rough outline

src/scene/Scene.cpp

@@ -6,17 +6,29 @@ Scene::~Scene() {}
 
 void Scene::render(int width, int height, int numSamples)
 {
-    image.clear();
-    accumulator.clear();
-    image.resize(width * height * 3);
-    accumulator.resize(width * height * 3);
-    for (int samp = 0; samp < numSamples; ++samp)
-    {
-        for (int w = 0; w < width; ++w)
+    worker = std::thread(
+        [&]()
         {
-            for (int h = 0; h < height; ++h)
+            image.clear();
+            accumulator.clear();
+            image.resize(width * height * 3);
+            for (int samp = 0; samp < numSamples; ++samp)
             {
+                std::function<void()> job = [&]()
+                {
+                    std::vector<unsigned char> localAccumulator(width * height * 3);
+                    for (int w = 0; w < width; ++w)
+                    {
+                        for (int h = 0; h < height; ++h)
+                        {
+                            if (cancel)
+                                return;
+                            bvh.traceRay();
+                        }
+                    }
+                    // lock image
+                    // add result to image
+                };
             }
-        }
-    }
+        });
 }

src/scene/Scene.h

@@ -3,12 +3,24 @@
 #include "window/Window.h"
 #include "util/Camera.h"
 
+/// <summary>
+/// Ray1
+/// Ray2
+/// Ray3
+/// Ray4
+/// Ray5
+/// GammaResolve
+/// Ray1
+/// Ray2
+/// Ray3
+/// </summary>
 class Scene
 {
   public:
     Scene();
     ~Scene();
     void render(Camera cam, int width, int height, int numSamples);
+    constexpr const std::vector<unsigned char>& getImage() const { return image; }
   private:
     // the thing being displayed
     std::vector<unsigned char> image;