2010

Table Of Contents
of the model and IK is required so that it can be posed and keyframed to
provide a convincing animation.
In this lesson you learn how to:
Create and use hierarchies to define logical relationships between
animatable objects.
Combine the components of a 3D mechanical arm model into a
hierarchical grouping.
Construct a skeleton for use with IK.
Combine the skeleton with the mechanical arm model by parenting the
components into a hierarchy.
Create an IK system to allow the skeleton hierarchy to be posed.
Create a control object to manipulate the IK system.
Use constraints to control the position and orientation of components
within the IK system.
Limit the range of movement on the IK system.
Pose and set keyframes for the IK system.
Animate an object by constraining its motion to two or more objects.
Open the scene for the lesson
In this lesson, you work with a scene we created for your use. In the first steps
of this lesson, you open the scene and view the various elements that have
been created for your use.
1 Make sure youve done the steps in
Preparing for the lessons on page 199.
2 Open the scene file named IK_MechArm.mb.
This file can be found in the GettingStarted directory that you set as
your Maya project: GettingStarted/Anim.
The scene contains a model of a mechanical arm and a cargo box to be
moved by the arm. The components of the mechanical arm include:
A cargo magnet cup on the end
Three arm segments
Open the scene for the lesson | 277