constrain ground object

[pseudo messiah]

This is probably really simple but I cant seem to get it to work.

How can I constrain an object at ground level to follow another object above it but not rise and fall with the higher object?

In other words I have a box up in the air that moves on all axis while the ground object below follows but is restricted to just two axis (in this case x and z ) Im trying to do this in 3dsmax 7.

[ross_coe]

you'll be glad to hear that it's quite a quick and simple process

1. select the box in the air. right-click and select "wire-parameters" from the menu that pops up. then select "transform---->position---->x position"
2. a line appear coming from the box, so next you need to click on the ground object. from the menu that pops up, again select "transform---->position---->x position".
3. once this is done, the "parameter wiring" box appears. you simple click the arrow pointing to the right (in the middle of the 2 windows) which then turns yellow, and then hit "connect". close the parameter wiring box.
4. now when you move the box, the ground object should move with it in the x-axis (but not the y or z axis).
5. repeat this for any other axis you want.....making sure you wire the y position of the box to the y position of the ground object, or the z position to the z position (which ever axis you choose).

hope this helps :)
you can also wire rotation to position and vice versa (should the need ever arise) and even wire things like the radius of a sphere to the position or rotation of another object.

[pseudo messiah]

Perfect. So simple. Thank you very much.