做了下实验,以确定vtk渲染线的使用方式,
the pipe line should be a serial operation, any of extra modified to some part , we take the last modified.
for example,
map->Setinput(aa->GetOutput()); (1)
map->SetInput(bb->GetOutput()); (2)
then in piple line (1) is invalid in fact.
and any property changes to the rendering 3d object should changed from the source or the first in the pipeline.
!!