Pull request #3: First draft pour level editor

Merge in CGD/gather-and-defend from feature/levelEditor to main

* commit 'ebe035840cc062c26e9d5bfff0592841f676280d':
  tidy up + add test tiles + small doc
  load et save feature pour level

Assets/LevelEditor.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 0ca30b5ca281be24bb62d7e48cc2bec8
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/LevelEditorScene.unity.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: a2ea25c4e51b97446a463af078807438
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Levels.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: c9341b1bdc1103b4e832cf62d29e5471
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Levels/Level.asset

@@ -0,0 +1,267 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &11400000
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 2b25d284985e65e48b50826c522a5ec3, type: 3}
+  m_Name: Level
+  m_EditorClassIdentifier: 
+  _data:
+  - _key: Background
+    tiles:
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -8, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -7, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -6, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -5, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -4, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -3, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -2, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: -1, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 0, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 1, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 2, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 3, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: -4, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: -2, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: 0, z: 0}
+    - _tile: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+      _position: {x: 4, y: 1, z: 0}
+  - _key: Entities
+    tiles:
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -8, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -8, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -8, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -8, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -6, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -6, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -6, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -6, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -4, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -4, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -4, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -4, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -2, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -2, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -2, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: -2, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 0, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 0, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 0, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 0, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 2, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 2, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 2, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 2, y: 1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 4, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 4, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 4, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+      _position: {x: 4, y: 1, z: 0}
+  - _key: Spawners
+    tiles:
+    - _tile: {fileID: 11400000, guid: 4aaf448680c7f8a438a9a5861c622a55, type: 2}
+      _position: {x: -8, y: -5, z: 0}
+    - _tile: {fileID: 11400000, guid: 4aaf448680c7f8a438a9a5861c622a55, type: 2}
+      _position: {x: -8, y: -3, z: 0}
+    - _tile: {fileID: 11400000, guid: 4aaf448680c7f8a438a9a5861c622a55, type: 2}
+      _position: {x: -8, y: -1, z: 0}
+    - _tile: {fileID: 11400000, guid: 4aaf448680c7f8a438a9a5861c622a55, type: 2}
+      _position: {x: -8, y: 1, z: 0}

Assets/LevelEditor/Levels/Level.asset.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: e715669e1ed4b294c82d07ac011e89bb
+NativeFormatImporter:
+  externalObjects: {}
+  mainObjectFileID: 11400000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 9008488c9d17dc44192b7729302f2d4f
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/Editor.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: ce5f79ab2e8e6fd48be52bcfd65416cf
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/Editor/LevelEditorCustomInspector.cs

