Add assimp as external dependency

app/mainwindow.ui

@@ -14,7 +14,7 @@
    <string>Qtk - MainWindow</string>
   </property>
   <widget class="QWidget" name="centralwidget">
-   <widget class="Qtk::MainWidget" name="openGLWidget">
+   <widget class="Qtk::MainWidget" name="openGLWidget" native="true">
     <property name="geometry">
      <rect>
       <x>10</x>
@@ -94,8 +94,8 @@
  </widget>
  <customwidgets>
   <customwidget>
-   <class>MainWidget</class>
-   <extends>QOpenGLWidget</extends>
+   <class>Qtk::MainWidget</class>
+   <extends>QWidget</extends>
    <header>mainwidget.h</header>
   </customwidget>
  </customwidgets>

app/scene.cpp

@@ -602,11 +602,7 @@ void ExampleScene::init()
 
 void ExampleScene::draw()
 {
-  mSkybox->draw();
-
-  for (auto & model : mModels) model->draw();
-
-  for (const auto &mesh : mMeshes) mesh->draw();
+  Scene::draw();
 
   mTestPhong->mProgram.bind();
   mTestPhong->setUniform("uModelInverseTransposed",

app/scene.h

@@ -17,12 +17,13 @@
 
 
 class ExampleScene : public Qtk::Scene {
+
 public:
   ExampleScene();
   ~ExampleScene();
 
   virtual void init();
-  virtual void draw();
+  virtual void draw() override;
   virtual void update();
 
 private: