On Wed, 17 Oct 2001 00:17:15 -0400, "Redbeard \(MDJohnson\)"
<red### [at] wvadelphianet> wrote:

>Here's what happens when you use nitroglycerin gels to experiment with :-)
>
>Actually, just got a parameter wrong in my simulation.

Yeah, I also got some of these while working on my project :)


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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"Peter Popov" <pet### [at] vipbg> wrote in message
news:dasrst8gmr83ih71i6upak3cb177hk0263@4ax.com...
> On Wed, 17 Oct 2001 00:17:15 -0400, "Redbeard \(MDJohnson\)"
> <red### [at] wvadelphianet> wrote:
>
> >Here's what happens when you use nitroglycerin gels to experiment with
:-)
> >
> >Actually, just got a parameter wrong in my simulation.
>
> Yeah, I also got some of these while working on my project :)

Peter,

    I was just wondering when we will get to see the results of your work
being available for POV-Ray. I'm eager to get animating.... ;-)

All the best,

Andy Cocker

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On Wed, 17 Oct 2001 23:59:36 +0100, "Andy Cocker"
<big### [at] mariner9fsnetcouk> wrote:

>    I was just wondering when we will get to see the results of your work
>being available for POV-Ray. I'm eager to get animating.... ;-)

I still have a lot of things to fix. 

First of all, I am using regular hexahedron finite elements (cubes :))
and this makes meshing, well, a bit tricky. I want to use irregular
tetrahedrons but I have trouble developing a meshing algorithm.

Also, it turns out that forward Euler integration is very unstable. I
have to read into central differences, Adams and Runge-Kutta
integration methods and choose the one that fits best (fast enough,
and understandable by me).

I have yet to test the collision routine that I made up as it only
looks theoretically correct.

I guess the point-could shape representation that I am using now is
not very suitable for raytracing so I'll have to do some reading into
NURBS and DNURBS and/or try to dig my way though POV's mesh code, in
which case I will have to go through OpenGL and X programming, which
is a nightmare in its own right.

All this requires a lot of time to read, and access to materials which
are, for the moment, beyond my reach. I have a list of about 40 ASME
or SIGGRAPH publications I want to get my hands on. and that list
doesn't even cover the aforementioned items.

I am thinking of publishing the code. I have a CVS server running at
home but I have to talk my brother into changing the paranoid firewall
settings he's put up. Plus, the code is a mess I'm ashamed of :(

To answer your question briefly -- sadly, it won't be soon.


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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"Peter Popov" <pet### [at] vipbg> wrote in message
news:nkb5ttoptllpg6dkkbp20q7si75npati08@4ax.com...
>
> To answer your question briefly -- sadly, it won't be soon.

I'm sorry to hear that. Thanks for your reply.

All the best,

Andy Cocker

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"Peter Popov" <pet### [at] vipbg> wrote in message
news:nkb5ttoptllpg6dkkbp20q7si75npati08@4ax.com...
> On Wed, 17 Oct 2001 23:59:36 +0100, "Andy Cocker"
> <big### [at] mariner9fsnetcouk> wrote:
>
> >    I was just wondering when we will get to see the results of your work
> >being available for POV-Ray. I'm eager to get animating.... ;-)
>
> I still have a lot of things to fix.
>
> First of all, I am using regular hexahedron finite elements (cubes :))
> and this makes meshing, well, a bit tricky. I want to use irregular
> tetrahedrons but I have trouble developing a meshing algorithm.
>

Hmmm... I have some ideas for rendering this... My simulation uses a grid of
points that I'm giong to convert into irregular tatrahedrons.  I've got some
mesh ideas and some solid modeling ideas (which I would prefer - since it can be
used for CSG)  When I get them worked out I'll post an anim and the code for the
render part.

Michael

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