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)

Time for Action: Orthographic and Perspective Projections

Let's look at an example covering the different types of projections:

  1. Open the ch04_06_projection-modes.html file in your browser.
  2. This exercise is very similar to the previous one. However, there are two new options under Projection Mode: Perspective and Orthogonal Projection. As you can see, Perspective is activated by default.
  3. Change the camera type to Orbiting.
  4. Change the projective mode to Orthographic.
  5. Explore the scene. Notice the lack of the depth cues characteristic of orthogonal projections:
  1. Switch to Perspective mode:
  1. Explore the source code. Go to the updateTransforms function:
function updateTransforms() {
const { width, height } = canvas;

if (projectionMode === PERSPECTIVE_PROJECTION) {
mat4.perspective(
projectionMatrix,
fov,
width / height,
10,
5000
)...