improvement: add a way to start a scene after init

birb/core/scenemanager.lua

@@ -43,6 +43,7 @@ function SceneManager:setScene(scene)
     self:startTransition(scene)
   else
     self.currentScene = scene
+    self.currentScene:start()
     self.currentScene.isActive = true
   end
 end
@@ -73,12 +74,7 @@ end
 function SceneManager:update(dt)
   self.timers:update(dt)
   if (self.currentScene ~= nil) then
-    self.currentScene:updateStart(dt)
+    self.currentScene:updateScene(dt)
-    self.currentScene:setKeys()
-    self.currentScene.menusystem:update(dt)
-    self.currentScene:updateWorld(dt)
-    self.currentScene:update(dt)
-    self.currentScene:updateEnd(dt)
   end
 end
 
@@ -146,6 +142,7 @@ end
 function SceneManager:timerResponse(timer)
   if timer == "fadeOut" then
     self.currentScene = self.transition.nextScene
+    self.currentScene:start()
     self.currentScene:flushKeys(self.transition.duration / 2.5)
     self.currentScene.isActive = false
     core.screen:fadeOut(self.transition.duration / 2.5, self.transition.easeOut)
@@ -162,11 +159,7 @@ end
 function SceneManager:draw()
   self.controller.screen:apply()
   if (self.currentScene ~= nil) then
-    self.currentScene:drawStart()
+    self.currentScene:drawScene()
-    self.currentScene:drawWorld()
-    self.currentScene:draw()
-    self.currentScene.menusystem:draw()
-    self.currentScene:drawEnd()
   end
   self.controller.screen:cease()
 end

birb/modules/scenes.lua

@@ -32,7 +32,7 @@ local MenuSystem  = require(cwd .. "menusystem")
 -- INIT FUNCTIONS
 -- Initialize and configure the scene
 
-function Scene:new()
+function Scene:new(args)
   self.mouse = {}
   self.mouse.x, self.mouse.y = core.screen:getMousePosition()
 
@@ -45,11 +45,17 @@ function Scene:new()
   self:flushKeys()
   self.isActive = false
 
+  self.args = args
+
   self:initWorld()
 
   self:register()
 end
 
+function Scene:start()
+  -- Empty function
+end
+
 function Scene:register()
   core.scenemanager:setScene(self)
 end
@@ -61,6 +67,15 @@ end
 -- UPDATE FUNCTIONS
 -- Handle stuff that happens every steps
 
+function Scene:updateScene(dt)
+  self:updateStart(dt)
+  self:setKeys()
+  self.menusystem:update(dt)
+  self:updateWorld(dt)
+  self:update(dt)
+  self:updateEnd(dt)
+end
+
 function Scene:updateStart(dt)
 
 end
@@ -115,6 +130,14 @@ end
 -- DRAW FUNCTIONS
 -- Draw the scene and its content
 
+function Scene:drawScene()
+  self:drawStart()
+  self:drawWorld()
+  self:draw()
+  self.menusystem:draw()
+  self:drawEnd()
+end
+
 function Scene:drawStart()
 
 end