Support lighting using a graphics buffer that is kep open!

JulietApp/main.cpp

@@ -1,5 +1,12 @@
 #include "main.h"
 
+#ifdef global
+#undef global
+#endif
+#include <ios>
+#include <iosfwd>
+#define global static
+
 #include <Core/Application/ApplicationManager.h>
 #include <Core/Common/EnumUtils.h>
 #include <Core/Common/String.h>
@@ -44,13 +51,6 @@ static bool ShowMemoryDebugger = false;
 
 using namespace Juliet;
 
-extern "C" {
-__declspec(dllexport) extern const unsigned int D3D12SDKVersion = 615;
-}
-extern "C" {
-__declspec(dllexport) extern const char* D3D12SDKPath = ".\\";
-}
-
 namespace
 {
     using GameInit_t     = void (*)(GameInitParams*);
@@ -64,6 +64,9 @@ namespace
     } Game;
 
     const char* GameFunctionTable[] = { "GameInit", "GameShutdown", "GameUpdate" };
+
+    LightID RedLightID  = 0;
+    LightID BlueLightID = 0;
 } // namespace
 
 void JulietApplication::Init(NonNullPtr<Arena>)
@@ -75,6 +78,7 @@ void JulietApplication::Init(NonNullPtr<Arena>)
 #if JULIET_DEBUG
     config.EnableDebug = true;
 #endif
+
     GraphicsDevice = CreateGraphicsDevice(config);
 
     MainWindow = CreatePlatformWindow("Juliet Editor", 1280, 720);
@@ -119,6 +123,21 @@ void JulietApplication::Init(NonNullPtr<Arena>)
                     SetMeshTransform(cube, MatrixTranslation(x, y, 0.0f) * rotation);
                 }
             }
+
+            // Start with some default test lights
+            PointLight redLight = {};
+            redLight.Position   = { 5.0f, 5.0f, 2.0f };
+            redLight.Radius     = 10.0f;
+            redLight.Color      = { 1.0f, 0.2f, 0.2f };
+            redLight.Intensity  = 5.0f;
+            RedLightID          = AddPointLight(redLight);
+
+            PointLight blueLight = {};
+            blueLight.Position   = { -5.0f, 0.0f, 2.0f };
+            blueLight.Radius     = 15.0f;
+            blueLight.Color      = { 0.2f, 0.2f, 1.0f };
+            blueLight.Intensity  = 8.0f;
+            BlueLightID          = AddPointLight(blueLight);
         }
 
         GameCode.Functions     = reinterpret_cast<void**>(&Game);
@@ -232,14 +251,23 @@ void JulietApplication::Update()
         }
     }
 
+    ArenaClear(GameScratchArena);
+
+    Vector3 redLightPos{ cosf(CameraTime * 2.0f) * 5.0f, sinf(CameraTime * 2.0f) * 5.0f, 2.0f };
+    SetPointLightPosition(RedLightID, redLightPos);
+    Vector3 blueLightPos{ -5.0f, cosf(CameraTime) * 3.0f, 2.0f };
+    SetPointLightPosition(BlueLightID, blueLightPos);
+
 #ifdef JULIET_ENABLE_IMGUI
-    // ImGui::ShowDemoWindow();
+    ImGui::ShowDemoWindow();
 #endif
 
     DebugDisplay_DrawLine({ 0.0f, 0.0f, 0.0f }, { 1.0f, 0.0f, 0.0f }, { 1.0f, 0.0f, 0.0f, 1.0f }, false);
     DebugDisplay_DrawLine({ 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, { 0.0f, 1.0f, 0.0f, 1.0f }, true);
     DebugDisplay_DrawLine({ 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 1.0f }, { 0.0f, 0.0f, 1.0f, 1.0f }, true);
     DebugDisplay_DrawSphere({ 0.0f, 0.0f, 0.0f }, 0.5f, { 1.0f, 1.0f, 0.0f, 1.0f }, true);
+    DebugDisplay_DrawSphere(blueLightPos, 0.5f, { 0.0f, 0.0f, 1.0f, 1.0f }, true);
+    DebugDisplay_DrawSphere(redLightPos, 0.5f, { 1.0f, 0.0f, 0.0f, 1.0f }, true);
 
     Game.Update(0.0f);