![]() ![]() ![]() But you don’t always have to type to add an Expression. You type these commands to tell AE what to do, and-assuming AE understands your commands-it does what you want it to do. That’s what Expressions are: typed commands. Whereas you use most tools by clicking on their icons (e.g., the pointer or the pen) and clicking or dragging with the mouse, you use Expressions by typing commands on the keyboard. ![]() Just as you use the Rotation tool and the Pen tool, you can use Expressions to control animation and composition in After Effects (AE). ix This page intentionally left blank Introduction WHAT ARE EXPRESSIONS? Expressions are tools. Most of all, thank you, Lisa, for putting up with all my geeky passions. Special thanks to Paul Temme, Dennis McGonagle, and Lianne Hong at Focal Press and my colleague Rich Harrington at Rhed Pixel. I thank both companies for their support and for their stimulating work environments. When I started this book, I was working for Future Media Concepts. I’d also like to thank AE experts Chris Meyers, Trish Meyers, Angie Taylor and the crew at for ideas and inspiration. Dan, thanks for the e-mails, the suggestions, and the support. 413 vii This page intentionally left blank Acknowledgments I am deeply indebted to Dan Ebberts, the world-renowned Expressions guru. 227 Math Is Your Friend.277 Advanced Techniques. CHAPTER 5 CHAPTER 6 CHAPTER 7 CHAPTER 8 CHAPTER 9 JavaScript for Expressions.171 PART 2 Foundations for Advanced Expressions Using Expressions CHAPTER 1 CHAPTER 2 CHAPTER 3 CHAPTER 4 Creating Simple Expressions.This page intentionally left blank Contents ACKNOWLEDGMENTS. ISBN: 978-6-6 For information on all Focal Press publications visit our website at 08 09 10 11 12 13 Printed in Canada 5 4 3 2 1 To Lisa This book is an expression of my everlasting love. TR858.G35 2008 778.5⬘345-dc22 2008034230 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. Cinematography-Special effects- Data processing. After Effects Expressions/by Marcus Geduld. Library of Congress Cataloging-in-Publication Data Geduld, Marcus. You may also complete your request on-line via the Elsevier homepage (), by selecting “Support & Contact” then “Copyright and Permission” and then “Obtaining Permissions.” ⬁ Recognizing the importance of preserving what has been written, Elsevier prints its books on acid-free paper whenever possible. Permissions may be sought directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone: (⫹44) 1865 843830, fax: (⫹44) 1865 853333, E-mail. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. TOKYO Focal Press is an imprint of Elsevier Focal Press is an imprint of Elsevier 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA Linacre House, Jordan Hill, Oxford OX2 8DP, UK Copyright © 2009 Marcus Geduld.Recommend PapersĪfter Effects Expressions This page intentionally left blank After Effects Expressions By Marcus Geduld AMSTERDAM PART 2 Foundations for Advanced Expressions. EXPRESSIONS IN WHICH ONE PROPERTY CONTROLS ANOTHER.
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