Fixed the weird stutter and added fps in title bar

Juliet/include/Core/HAL/Display/Display.h

@@ -2,6 +2,7 @@
 
 #include <Core/Common/CoreTypes.h>
 #include <Core/Common/NonNullPtr.h>
+#include <Core/Common/String.h>
 #include <Juliet.h>
 
 namespace Juliet
@@ -16,4 +17,5 @@ namespace Juliet
     extern JULIET_API void HideWindow(NonNullPtr<Window> window);
 
     extern JULIET_API WindowID GetWindowID(NonNullPtr<Window> window);
+    extern JULIET_API void SetWindowTitle(NonNullPtr<Window> window, String title);
 } // namespace Juliet

Juliet/src/Core/HAL/Display/Display.cpp

@@ -149,6 +149,11 @@ namespace Juliet
         return window->ID;
     }
 
+    void SetWindowTitle(NonNullPtr<Window> window, String title)
+    {
+        g_CurrentDisplayDevice->SetWindowTitle(g_CurrentDisplayDevice, window, title);
+    }
+
     // Display Device Utils. Not exposed in the API
     DisplayDevice* GetDisplayDevice()
     {

Juliet/src/Core/HAL/Display/DisplayDevice.h

@@ -25,6 +25,7 @@ namespace Juliet
         void (*DestroyPlatformWindow)(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window);
         void (*ShowWindow)(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window);
         void (*HideWindow)(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window);
+        void (*SetWindowTitle)(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window, String title);
 
         // Events
         void (*PumpEvents)(NonNullPtr<DisplayDevice> self);

Juliet/src/Core/HAL/Display/Win32/Win32DisplayDevice.cpp

@@ -33,6 +33,7 @@ namespace Juliet::Win32
             device->DestroyPlatformWindow = DestroyPlatformWindow;
             device->ShowWindow            = ShowWindow;
             device->HideWindow            = HideWindow;
+            device->SetWindowTitle        = SetWindowTitle;
 
             device->PumpEvents = PumpEvents;
 

Juliet/src/Core/HAL/Display/Win32/Win32Window.cpp

@@ -92,4 +92,13 @@ namespace Juliet::Win32
         auto& win32State = static_cast<Window32State&>(*window->State);
         ::ShowWindow(win32State.Handle, SW_HIDE);
     }
+
+    void SetWindowTitle(NonNullPtr<DisplayDevice> /*self*/, NonNullPtr<Window> window, String title)
+    {
+        Assert(window);
+        Assert(window->State);
+
+        auto& win32State = static_cast<Window32State&>(*window->State);
+        SetWindowTextA(win32State.Handle, CStr(title));
+    }
 } // namespace Juliet::Win32

Juliet/src/Core/HAL/Display/Win32/Win32Window.h

@@ -25,4 +25,5 @@ namespace Juliet::Win32
     extern void DestroyPlatformWindow(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window);
     extern void ShowWindow(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window);
     extern void HideWindow(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window);
+    extern void SetWindowTitle(NonNullPtr<DisplayDevice> self, NonNullPtr<Window> window, String title);
 } // namespace Juliet::Win32

JulietApp/main.cpp

@@ -209,6 +209,22 @@ void JulietApplication::Update()
     lastTime = currentTime;
 
     CameraTime += deltaTime;
+
+    static float fpsTimer  = 0.0f;
+    static int   fpsFrames = 0;
+    fpsTimer += deltaTime;
+    fpsFrames++;
+    if (fpsTimer >= 0.5f)
+    {
+        float fps = static_cast<float>(fpsFrames) / fpsTimer;
+        float ms  = (fpsTimer / static_cast<float>(fpsFrames)) * 1000.0f;
+        char title[64];
+        snprintf(title, sizeof(title), "Juliet | %.1f FPS | %.2f ms", static_cast<double>(fps), static_cast<double>(ms));
+        SetWindowTitle(MainWindow, WrapString(title));
+        fpsTimer  = 0.0f;
+        fpsFrames = 0;
+    }
+
     bool        reloadShaders         = false;
     static bool reloadShadersDebounce = false;
 
@@ -339,8 +355,8 @@ Camera JulietApplication::GetDebugCamera()
 
     float radius = baseRadius;
     //* Uncomment for active zoom
-    float zoomAmplitude = 10.0f; // Oscillate between 1.5m and 3.5m away
+    float zoomAmplitude = 15.0f;
-    float zoomSpeed     = 0.8f;
+    float zoomSpeed     = 0.5f;
     radius              = baseRadius + (sinf(time * zoomSpeed) * zoomAmplitude);
     //*/
     float zHeight = radius * 0.5f; // Keep a nice downward viewing angle