 | | | Re: Need Help with Physics Engine Animations... | Re: Need Help with Physics Engine Animations... 2004-01-22 - By ccoles_avengers
Back
Hi Andrew,
Actually, you should be able to change lights, cameras, and textures
(as well as any other non-physics involved objects/features) with the
Physics Engine (PE) turned OFF and not have any problems
playing/reviewing your animation.
Actually, I find that once I run the PE ONCE, I turn it OFF and make
all my non-PE changes. I even RENDER with it OFF and it seems as
though there is no difference in the animation. It also seems that it
shaves off some computing time from the rendering with it turned OFF
than with it turned ON. So right now, (after all the helpful tips
I've gained from the list) I now approach my PE animation with
setting up the PE objects first and getting the desired affect that I
want. Then I turn OFF the PE and go for camera moves, lighting
changes, shader modifications, etc. Then I go for a final render.
This approach is definitely saving a whole lot of time for me.
Take care.
Claudia
"Selocic"
(a newbie)
--- In Carrara@(protected), Andrew Turner <turner410@(protected)> wrote:
> What would be REALLY nice would be if the physics calculation could
be done
> once - and only once - so long as no other thing that affected the
physics
> routine changed... seems a tad silly to have to recalculate physics
because
> the .camera. moves..
>
> This way, too, we could jump to a point anywhere in the animation
without
> having to wait.
>
> And better yet, change textures and lighting... hm...
>
> From: "Matthew Schultz" <matt@(protected)>
> Reply-To: Carrara@(protected)
> Date: Wed, 21 Jan 2004 15:27:08 -0800
> To: <Carrara@(protected)>
> Subject: Re: [Carrara] Re: Need Help with Physics Engine Animations...
>
>
> You could but I actually think that may end up being more
cumbersome. With
> the modified cubes you would be stuck with the physics movement from
that
> point forward. If you wanted to change an aspect of the movement you
would
> need to perform heavy calculations.
>
> If you use the method I suggested you can always modify the simple
objects
> placement and make much quicker changes in the physics. In the end
it will
> take a little longer to set up but it will save allot of time when
you are
> actually working on the file and rendering it (remember physics has to
> recompute during rendering in most cases).
>
> Matt
>
> -- -- Original Message -- --
> From: David Bell
> To: Carrara@(protected)
> Sent: Tuesday, January 20, 2004 2:48 PM
> Subject: Re: [Carrara] Re: Need Help with Physics Engine Animations...
>
>
> Matt,
>
> If you cloned all the dominoes from the same master vertex cube,
could you
> go into the vertex editor later and replace the simple cube with a more
> detailed one thus replacing them all in one blow? (And if the
textures were
> different that should work out too ... wish I had the time to try this.
>
> Just a thought.
>
> Yours,
> David
> __ ____ ____
>
> Nordwind53@(protected)
> David E. Bell
> __ ____ ____
>
> -- -- Original Message -- --
> From: Matthew Schultz
> To: Carrara@(protected)
> Sent: Tuesday, January 20, 2004 5:55 PM
> Subject: Re: [Carrara] Re: Need Help with Physics Engine
Animations...
>
>
> You can do this. Simply create your simplified objects and have your
> complex versions track the movement of the simple versions. To do this
> simply
>
> Create primitive cubes to represent the dominoes and apply
physics to the
> cubes.
> Compete the entire scene physics making your adjustments until
you get
> your desired effects.
> Now uncheck "enable physics" in the scene, this make it so
physics won't
> recomputed.
> Now use the track modifier on the high resolution dominoes to
track the
> movement of the low res dominoes.
> Uncheck "visible" for the reference (low-res) dominoes.
> Now it will appear that the physics are effecting the high res
dominoes.
> This way you will save a large amount of time computing physics.
>
> Matt, Eovia Tech Support
>
> -- -- Original Message -- --
> From: pmiinalainen
> To: Carrara@(protected)
> Sent: Monday, January 19, 2004 11:37 PM
> Subject: [Carrara] Re: Need Help with Physics Engine Animations...
>
>
> couple of notes about physics. They seem to calculate faster on
> basic primitives, i.e. spheres, cubes etc. No matter if you have
> scaled them. If you do your domino test with realistic blocks with
> rounded edges, it will be slower. It sometimes seems that vertex
> models require more accurate and slower calculation in order to
> behave realistically.
>
> I think it would be great if you could do animation with reference
> objects and then substitute them for high-resolution versions for
> rendering. I really hope we'll see that feature in the future.
>
> petteri
>
> --- In Carrara@(protected), "darylcrandall2002" <Daryl@(protected)>
> wrote:
> > If you look back through this forum's archives you'll see lots of
> > discussion about animations, some of them less than flattering.
> >
> > I've been able to make physics behave most of the time but watch
> out
> > for what I call the "ghosting effect". Some objects that are in
> > contact with each other at the beginning of time are not treated
> > properly.
> >
> > If one is static (the floor) and the other dynamic (a domino) the
> > domino might just fall through the floor (even with the floor
> > defined as a plane or even another cube such as another
domino!!!)
> >
> > I've even had two dynamic dominoes fall through each other. Being
> in
> > contact seems to be the killer though. Separate the object by a
> > teeny bit and things are "usually" OK again. (shouldn't have
to do
> > that though. Grrr...) I'm talking about Carrara 2, but from what
> > I've seen on this list, not much in this function area has
changed
> > with Carrara 3.
