[ODE] An embarassingly basic geometry question

[Shamyl Zakariya]

Actually, that's the plan. I intend to have the two cylinders be 
representing a slider joint.
Right now, I've got a slider joint invisibly doing the work, and am 
simply testing my positioning code by drawing a cylinder between the 
ball joints the slider connects.

But yes, that's exactly the plan! Right now, my mechanical work is 
limited to standard servos (since I'm a robotics newbie), but since 
I've got good machine-shop access, and since I *love* machining work, I 
decided some time ago that when I get my current robot physically up 
and running, my next project will be a compressed-air powered spider, 
with pneumatic piston actuators. How cool would that be?

On Wednesday, June 11, 2003, at 01:35  PM, amundbørsand wrote:

>
> I've thought about cylinders myself (hydraulic in my case, but it's
> really the same thing). I thought something like this:
>
>  o------[XXXXXX]o
>
> Okay, what I was thinking was that I'll use a slider joint for the
> cylinder itself. The cylinder consists of two parts: The rod (---), and
> the cylinder ([XXX]). These will be ODE bodies, connected by the slider
> joint. Now, in the other end of both of these joints, I connect a ball
> joint (the o's), which I then can connect to whatever the cylinder is
> supposed to move.
>
> Your problem is really not a problem, you don't need it once the
> simulation starts, you just need to set up the parts initially, which
> you said your code already does correctly! (If I haven't misunderstood
> your question entirely)
>
> I think this should work perfectly, haven't tried it yet, but I'm
> looking forward to building everything from cars with hydraulic dampers
> to excavators!
>
>
> -- 
> amundbørsand <amund@c2i.net>
>
>
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>
Shamyl Zakariya
   "this is, after all, one of those movies where people spend a great
   deal of time looking at things and pointing."
	From a review of _Fantastic Voyage_