<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:verdana,helvetica,sans-serif;font-size:10pt"><div>I found a solution! I made the renderer in front non interactive, and it seems to work fine now. I simply did:<br><br>renderer->InteractiveOff()<br></div><div style="font-family: verdana,helvetica,sans-serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> John Eke <tonee47@yahoo.com><br><b><span style="font-weight: bold;">To:</span></b> vtkusers@vtk.org<br><b><span style="font-weight: bold;">Sent:</span></b> Thursday, August 20, 2009 6:30:54 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [vtkusers] vtkRenderer goes dark on zoom<br></font><br>
<div style="font-family: verdana,helvetica,sans-serif; font-size: 10pt; color: rgb(0, 0, 0);"><div>Hi Guys,<br><br>I have 2 renderers layered one over top of the other. The renderer behind holds a bunch of images, and the renderer in front acts as a drawing plane where a user can draw over the image.<br><br>Problem is, both renderers come up fine. But once I zoom in, everything goes dark. However, once I draw somthing on the front renderer, THEN zoom... everything seems happy. So it appears vtk didnt like the fact that the top renderer was empty.<br><br>Does anyone have any experience with this? Please help.<br><br>Thanks<br><br>John E<br></div></div><br>
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