@@ -0,0 +1,127 @@
+using UnityEditor;
+using UnityEngine.Tilemaps;
+using UnityEngine;
+using System.IO;
+using static UnityEngine.GraphicsBuffer;
+using UnityEditor.SceneManagement;
+
+namespace GatherAndDefend.LevelEditor
+{
+    [CustomEditor(typeof(LevelEditor))]
+    public class LevelEditorCustomInspector : Editor
+    {
+        const string defaultName = "Level";
+        const string extension = ".asset";
+
+        string _infoText = string.Empty;
+        public override void OnInspectorGUI()
+        {
+            EditorGUILayout.HelpBox(@"How to use : 
+- Path : you can optionally assign a folder in order to change the path to which the Level files will be created and saved
+- Level : the level file you're currently working on (for saving and loading purposes).
+- Create button : creates an empty level at given path, and assign it to the Level field in inspector.
+- Save button : saves all scene tilemaps' contents to the assigned level file.
+- Load button : iterates through all scene tilemaps and fills them according to what data can be found in the level file.
+
+Important considerations : 
+- the save and load buttons won't work if there is no Level assigned.
+- the loading won't work if the scene tilemap names aren't the same as the tilemap data keys in the Level file", MessageType.None);
+
+            DrawDefaultInspector();
+            if (GUILayout.Button(nameof(Create)))
+            {
+                Create();
+            }
+            if (GUILayout.Button(nameof(Save)))
+            {
+                Save();
+            }
+            if (GUILayout.Button(nameof(Load)))
+            {
+                Load();
+            }
+
+            if (_infoText != string.Empty)
+            {
+                EditorGUILayout.HelpBox(_infoText, MessageType.Error);
+            }
+        }
+        private string GetPath()
+        {
+            var targ = (LevelEditor)target;
+            var asset = EditorGUILayout.ObjectField(targ.Path, typeof(DefaultAsset), false);
+            if (!asset) return "Assets";
+            
+            return AssetDatabase.GetAssetPath(asset);
+        }
+        private void Create()
+        {
+            string path = GetPath();
+            if (!Directory.Exists(path))
+            {
+                _infoText = "the object assigned to Path is not a directory!";
+            }
+            LevelEditor targ = (LevelEditor)target;
+            _infoText = string.Empty;
+            string name = defaultName;
+            
+            if (File.Exists(path + "/" + name + extension))
+            {
+                var i = 0;
+                while (File.Exists(path + "/" + name + i + extension)) i++;
+                name += i;
+            }
+
+            var map = CreateInstance<Level>();
+            map.name = name;
+            AssetDatabase.CreateAsset(map, path + "/" + name + extension);
+            targ.Level = map;
+        }
+        private void Save()
+        {
+            string path = GetPath();
+            if (!Directory.Exists(path))
+            {
+                _infoText = "the object assigned to Path is not a directory!";
+                return;
+            }
+
+            LevelEditor targ = (LevelEditor)target;
+            if (!targ.Level)
+            {
+                _infoText = "no level to save to. please assign the Level field in the inspector.";
+                return;
+            }
+            string name = targ.Level.name;
+            var map = CreateInstance<Level>();
+            map.name = name;
+
+            foreach (Tilemap tilemap in targ.GetComponentsInChildren<Tilemap>())
+            {
+                map.Write(tilemap);
+            }
+
+            AssetDatabase.CreateAsset(map, path + "/" + name + extension);
+            targ.Level = map;
+            _infoText = string.Empty;
+        }
+        private void Load()
+        {
+            var targ = (LevelEditor)target;
+            if (!targ.Level)
+            {
+                _infoText = "no level to save to. please assign the Level field in the inspector.";
+                return;
+            }
+
+            foreach (Tilemap tilemap in targ.GetComponentsInChildren<Tilemap>())
+            {
+                tilemap.ClearAllTiles();
+                targ.Level.Read(tilemap);
+            }
+            _infoText = string.Empty;
+            EditorSceneManager.MarkAllScenesDirty();
+        }
+    }
+    
+}

Assets/LevelEditor/Scripts/Editor/LevelEditorCustomInspector.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 6eee7cfedfe2c8d4abdb8a5ef71d8158
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/LevelEditor.cs

@@ -0,0 +1,24 @@
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Tilemaps;
+
+namespace GatherAndDefend.LevelEditor
+{
+    public class LevelEditor : MonoBehaviour
+    {
+        [SerializeField]
+        private DefaultAsset _path;
+        [SerializeField]
+        private Level _level;
+        public Level Level
+        {
+            get => _level;
+            set => _level = value;
+        }
+        public DefaultAsset Path 
+        {
+            get => _path;
+            set => _path = value;
+        }
+    }
+}

Assets/LevelEditor/Scripts/LevelEditor.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f2aa8eca66833af4ba45af1319c90803
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/ScriptableObject.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 6642a2a073009cf448c580a617557cb1
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/ScriptableObject/Level.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using UnityEngine.Tilemaps;
+using UnityEngine;
+
+namespace GatherAndDefend.LevelEditor
+{
+    public class Level : ScriptableObject
+    {
+        [SerializeField]
+        private List<TilemapData> _data = new List<TilemapData>();
+        public void Write(Tilemap tilemap)
+        {
+            var data = new TilemapData();
+            data.SaveFromTilemap(tilemap);
+            _data.Add(data);
+        }
+        public void Read(Tilemap tilemap)
+        {
+            var data = _data.Find(x => x.Key == tilemap.name);
+            if (data == null) return;
+
+            data.LoadToTilemap(tilemap);
+        }
+    }
+}

