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MEL Scripting for Maya Animators
 
 

MEL Scripting for Maya Animators, 2nd Edition

 
MEL Scripting for Maya Animators, 2nd Edition,Mark Wilkins,Chris Kazmier,ISBN9780120887934
 
 
 

  &      

Morgan Kaufmann

9780120887934

9780080470719

552

235 X 191

The best introductory book on Maya's scripting language now in a new edition

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Key Features

* Fully updated with several new chapters.
* Profusely illustrated and includes a companion Web site with numerous code examples and scene files.
* The authors bring their extensive experience in professional production studios to provide expert guidance.

Description

Trying to learn Maya programming from the documentation can be daunting whether or not you are a programmer. The first edition of MEL Scripting for Maya Animators earned the reputation as the best introductory book on MEL, Maya’s scripting language. Now fully revised and updated, the second edition also includes new features, such as a discussion of global procedures, new chapters on fixing programming bottlenecks, advanced user interface techniques, and optimizing character rigs. New chapters on utility nodes and Maya's Web Panel feature provide new ideas on how to use MEL in applications.

This new edition has kept the popular style of the first edition that offered very clear explanations of programming concepts to those without programming experience. A generous collection of code examples and Maya scene files is included on the companion Web site. This is a book for animators, artists, game developers, visual effects developers, and technical directors who want to learn the fundamentals of Maya, how to automate tasks, personalize user interfaces, build custom tools, and solve problems with MEL.

Readership

Technical and nontechnical animators, artists, game developers, visual effects developers, and technical directors.

Mark Wilkins

Mark R. Wilkins is a technical director at DreamWorks Animation SKG, where he helped develop a production pipeline using Maya for effects and character animation. Mark also provides training and technical assistance to animators using Maya. He previously worked at Walt Disney Feature Animation in a variety of positions including software engineer and scene setup supervisor. He has contributed to a number of films, including Dinosaur, Mission: Impossible 2, Minority Report, and Madagascar. Mark holds a degree in physics from Harvey Mudd College.

Affiliations and Expertise

DreamWorks Animation SKG, Glendale, CA, USA

Chris Kazmier

Chris Kazmier is a senior technical director at Sony Pictures Imageworks, where he creates computer-generated effects for live-action films. He has worked on projects ranging from The Haunted Mansion to Sony's first all 3D feature animation Open Season. Previously, Chris worked at DreamWorks on Sinbad and at PDI/DreamWorks on the Intel Aliens ad campaign. Credits also include Fox Animation Studio's Titan AE and Anastasia.

Affiliations and Expertise

Sony Pictures Imageworks, Culver City, California, U.S.A.

MEL Scripting for Maya Animators, 2nd Edition

Preface
Special Acknowledgment

Chapter 1 Maya Under the Hood
In this chapter you will learn
Why Look Under the Hood?
The Dependency Graph, Attributes, and Connections
Example 1: Using the Hypergraph to Explore the Dependency Graph
Transform Hierarchy and Parent/Child Relationships
Examining the Hierarchy
Transform and Shape Nodes
Example 2: Exploring Transform and Shape Nodes, Instancing, and History
MEL and Maya’s User Interface
What to Remember About How Maya Works Behind the Scenes

Chapter 2 The Basics of MEL Commands
In this chapter you will learn
Can I Use MEL Without Scripting?
Command Line and Command Feedback Line
Command Shell
Script Editor
Script Editor Versus Command Shell
Script Editor’s Messages as MEL Code
Making a Shelf Button for a MEL Script
Saving a MEL Script
Seductive Dangers of the Status Message Area
The whatIs Command
Basic Structure of MEL Commands
Where to Find Information About Maya and MEL on the Internet Newsgroups
How to Use MEL Scripts Found on the Internet
What to Remember About How to Use MEL Without Writing Scripts

Chapter 3 Using Expressions
In this chapter you will learn
What Is an Expression?
How Does an Expression Work?
Equals Sign: Equality and Assignment
How Maya Implements Expressions
Is Maya’s Expression Language the Same as MEL?
When (and When Not) to Use an Expression
Defining Relationships Between Attributes
What Is Operator Precedence?
Walkthrough of Maya’s Expression Language
Definitions of Variables
Computing the Values of Attributes
Assigning Computed Values
Example 1: Eyes
Analyzing the Problem
Planning the Eyes’ Animation Controls
Writing the Expression
What to Remember About Using Expressions

