[ODE] Geist3D, ODE and Open-source

[jstier@cs.uvic.ca]

Yes, so far it only runs on windows. I have used the windows template library to
build the GUI and should have probably started with QT. One day, I will port
it, but it will take some time.

Jochen

> 
> It's windows only software?
> 
> 
> Saturday 08 April 2006 05:48、jstier at cs.uvic.ca さんは書きました:>
> Hi Everyone,>> For the past five years I have been developing a virtual
> reality authoring> tool and engine (www.geist3d.org) as part of my research.
> I have also used> to ODE since 2002. Just recently I have first released
> Geist3D in a> news-feed at opengl.org. I was surprised by the traffic this
> has produced.> The internet is bigger than I thought. In this light I have
> decided to> Open-source Geist3D as well. Now I have two problems; how to
> properly> integrate ODE and under what license to release it.>> Since I have
> implemented my own scene graph there is a lot of overlapping> data. For each
> data member in the ODE engine there exists the same member> in my own scene
> tree nodes. The problem is that I also have Python bindings> and Python
> requires that you pass to the interpreter a struct containing> the members in
> order to ensure fast access. In ODE all of the members are> hidden and they
> cannot be presented in the way that python expects them.> So, I am
> considering to remove the outer layer of ODE and replace/merge the> structs
> i.e. dxBody, dxJoint with my own node types. This way, they will> only have
> one memory address, ensuring good performance and consistency.> There is a
> similar problem with the bounding boxes, because they are> important for
> occlusion culling which, as far as I know, ODE does not do.> Now, how can I
> combine ODE and Geist3D so that any further development> benefits both sides.
> Not to mention all of the discussions about Bullet and> GJK... If I do this,
> how much support can I expect from the ODE community> and how can we combine
> our efforts.>> The other question I have is what open source license to use.
> I know that> ODE is LGPL, i.e. do what you want! Geist3D, however is an
> authoring tool> with a GUI and a runtime engine. Does this license make sense
> here ? What> are the implications and what does it mean.>> Anyways, if you
> have some time and a good graphics card have a look at> Geist3D. It was
> intended as a mechatronics simulation tool. Basically you> have a virtual
> environment which reflects the effect of mechanical> actuators -- obviously
> by leveraging ODE to a large extent. Using the> sensor telemetry from the
> environment you can then develop a control system> using Petri Nets and
> Python, which in turn changes the virtual environment.> Basically, the
> simulation models the same feedback loop that you will find> with between a
> real mechatronic system and its environment... at least to> some extent.>>
> The installation of Geist3D includes a bunch of interesting models. When> you
> go to the website you will find Geist3D and Geist3D-programmable under> the
> download section. The former is more intended to show that GLSL shading>
> language features, but there is a ragdoll demo, a domino and a box stack.>
> The latter contains the really interesting stuff as far as rigid body>
> dynamics goes. There is a small factory and a landscape with autonomous,>
> four wheeled, vehicles.>> Cheers> Jochen>>> P.S. I have already outstripped
> my bandwidth with the ISP. Their billing> system is down and I cannot
> purchase any more. But they guaranteed that the> site will remain up an
> running. If you cannot get to www.geist3d.org let me> know and I will repost
> this message again :)>> P.S.S. The code is not there yet. I just yesterday
> decided to open-source> and there is soooo much cleanup to do!>>>
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