Assets/LevelEditor/Scripts/ScriptableObject/Level.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 2b25d284985e65e48b50826c522a5ec3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/SpawnerTile.cs

@@ -0,0 +1,24 @@
+using UnityEngine;
+using UnityEngine.Tilemaps;
+
+[CreateAssetMenu(menuName = "Gather And Defend/Spawner Tile")]
+public class SpawnerTile : TileBase
+{
+    [SerializeField]
+    private Sprite _sprite;
+    [SerializeField]
+    private GameObject _prefab;
+
+    public override void GetTileData(Vector3Int position, ITilemap tilemap, ref TileData tileData)
+    {
+        tileData.sprite = _sprite;
+        tileData.transform.SetTRS(Vector3.zero, Quaternion.identity, Vector3.one);
+        tileData.color = Color.white;
+    }
+    public override bool StartUp(Vector3Int position, ITilemap tilemap, GameObject go)
+    {
+        if (!Application.isPlaying) return base.StartUp(position, tilemap, go);
+        Instantiate(_prefab, new Vector3(0.5f, 0.5f) + position, Quaternion.identity);
+        return base.StartUp(position, tilemap, go);
+    }
+}

Assets/LevelEditor/Scripts/SpawnerTile.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b28b3004abb3723498a355747c7cd899
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/TileData.cs

@@ -0,0 +1,24 @@
+using UnityEngine.Tilemaps;
+using UnityEngine;
+using System;
+
+namespace GatherAndDefend.LevelEditor
+{
+    [Serializable]
+    public class TileData
+    {
+        [SerializeField]
+        private TileBase _tile;
+        [SerializeField]
+        private Vector3Int _position;
+
+        public TileBase Tile => _tile;
+        public Vector3Int Position => _position;
+
+        public TileData(Vector3Int position, TileBase tile)
+        {
+            this._position = position;
+            this._tile = tile;
+        }
+    }
+}

Assets/LevelEditor/Scripts/TileData.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 60a5887e9e712d145b7baa6d1f0a779f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Scripts/TilemapData.cs

@@ -0,0 +1,47 @@
+using System.Collections.Generic;
+using UnityEngine.Tilemaps;
+using UnityEngine;
+using System;
+
+namespace GatherAndDefend.LevelEditor
+{
+    [Serializable]
+    public class TilemapData
+    {
+        [SerializeField]
+        private string _key;
+        [SerializeField]
+        private List<TileData> tiles;
+
+        public string Key => _key;
+
+        public void LoadToTilemap(Tilemap reference)
+        {
+            foreach (TileData data in tiles)
+            {
+                reference.SetTile(data.Position, data.Tile);
+            }
+        }
+        public void SaveFromTilemap(Tilemap reference)
+        {
+            _key = reference.name;
+            tiles = new List<TileData>();
+            BoundsInt bounds = reference.cellBounds;
+            for (int i = bounds.xMin; i <= bounds.xMax; i++)
+            {
+                for (int j = bounds.yMin; j <= bounds.yMax; j++)
+                {
+                    Vector3Int position = new Vector3Int(i, j);
+                    TileBase tile = reference.GetTile(position);
+                    if (!tile) continue;
+                    var tileData = new TileData(position, tile);
+                    tiles.Add(tileData);
+                }
+            }
+        }
+        public TilemapData()
+        {
+            tiles = new List<TileData>();
+        }
+    }
+}

Assets/LevelEditor/Scripts/TilemapData.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9acf8a297e0a8a14cbc0cf1e9011bbbe
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Tiles.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: f3dee7994db941e47b9445cb464c69a9
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/LevelEditor/Tiles/StickSpawner.asset

@@ -0,0 +1,17 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &11400000
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: b28b3004abb3723498a355747c7cd899, type: 3}
+  m_Name: StickSpawner
+  m_EditorClassIdentifier: 
+  _sprite: {fileID: 21300000, guid: 77a39e873655d3c4b93d0b7696397b83, type: 3}
+  _prefab: {fileID: 6962989255644195630, guid: 9b40c232eddfd1b469bea688e3c970c0, type: 3}
+  _repeat: 0

