UNIT I 2D PRIMITIVES INTRODUCTION 1 SNSCE/IT/ARUNA.

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Presentation transcript:

UNIT I 2D PRIMITIVES INTRODUCTION 1 SNSCE/IT/ARUNA

1.1 DEFINITION Computer Graphic is the discipline of producing picture or images using a computer which include Modeling Creation Manipulation storage of geometric objects Rendering converting a scene to an image the process of transformations Rasterization shading Illumination animation of the image, etc. 2 SNSCE/IT/ARUNA

3 MODELING CREATION MANIPULATION Geometric objects

1.1RENDERING SNSCE/IT/ARUNA 4 Process of generating an image from a model

CONVERTING A SCENE TO AN IMAGE SNSCE/IT/ARUNA 5

Rasterization Task of taking an image described in a vector graphics format (shapes) Converting it into a raster image (pixels or dots) for output on a video display or printer or for storage in a bitmap file format. SNSCE/IT/ARUNA 6

Shading SNSCE/IT/ARUNA 7

Shading SNSCE/IT/ARUNA 8

ILLUMINATION The transport of luminous flux from light sources between points via direct and indirect paths Lighting - the process of computing the luminous intensity reflected from a specified 3-D point SNSCE/IT/ARUNA 9

Animation of the image The process used for generating animated images SNSCE/IT/ARUNA 10

1.2 APPLICATION  Computer Aided Design (CAD) SNSCE/IT/ARUNA 11

PRESENTATION GRAPHICS  Generating the report and summaries the financial statistical, economic, research etc., SNSCE/IT/ARUNA 12

COMPUTER ART SNSCE/IT/ARUNA 13 cartoon diagram produced with paint brush program, artist work at monitor Electronic watercolor Electronic Avalanche

SNSCE/IT/ARUNA 14 Sphere of influence

SNSCE/IT/ARUNA 15

SNSCE/IT/ARUNA 16

ENTERTAINMENT SNSCE/IT/ARUNA 17 star trek-the Wrath of khan

SNSCE/IT/ARUNA 18 Computer generated Scene KNICKKNACK Red’s dream

TV series SNSCE/IT/ARUNA 19 graphics combined with a live scene

SNSCE/IT/ARUNA 20 reconstruction of thirteenth century

SNSCE/IT/ARUNA 21 MORPHING

EDUACTION AND TRAINING SNSCE/IT/ARUNA 22 Nuclear reactor Flight simulator motion Naval SimulatorSpace shuttle Automobile

VISUALIZATION SNSCE/IT/ARUNA 23 technique for creating images, diagrams, or animations to communicate a message.

IMAGE PROCESSING SNSCE/IT/ARUNA 24

GRAPHICAL USER INTERFACE SNSCE/IT/ARUNA 25

1.3 OVERVIEW OF GRAPHICS SYSTEM SNSCE/IT/ARUNA 26 Video Display Devices Raster-Scan Systems Graphics Workstations and Viewing Systems Input Devices Hard-Copy Devices Graphics Networks Graphics on the Internet Graphics Software Introduction to OpenGL Summary

VIDEO DISPLAY DEVICES SNSCE/IT/ARUNA 27 Video Monitor OUTPUT DEVICES cathode-ray tube (CRT) OPERATION

CATHODE-RAY TUBE (CRT) SNSCE/IT/ARUNA 28 Basic design of a magnetic-deflection CRT

CATHODE-RAY TUBE (CRT) SNSCE/IT/ARUNA 29 Raster-Scan Displays

SNSCE/IT/ARUNA 30 Random-Scan Displays

SNSCE/IT/ARUNA 31 Color CRT Monitors

Flat-Panel Displays SNSCE/IT/ARUNA 32 Liquid crystal displays (LCD) Plasma panels Electroluminescent panels (ELD) Light-emitting diode display (LED)

SNSCE/IT/ARUNA 33 Three-Dimensional Viewing Devices

SNSCE/IT/ARUNA 34 Stereoscopic and Virtual-Reality Systems

PRINTABLE CROSS CROSS EYE VIEWER SNSCE/IT/ARUNA 35

SNSCE/IT/ARUNA 36

RASTER-SCAN SYSTEMS SNSCE/IT/ARUNA 37 Rectangular pattern of image capture and reconstruction in television

GRAPHICS WORKSTATIONS AND VIEWING SYSTEMS SNSCE/IT/ARUNA 38 An artist’s workstation, featuring a monitor, a keyboard, a graphics tablet with a hand cursor, and a light table, in addition to data storage and telecommunications devices High resolution (2048 by 2048) graphics monitor.

SNSCE/IT/ARUNA 39

INPUT DEVICES SNSCE/IT/ARUNA 40 Keyboards, Button Boxes, and Dials Mouse Devices Z mouse features three buttons, a mouse ball underneath, a thumbwheel on the side, and a trackball on top Trackballs and Spaceballs

SNSCE/IT/ARUNA stick, 2. base, 3. trigger, 4. extra buttons, 5. autofire switch, 6.throttle, 7. hat switch (POV hat), 8.suction cup.

SNSCE/IT/ARUNA 42 Data GlovesDigitizers

SNSCE/IT/ARUNA 43 Scanner Touch Panels

LIGHT PEN SNSCE/IT/ARUNA 44

SNSCE/IT/ARUNA 45 Voice Systems

SNSCE/IT/ARUNA 46 HARD-COPY DEVICES

GRAPHICS SOFTWARE  General graphics programming packages are GL (Graphics Library)  OpenGL  VRML (Virtual-Reality Modeling Language)  Java 2D  Java 3D SNSCE/IT/ARUNA 47

Coordinate representation SNSCE/IT/ARUNA 48

Graphics Functions  Graphics package provides users with a variety of functions for creating and manipulating pictures  Graphics output, input, Attribues, transformations, viewing, subdividing pictures, or general control.  Graphics output primitives - points, straight lines, curved lines, filled color areas (usually polygons), and shapes SNSCE/IT/ARUNA 49