[Closed] The efficiency of mouseTrack and completeRedraw Function

hello.
I use mouseTrack Function to Draw something in viewport . But this Function can’t Redraw the viewport… so i mast add a completeRedraw() at end of the mission.

But when have a lot of objects in the viewport. the completeRedraw every time is so slow…

So. have other solvent??

Code like this:

fn _Draw msg ir obj faceNum shift ctrl alt =
(
local b
if msg==#mousepoint then
(
b=box()
b.pos=ir.pos
completeRedraw()
)
if msg==#mousemove then
(
b=box()
b.pos=ir.pos
completeRedraw()
)
if msg==#mouseabort then ok else #continue
)

mouseTrack trackCallBack:_Draw