COMPUTER GRAPHICS with OpenGL (3rd Edition) Donald Hearn M COMPUTER GRAPHICS with OpenGL (3rd Edition) Donald Hearn M. Pauline Baker CG - Chapter - 1

A Survey of Computer Graphics (APPLICATIONS) CHAPTER - 1 A Survey of Computer Graphics (APPLICATIONS)

Definition & Tasks of Computer Graphics Definitions: generating 2D images of a 3D world represented in a computer. Producing pictures or images using computers Main tasks: modeling: (shape) creating and representing the geometry of objects in the 3D world; (Representing 3D objects) rendering: (light, perspective) generating 2D images of the objects; (Constructing 2D images from 3D models) animation: (movement) describing how objects change in time; (Simulating changes over time)

Why we need to study Computer Graphics? Graphics is cool I like to see what I am doing I like to show people what I am doing Graphics is interesting Involves - Simulation, Artificial Intelligence, Algorithms, Architecture… Graphics is fun Computer Graphics - Special effects, Image Processing

Applications Computers have become powerful for the rapid and economical production of pictures. Today, we find computer graphics used routinely in such diverse areas such as: science, engineering, medicine, business, industry, government, art, entertainment, advertising, education, and training.

Graphs and charts To draw simple graphs, data plotting, to generate highly complex data relationships. Used to summarize financial, statistical, mathematical, scientific, engineering, economic data reports etc.,

Computer-Aided Design (CAD) Used in design processes, particularly for engineering and architectural systems. Generally referred to as CAD, computer-aided design methods are now used in the design of buildings, automobiles, aircraft, watercraft, spacecraft, computers, textiles, home appliances etc.,

Virtual Reality (VR) Creation of VR environments in which user can interact with the objects in a 3-D’l scene. With VR systems, designers and users can move about and interact with objects in various ways. Used to train people to drive cars, aircrafts, submarines and heavy equipment machines.

Data Visualization Visual techniques are used as aid in the understanding and analysis of complex processes and mathematical functions. Used in scientific, business and medical visualization to study the behavior of complex process.

Education and training Computer generated models of physical, financial, political, social, and economic and other systems are often used as educational aids. For training applications, special hardware systems are designed. Simulators are used for practice sessions to train ship captains, aircraft pilots, military tanks operators, space shuttle operators, air-traffic control personnel and even for driving cars.

Computer Art Both fine art and commercial art make use computer graphics. Artists use advanced software, computers and tools for designing objects and cartoons used in movies.

Entertainment Television productions, motion pictures and music videos use CG methods. Animation movies were created with actors and scenes using computer-rendering techniques.

Image Processing The modification or interpretation of existing pictures, such as photographs and TV scans is called image processing. This is used to improve picture quality, analyze images, or recognize visual patterns for robotic applications. Medical and satellite images are analysed and processed using this methods.

Graphical User Interfaces (GUI) Now all software applications provide GUI environments which helps user easily to handle the software using the help of interactive pointing devices. CG - Chapter - 1