Added way to set global light from game.

+ Some clean up in the mesh renderer

Assets/source/RootConstants.hlsl

@@ -21,19 +21,21 @@ cbuffer RootConstants : register(b0, space0)
     uint     TransformsBufferIndex;
     uint     BufferIndex;
     uint     TextureIndex;
-    uint     VertexOffset; // Base vertex for indexed drawing with bindless buffers
+    uint     VertexOffset;          // Base vertex for indexed drawing with bindless buffers
-    uint     _Padding;     // Padding for alignment
-    float2   Scale;        // 2D scale factor
-    float2   Translate;    // 2D translation
-    float2   _Padding2;    // Explicit padding to align LightDirection to 16 bytes
-    
-    float3   GlobalLightDirection;  // Normalized, world-space
-    float    GlobalLightPad;
-    float3   GlobalLightColor;
-    float    GlobalAmbientIntensity;
-
     uint     LightBufferIndex;
     uint     ActiveLightCount;
+    float    GlobalAmbientIntensity;
+
+    float3   GlobalLightDirection;  // Normalized, world-space
+    uint     _Pad1;
+
+    float3   GlobalLightColor;
+    uint     _Pad2;
+    
+    float2   Scale;                 // 2D scale factor
+    float2   Translate;             // 2D translation
+
+    float4   MeshAlbedo;
 };
 
 

Assets/source/Triangle.vert.hlsl

@@ -27,7 +27,7 @@ Output main(uint vertexIndex : SV_VertexID)
 
     float4 worldPos = mul(Model, float4(pos, 1.0f));
     output.Position = mul(ViewProjection, worldPos);
-    output.Color = col;
+    output.Color = col * MeshAlbedo;
     output.WorldPosition = worldPos.xyz;
     
     float3 worldNormal = mul((float3x3)Model, normal);

Game/game.cpp

@@ -99,6 +99,12 @@ extern "C" JULIET_API void __cdecl GameUpdate(Juliet::GameData* params, [[maybe_
 
         printf("Door is %s\n", door->IsOpened ? "Opened" : "Closed");
         printf("Rock has %d health points\n", rock->Health);
+
+        // Summer at 2pm lighting
+        Vector3 sunDirection = { -0.2f, -0.9f, -0.3f };
+        Vector3 sunColor = { 1.0f, 0.95f, 0.85f };
+        float ambientIntensity = 0.4f;
+        SetGlobalLight(sunDirection, sunColor, ambientIntensity);
     }
 
     GameMode previousFrameMode = gGameState->Mode;

Juliet/include/Graphics/MeshRenderer.h

@@ -41,6 +41,7 @@ namespace Juliet
     JULIET_API void                  SetPointLightRadius(LightID id, float radius);
     JULIET_API void                  SetPointLightIntensity(LightID id, float intensity);
     JULIET_API void                  ClearPointLights();
+    JULIET_API void                  SetGlobalLight(const Vector3& direction, const Vector3& color, float ambientIntensity);
 
     // Assets & Instances
     [[nodiscard]] JULIET_API MeshAssetID GetOrCreateMeshAsset(String name);

Juliet/include/Graphics/PushConstants.h

@@ -14,17 +14,19 @@ namespace Juliet
         uint32 BufferIndex;
         uint32 TextureIndex;
         uint32 VertexOffset;
-        uint32 Padding;
+        uint32 LightBufferIndex;
+        uint32 ActiveLightCount;
+        float  GlobalAmbientIntensity;
+
+        Vector3 GlobalLightDirection;
+        uint32  Pad1;
+
+        Vector3 GlobalLightColor;
+        uint32  Pad2;
+        
         float  Scale[2];
         float  Translate[2];
-        float  Padding2[2];
         
-        Vector3 GlobalLightDirection;
+        Vector4 MeshAlbedo;
-        float   GlobalLightPad;
-        Vector3 GlobalLightColor;
-        float   GlobalAmbientIntensity;
-
-        uint32  LightBufferIndex;
-        uint32  ActiveLightCount;
     };
 } // namespace Juliet

Juliet/src/Graphics/DebugDisplayRenderer.cpp

@@ -310,13 +310,11 @@ namespace Juliet
             pushData.BufferIndex    = bufferIndex;
             pushData.TextureIndex   = 0;
             pushData.VertexOffset   = 0; // Depth-tested vertices start at 0
-            pushData.Padding        = 0;
             pushData.Scale[0] = 1.0f; pushData.Scale[1] = 1.0f;
             pushData.Translate[0] = 0.0f; pushData.Translate[1] = 0.0f;
             
             // Dummy light data as we don't light debug primitives
             pushData.GlobalLightDirection = {0,0,-1};
-            pushData.GlobalLightPad = 0;
             pushData.GlobalLightColor = {1,1,1};
             pushData.GlobalAmbientIntensity = 1.0f;
             
@@ -338,13 +336,11 @@ namespace Juliet
             pushData.BufferIndex    = bufferIndex;
             pushData.TextureIndex   = 0;
             pushData.VertexOffset   = kMaxDebugVertices / 2; // Overlay vertices start at half
-            pushData.Padding        = 0;
             pushData.Scale[0] = 1.0f; pushData.Scale[1] = 1.0f;
             pushData.Translate[0] = 0.0f; pushData.Translate[1] = 0.0f;
             
             // Dummy light data as we don't light debug primitives
             pushData.GlobalLightDirection = {0,0,-1};
-            pushData.GlobalLightPad = 0;
             pushData.GlobalLightColor = {1,1,1};
             pushData.GlobalAmbientIntensity = 1.0f;
             

