[vtkusers] freeze one renderer in render window
patalog at mail.ru
Thu Jan 27 07:54:11 EST 2005
I have to renderers in window with 2 layers.
Main renderer at layer 1, and additional at layer 0.
In main renderer I have several actors (simple data sets) which I need to update frequently.
I do this in work thread (invalidate main window, which call
vtkRenderWindow::Render in WM_PAINT message handler). But in additional
render I have complex immutable data and rendering of them consumed much time.
Can I do "freeze" second renderer so, that it not changes during
vtkRenderWindow::Render but its previous result (when I've updtated
additional renderer "manulally") not erased? I try use BackingStoreOn, but without
result. Also, I try such "hack" - set SetLayer on additional
renderer to invalid number (> NumberOfLayers of render window) and when I need
this I set layer number to 0 again. In this way vtkRenderer::Render not called
from vtkRendererCollection::Render, but this caused error message "Invalid layer for renderer: not
rendered." and the result of previous redering erased by main renderer.
I can't set main renderer layer to 0 because I need the additional
renderer to be transparent.
PS VTK 4.4.0 VC 7.1 Win XP Pro SP2
patalog mailto:patalog at mail.ru
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