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Tue Nov 5 09:07:12 EST 2013

irst points still not displayed.

Explaining this visualization issue is pretty difficult, so I attached 4 re=
ndering with different opacity :
30% : http://hpics.li/e62fe11
60% : http://hpics.li/2907cb2
99% : http://hpics.li/6aaa433
100% : http://hpics.li/b94c61a

Thank you,
Alex.

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<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">Hi everybody,<br>
<br>
I am currently manipulating surfaces and i want to modify their opacity.<br=
>
<br>
I used vtkActor::GetProperty and vtkProperty::SetOpacity.<br>
I already made sure the value given to this last function was a double betw=
een 0.00 and 1.00.<br>
After setting the opacity I just render the vtkRenderWindow related.<br>
<br>
<b>From 100% to 99%, a weird rendering occurs</b> : a big part of the point=
s are not displayed anymore, and we can only see the points behind them.
<i>(reminds me of a ray tracing issue, where the intersection between the r=
ay and the object returned is not the closest one of the camera but the sec=
ond one.)</i><br>
<br>
<b>From 99% to 0%, the opacity modification looks perfectly fine</b>, with =
those first points still not displayed.<br>
<br>
Explaining this visualization issue is pretty difficult, so I attached 4 re=
ndering with different opacity :<br>
30% : <a href=3D"http://hpics.li/e62fe11" target=3D"_blank">http://hpics.li=
/e62fe11</a><br>
60% : <a href=3D"http://hpics.li/2907cb2" target=3D"_blank">http://hpics.li=
/2907cb2</a><br>
99% : <a href=3D"http://hpics.li/6aaa433" target=3D"_blank">http://hpics.li=
/6aaa433</a><br>
100% : <a href=3D"http://hpics.li/b94c61a" target=3D"_blank">http://hpics.l=
i/b94c61a</a><br>
<br>
Thank you,<br>
Alex.<br>
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