ジオメトリシェーダーで三角
アプリコードはそのままで点を三角形にする。
シェーダーコード
struct VS_INPUT { float4 Pos : POSITION; }; struct GS_INPUT { float4 Pos : POSITION; }; typedef GS_INPUT VS_OUTPUT; struct PS_INPUT { float4 Pos : SV_POSITION; float4 Col : COLOR0; }; typedef PS_INPUT GS_OUTPUT; //-------------------------------------------------------------------------------------- // Vertex Shader //-------------------------------------------------------------------------------------- VS_OUTPUT VS( VS_INPUT input ) { VS_OUTPUT output = (VS_OUTPUT)0; output.Pos = input.Pos; return output; } //-------------------------------------------------------------------------------------- // Geometry Shader //-------------------------------------------------------------------------------------- [maxvertexcount(3)] void GS( point GS_INPUT input[1], inout TriangleStream<PS_INPUT> stream ) { GS_OUTPUT output = (GS_OUTPUT)0; output.Pos = input[0].Pos; output.Col = float4(1.0f, 0.0f, 0.0f, 1.0f); stream.Append(output); output.Pos = input[0].Pos + float4(0.1f, -0.1f, 0.0f, 0.0f); output.Col = float4(0.0f, 1.0f, 0.0f, 1.0f); stream.Append(output); output.Pos = input[0].Pos + float4(-0.1f, -0.1f, 0.0f, 0.0f); output.Col = float4(0.0f, 1.0f, 1.0f, 1.0f); stream.Append(output); stream.RestartStrip(); } //-------------------------------------------------------------------------------------- // Pixel Shader //-------------------------------------------------------------------------------------- float4 PS( PS_INPUT input ) : SV_Target { return input.Col; }