Spinning atom electrons 2004-02-11 - By Harvey White
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On Wed, 11 Feb 2004 17:57:17 -0000, you wrote:
>Hi I'm trying to make a simple atom with 3 electrons spinning around it, ike
in a 1950's
>sci-fi movie kind of way.
>
>I'm a bit stumped with the electron(s) motion. I've tried a couple of things
but maybe
>there's a better way?:
>
>
>1. Made a large sphere primitive and applied the atomize modifier to it. This
works great
>except even at the lowest slider setting it makes many small spheres, when all
I want is 1
>(so I can make 3 rotate around the atom differently).
>
>2. I made a (small) sphere primitive rotate on a motion path. This works fine.
>
>BUT
>
>Is there any way I move and rotate the object AND the motion path. I can't
figure out how
>to select the motion path as a whole to transform it...
>
>If I can select it I can diplicate it (so I have 3) and rotate the duplicates
to other angles.
>
>OR
>
>Is there any way to change the angle of the working box so that I can draw
motion paths
>at angles other than the x-y-z axes? Then I could just redraw the motion paths
at the
>angles I want them to be... not a big deal to just draw 3 motion paths...
>
>Any examples would be most helpful. Please help! Thanks!
>Andrew
Let's see how I would try this.
first, create the nucleus.
secondly, create the electron, sphere. Place it in orbit around the
nucleus, move the hot point of the electron to the exact center of the
sphere. Apply rotate behavior.
repeat with other electrons. place in different orbits and incline
the orbit as needed (think this will work, never quite tried it).
if you want the electron to rotate visibly around its own axis.
try:
1) not moving the hot point of the electron, but applying the rotate
behavior to it. 2) create a group containing the electron only. Move
the group's hotpoint to the center of the nucleus and then apply a
rotate behavior.
you can also buy cogito from DGC, which will do this (and I'm told,
will animate ellipses as well).
You can have the nucleus rotate by creating it as a group of spheres,
then applying a rotate behavior to the group. This is independent of
the particles rotating around it.
Group the entire thing, then you can move it as an entity. Never try
to move it with the group expanded, since you will probably grab and
move an individual item in that group. Always move a group with the
group collapsed.
Harvey
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