Bunch of changes + fixes

engine/include/sophia/scene.hpp

@@ -13,18 +13,17 @@ class Scene {
   Scene();
   ~Scene();
 
-  // Every entity gets a TagComponent (named `name`) and a TransformComponent.
   Entity createEntity(const std::string& name = {});
   void destroyEntity(Entity entity);
 
+  Entity createCamera(const std::string& name = "Camera");
+
   /** Calls `fn(Entity)` for every live entity. Defined in entity.hpp. */
   template <typename Fn>
   void forEachEntity(Fn&& fn);
 
-  // The camera a render request uses when it doesn't name one. Null until
-  // set.
-  entt::entity getActiveCamera() const { return activeCamera; }
-  void setActiveCamera(entt::entity camera) { activeCamera = camera; }
+  Entity getActiveCamera();
+  void setActiveCamera(Entity camera);
 
  private:
   friend class Entity;

engine/include/sophia/scene_view.hpp

@@ -17,8 +17,9 @@ enum class ClearFlags : u8 {
 
 struct SceneView {
   SceneHandle scene = INVALID_HANDLE;
-  RenderTargetHandle target = INVALID_HANDLE;
-  Entity camera;
+  RenderTargetHandle target =
+      INVALID_HANDLE;  // null implies render to swapchain
+  Entity camera;       // null implies use scene's active camera
 
   vec4 viewport{0.0f, 0.0f, 1.0f, 1.0f};