Why do we need primitive assembly after vextex post processing?

The output of Vertex post processing is in Window space, here after (based on standard pipeline ) primitive assembling comes, why?

I know primitive assembly happens in many stages like before clipping, but why do we need PA at this stage.

Based on my understanding, do we need primitive assembly here to assemble vertex points generate after clipping, if so why PA happens in window space here?

https://stackoverflow.com/questions/66148196/why-do-we-need-primitive-assembly-after-vextex-post-processing February 11, 2021 at 11:05AM