[vtkusers] Picking a point
brownr at ucalgary.ca
Thu Apr 24 20:03:15 EDT 2003
I've got a cube and I want to pick a point on it's surface.
vtkPointPicker is kind of slow and when I use
vtkPointPicker.GetMapperPosition() it returns the wrong position (I
create a sphere centered on the coordinates and it is not under the
vtkPropPicker is a much nicer option -- very fast, and allows you to
give it a subset of the props to pick. However,
vtkPropPicker.GetPickPosition() does not appear to return world
coordinates. To me, these look like view coordinates. I tried
multiplying by the camera's ViewTransformMatrix, but this doesn't
produce good results. I also asked the renderer to convert from view
to world coordinates and this produced completely nonsensical numbers.
How can I do this?
Seaman Family MR Center
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