• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 14. Set Key Animation > Hierarchical Linking and Dummy Objects

Hierarchical Linking and Dummy Objects

Other important topics covered in this chapter are hierarchical linking and dummy objects. With hierarchical linking, you set up an ancestry between objects. A child is linked to a parent, the parent to a grandparent, the grandparent to a great-grandparent, and so on. The basic principle is that the child must always follow its parent, but can have its own actions. An example might be a train with boxcars. All the boxcars follow the locomotive, but each boxcar bumps and rounds the curves on its own. Another example is a hand, forearm, and upper arm. The hand is doing its own thing, but never leaves the forearm, which is always attached to the upper arm.

Although objects can certainly be linked to one another, the use of dummy objects offers more flexibility and control. A dummy object is a nonrenderable cube that can function as a control handle or secondary pivot point within a hierarchy. An example of this might be a planet and moon system, where the moon is linked to a dummy at the center of the plant. As the dummy rotates, the moon orbits the planet, but the moon can have motion independent of the rotation that moves it closer to the planet at certain points in the orbit. Each action is completely independent of the other, and therefore more manageable.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint