Add shallow copy semantics to Camera's, Object's, and Scene's.

4 files changed, 57 insertions, 58 deletions

diff --git a/tests/glxx.cpp b/tests/glxx.cpp
index eb74209..aaf7b7b 100644
--- a/tests/glxx.cpp
+++ b/tests/glxx.cpp
@@ -26,37 +26,24 @@ int
 main() {
   using namespace Dimension;
 
-  // Set the resilience low for tests
-  resilience(SEVERITY_LOW);
-
-  // Background color
-  Color background = sRGB(0.0, 0.1, 0.25);
-  background.filter(0.1);
-
-  // Canvas
-  Canvas canvas(768, 480);
-
-  // Camera
-  Perspective_Camera camera(
-    Matrix::rotation(Vector(0.0, 1.0, 0.0))
-    * Matrix::translation(Vector(0.0, 0.0, -4.0))
-    * Matrix::scale(
-        Vector(static_cast<double>(canvas.width())/canvas.height(), 1.0, 1.0)
-      )
-  );
+  Scene scene = default_scene();
 
-  // Scene
-  Scene scene(background, camera, canvas);
+  Perspective_Camera& camera
+    = dynamic_cast<Perspective_Camera&>(scene.camera());
 
-  // Objects in scene
-
-  Sphere sphere;
-  sphere.trans(inverse(Matrix::scale(Vector(1.25, 1.25, 1.25))));
-  scene.push_object(sphere);
+  Cube* cube;
+  for (Scene::Iterator i = scene.begin(); i != scene.end(); ++i) {
+    cube = dynamic_cast<Cube*>(&*i);
+    if (cube) {
+      break;
+    }
+  }
+  if (!cube) {
+    throw Dimension_Error("Couldn't find a cube in the default scene.");
+  }
 
-  Cube cube;
-  cube.trans(inverse(Matrix::rotation(Vector(0.75, 0.0, 0.0))));
-  scene.push_object(cube);
+  // Set the resilience low for tests
+  resilience(SEVERITY_LOW);
 
   Raytracer raytracer(scene);
   GL_Drawer drawer(scene.canvas());
@@ -71,7 +58,7 @@ main() {
     drawer.draw();
     display.flush();
 
-    cube.trans(inverse(Matrix::rotation(Vector(0.025, 0.0, 0.0)))*cube.trans());
+    cube->trans(inverse(Matrix::rotation(Vector(0.025, 0.0, 0.0)))*cube->trans());
     camera.trans(Matrix::rotation(Vector(0.0, -0.05, 0.0))*camera.trans());
   }
 
diff --git a/tests/raytracexx.cpp b/tests/raytracexx.cpp
index c04e525..4202347 100644
--- a/tests/raytracexx.cpp
+++ b/tests/raytracexx.cpp
@@ -28,34 +28,7 @@ main() {
   // Set the resilience low for tests
   resilience(SEVERITY_LOW);
 
-  // Background color
-  Color background = sRGB(0.0, 0.1, 0.25);
-  background.filter(0.1);
-
-  // Canvas
-  Canvas canvas(768, 480);
-
-  // Camera
-  Perspective_Camera camera(
-    Matrix::rotation(Vector(0.0, 1.0, 0.0))
-    * Matrix::translation(Vector(0.0, 0.0, -4.0))
-    * Matrix::scale(
-        Vector(static_cast<double>(canvas.width())/canvas.height(), 1.0, 1.0)
-      )
-  );
-
-  // Scene
-  Scene scene(background, camera, canvas);
-
-  // Objects in scene
-
-  Sphere sphere;
-  sphere.trans(inverse(Matrix::scale(Vector(1.25, 1.25, 1.25))));
-  scene.push_object(sphere);
-
-  Cube cube;
-  cube.trans(inverse(Matrix::rotation(Vector(0.75, 0.0, 0.0))));
-  scene.push_object(cube);
+  Scene scene = default_scene();
 
   // Render the scene
   {
@@ -66,7 +39,7 @@ main() {
 
   // Write the canvas
   std::ofstream file("raytracexx.png");
-  PNG_Writer writer(canvas, file);
+  PNG_Writer writer(scene.canvas(), file);
   Progress progress = writer.write_async();
   std::cout << "Writing PNG file: " << progress << std::endl;
 
diff --git a/tests/testsxx.cpp b/tests/testsxx.cpp
index f3dcca5..399e50f 100644
--- a/tests/testsxx.cpp
+++ b/tests/testsxx.cpp
@@ -21,6 +21,41 @@
 
 namespace Dimension
 {
+  Scene
+  default_scene()
+  {
+    // Background color
+    Color background = sRGB(0.0, 0.1, 0.25);
+    background.filter(0.1);
+
+    // Canvas
+    Canvas canvas(768, 480);
+
+    // Camera
+    Perspective_Camera camera(
+      Matrix::rotation(Vector(0.0, 1.0, 0.0))
+      * Matrix::translation(Vector(0.0, 0.0, -4.0))
+      * Matrix::scale(
+          Vector(static_cast<double>(canvas.width())/canvas.height(), 1.0, 1.0)
+        )
+    );
+
+    // Scene
+    Scene scene(background, camera, canvas);
+
+    // Objects in scene
+
+    Sphere sphere;
+    sphere.trans(inverse(Matrix::scale(Vector(1.25, 1.25, 1.25))));
+    scene.push_object(sphere);
+
+    Cube cube;
+    cube.trans(inverse(Matrix::rotation(Vector(0.75, 0.0, 0.0))));
+    scene.push_object(cube);
+
+    return scene;
+  }
+
   Display::Display(const Canvas& canvas)
     : m_display(dmnsn_new_display(canvas.dmnsn()))
   {
diff --git a/tests/testsxx.hpp b/tests/testsxx.hpp
index 0e522ad..1101196 100644
--- a/tests/testsxx.hpp
+++ b/tests/testsxx.hpp
@@ -26,6 +26,10 @@
 
 namespace Dimension
 {
+  // Helper to return a basic scene
+  Scene default_scene();
+
+  // Display abstraction
   class Display
   {
   public: