Graphics/Model: Add model loader

src/Nazara/Graphics/Formats/ModelMeshLoader.cpp

@@ -0,0 +1,56 @@
+// Copyright (C) 2024 Jérôme "SirLynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Graphics/Formats/ModelMeshLoader.hpp>
+#include <Nazara/Graphics/GraphicalMesh.hpp>
+#include <Nazara/Graphics/MaterialInstance.hpp>
+#include <Nazara/Graphics/Model.hpp>
+#include <Nazara/Utility/Mesh.hpp>
+#include <Nazara/Utility/Utility.hpp>
+#include <Nazara/Graphics/Debug.hpp>
+
+namespace Nz::Loaders
+{
+	ModelLoader::Entry GetModelLoader_Mesh()
+	{
+		ModelLoader::Entry loaderEntry;
+		loaderEntry.extensionSupport = [](std::string_view extension)
+		{
+			return Utility::Instance()->GetMeshLoader().IsExtensionSupported(extension);
+		};
+
+		loaderEntry.streamLoader = [](Stream& stream, const ModelParams& parameters) -> Result<std::shared_ptr<Model>, ResourceLoadingError>
+		{
+			std::shared_ptr<Mesh> mesh = Mesh::LoadFromStream(stream, parameters.mesh);
+			if (!mesh)
+				return Err(ResourceLoadingError::Unrecognized);
+
+			std::shared_ptr<GraphicalMesh> gfxMesh = GraphicalMesh::BuildFromMesh(*mesh);
+			if (!gfxMesh)
+				return Err(ResourceLoadingError::Internal);
+
+			std::shared_ptr<Model> model = std::make_shared<Model>(std::move(gfxMesh));
+			if (parameters.loadMaterials)
+			{
+				for (std::size_t matIndex = 0; matIndex < model->GetMaterialCount(); ++matIndex)
+				{
+					if (std::shared_ptr<MaterialInstance> matInstance = MaterialInstance::Build(mesh->GetMaterialData(matIndex)))
+						model->SetMaterial(matIndex, std::move(matInstance));
+				}
+			}
+
+			return model;
+		};
+
+		loaderEntry.parameterFilter = [](const ModelParams& parameters)
+		{
+			if (auto result = parameters.custom.GetBooleanParameter("SkipNativeMeshLoader"); result.GetValueOr(false))
+				return false;
+
+			return true;
+		};
+
+		return loaderEntry;
+	}
+}

src/Nazara/Graphics/Formats/ModelMeshLoader.hpp

@@ -0,0 +1,18 @@
+// Copyright (C) 2024 Jérôme "SirLynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_GRAPHICS_FORMATS_MODELMESHLOADER_HPP
+#define NAZARA_GRAPHICS_FORMATS_MODELMESHLOADER_HPP
+
+#include <NazaraUtils/Prerequisites.hpp>
+#include <Nazara/Graphics/Model.hpp>
+
+namespace Nz::Loaders
+{
+	ModelLoader::Entry GetModelLoader_Mesh();
+}
+
+#endif // NAZARA_GRAPHICS_FORMATS_MODELMESHLOADER_HPP

src/Nazara/Graphics/Graphics.cpp

@@ -15,6 +15,7 @@
 #include <Nazara/Graphics/PipelinePassList.hpp>
 #include <Nazara/Graphics/PostProcessPipelinePass.hpp>
 #include <Nazara/Graphics/PredefinedMaterials.hpp>
+#include <Nazara/Graphics/Formats/ModelMeshLoader.hpp>
 #include <Nazara/Graphics/Formats/PipelinePassListLoader.hpp>
 #include <Nazara/Graphics/Formats/TextureLoader.hpp>
 #include <Nazara/Utility/Font.hpp>
@@ -164,6 +165,7 @@ namespace Nz
 		Font::SetDefaultAtlas(std::make_shared<GuillotineTextureAtlas>(*m_renderDevice));
 
 		m_materialInstanceLoader.RegisterLoader(Loaders::GetMaterialInstanceLoader_Texture()); // texture to material loader
+		m_modelLoader.RegisterLoader(Loaders::GetModelLoader_Mesh());
 		m_pipelinePassListLoader.RegisterLoader(Loaders::GetPipelinePassListLoader()); // texture to material loader
 	}
 

src/Nazara/Graphics/Model.cpp

@@ -13,6 +13,11 @@
 
 namespace Nz
 {
+	bool ModelParams::IsValid() const
+	{
+		return mesh.IsValid();
+	}
+
 	Model::Model(std::shared_ptr<GraphicalMesh> graphicalMesh) :
 	m_graphicalMesh(std::move(graphicalMesh))
 	{
@@ -94,4 +99,28 @@ namespace Nz
 	{
 		return m_graphicalMesh->GetVertexBuffer(subMeshIndex);
 	}
+
+	std::shared_ptr<Model> Model::LoadFromFile(const std::filesystem::path& filePath, const ModelParams& params)
+	{
+		Graphics* graphics = Graphics::Instance();
+		NazaraAssert(graphics, "Graphics module has not been initialized");
+
+		return graphics->GetModelLoader().LoadFromFile(filePath, params);
+	}
+
+	std::shared_ptr<Model> Model::LoadFromMemory(const void* data, std::size_t size, const ModelParams& params)
+	{
+		Graphics* graphics = Graphics::Instance();
+		NazaraAssert(graphics, "Graphics module has not been initialized");
+
+		return graphics->GetModelLoader().LoadFromMemory(data, size, params);
+	}
+
+	std::shared_ptr<Model> Model::LoadFromStream(Stream& stream, const ModelParams& params)
+	{
+		Graphics* graphics = Graphics::Instance();
+		NazaraAssert(graphics, "Graphics module has not been initialized");
+
+		return graphics->GetModelLoader().LoadFromStream(stream, params);
+	}
 }