adding more gui

src/main.cpp

@@ -31,11 +31,14 @@ int main()
     ImGui::Text("Render Parameters");
     ImGui::InputInt2("Dimensions", &render.width);
     ImGui::InputInt("Samples", &render.numSamples);
-
     if (ImGui::Button("Render"))
     {
       scene.startRender(camera, render);
     }
+    ImGui::Text("Render Stats");
+    ImGui::Text("Last Sample Time:    %.3f", scene.getLastSampleTime());
+    ImGui::Text("Average Sample Time: %.3f", scene.getAverageSampleTime());
+    ImGui::PlotLines("Sample Times", scene.getSampleTimes().data(), scene.getSampleTimes().size(), 0, 0, FLT_MAX, FLT_MAX, ImVec2(0, 40));
     window.update(scene.getImage());
   }
   return 0;

src/scene/Renderer.cpp

@@ -93,17 +93,18 @@ void Renderer::render(Camera camera, RenderParameter params)
 
               bvh.traceRay(r, payload, 1e-4, 1e20);
 
-              accumulator[w + h * params.width] += payload.accumulatedRadiance;
+              accumulator[w + h * params.width] += payload.accumulatedRadiance / float(params.numSamples);
             }
             co_return;
           }(w, samp));
     }
     threadPool.runBatch(std::move(batch));
     auto end = std::chrono::high_resolution_clock::now();
-    std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() << std::endl;
+    sampleTimes.push_back(std::chrono::duration_cast<std::chrono::microseconds>(end - start).count() / 1000.0f);
+    float resolver = float(params.numSamples) / float(samp);
     for (uint32_t i = 0; i < accumulator.size(); ++i)
     {
-      image[i] = glm::pow(glm::max((accumulator[i] / float(samp+1)), 0.0f), glm::vec3(0.45f));
+      image[i] = glm::pow(glm::max(accumulator[i] * resolver, 0.0f), glm::vec3(0.45f));
     }
   }
 }

src/scene/Renderer.h

@@ -1,8 +1,9 @@
 #pragma once
 #include "Scene.h"
-#include "window/Window.h"
-#include "util/Camera.h"
 #include "ThreadPool.h"
+#include "util/Camera.h"
+#include "window/Window.h"
+#include <numeric>
 
 struct RenderParameter
 {
@@ -18,11 +19,21 @@ class Renderer
   virtual ~Renderer();
   void startRender(Camera cam, RenderParameter params);
   constexpr const std::vector<glm::vec3>& getImage() const { return image; }
+  constexpr const std::vector<float>& getSampleTimes() const { return sampleTimes; }
+  constexpr const float getLastSampleTime() const { return sampleTimes.back(); }
+  constexpr const float getAverageSampleTime() const
+  {
+    return std::accumulate(sampleTimes.begin(), sampleTimes.end(), 0.0f) / sampleTimes.size();
+  }
+
 private:
   virtual void render(Camera cam, RenderParameter params);
   ThreadPool threadPool;
   std::thread worker;
   std::atomic_bool pendingCancel = false;
+  std::vector<float> sampleTimes;
+  float lastSampleTime;
+  float averageSampleTime;
   // the thing being displayed
   std::vector<glm::vec3> image;
   // radiance accumulator

src/util/Camera.h

@@ -6,7 +6,7 @@ struct Camera
     glm::vec3 position;
     glm::vec3 target;
     glm::vec2 sensorSize = glm::vec2(0.036, 0.024);
-    float S_O = 6.9;
+    float S_O = 20;
     float f = 0.7;
     float A = 0.35;
 };