Assets/LevelEditor/Tiles/StickSpawner.asset.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 4aaf448680c7f8a438a9a5861c622a55
+NativeFormatImporter:
+  externalObjects: {}
+  mainObjectFileID: 11400000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Tilemaps.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 7810466df04bdc04aa991bdb8c3f611d
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Tilemaps/LevelEditorPalette.prefab

@@ -0,0 +1,244 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!1 &86010431647272150
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 2398097493298623612}
+  - component: {fileID: 7313241872231566393}
+  m_Layer: 0
+  m_Name: LevelEditorPalette
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &2398097493298623612
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 86010431647272150}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children:
+  - {fileID: 4542880158922887027}
+  m_Father: {fileID: 0}
+  m_RootOrder: 0
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!156049354 &7313241872231566393
+Grid:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 86010431647272150}
+  m_Enabled: 1
+  m_CellSize: {x: 1, y: 1, z: 0}
+  m_CellGap: {x: 0, y: 0, z: 0}
+  m_CellLayout: 0
+  m_CellSwizzle: 0
+--- !u!1 &5890485537825364348
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 4542880158922887027}
+  - component: {fileID: 6447175569849153967}
+  - component: {fileID: 5651166066249042033}
+  m_Layer: 0
+  m_Name: Layer1
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &4542880158922887027
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5890485537825364348}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 2398097493298623612}
+  m_RootOrder: 0
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!1839735485 &6447175569849153967
+Tilemap:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5890485537825364348}
+  m_Enabled: 1
+  m_Tiles:
+  - first: {x: -1, y: 0, z: 0}
+    second:
+      serializedVersion: 2
+      m_TileIndex: 0
+      m_TileSpriteIndex: 0
+      m_TileMatrixIndex: 0
+      m_TileColorIndex: 0
+      m_TileObjectToInstantiateIndex: 65535
+      dummyAlignment: 0
+      m_AllTileFlags: 1073741825
+  - first: {x: 0, y: 0, z: 0}
+    second:
+      serializedVersion: 2
+      m_TileIndex: 1
+      m_TileSpriteIndex: 1
+      m_TileMatrixIndex: 0
+      m_TileColorIndex: 0
+      m_TileObjectToInstantiateIndex: 65535
+      dummyAlignment: 0
+      m_AllTileFlags: 1073741825
+  - first: {x: -1, y: 1, z: 0}
+    second:
+      serializedVersion: 2
+      m_TileIndex: 2
+      m_TileSpriteIndex: 2
+      m_TileMatrixIndex: 0
+      m_TileColorIndex: 0
+      m_TileObjectToInstantiateIndex: 65535
+      dummyAlignment: 0
+      m_AllTileFlags: 0
+  m_AnimatedTiles: {}
+  m_TileAssetArray:
+  - m_RefCount: 1
+    m_Data: {fileID: 11400000, guid: a387250a316b97e43be83b85980101e1, type: 2}
+  - m_RefCount: 1
+    m_Data: {fileID: 11400000, guid: ef5a154519b23a34aaded32e86bf7f2f, type: 2}
+  - m_RefCount: 1
+    m_Data: {fileID: 11400000, guid: 4aaf448680c7f8a438a9a5861c622a55, type: 2}
+  m_TileSpriteArray:
+  - m_RefCount: 1
+    m_Data: {fileID: 21300000, guid: ccca3e050cb082b45af0a099790463f6, type: 3}
