mouse translation dxmath

hw3d/App.cpp

@@ -23,6 +23,10 @@ void App::DoFrame()
 {
 	const float c = sin( timer.Peek() ) / 2.0f + 0.5f;
 	wnd.Gfx().ClearBuffer( c,c,1.0f );
-	wnd.Gfx().DrawTestTriangle( timer.Peek() );
+	wnd.Gfx().DrawTestTriangle(
+		timer.Peek(),
+		wnd.mouse.GetPosX() / 400.0f - 1.0f,
+		-wnd.mouse.GetPosY() / 300.0f + 1.0f
+	);
 	wnd.Gfx().EndFrame();
 }
\ No newline at end of file

hw3d/Graphics.cpp

@@ -3,8 +3,10 @@
 #include <sstream>
 #include <d3dcompiler.h>
 #include <cmath>
+#include <DirectXMath.h>
 
 namespace wrl = Microsoft::WRL;
+namespace dx = DirectX;
 
 #pragma comment(lib,"d3d11.lib")
 #pragma comment(lib,"D3DCompiler.lib")
@@ -99,7 +101,7 @@ void Graphics::ClearBuffer( float red,float green,float blue ) noexcept
 	pContext->ClearRenderTargetView( pTarget.Get(),color );
 }
 
-void Graphics::DrawTestTriangle( float angle )
+void Graphics::DrawTestTriangle( float angle,float x,float y )
 {
 	HRESULT hr;
 
@@ -175,18 +177,16 @@ void Graphics::DrawTestTriangle( float angle )
 	// create constant buffer for transformation matrix
 	struct ConstantBuffer
 	{
-		struct
-		{
-			float element[4][4];
-		} transformation;
+		dx::XMMATRIX transform;
 	};
 	const ConstantBuffer cb =
 	{
 		{
-			(3.0f / 4.0f) * std::cos( angle ),	std::sin( angle ),	0.0f,	0.0f,
-			(3.0f / 4.0f) * -std::sin( angle ),	std::cos( angle ),	0.0f,	0.0f,
-			0.0f,								0.0f,				1.0f,	0.0f,
-			0.0f,								0.0f,				0.0f,	1.0f,
+			dx::XMMatrixTranspose(
+				dx::XMMatrixRotationZ( angle ) *
+				dx::XMMatrixScaling( 3.0f / 4.0f,1.0f,1.0f ) *
+				dx::XMMatrixTranslation( x,y,0.0f )
+			)
 		}
 	};
 	wrl::ComPtr<ID3D11Buffer> pConstantBuffer;

hw3d/Graphics.h

@@ -52,7 +52,7 @@ public:
 	~Graphics() = default;
 	void EndFrame();
 	void ClearBuffer( float red,float green,float blue ) noexcept;
-	void DrawTestTriangle( float angle );
+	void DrawTestTriangle( float angle,float x,float y );
 private:
 #ifndef NDEBUG
 	DxgiInfoManager infoManager;

hw3d/VertexShader.hlsl

@@ -6,7 +6,7 @@ struct VSOut
 
 cbuffer CBuf
 {
-	row_major matrix transform;
+	matrix transform;
 };
 
 VSOut main( float2 pos : Position,float3 color : Color )