Chapter 4 Controlling Particles with Expressions
In this chapter you will learn
Two Kinds of Particle Object Attributes: Per Object and Per Particle
All About Vectors
Two Kinds of Expressions: Ordinary and Particle
Example 1: Ordinary Expressions and a Newton Field
Example 2: A Simple Particle Expression
A Few Hints for Efficient Particle Expressions
Example 3: Helical Particles Around a Curve
What to Remember About Particle Expressions in Maya

Chapter 5 Problem Solving with MEL Scripting
In this chapter you will learn
MEL’s Role in Maya: Building Scenes
Strategies for Planning MEL Applications
The Simplest User Interface
Creating, Editing, and Querying Nodes in MEL
Adding, Setting, and Getting Values of Attributes in MEL
Connecting Attributes in MEL
Creating and Connecting Expression Nodes in MEL
Example 1: Using MEL to Automate Setup for Spiral Particles
What to Remember About Writing MEL Scripts

Chapter 6 Variables and Data Types
In this chapter you will learn
Declaring Variables (and Not Declaring Them)
Environment Variables
MEL Statements and Type Checking
Simple and Aggregate Data Types
What to Remember About Variables and Data Types in MEL

Chapter 7 Using MEL Commands
In this chapter you will learn
What Is a MEL Command?
Structure of a MEL Command
Using MEL Commands in MEL Scripts
Avoid Using MEL Commands in Expressions
What to Remember About Using MEL Commands

Chapter 8 Manipulating Nodes in MEL
In this chapter you will learn
Using ls Command to Find Nodes by Name or Other Properties
Using Select Command to Manage Object Selection
Creating Nodes in a Maya Scene
Finding a Node’s Parents and Children
Finding Information on Node Connections
About Maya’s Node Types and the Node and Attribute Reference
What to Remember About Managing Nodes in MEL

Chapter 9 Controlling the Flow of Execution
In this chapter you will learn
Controlling the Flow of Script Execution
Basic Conditional Operations: if-else and switch Loops
What to Remember About Controlling the Flow of Execution in MEL

Chapter 10 Procedures and Functions
In this chapter you will learn
Top-Down Design
Example 1: A Trip to the Grocery Store
What Are Procedures and Functions?
Example 2: Geometry-Constrained Locators
Example 3: Recursive Antenna
What to Remember About Procedures, Functions, and Top-Down Design in MEL

Chapter 11 Naming Nodes, Scripts, and Variables
In this chapter you will learn
Why Naming Conventions Are Important
Naming Scripts
Naming Variables
Naming Nodes
Example 1: Adding a Name Prefix to Objects in a Hierarchy
Example 2: Changing Name Prefixes in a Hierarchy
What Are Namespaces?
Strategies for Using Namespaces
What to Remember About Naming Scripts, Variables, and Nodes

Chapter 12 Designing MEL User Interfaces
In this chapter you will learn
What Is a User Interface?
What Maya Users Expect to See from a MEL Script
Questions to Answer Before Designing a User Interface
Designing and Testing a User Interface
Structure of a Dialog Box
What to Remember About Designing User Interfaces in MEL

Chapter 13 Simple MEL User Interfaces
In this chapter you will learn
Collecting Information from Users
Validating User Input: When and Why
Asking for Confirmation with confirmDialog
Asking User for Text String with promptDialog
Asking User to Pick File or Directory with fileDialog
Handling Warnings and Errors with Warning and Error Commands
Using Regular Expressions and match to Validate Data
How Regular Expressions Work
Validating Integers
Validating Floating-Point Numbers
Validating Object Names (Without Namespaces)
Example 1: Simple Dialogs and Input Validation
What to Remember About Simple MEL User Interfaces and Input Validation

Chapter 14 Custom Dialog Boxes
In this chapter you will learn
How to Structure a Script That Uses a Custom Dialog Box for Input
Dialog Boxes and Their Contents
Example 1: Making the Example Dialog Box
Common Types of Controls
Common Types of Layouts
Example 2: Dialog Box for Making Geometric Primitives
What to Remember About Building Custom Dialog Boxes in MEL

