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Hello,
=20
I'm interested in aligning virtual geometry to a table, but allowing
panning over the whole surface. I'm experimenting using an array of
markers but am struggling to find the best system.
=20
At first I went for a simple option using 5 markers (arranged as on a
dice). The system would always try to use the central one for
alignment, but pick another if the central one wasn't detected (i.e. the
camera was pointed to an edge). However, this led to some wobbling, and
noticeable jumps whenever the central marker came into view (I'm pretty
certain the offset values were accurate).
=20
So after that I tried to do it properly, using a denser array and
averaging the transform matrices. However, this also causes significant
wobbling, especially as markers near the periphery of the camera appear
and disappear.
=20
I could code it to ignore markers away from the centre, but I could also
easily spend days trying different things. What experience have other
people had with marker arrays? Are there any solid algorithms that
work? I'm using version 2.70.
=20
Thanks
=20
Matthew
=20
=20
=20
--
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>I’m interested in aligning virtual geometry to a=
=20table,
but allowing panning over the whole surface. I’m experimentin=
g
using an array of markers but am struggling to find the best system.<o:p>=
</o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>At first I went for a simple option using 5 markers (a=
rranged
as on a dice). The system would always try to use the central one f=
or
alignment, but pick another if the central one wasn’t detected (i.e=
. the
camera was pointed to an edge). However, this led to some wobbling,=
=20and noticeable
jumps whenever the central marker came into view (I’m pretty certai=
n the
offset values were accurate).<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>So after that I tried to do it properly, using a dense=
r
array and averaging the transform matrices. However, this also caus=
es
significant wobbling, especially as markers near the periphery of the cam=
era
appear and disappear.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>I could code it to ignore markers away from the centre=
, but
I could also easily spend days trying different things. What experi=
ence
have other people had with marker arrays? Are there any solid algor=
ithms
that work? I’m using version 2.70.<o:p></o:p></span></font></=
p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>Thanks<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>Matthew<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size=
:10.0pt;
font-family:Arial'>--<o:p></o:p></span></font></p>
</div>
<FONT face=3DArial>This message is intended for the addressee(s) only and=
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sity=20
without the permission of the sender.<BR>It is your responsibility to ens=
ure=20
that this message and any attachments are scanned for viruses or other de=
fects.=20
Napier University does not accept liability for any loss<BR>or damage whi=
ch may=20
result from this email or any attachment, or for errors or omissions aris=
ing=20
after it was sent. Email is not a secure medium. Email entering the=20
<BR>University's system is subject to routine monitoring and filtering by=
=20the=20
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