+  - m_RefCount: 1
+    m_Data: {fileID: 21300000, guid: 1f8a7d27b012449499d5316045662e1e, type: 3}
+  - m_RefCount: 1
+    m_Data: {fileID: 21300000, guid: 77a39e873655d3c4b93d0b7696397b83, type: 3}
+  m_TileMatrixArray:
+  - m_RefCount: 3
+    m_Data:
+      e00: 1
+      e01: 0
+      e02: 0
+      e03: 0
+      e10: 0
+      e11: 1
+      e12: 0
+      e13: 0
+      e20: 0
+      e21: 0
+      e22: 1
+      e23: 0
+      e30: 0
+      e31: 0
+      e32: 0
+      e33: 1
+  m_TileColorArray:
+  - m_RefCount: 3
+    m_Data: {r: 1, g: 1, b: 1, a: 1}
+  m_TileObjectToInstantiateArray: []
+  m_AnimationFrameRate: 1
+  m_Color: {r: 1, g: 1, b: 1, a: 1}
+  m_Origin: {x: -1, y: 0, z: 0}
+  m_Size: {x: 2, y: 2, z: 1}
+  m_TileAnchor: {x: 0.5, y: 0.5, z: 0}
+  m_TileOrientation: 0
+  m_TileOrientationMatrix:
+    e00: 1
+    e01: 0
+    e02: 0
+    e03: 0
+    e10: 0
+    e11: 1
+    e12: 0
+    e13: 0
+    e20: 0
+    e21: 0
+    e22: 1
+    e23: 0
+    e30: 0
+    e31: 0
+    e32: 0
+    e33: 1
+--- !u!483693784 &5651166066249042033
+TilemapRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5890485537825364348}
+  m_Enabled: 1
+  m_CastShadows: 0
+  m_ReceiveShadows: 0
+  m_DynamicOccludee: 0
+  m_StaticShadowCaster: 0
+  m_MotionVectors: 1
+  m_LightProbeUsage: 0
+  m_ReflectionProbeUsage: 0
+  m_RayTracingMode: 0
+  m_RayTraceProcedural: 0
+  m_RenderingLayerMask: 1
+  m_RendererPriority: 0
+  m_Materials:
+  - {fileID: 2100000, guid: a97c105638bdf8b4a8650670310a4cd3, type: 2}
+  m_StaticBatchInfo:
+    firstSubMesh: 0
+    subMeshCount: 0
+  m_StaticBatchRoot: {fileID: 0}
+  m_ProbeAnchor: {fileID: 0}
+  m_LightProbeVolumeOverride: {fileID: 0}
+  m_ScaleInLightmap: 1
+  m_ReceiveGI: 1
+  m_PreserveUVs: 0
+  m_IgnoreNormalsForChartDetection: 0
+  m_ImportantGI: 0
+  m_StitchLightmapSeams: 1
+  m_SelectedEditorRenderState: 0
+  m_MinimumChartSize: 4
+  m_AutoUVMaxDistance: 0.5
+  m_AutoUVMaxAngle: 89
+  m_LightmapParameters: {fileID: 0}
+  m_SortingLayerID: 0
+  m_SortingLayer: 0
+  m_SortingOrder: 0
+  m_ChunkSize: {x: 32, y: 32, z: 32}
+  m_ChunkCullingBounds: {x: 0, y: 0, z: 0}
+  m_MaxChunkCount: 16
+  m_MaxFrameAge: 16
+  m_SortOrder: 0
+  m_Mode: 0
+  m_DetectChunkCullingBounds: 0
+  m_MaskInteraction: 0
+--- !u!114 &5479319524895914250
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 12395, guid: 0000000000000000e000000000000000, type: 0}
+  m_Name: Palette Settings
+  m_EditorClassIdentifier: 
+  cellSizing: 0
+  m_TransparencySortMode: 0
+  m_TransparencySortAxis: {x: 0, y: 0, z: 1}

Assets/Tilemaps/LevelEditorPalette.prefab.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 638fe5717ed2f7d4e840158211fdddbf
+PrefabImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

ProjectSettings/ShaderGraphSettings.asset

@@ -0,0 +1,16 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &1
+MonoBehaviour:
+  m_ObjectHideFlags: 61
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: de02f9e1d18f588468e474319d09a723, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  customInterpolatorErrorThreshold: 32
+  customInterpolatorWarningThreshold: 16

ProjectSettings/TagManager.asset

@@ -11,7 +11,7 @@ TagManager:
   - 
   - Water
   - UI
-  - 
+  - InvisibleToCamera
   - 
   - 
   -