DirectX 11 Pixel Shader What Is SV_POSITION?
I am learning HLSL for DirectX 11, and I was wondering what exactly is the SV_POSITION that is the output for a Vertex Shader, and the input for a Pixel Shader. 1: Is this x,y,z of every pixel on your screen, or of the object? 2: Why is it 4 32bit floats? 3: Do you need this System Variable for the vertex output? Thank you! The vertex shader stage only has one required output: the position of the vertex. This value is then used by the fixed-function rasterizer to compute which pixels are being drawn and invoke the pixel shader for each one. That's what the system value semantic SV_Position