virtualmesh
03-14-2006, 02:16 PM
This question relates to the use of position contraint versus linking for the root bone within a squash bone affect.
In DVD#2, one position contrains both root and nub bone to their respective driving dummy objects but in DVD#3, one position contrains just the nub bone to it's driving dummy object and links the root bone to it's driving dummy object. Which is the better method ?
Background, a single joint bone (root and nub) 'squash effect' example with position constraints on both bones...
1. create two dummy objects located where the ends of the squash effect will originate, link (or position contrain) each of these two dummy objects to the bone(s) within the underlying skeleton that will drive the 'squash effect'.
2. position contrain the root bone (within the squash bone chain) to one dummy object and it's nub bone to the other dummy (this will disconnect the two bones)
3. Place a Look At constraint on the root bone pointing to it's nub bone (this will connect the two bones again)
4. Within the Look At contraint, set the upnode to be the dummy object position contrained to the root bone in step 2 above (this will twist the root bone based on the dummy object it is position contrained to).
5. Select the root bone and within the Bone Tools > Object Properties window, set the root bone to 'Squash' and click on Reset Stretch' button.
In DVD#2, one position contrains both root and nub bone to their respective driving dummy objects but in DVD#3, one position contrains just the nub bone to it's driving dummy object and links the root bone to it's driving dummy object. Which is the better method ?
Background, a single joint bone (root and nub) 'squash effect' example with position constraints on both bones...
1. create two dummy objects located where the ends of the squash effect will originate, link (or position contrain) each of these two dummy objects to the bone(s) within the underlying skeleton that will drive the 'squash effect'.
2. position contrain the root bone (within the squash bone chain) to one dummy object and it's nub bone to the other dummy (this will disconnect the two bones)
3. Place a Look At constraint on the root bone pointing to it's nub bone (this will connect the two bones again)
4. Within the Look At contraint, set the upnode to be the dummy object position contrained to the root bone in step 2 above (this will twist the root bone based on the dummy object it is position contrained to).
5. Select the root bone and within the Bone Tools > Object Properties window, set the root bone to 'Squash' and click on Reset Stretch' button.