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Balraj Kumar, Lovely Professional University Unit 8: 3-D in Computer Graphics

Unit 8: 3-D in Computer Graphics

CONTENTS
Objectives
Introduction
8.1 3-D Representations
8.1.1 Splines
8.1.2 Surfaces

8.1.3 Curves
8.1.4 Add-ons: Polygon Rendering
8.2 3-D Transformation
8.2.1 Translation
8.2.2 Scaling
8.2.3 Rotation
8.2.4 3-D Clipping

8.3 3-D Viewing
8.3.1 The Viewing Pipeline
8.3.2 Camera Coordinates
8.3.3 Viewing Volume
8.4 Summary
8.5 Key words

8.6 Self Assessment
8.7 Review Questions
8.8 Further Readings

Objectives
After studying this unit you will be able to:

• Explain 3-D representations
• Elaborate on 3-D transformations
• Discuss 3-D viewing
Introduction

Computer graphics is a vast field that composes of all the graphical images aspects. They can be
categorized into 2-D, 3-D, 5-D and animated graphics. This unit mainly deals with the creation of
images with respect to 3-D scenarios. Today, we have multiple applications for computer images like
simulation and training, medical images, special effects for films, and so on.
Three dimensional graphics deal with the generation of images from nonrepresentational data of an
object. The 3-D object models are projected on a 2-D plane. These models are converted to graphical
images when they are displayed on the computer screen. They are not only limited to virtual space
because they can also be printed. They are the realistic renderings of the surfaces, illumination sources,
and so on.

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