Juliet/src/Graphics/MeshRenderer.cpp

@@ -33,6 +33,10 @@ namespace Juliet
 
             PointLight* MappedLights     = nullptr;
             Matrix*     MappedTransforms = nullptr;
+
+            Vector3 GlobalLightDirection   = { 0.0f, -1.0f, 0.0f };
+            Vector3 GlobalLightColor       = { 0.0f, 0.0f, 0.0f };
+            float   GlobalAmbientIntensity = 0.0f;
         };
 
         MeshRendererState g_MeshRenderer;
@@ -59,6 +63,10 @@ namespace Juliet
         CubePrimitiveMeshAssetID = CreateCubePrimitive();
         QuadPrimitiveMeshAssetID = CreateQuadPrimitive();
         // SpherePrimitiveMeshAssetID = CreateSpherePrimitive(); // Will implement later
+
+        // Create default material asset (ID = 0)
+        MaterialAsset defaultMaterial = {};
+        g_MeshRenderer.MaterialAssets.PushBack(defaultMaterial);
     }
 
     bool InitializeMeshRendererGraphics(NonNullPtr<GraphicsDevice> device, NonNullPtr<Window> window)
@@ -282,9 +290,9 @@ namespace Juliet
         pushData.LightBufferIndex       = lightDescriptorIndex;
         pushData.TransformsBufferIndex  = transformsDescriptorIndex;
         pushData.ActiveLightCount       = static_cast<uint32>(g_MeshRenderer.PointLights.Count);
-        pushData.GlobalLightDirection   = { 0.0f, -1.0f, 0.0f };
+        pushData.GlobalLightDirection   = g_MeshRenderer.GlobalLightDirection;
-        pushData.GlobalLightColor       = { 0.0f, 0.0f, 0.0f };
+        pushData.GlobalLightColor       = g_MeshRenderer.GlobalLightColor;
-        pushData.GlobalAmbientIntensity = 0.0f;
+        pushData.GlobalAmbientIntensity = g_MeshRenderer.GlobalAmbientIntensity;
 
         SetIndexBuffer(cmdList, g_MeshRenderer.IndexBuffer, IndexFormat::UInt16, g_MeshRenderer.Indices.Count, 0);
 
@@ -297,18 +305,16 @@ namespace Juliet
             }
 
             MeshAsset& meshAsset = g_MeshRenderer.MeshAssets.Data[instance.MeshAsset];
-            // If we used MaterialAsset, we would pass properties here.
+            MaterialAsset& materialAsset = g_MeshRenderer.MaterialAssets.Data[instance.MaterialAsset];
-            // For now, the shader doesn't read material color, or maybe we can pass it if PushData supports it.
-            // pushData has GlobalLightColor, but no individual mesh color yet. We can just keep it simple.
 
             pushData.MeshIndex    = meshIndex;
             pushData.TextureIndex = 0; // Would be instance.MaterialAsset.BaseColorTexture later
             pushData.VertexOffset = static_cast<uint32>(meshAsset.VertexOffset);
-            pushData.Padding      = 0;
             pushData.Scale[0]     = 1.0f;
             pushData.Scale[1]     = 1.0f;
             pushData.Translate[0] = 0.0f;
             pushData.Translate[1] = 0.0f;
+            pushData.MeshAlbedo   = materialAsset.AlbedoColor;
             SetPushConstants(cmdList, ShaderStage::Vertex, 0, sizeof(pushData) / 4, &pushData);
             DrawIndexedPrimitives(pass, static_cast<uint32>(meshAsset.IndexCount), 1,
                                   static_cast<uint32>(meshAsset.IndexOffset), static_cast<uint32>(meshAsset.VertexOffset), 0);
@@ -373,6 +379,13 @@ namespace Juliet
         g_MeshRenderer.PointLights.Clear();
     }
 
+    void SetGlobalLight(const Vector3& direction, const Vector3& color, float ambientIntensity)
+    {
+        g_MeshRenderer.GlobalLightDirection   = direction;
+        g_MeshRenderer.GlobalLightColor       = color;
+        g_MeshRenderer.GlobalAmbientIntensity = ambientIntensity;
+    }
+
     MeshAssetID GetCubePrimitiveMeshAssetID()
     {
         Assert(CubePrimitiveMeshAssetID != static_cast<MeshAssetID>(-1));

misc/build.bat

@@ -175,7 +175,7 @@ if /i "!CFG!"=="Debug" (
     set IMGUI_UNITY_SRCS=
 )
 
-set COMMON_LIBS=kernel32.lib user32.lib gdi32.lib dxguid.lib Ws2_32.lib dxgi.lib imm32.lib dwmapi.lib d3dcompiler.lib shell32.lib winhttp.lib delayimp.lib
+set COMMON_LIBS=kernel32.lib user32.lib gdi32.lib dxguid.lib Ws2_32.lib dxgi.lib imm32.lib dwmapi.lib d3dcompiler.lib dxcompiler.lib shell32.lib winhttp.lib delayimp.lib
 
 if defined IMGUI_UNITY_SRCS (
     echo STEP Compiling ImGui Shared Objs [!CFG!]>>"!PLAN_FILE!"

misc/recompile_shaders.bat

@@ -1,7 +1,13 @@
 @echo off
 setlocal enabledelayedexpansion
 
-set TARGET=x64-Release
+set TARGET=x64-Debug
+if not exist "bin\%TARGET%\JulietShaderCompiler.exe" (
+    set TARGET=x64-Release
+)
+if not exist "bin\%TARGET%\JulietShaderCompiler.exe" (
+    set TARGET=x64-Profile
+)
 
 REM Chemin relatif vers JulietShaderCompiler.exe
 set COMPILER_PATH=bin\%TARGET%\JulietShaderCompiler.exe