Remove large model resources from the build.

+ Remove Qtk::Skybox dependency on Qt resources.

src/app/CMakeLists.txt

@@ -9,14 +9,30 @@
 # Qtk Application
 ################################################################################
 
-set(QTK_GUI_SOURCES
-    qtkmainwindow.cpp qtkmainwindow.h qtkmainwindow.ui
-    qtkscene.cpp qtkscene.h
-    main.cpp
-)
+# Build without the example scene if QTK_GUI_SCENE is unset.
+if (QTK_GUI_SCENE)
+  set(QTK_GUI_SOURCES
+      qtkmainwindow.cpp qtkmainwindow.h qtkmainwindow.ui
+      # This scene will clone a git repository for required 3D models.
+      qtkscene.cpp qtkscene.h
+      main.cpp
+  )
+else()
+  # The scene will use a default skybox with no models or examples.
+  # Models can be added by click-and-dragging an .obj into the scene.
+  set(QTK_GUI_SOURCES
+      qtkmainwindow.cpp qtkmainwindow.h qtkmainwindow.ui
+      main.cpp
+  )
+endif()
+
 qt_add_executable(qtk_gui ${QTK_GUI_SOURCES})
 target_link_libraries(qtk_gui PRIVATE qtk_plugin_library)
 
+if (QTK_GUI_SCENE)
+  target_compile_definitions(qtk_gui PUBLIC QTK_GUI_SCENE)
+endif()
+
 if (WIN32)
   set_target_properties(qtk_gui PROPERTIES WIN32_EXECUTABLE TRUE)
 elseif(APPLE)

src/app/main.cpp

@@ -24,7 +24,11 @@ int main(int argc, char * argv[])
   // NOTE: We set the scene here and not in QtkMainWindow to detach the scene
   // from the QtkWidget plugin (qtk_plugin_library build target).
   // Once we can save / load scenes, this call, and QtkScene, can be removed.
+#ifdef QTK_GUI_SCENE
   window->setScene(new QtkScene);
+#else
+  window->setScene(new EmptyScene);
+#endif
 
   window->show();
 

src/app/qtkmainwindow.h

@@ -49,7 +49,17 @@ namespace Ui
  */
 class EmptyScene : public Qtk::Scene
 {
-    void init() override { setSceneName("Empty Scene"); }
+    void init() override
+    {
+      setSkybox(new Qtk::Skybox(":/textures/skybox/right.png",
+                                ":/textures/skybox/top.png",
+                                ":/textures/skybox/front.png",
+                                ":/textures/skybox/left.png",
+                                ":/textures/skybox/bottom.png",
+                                ":/textures/skybox/back.png",
+                                "Skybox"));
+      setSceneName("Empty Scene");
+    }
 };
 
 /**
@@ -97,7 +107,7 @@ class MainWindow : public QMainWindow
     Qtk::QtkWidget * getQtkWidget(const QString & name);
 
     /**
-       * @param scene The new scene to view.
+     * @param scene The new scene to view.
      */
     void setScene(Qtk::Scene * scene);
 

src/app/qtkscene.cpp

@@ -6,6 +6,10 @@
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
 ##############################################################################*/
 
+#include <QCoreApplication>
+#include <QDir>
+#include <QProcess>
+
 #include "qtkscene.h"
 
 using namespace Qtk;
@@ -35,8 +39,38 @@ QtkScene::~QtkScene()
 
 void QtkScene::init()
 {
+  // Clone qtk-resources if it doesn't already exist.
+  QDir repoDir("resources/");
+  if (!repoDir.exists()) {
+    qDebug() << "Cloning qtk-resources repository to '"
+             << repoDir.absolutePath() << "'...";
+
+    // Run git clone
+    QProcess gitProcess;
+    gitProcess.setWorkingDirectory(QCoreApplication::applicationDirPath());
+    gitProcess.start("git",
+                     {"clone",
+                      "https://git.shaunreed.com/shaunrd0/qtk-resources.git",
+                      repoDir.absolutePath()});
+
+    // Wait indefinitely for the process to complete
+    gitProcess.waitForFinished(-1);
+    // Check the result
+    if (gitProcess.exitCode() == 0) {
+      qDebug() << "Repository cloned successfully.";
+    } else {
+      qDebug() << "Git clone failed:" << gitProcess.readAllStandardError();
+    }
+  }
+
   // Add a skybox to the scene using default cube map images and settings.
-  setSkybox(new Qtk::Skybox("Skybox"));
+  setSkybox(new Qtk::Skybox(":/textures/skybox/right.png",
+                            ":/textures/skybox/top.png",
+                            ":/textures/skybox/front.png",
+                            ":/textures/skybox/left.png",
+                            ":/textures/skybox/bottom.png",
+                            ":/textures/skybox/back.png",
+                            "Skybox"));
 
