Hi ARToolkit users,
 
I have ported a 3D Studio Max model into C code and I am trying to register it in a pattern I have created using the mk_patt sample code. My problem is that the virtual object is partially registered in the square. Depending on the angle I see the object it changes possition in the pattern instead of staying perfectly alligned with it. What do you thing causes this problem? Isn't it straightforward to port models into the scene and perform registration? 
 
Thanks.
 
Best Regards 
Fotis Liarokapis
 
__________________________________
Fotis Liarokapis - Research Student
Centre for VLSI and Computer Graphics,
School of Engineering and Information Technology, 
University of Sussex, Stage II, Room 4B4.
Brighton, Falmer, BN1 9QT.
Personal Site: http://www.sussex.ac.uk/Users/tapi8
Work Site : http://www.sussex.ac.uk/eit/
e-mail: fliarokapis@h ..........
tel:  +44 (0)1273 606755 ext 2622
fax: +44 (0)1273 690816

Hi,

>My problem is that the virtual object is partially registered in the square. 
>Depending on the angle I see the object it changes possition in the pattern 
>instead of staying perfectly alligned with it. What do you thing causes this 
>problem? 

I am not sure, but it sometimes happens when virtual objects are drawn
at wrong position in marker coordinates. Marker coordinates locates on the
marker and the origin is just on the marker. So negative values in Z-axis 
should not be used for virtual objects. Because it means that the virtual 
objects are under the marker. In this case, we can see the virtual objects
as if it moves around the marker.
If you want to put the virtual objects on the marker, minimum value in Z-axis
of the virtual objects should be zero.

-- 
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  Hirokazu Kato
  Faculty of Information Sciences
  Hiroshima City University               Phone: 082-830-1705
  Email: kato@s ........................     Fax: 082-830-1435
  URL: http://www.sys.im.hiroshima-cu.ac.jp/people/kato/