Open the file
ch3_Positional Lighting.htmlin your HTML5 Internet browser. The page will look similar to the following screenshot:
The interface of this exercise is very simple. You will notice that there are no sliders to select the ambient and specular properties for the objects or the light source. This has been done deliberately with the objective of focusing on the new element of study—the light position. Unlike in previous exercises, the X, Y, and Z sliders do not represent light direction here. Instead, they allow us to set the light source position. Go ahead and play with them.
For clarity, a little sphere representing the position of the light source has been added to the scene. However, this is not generally required.
What happens when the light source is located on the surface of the cone or on the surface of the sphere?
What happens when the light source is inside the sphere?
Now, click on the button Animate. As you would expect, the lighting...
WebGL Beginner's Guide
WebGL Beginner's Guide
Overview of this book
WebGL is a new web technology that brings hardware-accelerated 3D graphics to the browser without installing additional software. As WebGL is based on OpenGL and brings in a new concept of 3D graphics programming to web development, it may seem unfamiliar to even experienced Web developers.Packed with many examples, this book shows how WebGL can be easy to learn despite its unfriendly appearance. Each chapter addresses one of the important aspects of 3D graphics programming and presents different alternatives for its implementation. The topics are always associated with exercises that will allow the reader to put the concepts to the test in an immediate manner.WebGL Beginner's Guide presents a clear road map to learning WebGL. Each chapter starts with a summary of the learning goals for the chapter, followed by a detailed description of each topic. The book offers example-rich, up-to-date introductions to a wide range of essential WebGL topics, including drawing, color, texture, transformations, framebuffers, light, surfaces, geometry, and more. With each chapter, you will "level up"ù your 3D graphics programming skills. This book will become your trustworthy companion filled with the information required to develop cool-looking 3D web applications with WebGL and JavaScript.
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Table of Contents (18 chapters)
WebGL Beginner's Guide
Credits
About the Authors
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Getting Started with WebGL
Rendering Geometry
Lights!
Camera
Action
Colors, Depth Testing, and Alpha Blending
Textures
Picking
Putting It All Together
Advanced Techniques
Index
Customer Reviews