README screenshots.

README.md

@@ -9,38 +9,53 @@ that allow rendering geometry in 2D and 3D using custom GLSL shader programs.
 The Qtk desktop application provides a model loader using [Assimp](https://assimp.org/) within a Qt widget application.
 You can fly around the scene using WASD while holding down the right mouse button.
 
+Object names can be double-clicked in the tree view panel for quick camera navigation.
+Properties of the object, like shader code and translation / scale, can be viewed and modified in the side panel.
+
+![](resources/screenshots/screen.png)
+
+All side panels and toolbars are dockable widgets that can be popped out
+and reorganized as needed. Panels can also be stacked to create a docked widget with
+tabs. The central widget that provides the camera view into the scene cannot be
+detached from the main window in this way.
+
+![](resources/screenshots/screen-1.png)
+
+The small triangles floating near 3D models represent the light source being used for the shader.
+These appear on models using phong, specular, and diffuse lighting techniques.
+
+The default scene contains basic examples like texture mapping to make a crate from basic cube geometry
+
+![](resources/screenshots/screen-texture.png)
+
+Examples of Ambient, Diffuse, and Specular GLSL shaders.
+
+| Ambient                                               | Diffuse                                               | Specular                                               |
+|-------------------------------------------------------|-------------------------------------------------------|--------------------------------------------------------|
+| <img src="resources/screenshots/screen-ambient.png"/> | <img src="resources/screenshots/screen-diffuse.png"/> | <img src="resources/screenshots/screen-specular.png"/> |
+
+And more advanced techniques like Phong lighting (ambient + diffuse + specular) and normal mapping.
+
+![](resources/screenshots/screen-phong.png)
+
+| Normal Mapping Disabled                              | Normal Mapping Enabled                                 | 
+|------------------------------------------------------|--------------------------------------------------------|
+| <img src="resources/screenshots/spartan-phong.png"/> | <img src="resources/screenshots/spartan-normals.png"/> |
+
+See the `View` toolbar menu to enable debug console widgets for open scenes or reopen previously closed panels.
+
 Key features that are planned:
 
 - [x] Runtime loading of `.obj` or similar 3D models.
 - [x] Drag-and-drop interaction for adding objects to the scene.
+- [x] Shader / object properties panel to modify related settings.
 - [ ] Runtime reloading of modified GLSL shaders attached to objects within scenes.
 - [ ] Multiple views of a scene at one time.
 - [ ] Camera control modes such as panning, orbiting, or following objects.
 - [ ] Save / load for scene data. The current inheritance model is temporary.
 - [ ] Basic text editor for quickly modifying shaders attached to objects.
-- [ ] Shader / object properties panel to modify related settings.
 - [ ] Reduce size of application resources and git references.
 
-![](resources/screenshot.png)
-
-Spartan with no normals -
-
-![](resources/spartan-specular.png)
-
-Spartan with normals -
-
-![](resources/spartan-normals.png)
-
-Object names can be double-clicked in the tree view panel for quick camera
-navigation. All side panels and toolbars are dockable widgets that can be popped out
-and reorganized as needed. Panels can also be stacked to create a docked widget with
-tabs. The central widget that provides the camera view into the scene cannot be
-detached from the main window in this way. See the `View` menu to enable debug
-console widgets for open scenes or reopen previously closed panels.
-
-The small triangles floating near 3D models represent the light source being used for the shader.
-These appear on models using phong, specular, and diffuse lighting techniques.
-
 For examples of using the Qtk API, see the `example-app` project in the root of
 this repository.
 

resources/resources.qrc

@@ -46,8 +46,8 @@
         <file alias="solid-phong.vert">shaders/vertex/solid-phong.vert</file>
         <file alias="model-basic.frag">shaders/fragment/model-basic.frag</file>
         <file alias="model-basic.vert">shaders/vertex/model-basic.vert</file>
-        <file alias="model-specular.frag">shaders/fragment/model-specular.frag</file>
-        <file alias="model-specular.vert">shaders/vertex/model-specular.vert</file>
+        <file alias="model-phong.frag">shaders/fragment/model-phong.frag</file>
+        <file alias="model-phong.vert">shaders/vertex/model-phong.vert</file>
         <file alias="model-normals.frag">shaders/fragment/model-normals.frag</file>
         <file alias="model-normals.vert">shaders/vertex/model-normals.vert</file>
         <file alias="skybox.frag">skybox/skybox.frag</file>

