High mass ratios, was [ODE] Choleski factorization

Billy Zelsnack billy_zelsnack at yahoo.com
Tue Mar 25 20:22:01 2003


This is a multi-part message in MIME format.

------=_NextPart_000_0009_01C2F314.954AFBD0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable


>david@csworkbench.com said:
> I'm also almost positive that going to single constraints will make =
the system even
> more sensitive to high mass ratios, forces, and velocities.

Be careful when testing this. I have found that using random masses in =
stacks (with randomly large ratios between blocks) is a much easier to =
solve problem than interlacing high and low mass blocks in a stack.

-billy



------=_NextPart_000_0009_01C2F314.954AFBD0
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2722.900" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>&gt;david@csworkbench.com =
said:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>&gt;&nbsp;I'm also almost positive that =
going to=20
single constraints will make the system even<BR>&gt; more sensitive to =
high mass=20
ratios, forces, and velocities.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Be careful when testing this. I have =
found that=20
using random masses in stacks (with randomly large ratios between =
blocks) is a=20
much easier to solve problem than interlacing high and low mass blocks =
in a=20
stack.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>-billy</DIV>
<DIV><BR></DIV></FONT></BODY></HTML>

------=_NextPart_000_0009_01C2F314.954AFBD0--