Fixed unstable FPS and profiler inaccuracy

Engine/Graphics/3DRenderer.cpp

@@ -3,7 +3,8 @@
 #include "../World/DbgCube.hpp"
 #include "../World/Tank.hpp"
 
-//#define DISABLE_INVISIBLE_VERTICES
+//#define DISABLE_AABB_CLIPPING
+//#define DISABLE_TRIANGLE_CLIPPING
 
 
 // Rendering pipeline:
@@ -113,7 +114,7 @@ void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
         // Object outside frustrum clipping
         projAABB.Transform(projAABB, oTMat);
         M3D_ContainmentType objInFrustrum = camFrustrum.Contains(projAABB);
-#ifndef DISABLE_INVISIBLE_VERTICES
+#ifndef DISABLE_AABB_CLIPPING
         if (objInFrustrum != DISJOINT)
 #endif
         {
@@ -140,10 +141,12 @@ void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
                         break;
 
                     // Triangle clipping
-                    //TODO: scissor/clipping depending of how many vertices are outside/inside the clipspace, implement complete Cohen-Sutherland algo or similar
+#ifndef DISABLE_TRIANGLE_CLIPPING
+                    //TODO: scissor/clipping depending of how many vertices are outside/inside the clipspace, implement complete Cohen-Sutherland algo or Cyrus–Beck one
                     if (VertexClipTest(projVertices[indicePtr[i]], mRTSize, 2.5f) &&
                         VertexClipTest(projVertices[indicePtr[i+1]], mRTSize, 2.5f) &&
                         VertexClipTest(projVertices[indicePtr[i+2]], mRTSize, 2.5f)) 
+#endif
                     {
                         
                         M3D_VECTOR V1 = M3D_V4LoadF4(&projVertices[indicePtr[i]]);

Game.cpp

@@ -52,19 +52,24 @@ Game::Game(std::shared_ptr<sf::RenderWindow> mainWnd, bool dbgFlag) : mbDbgModeE
 
 GAME_STATUS Game::Tick() {
     static std::vector<double> msTicksMonitoring;
-    static double mPrevdelta = 0;
     static double mLastCycleSleepDelta = 0;
     static unsigned int mFrameCnt = 0;
-    double mDelta = mSysTimer.GetDeltaTimeUs();
 
     // Debug performance computations
     if (mDbgUI != nullptr && mPerfsTimer != nullptr) {
         msTicksMonitoring.push_back(((1000000.f / TARGET_FPS) - mLastCycleSleepDelta) * TARGET_FPS / 1000000.f);
         if (mPerfsTimer->GetDeltaTime() >= 1000) {  // Every 1s
             // This average CPU/cycle_time method can monitor when CPU is in overload state (>0%) or in underload one (<0%)
-            double cpuUsage = 200 * std::accumulate(msTicksMonitoring.begin(), msTicksMonitoring.end(), static_cast<double>(0)) / msTicksMonitoring.size() - 100;
+            double cpuUsage = 100 * std::accumulate(msTicksMonitoring.begin(), msTicksMonitoring.end(), static_cast<double>(0)) / msTicksMonitoring.size();
 
-            mDbgUI->UpdateDebugData(cpuUsage, (((1000000.f / TARGET_FPS) - mLastCycleSleepDelta) / 1000), ((-mPrevdelta + mSysTimer.GetDeltaTimeUs()) / 1000), mFrameCnt, (PerfsGetVirtMem() / 1000), (PerfsGetPhysMem() / 1000));
+            mDbgUI->UpdateDebugData(
+                cpuUsage,
+                ((1000000.f / TARGET_FPS) - mLastCycleSleepDelta) / 1000,
+                1000.f / TARGET_FPS,
+                mFrameCnt,
+                PerfsGetVirtMem() / 1000,
+                PerfsGetPhysMem() / 1000
+            );
 
             mFrameCnt = 0;
             msTicksMonitoring.clear();
@@ -75,22 +80,20 @@ GAME_STATUS Game::Tick() {
     // Update game stats and internal stuff
     Update();
 
-    // Ugly way to wait for next frame... Maybe create a separate thread for rendering?
-    //while(time.GetDeltaTime() < (1000/TARGET_FPS)) {}   
+    // Loop the timer when reached the target FPS
+    if ((mSysTimer.GetDeltaTime() >= (1000/TARGET_FPS))) {
+        mSysTimer.Reset();
+        mFrameCnt++;
 
         // Process to the final rendering if the window have the focus
-    if (mSysTimer.GetDeltaTime() >= (1000/TARGET_FPS) && mMainWindow->hasFocus()) {
+        if (mMainWindow->hasFocus())
             Render();
-        mFrameCnt++;
-        mSysTimer.Reset();
-        mDelta = -mDelta;
     }
-    mPrevdelta = mDelta;
 
     // Sleep for remaining time to avoid useless CPU usage
-    mLastCycleSleepDelta = (1000000.f / TARGET_FPS) - (-mPrevdelta + mSysTimer.GetDeltaTimeUs());
+    mLastCycleSleepDelta = (1000000.f / TARGET_FPS) - mSysTimer.GetDeltaTimeUs();
     if (mLastCycleSleepDelta > 0)
-        sf::sleep(sf::microseconds(mLastCycleSleepDelta));
+        sf::sleep(sf::microseconds(mLastCycleSleepDelta + (1000000.f / TARGET_FPS * 0.02f)));
     else
         mLastCycleSleepDelta = 0;