Book Image

Real-Time 3D Graphics with WebGL 2 - Second Edition

By : Farhad Ghayour, Diego Cantor
5 (1)
Book Image

Real-Time 3D Graphics with WebGL 2 - Second Edition

5 (1)
By: Farhad Ghayour, Diego Cantor

Overview of this book

As highly interactive applications have become an increasingly important part of the user experience, WebGL is a unique and cutting-edge technology that brings hardware-accelerated 3D graphics to the web. Packed with 80+ examples, this book guides readers through the landscape of real-time computer graphics using WebGL 2. Each chapter covers foundational concepts in 3D graphics programming with various implementations. Topics are always associated with exercises for a hands-on approach to learning. This book presents a clear roadmap to learning real-time 3D computer graphics with WebGL 2. 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 3D computer graphics topics, including rendering, colors, textures, transformations, framebuffers, lights, surfaces, blending, geometry construction, advanced techniques, and more. With each chapter, you will "level up" your 3D graphics programming skills. This book will become your trustworthy companion in developing highly interactive 3D web applications with WebGL and JavaScript.
Table of Contents (14 chapters)

Alpha Blending

A fragment is available for alpha blending only if it has passed the depth test. By default, depth testing is disabled and makes all fragments available for alpha blending.

Alpha blending is enabled using the following line of code:

gl.enable(gl.BLEND);

For each available fragment, the alpha blending operation reads the color from the framebuffer by the appropriate fragment coordinates and creates a new color based on a linear interpolation between the previously calculated color in the fragment shader and the color from the framebuffer.

Alpha Blending

Alpha blending is disabled by default in WebGL.

The Blending Function

With blending enabled, the next step is to define a blending function. This function will...