19-01 - 8805-88 E295900 E06T5 ISO INTERNATIONAL STANDARD 8805 First edition 1988-09-15 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION Information processing systems - Computer graphics - Graphical Kernel System for Three Dimensions (GKS-3D) functional description Systemes de traitement de I'information - Infographie - Systeme graphique de base pour trois dimensions (GKS-3D) description fonctionnelle Referencenumber ISO 8805: 1988 (B) 9 h295900 E06t59h 8805-88 ISO 8805 : 1988 (E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (SO member bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees.Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmen- tal and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the 75 %o approval by the member bodies voting. International Standard ISO 8805 was prepared by Technical Committee ISO/TC 97, Information processing systems. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. @International Organization for Standardization, 1988 ii 8805-88 4851903 0065675 ISO 8805 : 1988 (E) Contents 0 Introduction Scope and field of application. 2 3 Definitions. 4 The Graphical Kernel System for Three Dimensions. .14 4.1 About this International Standard. 4.1.1 Specification... 4.1.2 Registration... .14 4.2 Introduction to GKS-3D... .15 4.3 Concepts 17 4.4 Graphical output. 20 4.4.1 Output primitives. 4.4.2 Output primitive attributes .... .21 4.4.3 Polyline attributes.... ..2 4.4.4 Polymarker attributes.. 4.4.5 Text attributes ..... 4.4.6 Text extent and concatenation : 4.4.7 Fill area attributes... ..39 4.4.8 Fill area set attributes.. ..41 4.4.9 Cell array attributes...... 42 4.4.10 Generalized Drawing Primitive attributes.. 42 4.4.11 Colour.... 4.4.12 View index 43 4.4.13 Hidden line/hidden surface removal (HLHSR) identifier . 4.5 Workstations.. 4.5.1 Workstation characteristics. 4.5.2 Selecting a workstation.. .45 4.5.3 Deferring picture changes .. ..46 4.5.4 Clearing the display space .50 4.5.5 Elimination of primitives outside segments 4.5.6 Sendingmessagestoaworkstation. .51 4.5.7 Hidden line/hidden surface removal .... ...51 4.6 Coordinate systems and transformations .... 4.6.1 Normalization transformations .52 4.6.2 Clipping... 4.6.3 Workstation transformations.. 4.6.4 Transformation of locator input 4.6.5 Transformation of stroke input.. .59 4.6.6 59 4.6.7 Viewing utility functions. 4.7 ...70 4.7.1 Introduction to segments ... 4.7.2 Segment attributes . 4.7.3 Segment transformations. 4.7.4 Clipping and WDSS. 72 ii International Organization for Standardization ed withoutlicense fromIHS Not for Resal 9295900 E06 8805-88 ISO 8805 : 1988 (E) 4.7.5 Workstation Independent Segment Storage.. 72 4.7.6 WISS functions and clipping... 4.8 4.8.1 Introduction to logical input devices. .74 4.8.2 Logical input device model... 4.8.3 Operating modes of logical input devices ... .76 4.8.4 Measures of each input class. 79 4.8.5 Input queue and current event report . ..80 4.8.6 Initialization of input devices....... 81 4.8.7 Locator and stroke input using 2D input devices. 4.9 GKS..3D Metafile interface.. .83 4.10 GKS-3D levels.. 4.10.1 Introduction to levels.. 4.10.2 The level structure... .85 4.10.3 Level functionality 4.11 States of GKS-3D and inq