id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	notify_on_close	platform	project
9677	Segmentation systems should use instanced drawing where they can	Zach Pearson	Zach Pearson	"Currently the previews of a segmentation in 2D use copies of the cursor where the center of a new copy is wherever the mouse was while the previous frame was being generated. 

This is very slow. 

For 3D segmentations it's even slower: On every mouseMoved event the points inside the sphere used to control the 3D segmentation are filled in in the underlying volume. The slowest part of doing it live is recomputing the surface every frame, actually filling the data in is very fast. It would be good to just show a preview of what will be segmented by instancing the spheres -- maybe at a low opacity -- and then filling them in then updating the surface once."	enhancement	assigned	high		DICOM								all	ChimeraX