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cdinic
01-31-2003, 03:18 AM
my contraption resembles a piston. Circular motion is converted into vertical motion. I am trying to set this up with out having to key frame anything so that I can sping the wheel at whatever speed I want.

I have attached a diagram.

Red circles are pivot points.

I tried placeing two dummies. One at the top of the spinning gray circle bound to that gray spinning circle. I then applied an atachment contraint to the green bar and chose this first dummy as the target.

Both the dummy and the gree bar spun around nicly. but the green bar needed to point at the blue.

Next I place a dummy at the base of the green bar and bound it to the green bar. I changed the link info so that it only folowed the vertical motion of the green bar.

Now I had a dummy that moved exactly as I needed it. if only I could get the green bar to look at it.

I then tried to apply a look at contraint to the green bar and choose the second verticly moving dummy as its target. (the dummy that was bound to itself) This was aparently not alowed because I was un able to choose the dummy.

ideas?

Thanks a million!
-Chris
arman
01-31-2003, 02:42 PM
OK, I have a guerilla way to solve this problem.

(all from top view) create a circle shape and place a dummy on it's right edge. then give a path constrait dummy to circular shape. now we got a circular loop motion. then create a main piston object(cylinder) under circle. (there must be a space between them) then link it to dummy. now, from hierarchy panel goto link info tab and unselect x and z move links. ( now cylinder link to dummy by one axis that we want) then move to top it's pivot point. now, we can create an energy transfer bar. create a cylinder from our dummy to our main piston ( u must rote it after creation). link it to dummy and give it a look at constrait to our main piston. ( I select z axis to look prorely but maybe u must select other axises) - PLAY animation

sorry for english :p
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