> >
> > The other thing about Carrara physics is the god awful length of
> > time it takes to do calculations for even simple operations.
> > Although it "usually" works out in the end if you have a movie to
> > watch or a book to write while you're waiting. However it does
> seem
> > to work.
> >
> > I once made a five link chain, secured both ends with the chain
> not
> > taut and started the clock. The final animation is very
> realistic,
> > the middle of the chain drops and bounces around waggling
back and
> > forth just like you'd expect it too but it took 3 hours for a 6
> > second movie. It's a very complex calculation but I'm dying to
> try
> > it on my copy of Maya5 PLE (Personal Learning Edition) (free with
> > November's "Digit" magazine).
> >
> > The FIRST thing I did with Maya5 PLE was the domino test. I made
> a
> > pyramid of 9 dominoes and animated it falling when a ball hit it.
> > Maya practically calculated the thing in real time! Try that in
> > Carrara and you can make dinner while you're waiting.
> >
> > Point being, that yes, physics does work in Carrara but it could
> be
> > MUCH better.
> >
> > Daryl
> >
> >
> >
> >
> > --- In Carrara@(protected), "ccoles_avengers"
> > <ccoles_shado@(protected)> wrote:
> > > Hi Charles,
> > >
> > > Wow, didn't realize the restrictions re: the infinite plane.
> > Thanks
> > > for the guidance. Also, thank you for the tip on where the
> physics
> > > engine on/off switch is located. I usually access "Scene" only
> to
> > > make sure that my rotations are correct (i.e. to say - when
I am
> > doing
> > > scene rotations), so I can see where I missed seeing it.
> > >
> > > Thanks again for your speedy reply. :)
> > >
> > > "Selocic"
> > >
> > > --- In Carrara@(protected), "Charles Brissart"
> <charles@(protected)>
> > wrote:
> > > > Hi,
> > > >
> > > > first, don't use an infinite plane with physics. The physics
> > engine
> > > does not
> > > > support the infinite planes. Use the plane instead.
> > > >
> > > > To turn off the physics calculation, select the scene and in
> the
> > scene
> > > > properties you will see the check box at the bottom ( you
> might
> > need to
> > > > scroll down).
> > > >
> > > > Charles
> > > >
> > > > -- -- Original Message -- --
> > > > From: "ccoles_avengers" <ccoles_shado@(protected)>
> > > > To: <Carrara@(protected)>
> > > > Sent: Sunday, January 18, 2004 2:17 PM
> > > > Subject: [Carrara] RE: Need Help with Physics Engine
> > Animations...
> > > >
> > > >
> > > > > Hi All,
> > > > >
> > > > > I am a newbie to Carrara Studio 3 (as well as 3D Gfx) and
> this
> > is my
> > > > > first post to the list so your patience is most
> > appreciated :) .
> > > > >
> > > > > I have been experimenting with the phyisics engine and have
> > been
> > > > > sucessful with animating some test files using this feature
> > but have
> > > > > been stumped by certain anomalies which crop up in other
> > files. For
> > > > > example, when trying to animate a domino chip, I can
> > successfully have
> > > > > the chip drop down from the sky and bounce on the ground
> using
> > a
> > > > > downward directional force as well as have the chip knocked
> > over
> > > > > successfully by a rolling sphere. However, when I create a
> > file that
> > > > > only contains the chips (three chips in total w/o the
> sphere),
> > I have
> > > > > noticed that the chips literally GO THROUGH the infinite
> > plane, as
> > > > > well as go into directions that I never expected. Also,
> they
> > don't
> > > > > bounce like in the file containing just the single domino
> > chip. They
> > > > > go into weird positions and then drift either backwards or
> down
> > > > > through the infinite plane.
> > > > >
> > > > > Could anyone help me with this? What I am trying to
> > eventually do is
> > > > > to make a few dominoes fall down but have definitely run
> into
> > snags
> > > > > such as what I have described.
> > > > >
> > > > > Any advice or links pointing towards more CS3 online
physics
> > tutorials
> > > > > would be much appreciated.
> > > > >
> > > > > Also, I read that the physics engine can be turned "off"
> when
> > making
> > > > > modifications to objects, etc. For some reason I can not
> find
> > that
> > > > > particular feature and the only way I have been turning the
> > physics
> > > > > engine "off" is by switching to a different type of motion
> for
> > each
> > > > > object when making changes. Somehow, this doesn't seem
> > right. Right
> > > > > now, unless there are major changes, I don't change the
> motion
> > type
> > > > > and keep the physics engine active all the time. However,
> if
> > someone
> > > > > can share with me where in CS3 I can locate the "physics
> engine
> > > > > on/off" feature/setting, I'd be much obliged. :)
> > > > >
> > > > > Thank you for your help.
> > > > >
> > > > > "Selocic"
> > > > >
> > > > > PS - I currently only have web access to these messages so
> > please
> > > > > excuse any delay in my responses. Thank you.
> > > > >
> > > > >
> > > > > To unsubscribe send a message to
> > > > > Carrara-unsubscribe@(protected)
> > > > >
> > > > >
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>
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