CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

On Wednesday, January 6, 2021 7:28:10 PM CET Tony Apicella wrote:
> Questions about the geometry CGAL is using when making surface meshes.
> 
> I wanted the values of the mesh vertices to be based on the location of the
> gray scale voxels.
> 
> I have translated the gray scale image in space using the TX, TY, and TZ
> fields in the INR image format.
> 
> But the vertices of the mesh always have about the same locations as when
> the translations are zero.

That is strange. I see that the code of CGAL seems to deal with TX/TY/TZ 
correctly.

Can you please send a self-contained piece of CGAL that shows the issue, 
along 
with an example of an INR image? I would like to reproduce the issue.

Which version of CGAL do you use?

> Does CGAL expect that the center of the bounding sphere is the relative
> distance from the first row, column, and slice?

If everything works correctly, the TX/TY/TZ and the VX/VY/VZ describe how the 
voxels of the images are embedded in the 3D Euclidean space. The coordinates 
of the center and radius of the sphere are interpreted in the 3D Euclidean 
space as it should.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/