src/app/qtkscene.cpp

@@ -260,8 +260,8 @@ void QtkScene::init()
   /* Test spartan Model with phong lighting, specular and normal mapping. */
   model = addObject(new Qtk::Model("spartanTest",
                                    ":/models/models/spartan/spartan.obj",
-                                   ":/shaders/model-normals.vert",
-                                   ":/shaders/model-normals.frag"));
+                                   ":/shaders/model-phong.vert",
+                                   ":/shaders/model-phong.frag"));
   model->getTransform().setTranslation(0.0f, -1.0f, 10.0f);
   model->getTransform().scale(2.0f);
   model->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));

src/app/treeview.cpp

@@ -41,36 +41,33 @@ void Qtk::TreeView::updateView(const Qtk::Scene * scene)
   mSceneName = scene->getSceneName();
   auto objects = scene->getObjects();
   for (const auto & object : objects) {
-    auto item =
-        new QTreeWidgetItem(QStringList(QString(object->getName().c_str())));
-    ui->treeWidget->insertTopLevelItem(0, item);
+    QStringList list(QStringList(QString(object->getName().c_str())));
+    ui->treeWidget->insertTopLevelItem(0, new QTreeWidgetItem(list));
   }
 }
 
 void Qtk::TreeView::itemFocus(QTreeWidgetItem * item, int column)
 {
-  QString name = item->text(column);
+  const QString & name = item->text(column);
   auto scene = MainWindow::getMainWindow()->getQtkWidget()->getScene();
-  auto & transform = Qtk::Scene::getCamera().getTransform();
   auto object = scene->getObject(name);
-  Transform3D * objectTransform;
   // If the object is a mesh or model, focus the camera on it.
   if (object == Q_NULLPTR) {
     qDebug() << "Attempt to get non-existing object with name '" << name
              << "'\n";
-  } else if (object->getType() == Object::QTK_MESH) {
-    objectTransform = &dynamic_cast<MeshRenderer *>(object)->getTransform();
-  } else if (object->getType() == Object::QTK_MODEL) {
-    objectTransform = &dynamic_cast<Model *>(object)->getTransform();
+    return;
   }
-  auto focusScale = objectTransform->getScale();
+  const Transform3D& objectTransform = object->getTransform();
+
+  auto & camera_transform = Qtk::Scene::getCamera().getTransform();
+  auto focusScale = objectTransform.getScale();
   float width = focusScale.x() / 2.0f;
   float height = focusScale.y() / 2.0f;
-  QVector3D pos = objectTransform->getTranslation();
+  QVector3D pos = objectTransform.getTranslation();
   // pos.setX(pos.x() + width);
   pos.setY(pos.y() + height);
-  transform.setTranslation(pos);
-  transform.translate(0.0f, 0.0f, 3.0f);
+  camera_transform.setTranslation(pos);
+  camera_transform.translate(0.0f, 0.0f, 3.0f);
 
   // Emit signal from qtk widget for new object focus. Triggers GUI updates.
   emit MainWindow::getMainWindow() -> getQtkWidget()->objectFocusChanged(name);

src/qtk/object.h

@@ -111,6 +111,11 @@ namespace Qtk
         return mTransform;
       }
 
+      [[nodiscard]] inline virtual Transform3D & getTransform()
+      {
+        return mTransform;
+      }
+
       [[nodiscard]] inline virtual std::string getVertexShader() const
       {
         return "Base Object has no vertex shader.";

src/qtk/scene.cpp

@@ -118,11 +118,9 @@ void Scene::setSkybox(Skybox * skybox)
 
 void Scene::initSceneObjectName(Object * object)
 {
-  if (!mObjectCount.count(object->getName())) {
-    mObjectCount[object->getName()] = 1;
-  } else {
-    mObjectCount[object->getName()]++;
-  }
+  mObjectCount[object->getName()] = mObjectCount.count(object->getName()) + 1;
+
+  // If the object exists make it's name unique.
   auto count = mObjectCount[object->getName()];
   if (count > 1) {
     object->setName(object->getName() + " (" + std::to_string(count) + ")");