Join EJ Hassenfratz for an in-depth discussion in this video Understanding IK and forward kinematics, part of Mograph Techniques: Rigging a Robot Arm in Cinema 4D.
…There are two basic rigging setups for rigging…up an object or a character for animation.…And we'll be covering the differences between the…two, so you better understand all the rigging lingo.…So the first thing I'll go over is forward kinematics,…or FK, and that's the setup we have right now.…So FK is where any given piece can only affect the…parts of the arm that fall below it in the hierarchy here.…So if I rotate…the upper arm, it's going to move the forearm and the claw with it.…
Now in animating with forward kinematics, you need to navigate through your…hierarchy and manually change the rotation…and position of each arm part individually.…So to bend this arm, I'll need to bend the upper arm and then…the forearm individually. And then if I want the claw, I can rotate…that individually as well.…But I have to rotate each individual piece here and…then set key frames for each of those rotations and movements.…And when you've set all these key frames for all these different…arm parts, you can really get into a big mess of key frames.…
- Setting up the model
- Creating an IK chain
- Adding animation controls
- Constraining position, scale, and rotation
- Adding depth of field and motion blur in After Effects