![[../../00 Asset Bank/Pasted image 20240916141610.png|invert_B]] [[../Math/Coordinate System|Coordinate System]] for any device's [[Screen]] that the GPU maps to the physical device. When rendering to some [[Device]], we render to [[Normalised Device Coordinates|NDC]] and the [[GPU]] maps the [[Standard Square]] to the physical device ([[Device Space]]). >[!tip] [[OpenGL]] NDC's, up is $-y$ ![[../../00 Asset Bank/Pasted image 20240916141512.png|invert_B]] >[!example] Inverse NDC for OpenGL ($+y$ is down) >$\huge \let S^{-1} : S_{\left<w,h \right>} \to \mathbf{NDC} $ >$\huge S^{-1} = \mat{ \frac{1}{w} & 0 & 0 \\ 0 & -\frac{1}{h} & 0 \\ 0 & 0 & 1} $