Graphics: Add PredefinedSkeletalData

examples/Showcase/main.cpp

@@ -147,7 +147,7 @@ int main()
 		std::shared_ptr<Nz::Material> bobMat = std::make_shared<Nz::Material>();
 
 		std::shared_ptr<Nz::MaterialPass> bobMatPass = std::make_shared<Nz::MaterialPass>(Nz::BasicMaterial::GetSettings());
-		bobMatPass->SetSharedUniformBuffer(0, renderBuffer);
+		bobMatPass->SetSharedUniformBuffer(1, renderBuffer);
 
 		bobMatPass->EnableDepthBuffer(true);
 		{

include/Nazara/Graphics/ForwardFramePipeline.hpp

@@ -10,8 +10,8 @@
 #include <Nazara/Prerequisites.hpp>
 #include <Nazara/Graphics/BakedFrameGraph.hpp>
 #include <Nazara/Graphics/Config.hpp>
-#include <Nazara/Graphics/DepthPipelinePass.hpp>
 #include <Nazara/Graphics/DebugDrawPipelinePass.hpp>
+#include <Nazara/Graphics/DepthPipelinePass.hpp>
 #include <Nazara/Graphics/ElementRenderer.hpp>
 #include <Nazara/Graphics/ForwardPipelinePass.hpp>
 #include <Nazara/Graphics/FramePipeline.hpp>

include/Nazara/Graphics/PredefinedShaderStructs.hpp

@@ -48,6 +48,17 @@ namespace Nz
 		static MaterialSettings::SharedUniformBlock GetUniformBlock(UInt32 bindingIndex, nzsl::ShaderStageTypeFlags shaderStages);
 	};
 
+	struct NAZARA_GRAPHICS_API PredefinedSkeletalData
+	{
+		std::size_t totalSize;
+		std::size_t jointMatricesOffset;
+
+		static constexpr std::size_t MaxMatricesCount = 256;
+
+		static PredefinedSkeletalData GetOffsets();
+		static MaterialSettings::SharedUniformBlock GetUniformBlock(UInt32 bindingIndex, nzsl::ShaderStageTypeFlags shaderStages);
+	};
+
 	struct NAZARA_GRAPHICS_API PredefinedViewerData
 	{
 		std::size_t eyePositionOffset;

src/Nazara/Graphics/BasicMaterial.cpp

@@ -151,16 +151,6 @@ namespace Nz
 			options.defaultValues
 		});
 
-		nzsl::FieldOffsets skeletalOffsets(nzsl::StructLayout::Std140);
-		skeletalOffsets.AddMatrixArray(nzsl::StructFieldType::Float1, 4, 4, true, 100);
-
-		settings.sharedUniformBlocks.push_back({
-			6,
-			"SkeletalData",
-			{},
-			nzsl::ShaderStageType::Vertex
-		});
-
 		// Common data
 		settings.textures.push_back({
 			3,
@@ -169,12 +159,12 @@ namespace Nz
 		});
 
 		settings.sharedUniformBlocks.push_back(PredefinedInstanceData::GetUniformBlock(4, nzsl::ShaderStageType::Vertex));
+		settings.sharedUniformBlocks.push_back(PredefinedSkeletalData::GetUniformBlock(6, nzsl::ShaderStageType::Vertex));
 		settings.sharedUniformBlocks.push_back(PredefinedViewerData::GetUniformBlock(5, nzsl::ShaderStageType_All));
-		//settings.sharedUniformBlocks.push_back(PredefinedInstanceData::GetUniformBlock(6, nzsl::ShaderStageType::Vertex));
 
 		settings.predefinedBindings[UnderlyingCast(PredefinedShaderBinding::InstanceDataUbo)] = 4;
 		settings.predefinedBindings[UnderlyingCast(PredefinedShaderBinding::OverlayTexture)] = 3;
-		//settings.predefinedBindings[UnderlyingCast(PredefinedShaderBinding::SkeletalDataUbo)] = 6;
+		settings.predefinedBindings[UnderlyingCast(PredefinedShaderBinding::SkeletalDataUbo)] = 6;
 		settings.predefinedBindings[UnderlyingCast(PredefinedShaderBinding::ViewerDataUbo)] = 5;
 
 		settings.shaders = options.shaders;

src/Nazara/Graphics/PredefinedShaderStructs.cpp

@@ -8,6 +8,7 @@
 
 namespace Nz
 {
+	// PredefinedLightData
 	PredefinedLightData PredefinedLightData::GetOffsets()
 	{
 		PredefinedLightData lightData;
@@ -51,6 +52,7 @@ namespace Nz
 		return uniformBlock;
 	}
 
+	// PredefinedInstanceData
 	PredefinedInstanceData PredefinedInstanceData::GetOffsets()
 	{
 		nzsl::FieldOffsets viewerStruct(nzsl::StructLayout::Std140);
@@ -85,6 +87,40 @@ namespace Nz
 		return uniformBlock;
 	}
 
+	// PredefinedSkeletalData
+	PredefinedSkeletalData PredefinedSkeletalData::GetOffsets()
+	{
+		nzsl::FieldOffsets skeletalStruct(nzsl::StructLayout::Std140);
+
+		PredefinedSkeletalData skeletalData;
+		skeletalData.jointMatricesOffset = skeletalStruct.AddMatrixArray(nzsl::StructFieldType::Float1, 4, 4, true, 100);
+
+		skeletalData.totalSize = skeletalStruct.GetAlignedSize();
+
+		return skeletalData;
+	}
+
+	MaterialSettings::SharedUniformBlock PredefinedSkeletalData::GetUniformBlock(UInt32 bindingIndex, nzsl::ShaderStageTypeFlags shaderStages)
+	{
+		PredefinedSkeletalData skeletalData = GetOffsets();
+
+		std::vector<MaterialSettings::UniformVariable> variables = {
+			{
+				{ "JointMatrices", skeletalData.jointMatricesOffset }
+			}
+		};
+
+		MaterialSettings::SharedUniformBlock uniformBlock = {
+			bindingIndex,
+			"SkeletalData",
+			std::move(variables),
+			shaderStages
+		};
+
+		return uniformBlock;
+	}
+
+	// PredefinedViewerData
 	PredefinedViewerData PredefinedViewerData::GetOffsets()
 	{
 		nzsl::FieldOffsets viewerStruct(nzsl::StructLayout::Std140);
@@ -132,5 +168,4 @@ namespace Nz
 
 		return uniformBlock;
 	}
-
 }

src/Nazara/Graphics/Resources/Shaders/Modules/Engine/SkeletalData.nzsl

@@ -1,7 +1,9 @@
 [nzsl_version("1.0")]
 module Engine.SkeletalData;
 
-const MaxJointCount: u32 = u32(200); //< FIXME: Fix integral value types
+// The minimum guaranteed UBO size by OpenGL and Vulkan is 16384, which is enough to store 256 4x4 matrices
+// We could store a bit more using mat3x4 matrices (341) but 256 bones is already a quite high limit for now
+const MaxJointCount: u32 = u32(256); //< FIXME: Fix integral value types
 
 [export]
 [layout(std140)]