draw with triangle index and color constant buffer

StudyDx/Graphics.cpp

@@ -118,34 +118,28 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 			float y;
 			float z;
 		} pos;
-		struct
-		{
-			float r;
-			float g;
-			float b;
-		} color;
 	};
 
 	// create vertex buffer (8 vertices for one cube)
 	const Vertex vertices[] =
 	{
 		// left bottom back
-		{ -1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f },
+		{ -1.0f, -1.0f, -1.0f },
 		// right bottom back
-		{ 1.0f, -1.0f, -1.0f, 0.0f, 1.0f, 0.0f },
+		{ 1.0f, -1.0f, -1.0f },
 		// left top back
-		{ -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f },
+		{ -1.0f, 1.0f, -1.0f },
 		// right top back
-		{ 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f },
+		{ 1.0f, 1.0f, -1.0f },
 
 		// left bottom front
-		{ -1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 1.0f },
+		{ -1.0f, -1.0f, 1.0f },
 		// right bottom front
-		{ 1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 1.0f },
+		{ 1.0f, -1.0f, 1.0f },
 		// left top front
-		{ -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f },
+		{ -1.0f, 1.0f, 1.0f },
 		// right top front
-		{ 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f },
+		{ 1.0f, 1.0f, 1.0f },
 	};
 	wrl::ComPtr<ID3D11Buffer> pVertexBuffer;
 	D3D11_BUFFER_DESC bd = {};
@@ -235,6 +229,47 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 	// Bind constant buffer to vertex
 	pContext->VSSetConstantBuffers(0u, 1u, pConstantBuffer.GetAddressOf());
 
+
+
+	// Create constant buffer for color
+	struct ColorConstantBuffer
+	{
+		struct
+		{
+			float r;
+			float g;
+			float b;
+			float a;
+		} face_colors[6];
+	};
+
+	const ColorConstantBuffer ccb =
+	{
+		{
+			{ 1.0f, 0.0f, 1.0f },
+			{ 1.0f, 0.0f, 0.0f },
+			{ 0.0f, 1.0f, 0.0f },
+			{ 0.0f, 0.0f, 1.0f },
+			{ 1.0f, 1.0f, 0.0f },
+			{ 0.0f, 1.0f, 1.0f },
+		}
+	};
+	wrl::ComPtr<ID3D11Buffer> pColorConstantBuffer;
+	D3D11_BUFFER_DESC ccbd = {};
+	ccbd.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
+	ccbd.Usage = D3D11_USAGE_DEFAULT;
+	ccbd.CPUAccessFlags = 0u;
+	ccbd.MiscFlags = 0u;
+	ccbd.ByteWidth = sizeof(ccb);
+	ccbd.StructureByteStride = 0u;
+	D3D11_SUBRESOURCE_DATA ccsd = {};
+	ccsd.pSysMem = &ccb;
+	GFX_THROW_INFO(pDevice->CreateBuffer(&ccbd, &ccsd, &pColorConstantBuffer));
+
+	// Bind constant buffer to vertex
+	pContext->PSSetConstantBuffers(0u, 1u, pColorConstantBuffer.GetAddressOf());
+
+
 	// create pixel shader
 	wrl::ComPtr<ID3D11PixelShader> pPixelShader;
 	wrl::ComPtr<ID3DBlob> pBlob;
@@ -258,7 +293,7 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 	const D3D11_INPUT_ELEMENT_DESC ied[] =
 	{
 		{ "Position",0,DXGI_FORMAT_R32G32B32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0 },
-		{ "Color",0,DXGI_FORMAT_R32G32B32_FLOAT,0,12,D3D11_INPUT_PER_VERTEX_DATA,0 },
+		//{ "Color",0,DXGI_FORMAT_R32G32B32_FLOAT,0,12,D3D11_INPUT_PER_VERTEX_DATA,0 },
 	};
 	GFX_THROW_INFO(pDevice->CreateInputLayout(
 		ied, (UINT)std::size(ied),

StudyDx/PixelShader.hlsl

-float4 main( float3 color : Color) : SV_Target
+cbuffer CBuf
 {
-	return float4(color, 1.0f);
+	float4 face_color[6];
+};
+
+//float4 main( float3 color : Color) : SV_Target
+float4 main(uint tid: SV_PrimitiveID) : SV_Target
+{
+	//return float4(color, 1.0f);
+	return face_color[tid/2];
 }
\ No newline at end of file

StudyDx/StudyDx.vcxproj

@@ -180,6 +180,8 @@
       <ShaderType Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Pixel</ShaderType>
       <ObjectFileOutput Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(ProjectDir)%(Filename).cso</ObjectFileOutput>
       <ObjectFileOutput Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(ProjectDir)%(Filename).cso</ObjectFileOutput>
+      <ShaderModel Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">4.0</ShaderModel>
+      <ShaderModel Condition="'$(Configuration)|$(Platform)'=='Release|x64'">4.0</ShaderModel>
     </FxCompile>
     <FxCompile Include="VertexShader.hlsl">
       <ObjectFileOutput Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(ProjectDir)%(Filename).cso</ObjectFileOutput>

StudyDx/VertexShader.hlsl

-struct VSOut
-{
-	float3 color : Color;
-	float4 pos : SV_Position;
-};
-
 cbuffer CBuf
 {
 	matrix transform;
 };
 
-VSOut main( float3 pos : Position, float3 color : Color )
+float4 main( float3 pos : Position ): SV_Position
 {
-	VSOut vso;
-	vso.pos = mul( float4(pos, 1.0f), transform );
-	vso.color = color;
-
-	return vso;
+	return mul(float4(pos, 1.0f), transform);;
 }
\ No newline at end of file