<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1141" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>
<DIV>Hi, </DIV>
<DIV> </DIV>
<DIV>This is related with using vtkGlyph3D class.</DIV>
<DIV> </DIV>
<DIV>I am visualizing a vector field. I am using a vtkImageData dataset object
associating a vector with each point. The field ranges from (-2,-2,-2) to (2, 2,
2). I have setup the origin and spacing correctly and the vectors are computed
and stored correctly. The dataset goes as input into a vtkGlyph3D object.
However, when I map the glyph object to the vtkPolyDataMapper and I check its
bounds (GetBounds function), they come out like (-2, -2, -2) to something far
less than (2, 2, 2). The bounds for the vtkActor used to draw the glyphs is also
the same. As a result when I draw the actor it comes out very small (though it
draws all glyphs). I have checked this by drawing a cube wireframe of same
dimensions as dataset and the glyph object is just a small subset of the
box.</DIV>
<DIV> </DIV>
<DIV>Any idea why the bounds are not correct? (The bounds are the same whether
the scene has another object or not so I guess its not an issue with overlapping
datasets). Not sure though.</DIV>
<DIV> </DIV>
<DIV>Any suggestions are welcome. Thanks in advance.</DIV>
<DIV> </DIV>
<DIV>-Ather</DIV></FONT></DIV></BODY></HTML>