MPR question

Mark Davey (mkd@medphys.ucl.ac.uk)
Tue, 15 Jun 1999 14:25:13 -0700

• Next message: Clara Chan: "lines in image"
• Previous message: Robert Grzeszczuk: "Re: volumizer-performer difficulties"
• Next in thread: Robert Grzeszczuk: "Re: MPR question"
• Maybe reply: Robert Grzeszczuk: "Re: MPR question"

I have taken the first Multi Planar Reformatting demo that comes with
Volumizer (using voglMPR1.cxx) and tried to adapt it so that the user
can view different slices by changing the value of 'pos' in the line

planeEquation = aSamplingPlaneSet->generateEquation(pos);

where pos ranges from 0.0 to 1.0. This seems to work find when the
command line says to use 3D interpolation (i.e -3D) but when -2D is used
there seems to be a problem. If the volume is aligned with the viewing
port then as 'pos' is slowly varied it is seen that there is not actual
interpolation between slices only a darkening of the current slice until
at a discrete point the next slice is displayed.

I have to say that this only happens when the dataset is aligned with
the viewport.

Can anyone help me to understand what is going on here.
Im using an Onyx2 which does have 3D texture memory, so I could get
around this problem, but I want to make my code as machine independent
as I can..

Regards,
Mark..

--
From: Mark Davey
Dept. of Medical Physics, UCL.
TEL: +44 (0)171 915 1673.
FAX: +44 (0)171 837 9279.
Institute of Laryngology and Otology,
330 Gray's Inn Road,
London.
WC1X 8GE.

  ------------------------------------------------------------------------

• Next message: Clara Chan: "lines in image"
• Previous message: Robert Grzeszczuk: "Re: volumizer-performer difficulties"
• Next in thread: Robert Grzeszczuk: "Re: MPR question"
• Maybe reply: Robert Grzeszczuk: "Re: MPR question"

This archive was generated by hypermail 2.0b2 on Mon Nov 01 1999 - 14:02:51 PST