Creating animations
As we mentioned in the Where to build animations section, the type of animation we’ll do in Blender involves having individual parts of a system that move independently from each other or collaboratively move together sometimes. We also said that we would need a method called rigging, so let’s give an example to understand why rigging is useful.
When you talk, whether you are sitting or walking, the muscles and bones that are responsible for the talking are generally not affected by or affecting the other parts of your body. However, when you are walking, your legs rotate around the hip bones, and the rest of the system triggers other natural actions, such as swinging your arms, moving your shoulders slightly forward and backward, and so on.
In both cases where you have a local or system-wide dependency, we eventually move some of the vertices that make up a model. Since moving so many vertices is a lot of work, we use a structure we place inside...