[ODE] QNAN in Body position! May be LCP problem? Need Help!!!

[Andrey Tyagunoff]

Situation changed!
 I have test ONLY 2 bodyes with 2 binded geomsSphere.

dWorld settings:
dReal = double 	CFM = 1e-10 	ERP = 0.2 	gravity = (0, 0, -9.8)

Bodyes have mass initial position gravitation etc.
First case:
Bodyes linked by joint Hinge2. -> have a QNAN in positions  on 2 sec of
game cycle.
Second case:
Bodyes NOT linked by joint Hinge2. -> have a normal  game cycle.

How I linking the bodyes:
  m_hJoint = dJointCreateHinge2(getWorld(), 0);
  dJointAttach(m_hJoint, hBody1, hBody2);

  const dReal* const wPos = dBodyGetPosition(hBody1);
  dJointSetHinge2Anchor(m_hJoint, wPos[0], wPos[1], wPos[2]);
  dJointSetHinge2Axis1(m_hJoint, 0, 0, 1);
  dJointSetHinge2Axis2(m_hJoint, 1, 0, 0);

  dJointSetHinge2Param(m_hJoint, dParamLoStop, 0);
  dJointSetHinge2Param(m_hJoint, dParamHiStop, 0);
  dJointSetHinge2Param(m_hJoint, dParamFMax, 50);
  dJointSetHinge2Param(m_hJoint, dParamVel, 0);
  dJointSetHinge2Param(m_hJoint, dParamVel2, 0);
  dJointSetHinge2Param(m_hJoint, dParamFMax2, 80);

  dJointSetHinge2Param(m_hJoint, dParamSuspensionERP, 0.25);
  dJointSetHinge2Param(m_hJoint, dParamSuspensionCFM, 0.005);

	
And WHAT'S WRONG????

-----Original Message-----
From: ode-admin@q12.org [mailto:ode-admin@q12.org] On Behalf Of Andrey
Tyagunoff
Sent: Saturday, June 21, 2003 4:30 PM
To: ode@q12.org
Subject: RE: [ODE] QNAN in Body position! May be LCP problem? Need
Help!!!


All wheels in car have mass. And after star car succesful landing to
heighmap. But wheels of car small shaking on land.

-----Original Message-----
From: DjArcas [mailto:djarcas@hotmail.com] 
Sent: Saturday, June 21, 2003 4:27 PM
To: Andrey Tyagunoff; ode@q12.org
Subject: Re: [ODE] QNAN in Body position! May be LCP problem? Need
Help!!!


QNANS can be caused by not giving an object mass, or by giving it a mass
of
zero.

----- Original Message ----- 
From: "Andrey Tyagunoff" <moonrat@nikita.ru>
To: <ode@q12.org>
Sent: Saturday, June 21, 2003 1:04 PM
Subject: [ODE] QNAN in Body position! May be LCP problem? Need Help!!!


> I create four wheels car with Hinge2 joints.
> And I have heightmap custom geom for land.
> After start the aplication all looks good, but some times my car
> disappear. In this case dGetBodyPosition() return me QNANs!
>
> If i set #define DEBUG_LCP I have message
> "L*D*L' check, maximum difference = 4.7683716e-007"
> If I trying use double in my config settings I have this message too.
> What's wrong???
>
>
>
> _______________________________________________
> ODE mailing list
> ODE@q12.org
> http://q12.org/mailman/listinfo/ode
>

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