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
+                };
             }
-        }
-    }
+        });
 }