tensor and qball glyphs are not shown in the middle of the voxels

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What steps will reproduce the problem?
1. load raw dMRI data ( e.g. with 1.9 mm voxel size : main:/tmp/diff_raw )
2. compute tensors
3. tensors are not shown in the middle of the voxel (see picture attached)

additional:
4. compute qballs
5. qballs are not shown in the miggle of the voxel
6. move slice, the qballs move within the same voxel. this is wrong. they must 
stay on the same place

What version of the product are you using? On what operating system?

brainGL development version "1453:84c155a27ef4" Sep 26 2014 12:39:27

Original issue reported on code.google.com by [email protected] on 26 Sep 2014 at 2:26

Attachments:

• [Screenshot - 09262014 - 04:19:40 PM.png](https://storage.googleapis.com/google-code-attachments/braingl/issue-66/comment-0/Screenshot - 09262014 - 04:19:40 PM.png)