   /* Create a red cube with a mini master chief on top. */
   auto myCube = new MeshRenderer("My cube", Cube(Qtk::QTK_DRAW_ELEMENTS));
@@ -44,8 +78,7 @@ void QtkScene::init()
   myCube->getTransform().setTranslation(5.0f, 0.0f, 0.0f);
   addObject(myCube);
 
-  auto mySpartan =
-      new Model("My spartan", ":/models/models/spartan/spartan.obj");
+  auto mySpartan = new Model("My spartan", QTK_SPARTAN);
   mySpartan->getTransform().setTranslation(5.0f, 0.5f, 0.0f);
   mySpartan->getTransform().setScale(0.5f);
   addObject(mySpartan);
@@ -82,31 +115,27 @@ void QtkScene::init()
   //
   // 3D Model loading
 
-  auto model = addObject(
-      new Qtk::Model("backpack", ":/models/models/backpack/backpack.obj"));
+  auto model = addObject(new Qtk::Model("backpack", QTK_BACKPACK));
   // Sometimes model textures need flipped in certain directions
   model->flipTexture("diffuse.jpg", false, true);
   model->getTransform().setTranslation(0.0f, 0.0f, -10.0f);
 
-  model = addObject(new Qtk::Model("bird", ":/models/models/bird/bird.obj"));
+  model = addObject(new Qtk::Model("bird", QTK_BIRD));
   model->getTransform().setTranslation(2.0f, 2.0f, -10.0f);
   // Sometimes the models are very large
   model->getTransform().scale(0.0025f);
   model->getTransform().rotate(-110.0f, 0.0f, 1.0f, 0.0f);
 
-  model = addObject(
-      new Qtk::Model("alien", ":/models/models/alien-hominid/alien.obj"));
+  model = addObject(new Qtk::Model("alien", QTK_ALIEN));
   model->getTransform().setTranslation(2.0f, -1.0f, -5.0f);
   model->getTransform().scale(0.15f);
 
-  model = addObject(
-      new Qtk::Model("My scythe", ":/models/models/scythe/scythe.obj"));
+  model = addObject(new Qtk::Model("My scythe", QTK_SCYTHE));
   model->getTransform().setTranslation(-6.0f, 0.0f, -10.0f);
   model->getTransform().rotate(-90.0f, 1.0f, 0.0f, 0.0f);
   model->getTransform().rotate(90.0f, 0.0f, 1.0f, 0.0f);
 
-  model = addObject(
-      new Qtk::Model("masterChief", ":/models/models/spartan/spartan.obj"));
+  model = addObject(new Qtk::Model("masterChief", QTK_SPARTAN));
   model->getTransform().setTranslation(-1.5f, 0.5f, -2.0f);
 
 
@@ -232,7 +261,7 @@ void QtkScene::init()
 
   /* Test alien Model with phong lighting and specular mapping. */
   model = addObject(new Qtk::Model("alienTest",
-                                   ":/models/models/alien-hominid/alien.obj",
+                                   QTK_ALIEN,
                                    ":/shaders/model-phong.vert",
                                    ":/shaders/model-phong.frag"));
   model->getTransform().setTranslation(3.0f, -1.0f, 10.0f);
@@ -259,7 +288,7 @@ void QtkScene::init()
 
   /* Test spartan Model with phong lighting, specular and normal mapping. */
   model = addObject(new Qtk::Model("spartanTest",
-                                   ":/models/models/spartan/spartan.obj",
+                                   QTK_SPARTAN,
                                    ":/shaders/model-phong.vert",
                                    ":/shaders/model-phong.frag"));
   model->getTransform().setTranslation(0.0f, -1.0f, 10.0f);

src/app/qtkscene.h

@@ -11,6 +11,12 @@
 
 #include <qtk/scene.h>
 
+#define QTK_SPARTAN "resources/models/spartan/spartan.obj"
+#define QTK_BACKPACK "resources/models/backpack/backpack.obj"
+#define QTK_BIRD "resources/models/bird/bird.obj"
+#define QTK_ALIEN "resources/models/alien-hominid/alien.obj"
+#define QTK_SCYTHE "resources/models/scythe/scythe.obj"
+
 /**
  * Example scene using QtkWidget to render 3D models and simple geometry within
  * QtOpenGLWidgets. This scene also shows some examples of using GLSL shaders to