Prepare rendering pipeline for viewer SubViews
- Streamlined internal pipeline interface to use
RenderContextin all places - Removed shadow cascade target from Shadow stage, moved to
RenderScene - Added shadow update mode setting to
RenderScene - Removed
StageCameraandCameraBaseas members ofRenderPipeline
Changes in this MR are breaking if the old (non-RenderContext const& ctx) pipeline interface is still in use. Related MR for glow-samples: https://graphics.rwth-aachen.de:9000/Glow/glow-samples/merge_requests/3