[ODE] Complex Body Creation

[achaudhry]

Thanks for your reply, 
It was really helpfull. I am nw able to create my composite body, comprising
of various boxes. the problem is that somehow this body is not participating
in simulation.

 Even after positioning the body in mid air, above ground plane, gravit forces
are not acting on it. I have checked gravoty, and its ON. 

Also on applying force etc to this body doesnt cause any change to it. 

I am not sure if i am doing everything correctly or not. 
Used the help from wiki . 

Any help would be gr8. 
thanks, 
amber

From: Bram Stolk <bram at sara.nl>
To: achaudhry <achaudhry at ariworld.com>
Cc: ode at q12.org
Sent: Thu, 10 Aug 2006 11:50:04 +0200
Subject: Re: [ODE] Complex Body Creation

achaudhry wrote:
> hi, 
> I am trying to create a single object which comprises of 4 boxes attached in a
> fixed manner. 
> to create this complex object, i am currently creating seperate boxes and then
> attaching them using Fixed joints. Is there any other method of creating this
> complex object? 
> 
> Also after creation, for changing the orientation etc of the complez ogject, i
> have to currently change orientation for all individual boxes, is there a way
> to group these boxes together as one single object and then perform operations
> on them as a single entity? 

yes... look at ode/test/test_boxstack.cpp

What you need to do, is attach multiple geoms to a single body.
Each geom is transformed by a transformgeom.

So to make a you object, you would create:

- 1 body
- 4 box geoms
- 4 trf geoms

This is much better than fixed joints, computes much faster,
less instability, more conventient to code, etc.

    Bram

> 
> Regards, 
> Amber
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-- 
Bram Stolk, VR Engineer SARA, Amsterdam.   tel +31 20 592 3000

"Windows is a 32-bit extension to a 16-bit graphical shell for an 8-bit 
 operating system originally coded for a 4-bit microprocessor by a 2-bit 
 company that can't stand 1 bit of competition."
------- End of Forwarded Message -------


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Amber Chaudhry
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