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This further demonstrates the problem I've been having with the
dominoes. Note that the sphere is moving fairly rapidly when it hits
the first domino, faster (I think) than the dominoes further down the
line that go through each other.
I've included the full scene this time, and hopefully it's close enough
to the minimal case. It should be fairly close in structure to the
tutorial code, as that was what I was working from.
Am I simply using too low a step_count? I increased it 10-fold from the
last animation posted, but then I have no real experience of what makes
good settings here.
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Attachments:
Download 'Dominoes2.m1v.mpg' (686 KB)
Download 'mechtest.pov.txt' (3 KB)
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Without reading the mechisms documentations I would say that the problems
lay where hte collsions are detected.
collision { 0,2
stiffness 20000
damping 5000
friction 0.8, 1.01}
Out of curiousity try messing around with the settings... eg...
collision { 0,2
stiffness 20000
damping 5000
friction 1.01, 1.01}
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"Andrew" <ast### [at] hotmail com> wrote in message
news:3e3dba83@news.povray.org...
> This further demonstrates the problem I've been having with the
> dominoes. Note that the sphere is moving fairly rapidly when it hits
> the first domino, faster (I think) than the dominoes further down the
> line that go through each other.
>
> I've included the full scene this time, and hopefully it's close enough
> to the minimal case. It should be fairly close in structure to the
> tutorial code, as that was what I was working from.
>
> Am I simply using too low a step_count? I increased it 10-fold from the
> last animation posted, but then I have no real experience of what makes
> good settings here.
>
I think the problem is with the collisions between masses and faces. I
increased the number of masses in the vertical direction and ran a simple
test. I also decreased the number of time steps by a factor of 10 for the
test and it seems to work just fine.
...
step_count 500
time_step (1/30)/500
...
group {MechSim_Generate_Box(<0,0,0>, 0.025, 100, 200000, 5000, true,
<0.5,1.0/9,0.1>, <2,10,2>, Move, 4)}
--- Troy
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Attachments:
Download 'mechtest.avi.dat' (168 KB)
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Andrew wrote:
>
> This further demonstrates the problem I've been having with the
> dominoes. Note that the sphere is moving fairly rapidly when it hits
> the first domino, faster (I think) than the dominoes further down the
> line that go through each other.
Like Troy mentioned using a more detailed topology for the dominos will
probably help. A brick with masses only at the corners will not behave
nicely during simulation.
It is usually a good idea to use the 'masses and connections' display
during tests so you can see the internal structure of the objects.
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 31 Dec. 2002 _____./\/^>_*_<^\/\.______
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