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<body>hi,<BR>
when I compiled an example of vtkImageShiftScale , I found a small problem . the example is ImageInteractor .and my problem is : at first time , I can draw a rectangle on a CT picture with mouse , and when I press the mouse left button again ,a rectangle could be drawn again but the CT picture disappear . and I have make the picture to be visibility when I press the left mouse button : <BR>
pictureActor->VisibilityOn();<BR>
and when I release the left mouse button I set it to be invisibility :<BR>
pictureActor->VisibilityOff();<BR>
but unfortunately , I could not see the CT picture after I draw a rectangle . So what is wrong with my program ? and how should I do to work out it ? thank you ! <BR><br /><hr />探索 Windows Vista 的世界 <a href='http://search.live.com/results.aspx?q=windows+vista&mkt=zh-cn&FORM=LIVSOP' target='_new'>了解更多信息！</a></body>
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