[Mrtrix-discussion] error displaying tracks with MRview

[Donald Tournier]

Hi,

Ben is correct, the OpenGL support in a VM is rarely sufficient to run all
the features of MRView. The OpenGL renderer in these VMs is typically the
default Microsoft software renderer, which is a basic OpenGL 1.1
implementation. Some of the features in MRView require OpenGL 1.2, which is
most likely the reason for the crash.

Generally, I don't recommend running the MRtrix GUI components within a VM
for this reason. Moreover, future versions will rely on OpenGL 2.0 (if not
3.0), so this problem is only going to get worse...

Cheers,

Donald.


On 8 October 2010 21:46, Jeurissen Ben <Ben.Jeurissen at ua.ac.be> wrote:

>  I have never run the windows version of mrtrix in a virtual machine. I am
> guessing your problem could have something to do with lacking/incomplete
> opengl support of the video driver used inside your virtual machine.
>
>
>
> What virtual machine are you using? Did you enable 3D acceleration in the
> VM settings? Did you install additional VM video drivers inside your VM?
>
>
>
> Could you start ‘mrview’ and then select “Help” and “OpenGL info” and
> report the output here?
>
>
>
> Cheers,
>
> Ben
>
>
>
>
>
> *From:* mrtrix-discussion-bounces at public.nitrc.org [mailto:
> mrtrix-discussion-bounces at public.nitrc.org] *On Behalf Of *Keith Hulsey
> *Sent:* donderdag 7 oktober 2010 22:50
> *To:* mrtrix-discussion at www.nitrc.org
> *Subject:* [Mrtrix-discussion] error displaying tracks with MRview
>
>
>
> I installed MRtrix v0.2.9 on my virtual machine that uses Windows XP. When
> I try to overlay an image with tracks generated using streamtrack an error
> occurs which closes MRview.
>
> I generated the spherical harmonic representation of the DWI using dwi2SH.
> The original images had 50 directions with b 1000 and 6 b 0 images. Two sets
> of these made 112 original images per subject.
>
> The command I used for generating the tracts was:
> streamtrack -seed WM_mask.nii -mask brain_mask.nii SD_PROB dwi_image.nii
> tracks.tck
> I pasted the output from track_info below.
>
> I want to try TDI using these images.
>
> Thanks, Keith
>
>
> Microsoft Windows XP [Version 5.1.2600]
>
> Y:\MRtrix>track_info -info tracks.tck
> track_info [INFO]: WARNING: malformed key/value entry ("max_num_attempts:")
> in f
> ile "tracks.tck" - ignored
> track_info [INFO]: error parsing spherical ROI specification
> "Y:\MRtrix\WM_mask.
> nii" - assuming mask image
> track_info [INFO]: error parsing spherical ROI specification
> "Y:\MRtrix\dti2cEC_
> brain_mask.nii" - assuming mask image
> ***********************************
>   Tracks file: "tracks.tck"
>     count:                10000
>     init_threshold:       0.2
>     lmax:                 12
>     max_dist:             200
>     max_num_tracks:       10000
>     max_trials:           50
>     method:               SD_PROB
>     min_curv:             1
>     min_dist:             10
>     no_mask_interp:       0
>     sh_precomputed:       1
>     source:               Y:\MRtrix\SH.nii
>     step_size:            0.2
>     stop_when_included:   0
>     threshold:            0.1
>     total_count:          11067
>     unidirectional:       0
>     ROI:                  seed Y:\MRtrix\WM_mask.nii
>     ROI:                  mask Y:\MRtrix\dti2cEC_brain_mask.nii
>
>
>  ------------------------------
>
>
> UT Southwestern Medical Center
> The future of medicine, today.
>
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>
>


-- 
Jacques-Donald Tournier (PhD)
Brain Research Institute, Melbourne, Australia
Tel: +61 (0)3 9496 4078
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