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Hi David,<BR><BR><BR>Thanks a lot for your reply.<BR><BR><BR>it works really good, the sphere it's clipped. (although if I try the opposite, clipping the box with the sphere doesn't work.. the box is not clipped)<BR>Unfortunately converting the cube in a implicit function is quite (really?) slow .. and I need it to be more or less fast.<BR><BR><BR>I'm doing the same but in ITK... So after voxelizing the sphere and can apply an AND filter between my 2 objects (i get the cells inside the sphere..) the only inconvenient is that<BR>I have to pass from the VTK coordinates to ITK ones.. and I have some inaccuracies...<BR><BR><BR>Thanks again,<BR>Steve<BR><BR><BR> <br /><hr />Hotmail : une messagerie fiable avec une protection anti-spam performante <a href='https://signup.live.com/signup.aspx?id=60969' target='_new'>Inscrivez-vous</a></body>
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