Or perhaps we are starting to overlap into what I'm hoping will be the next phase for XSI dynamics.
For managing all these relations, be they RBD, or particles, or whatever, we need a node graph kind of interface. It's the only way to manage these kinds of systems with any sense of sanity or visual clarity... the explorer heuristic with groups or PPG's alone is simply not enough to keep track of these relationships once they go beyond the simplest levels of complexity.
But I'm afraid it's going to have to be more than just me asking for this for Soft to take action in this department.
-Brad
> -------Original Message-------
> In that case, what would be good and simpler to implement/use might be
> different layered "world" of simulation, with their own transform and even
> volume deformations...
> You define the inside of the truck as a world, this world can inherit
> velocities or not, and can be moved wherever you want.
> And the outside of the truck can belong to another world, with a cat if
> you want to kill him again.
> Each world can only collide with the same world objects, but interfaces
> between worlds could also be defined.
> we could do a movie about that:-)
>
>
> On 04/11/05, BRAD <[LINK: mailto:brad(at)cg-soup.com] brad(at)cg-soup.com>
> wrote: How about a frame of reference situation?
>
> Children of a parent will be in the same frame of reference, so they
> inherit the intial velocities of their parents, plus their own initial
> velocity.
>
> In the case of the truck that starts from a rest, the child dominoes
> inherit an initial vel of 0, so they will fall as a result of their parent
> frame accelerating.
>
> The case of the truck already in motion would have the child dominoes
> inherit that same initial velocity, so they don't fall until the truck
> hits a bump. Perhaps the bump is the cat that tried to knock down the
> dominoes before. :-p
>
> -Brad
>
> > -------Original Message-------
> > hmmm, I am not sure I agree. What is happening in real life if the
> truck
> > has a constant speed?
> >
> > The dominos will stand straigth and move with the truck. When the
> dominos
> > eventually fall ( I forgot to tell you, there is cat running
> around...)
> > the dominos should not fall straight to the world floor, they have
> > momentum. Either you want to use this momentum in the sim (real life)
> or
> > you want to ignore the momentum but keep the parent motion of the
> truck,
> > I don't see why the dominos would ignore the truck motion when
> collisions
> > start.
> >
> >
> > Again I have no idea about how hard this is, therefore you maybe right
> > about ploting. I just hope there is a better solution, ploting 6
> curves
> > for a 1000 objects for a 1000 frames is not fun.
> >
> >
> > As for the solution (b). Why don't you set your passive objects to
> active
> > if you want them to behave like active objects. I may make a mistake
> here
> > but (a) seems more powerful because you can get true passive behavior
> in
> > a hierarchy.
> >
> >
> > syl
> >
> >
>
>
> --
> Aloys Baillet - XSI Technical Director
> Character Dpt - Animal Logic
> --
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