Start aligning Dx and OpenGl approaches.

src/graphics/directx/DirectXMeshPainter.h

@@ -0,0 +1,60 @@
+#pragma once
+
+#include <wrl.h>
+#include <directxmath.h>
+#include <d3d12.h>
+
+#include <memory>
+#include <vector>
+
+class DrawingContext;
+class DirectXShaderProgram;
+class SceneModel;
+
+struct CD3DX12_CPU_DESCRIPTOR_HANDLE;
+
+class DirectXMeshPainter
+{
+public:
+    DirectXMeshPainter();
+
+    void paint(SceneModel* model, DrawingContext* context);
+
+    DirectXShaderProgram* getShaderProgram() const;
+
+    void createVertexBuffer(ID3D12Device* device);
+    void createRootSignature(ID3D12Device* device);
+    void createPipelineStateObject(ID3D12Device* device);
+
+    ID3D12PipelineState* getPipelineState() const;
+    ID3D12RootSignature* getRootSignature() const;
+
+    void updateCommandList(const CD3DX12_CPU_DESCRIPTOR_HANDLE& rtvHandle, ID3D12GraphicsCommandList* commandList);
+
+private:
+    struct Vertex
+    {
+        DirectX::XMFLOAT3 position;
+        DirectX::XMFLOAT4 color;
+    };
+
+    void initializeShader();
+    void initializeBuffers();
+
+    unsigned int getVertexBufferSize() const;
+    unsigned int getVertexSize() const;
+    void updateVertexBuffer(unsigned char* pBuffer) const;
+
+    void paint(const std::vector<float>& verts, const std::vector<unsigned>& elements, const std::vector<float>& color, bool lines = false);
+
+    unsigned int mVertexBufferSize{ 0 };
+    std::vector<Vertex> mVertexBuffer;
+
+    Microsoft::WRL::ComPtr<ID3D12Resource> mD3dVertexBuffer;
+    D3D12_VERTEX_BUFFER_VIEW mVertexBufferView{};
+
+    Microsoft::WRL::ComPtr<ID3D12RootSignature> mRootSignature;
+    Microsoft::WRL::ComPtr<ID3D12PipelineState> mPipelineState;
+
+    std::unique_ptr<DirectXShaderProgram> mShaderProgram;
+};