ISO/IEC INTERNATIONAL STANDARD 14478-4 First edition 1998-12-15 Information technology -- Computer graphics and image processing Presentation Environment for Multimedia Objects (PREMO) - Part 4: Modelling, rendering and interaction component Technologies de I'information- Infographie et traitement d'images Environnement de présentation d'objets multimedia (PREMO) Partie 4: Composant pour la modelisation, le rendu et I'interaction IEC Tso Referencenumber ISO/IEC 14478-4:1998(E) ISO/IEC14478-4:1998(E) Contents Foreword. vii Introduction . vili Scope 9 2 Normative references. .9 Definitions. 10 3.1 PREMO Part 1 definitions 3.2 PREMO Part 2 definitions . .10 3.3 PREMO Part 3 definitions . .10 3.4 Additional Definitions .10 4 Symbols and abbreviations 12 5 Conformance ...12 6 Overview of the Modelling, Rendering and Interaction Component. . . . . .12 6.1 Introduction .12 6.2 Overview 6.3 Devices for Modelling, Rendering, and Interaction . .16 6.4 Primitives and Coordinates. 6.4.1 Introduction @ISO/IEC1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ISO/IEC14478-4:1998(E) ISO/IEC 6.4.2 Coordinates. 17 6.4.3 The Primitive Hierarchy in PREMO 17 6.4.3.1 Overview .17 6.4.3.2 Captured Primitives. . .18 6.4.3.3 Form Primitives .18 6.4.3.4 Modifier Primitives.. 6.4.3.5 Reference Primitives .19 6.4.3.6 Structured Primitives. 19 6.4.3.7 Tracer Primitives .19 6.4.3.8 Wrapper Primitives 6.4.4 Primitives and MRI Devices. 19 6.5 Scene 20 6.6 Interaction. 21 6.7 Coordinators 21 6.8 Dependencies on other Parts 23 6.9 Subtyping Diagram 23 Coordinates 23 7.1 General Coordinates . 7.2 Colour . 24 7.3 TimeLocation 25 8 Primitives. 25 8.1 Introduction 25 8.2 Captured Primitives. 8.3 Form Primitives. 27 8.3.1 Introduction. 8.3.2 Audio Primitives. 8.3.3 Geometric Primitives 28 8.3.4 Tactile Primitives 28 8.3.5 Text Primitives 8.4 Modifier Primitives 28 8.4.1 Introduction. 8.4.2 Acoustic Modifiers 29 8.4.3 Structural Modifiers 29 8.4.4 TimeFrame Modifiers. 29 8.4.5 Visual Modifiers. 30 8.5 Reference Primitives. . 30 8.5.1 References. .30 8.5.2 The Name Object Type. 8.6 Structured Primitives. 31 8.6.1 Introduction. 8.6.2 Aggregate. ..31 8.6.3 TimeComposite. .32 8.7 Tracer Primitives. 35 8.8 Wrapper Primitives 36 9 Modelling, Rendering and Interaction Device. . . 9.1 Introduction... 36 ii ISO/IEC 14478-4:1998(E) @ISO/IEC 9.2 MRI_Format .36 9.3 Efficiency .36 9.4 .37 10 Modeller 11 Renderer .38 12 MediaEngine. 13 Scene . .39 14 Interaction .42 14.1 Introduction 14.2 Input Device. ..42 14.3 Router. ..43 15 Coordinator .43 16 Functional Specification . Introduction 16.2 Non-object data types .45 16.3 Exceptions ...46 16.4 Objects for coordinate spaces. .47 16.4.1 Coordinate object . . 16.4.2 Colour object. . 48 16.4.3 TimeLocation object 48 16.5 Name object 16.6 Objects for media primitives .49 16.6.1 Primitive object. 16.6.2 Captured object. . .50 16.6.3 Objects describing primitives with spatial and/or temporal form. 50 16.6.3.1 Form object 50 16.6.3.2 Objects describing form primitives for audio media data 50 16.6.3.3 Objects describing form primitives for geometric media data. 51 16.6.4 Objects describing primitives for the modification of media data . 52 16.6.4.1 Modlifier object 52 16.6.4.2 Objects describing modifier primitives for audio media data 52 16.6.4.3 Objects describing modifier primitives for structural aspects of media data. . . 53 16.6.4.4 TimeFrume objecl 54 16.6.4.5 Objects describing modifier primitives for visual aspects of media data. 54 16.6.5Referenceobject. 55 16.6.6 Objects for organising primitives into structures 56 16.6.6.1 Structured object 16.6.6.2 Aggregue object. Objects for organising media data within time 56 16.6.6.3