-public partial class ItemResource: Resource
+public partial class ItemResource : Resource
 {
     [Export]
     public string name;
 
     [Export]
     public Color color;
-    
+
+    [Export]
+    public int maxStack;
+
     public ItemResource()
     {
         name = "";
         color = Colors.Red;
+        maxStack = 1;
     }
 }

scripts/CSharp/Common/Inventory/SlotUi.cs

@@ -7,12 +7,14 @@ public partial class SlotUi : Control
 {
     public Label nameLabel;
     public int index;
+    public Label amountLabel;
 
     [Signal] public delegate void ClickedEventHandler(int index);
 
     public override void _EnterTree()
     {
         nameLabel = GetNode<Label>("NameLabel");
+        amountLabel = GetNode<Label>("AmountLabel");
     }
 
     public void _on_gui_input(InputEvent ev)

scripts/CSharp/Common/WorldManagement/SpawnPoint.cs.uid

@@ -0,0 +1 @@
+uid://bb4fc5y43ksfg

scripts/CSharp/Common/WorldManagement/SpawnPointMarker.cs

@@ -0,0 +1,8 @@
+using Godot;
+using System;
+using Babushka.scripts.CSharp.Common.WorldManagement;
+
+public partial class SpawnPointMarker : Node3D
+{
+    [Export] public SpawnPointResource spawnPointResource;
+}

scripts/CSharp/Common/WorldManagement/SpawnPointMarker.cs.uid

@@ -0,0 +1 @@
+uid://c7eaa0neniiss

scripts/CSharp/Common/WorldManagement/SpawnPointResource.cs

@@ -0,0 +1,14 @@
+using Godot;
+
+namespace Babushka.scripts.CSharp.Common.WorldManagement;
+
+[GlobalClass]
+public partial class SpawnPointResource : Resource
+{
+    [Export] public string name;
+
+    public SpawnPointResource()
+    {
+        name = "";
+    }
+}

scripts/CSharp/Common/WorldManagement/SpawnPointResource.cs.uid

@@ -0,0 +1 @@
+uid://cjr2efpm660kr

scripts/CSharp/Common/WorldManagement/World.cs

@@ -0,0 +1,21 @@
+using Godot;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Babushka.scripts.CSharp.Common.WorldManagement;
+
+public partial class World : Node
+{
+    public IReadOnlyDictionary<SpawnPointResource, SpawnPointMarker> SpawnPoints;
+
+    public override void _EnterTree()
+    {
+        GD.Print("World Enter Tree");
+        
+        // find all child nodes of type SpawnPoint
+        SpawnPoints = FindChildren("*")
+            .OfType<SpawnPointMarker>()
+            .Select(sp => new KeyValuePair<SpawnPointResource, SpawnPointMarker>(sp.spawnPointResource, sp))
+            .ToDictionary();
+    }
+}

scripts/CSharp/Common/WorldManagement/World.cs.uid

@@ -0,0 +1 @@
+uid://6aq8mr0sofrs

scripts/CSharp/Common/WorldManagement/WorldChangeTrigger.cs

@@ -0,0 +1,26 @@
+using Godot;
+using System;
+using Babushka.scripts.CSharp.Common.WorldManagement;
+
+public partial class WorldChangeTrigger : Area3D
+{
+    [Export] private PackedScene switchToWorld;
+    [Export] private SpawnPointResource switchToSpawnPoint;
+
+    public override void _EnterTree()
+    {
+        //AreaEntered += AreaEnteredHandler;
+    }
+
+    public override void _ExitTree()
+    {
+        //AreaEntered -= AreaEnteredHandler;
+    }
+
+    public void AreaEnteredHandler(Area3D area)
+    {
+        GD.Print("Area Entered");
+        var worldContainer = (WorldContainer)FindParent("WorldContainer");
+        worldContainer.SwitchWorld(switchToWorld, switchToSpawnPoint);
+    }
+}

scripts/CSharp/Common/WorldManagement/WorldChangeTrigger.cs.uid

@@ -0,0 +1 @@
+uid://cpbv0b3ahorep

scripts/CSharp/Common/WorldManagement/WorldContainer.cs

@@ -0,0 +1,41 @@
+using Godot;
+using System;
+using System.Linq;
+using Babushka.scripts.CSharp.Common.WorldManagement;
+
+public partial class WorldContainer : Node
+{
+    [Export] private PackedScene startingWorld;
+    [Export] private SpawnPointResource startingSpawnPoint;
+    
+    [Signal] public delegate void WorldChangedEventHandler(Vector3 spawnPointPosition);
+
+    public void SwitchWorld(PackedScene newWorldScene, SpawnPointResource spawnPoint)
+    {
+        // Unload the current world
+        if (GetChildCount() > 0)
+        {
+            GetChild(0).QueueFree();
+        }
+
+        // Load the new world
+        var newWorld = newWorldScene.Instantiate<World>();
+        AddChild(newWorld);
+
+        // Switch to the new spawn point
+        if (newWorld.SpawnPoints.TryGetValue(spawnPoint, out var spawnPointMarker))
+        {
+            EmitSignalWorldChanged(spawnPointMarker.GlobalPosition);
+        }
+        else
+        {
+            GD.PrintErr("Selected spawn point not found in the new world.");
+            EmitSignalWorldChanged(newWorld.SpawnPoints.First().Value.GlobalPosition);
+        }
+    }
+
+    public override void _Ready()
+    {
+        SwitchWorld(startingWorld,startingSpawnPoint);
+    }
+}

scripts/CSharp/Common/WorldManagement/WorldContainer.cs.uid

@@ -0,0 +1 @@
+uid://g338f4yomfo3