2010

Table Of Contents
2 Click stop on the TimeSlider playback controls to stop the playback.
You have completed this lesson.
Beyond the lesson
In this lesson, you completed the animation of a mechanical arm model that
picked up and moved a cargo box. You learned how to:
Construct a model hierarchy to provide relationships between the
components for posing and keyframing.
Construct a single chain skeleton to pose the arm model using Inverse
Kinematics.
It is common to create characters with multiple joint chains. For example,
two and four-legged characters would use multiple joint chain skeletons
to assist with posing their hierarchical structure. See Skeleton hierarchy in
the Maya Help. For a tutorial on creating a multiple chain skeleton see
Lesson 1: Skeletons and Kinematics (
Introduction on page 318).
Parent the components of the mechanical arm model into the skeleton
hierarchy.
Parenting is one method for combining a model into a skeleton hierarchy.
When using characters that have bending or deforming features a more
common technique is to use Skin > Bind Skin. For more information see
Skeletons and skinning in the Maya Help. For a tutorial on smooth skinning
see Lesson 2: Smooth Skinning (
Introduction on page 318).
An easy method to parent one node to another using the Hypergraph is
to drag one node over top of the other using your middle mouse button.
Create an IK system with a control object for manipulation.
It is very common to create characters with multiple joint chains and
multiple IK handles to control them. Control objects simplify the selection
and posing of the character.
Use three types of constraints (Point, Orient, Parent) to control components
of the IK system and other components in the scene.
Constraints are useful for animating the attributes of one object based on
the attributes of another. Other types of constraints not covered in this
lesson include aim and scale constraints. See Aim constraints and Scale
constraints in the Maya Help.
Using the parent constraint, the platform could also be animated to move
the cargo box as if it were on an elevator, or a conveyor belt.
Beyond the lesson | 315