Add new_scenes to prevent modifying the currently iterated scenes.

src/myou_engine.nim

@@ -165,6 +165,12 @@ proc myou_main_loop*(self: MyouEngine) =
     ##
     ## You usually don't need to call this. Use `run <#run,MyouEngine>`_
     ## instead.
+    # TODO: make a table object that can be iterated while changing, e.g. with a
+    # seq and a dirty flag to update the seq
+    if self.new_scenes.len != 0:
+        for name,scene in self.new_scenes.pairs:
+            self.scenes[name] = scene
+        self.new_scenes.clear()
     let time = getmonotime().ticks.float/1000000000
     let delta_seconds = time - last_time
     for _,scene in self.scenes.pairs:

src/scene.nim

@@ -95,7 +95,7 @@ proc initScene*(self: Scene, engine: MyouEngine, name: string = "Scene",
     while self.name in engine.scenes:
         collision_seq += 1
         self.name = name & "$" & $collision_seq
-    engine.scenes[self.name] = self
+    engine.new_scenes[self.name] = self
     self.mesh_passes.setLen 3
     self.world = newWorld(self)
     self.background_color = vec4(0, 0, 0, 1)

src/types.nim

@@ -85,6 +85,7 @@ type
         loaders_by_ext*: Table[string, seq[proc(e: MyouEngine): Loader]]
         glsl_version*: string
         all_framebuffers*: seq[Framebuffer] ## private
+        new_scenes*: Table[string, Scene] ## private
     
     # gameobject.nim