[PD] msd structures and force

[J bz]

Hi all,

I have created a 2d grid in msd and I have a question regarding the use of
force...

I'm going to have to mix my metaphors here I think:

Is it possible to send force so it acts almost like in layers so that, say,
I have my grid;
 ._._._.
|._._._.|
|._._._.|
|._._._.|

which is fixed.

I would then like to add a ball (for want of a better descriptor) which can
travel around the grid by being 'blown' by an overall x,y type force (which
I already know msd has/can do).  On top of this I would like the separate
masses and links to be capable of speeding up and slowing the 'ball' as it
travels around the space.

Pinball on train-tracks sort of thing (how's that for a simile:)

Is this even possible and if so how do I go about it?

Also, what's the best way of doing the grid?  At the moment I have one
version where all the masses are fixed and another where just the corners
are fixed.

Many thanks in advance,

Julian
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