Hi all
I still face some minor problems with regards to the jaw model. I am
doubtful about attaching an STL file to a segment/ node as I am unable
to determine the orientations and positions of the STL model with
respect to global origin. As a result, the STL files are positioned in
a random location. In my model, the muscle insertion and origin points
are specified properly but I am not able to position the STL file at
the correct location. I tried to use RotMat/ Axes0 routines but could
not do it accurately. Pl let me know if there is any standard
procedure of doing this and atleast for the model which I have
attached in the groups page (AnimalJawModel-1.rar folder,
JawModel2.any is the main file).
It seems from human jaw model of the repository, that it does not
require any other manipulation of STL files but still it is placed
properly at the correct location. So pl detail us about this.
The problem with the CAD file you are using is that the origin of its
coordinate system is far away and the orientation is not
corresponding to the orientation of the segments. We usually use CAD
files with the same coordinate system as the segment they are
attached to, so we can just attached directly the CAD file to the
segment without more manipulation as you saw it on the human jaw
model of the repository.
The best way to do so is to modify the STL file in order to match the
coordinate systems. Do you still have the file in STL format? The
ones included in the model you uploaded are Anysurf format. First you
have to define a reference point common on both the STL file and the
segment, it can be the origin of the segment or some bony landmark
like the neck joint or the top of the skull, any point that you can
locate with precision on both the STL file and the segment. This
point will be the origin of the STL file. Open the file with a CAD
software (rhinoceros for example) and move it to have the origin at
the chosen point and the orientation of the frame matching with the
one of the segment. Then you can create a node (if not existing
already) ate the location of the reference point on the segment and
insert the CAD file in this node, and the only thing left is to scale
properly the CAD file.
Best regards,
Sylvain, AnyBody Support.
— In anyscript@yahoogroups.com, “K Srikanth”
<srikanth_kannan84@…> wrote:
>
> Hi all
> I still face some minor problems with regards to the jaw model. I am
> doubtful about attaching an STL file to a segment/ node as I am
unable
> to determine the orientations and positions of the STL model with
> respect to global origin. As a result, the STL files are positioned
in
> a random location. In my model, the muscle insertion and origin
points
> are specified properly but I am not able to position the STL file at
> the correct location. I tried to use RotMat/ Axes0 routines but
could
> not do it accurately. Pl let me know if there is any standard
> procedure of doing this and atleast for the model which I have
> attached in the groups page (AnimalJawModel-1.rar folder,
> JawModel2.any is the main file).
> It seems from human jaw model of the repository, that it does not
> require any other manipulation of STL files but still it is placed
> properly at the correct location. So pl detail us about this.
>
> Thanks
> srikanth
>