very basic thing works

src/main.cpp

@@ -11,8 +11,8 @@ int main()
     Window window(1920, 1080);
     scene.startRender(
         Camera{
-            .position = glm::vec3(0, 0, 10),
+            .position = glm::vec3(0, 10, 10),
-            .direction = glm::vec3(0, 0, -1),
+            .direction = glm::vec3(0, -1, -1),
         },
         RenderParameter{
             .width = 1920,

src/scene/BVH.cpp

@@ -86,7 +86,7 @@ std::optional<IntersectionInfo> BVH::traceRay(Ray ray)
 
 std::vector<IntersectionInfo> BVH::generateIntersections(PNode& currentNode, Ray ray)
 {
-    if (!currentNode->aabb.intersects(ray, 0, 1))
+    if (!currentNode->aabb.intersects(ray, 0, std::numeric_limits<float>::max()))
     {
         return {};
     }

src/scene/Scene.cpp

@@ -49,7 +49,7 @@ void Scene::render(Camera camera, RenderParameter params)
             std::uniform_real_distribution<float> rnd02(0.0, 2.0);
             for (int h = 0; h < params.height; ++h)
             {
-              Ray cam = Ray(camera.position, camera.direction);
+              Ray cam = Ray(camera.position, glm::normalize(camera.direction));
               glm::vec3 cx =
                             glm::normalize(glm::cross(cam.direction, abs(cam.direction.y) < 0.9 ? glm::vec3(0, 1, 0) : glm::vec3(0, 0, 1))),
                         cy = glm::cross(cx, cam.direction);