Chapter 15 Making Advanced Dialog Boxes with formLayout
In this chapter you will learn
Why Use formLayout?
Planning a Dialog Box for formLayout
Using formLayout: Overview
Using formLayout: Defining Placement Rules for UI Objects
Example: Implementing a Dialog Box with formLayout
What to Remember About Making Dialog Boxes with formLayout

Chapter 16 Making Advanced Dialog Boxes with Web Panels
In this chapter you will learn
What You Need to Know Before You Proceed
What Are Web Panels?
Learning Web Authoring
How a Dialog Box Built with Web Panels Works
Planning a Dialog Box for Web Panels
Creating a Web-Based Dialog Box for Maya
Launching a Web-Based Dialog Box from MEL
Example 1: Implementing a Dialog Box using JavaScript
Ideas for Dialog Boxes Built with Web Panels
What to Remember about Making Dialog Boxes with Web Panels

Chapter 17 Improving Performance With Utility Nodes
In this chapter you will learn
What Is a Utility Node?
When Should You Consider Using a Utility Node?
How to Create and Connect a Utility Node
Example 1: Using the plusMinusAverage node to find the midpoint between two locators
Common Utility Nodes
What to Remember About Improving Performance
With Utility Nodes

Chapter 18 Installing MEL Scripts
In this chapter you will learn
Installing a Script to Make It Available in All Scenes
Installing a Script to Run When Maya Starts
Installing a Script into a Script Node in a Scene
Installing Custom Menus
Managing Button Shelves and Creating Custom Shelf Icons
What to Remember About Installing MEL Scripts

Chapter 19 Examples Using MEL with Particle Dynamics
Example 1: Introduction to Particle Goals
Example 2: Particle Goals on a Surface
Example 3: Using Goals on Multiple Surfaces
Example 4: Using Goals on Surfaces, Part 2

Chapter 20 Examples Using MEL with Solid Body Dynamics
Example 1: Particle Collisions
Example 2: Collision Events
Example 3: Collisions Between Objects in Solid Dynamics
Example 4: Solid Dynamics and Particles

Chapter 21 Example of a Simple Crowd System
Example 1: Creating a Vehicle
Example 2: Vehicle Interaction
Example 3: Vehicle Environment
Example 4: Fine Tuning and Completing the Script
Full Script Reference: crowdSystem.mel

Chapter 22 Examples Using MEL in Character Rigging
Example 1: Character Controls
Example 2: Building a Character User Interface
Full Text of mrBlahControls.mel

Index

Quotes and reviews

"Reading and following the lessons of this book provides one of the best ways for a casual Maya user to elevate their skills to a professional level. The fundamental techniques developed in MEL Scripting for Maya Animators are critical for visual effects artists to learn."
— Scott Stokdyk, Visual Effects Supervisor, Sony Pictures Imageworks

"While the first edition opened the doors to MEL scripting for interested Maya users, this expanded and updated second edition delves deeper into important programming concepts, and new features in Maya released since the original edition. No longer just for the first steps in MEL programming, this edition takes the reader into the depths of advanced topics such as user interface layout and web panels that are sure to make this book a frequently used and a welcome addition to any technical director's bookshelf."
— Doug Cooper, Visual Effects Supervisor, DreamWorks Animation

"MEL Scripting for Maya Animators is the set of keys you need to get under the hood of Maya. The book is well written for both technical and non-technical animators. It is an essential tool in making sophisticated animation not only possible but also practical."
— Henry LaBounta, Senior Art Director, Electronic Arts

"This new edition is – as was the first edition – the very best of an extremely small number of books that even attempt to cover the subject of scripting animation. The authors take great pains to explain where pertinent features, graphs, and editors are found, and to paint a picture of the interconnectivity of Maya’s various networked nodes.
If you’re just getting started or are advanced enough to want the second edition’s beefed up content, there’s an empty spot for this book next to your monitor right now. But make sure there is enough space for a few pads of sticky notes and a couple of highlighting markers. You’ll want to ink this one up."
— Game Developer, December 2005
 
 
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