hi,
i got a problem with attaching an object correctly to a group of points in 3ds max.    i tracked a scene with a panning camera focusing on a moving car which drives around a corner. the points were correctly grouped and imported into max where i can see the moving points which resemble the car.
now i need to attach something ontop of the car. my problem is, that i just cannot figure out how to attach my object correctly to the GROUP of moving points so that it moves relative to the whole group. right now i only could successfully attach the object to a single point after ungrouping the points, but the result is not good, because the point only gives the correct position but not the correct rotation which results in my attached object not making the "turn" when the car drives around the corner it only follows its position. the correct rotation of the "car" is only in the complete group of moving objects.
so how can i attach something to the group of moving points so that my attached object not only changes its position, but also changes its rotation relative to the complete group of points?
 
all the "normal" ways of attaching don't seem to work. I tried select obj >group menu>attach>select group and also ungrouping the moving objects (since max doesn't let me attach anything to the whole group of points) and do a select and link.
 
i also tried to "fake" myself out of the situation, by exporting as static scene with moving camera because i thought if only the camera moves i dont have problems to attach my gemoetry to the points since they dont move. but in this case the points of course were still moving - only the other points were static ; )
 
thanks for any hint

Hi mdm,
I'm not a 3DSmax-user, so I can't help you out with this, since I have the impression, that this is more a 3DSMax- than a MM-issue.
Nevertheless, what you can try is the following:
Mark your (static) scene points as "Rigid Motion" and your (moving) car as "Static", than solve and export as "animate camera".
If you have a CG-model of your car, you may even use "Elastics" to strengthen your track.
It's just a work-around, I hope an experiences 3DMax-user can help you out with the real solution... :-)
Regards
Tim

Hi timefx,
 
thanks alot for your help.
i tried that already, but it won't work cause it breaks the matchmove. using elastics is also not an option in this case, cause a CG model of the vehicle does not exist. (at least i don't have one)
anyhow, it seems like i have a good solution that will work. if everything turns out the way i hope i will post the solution here.
 
mdm