Open the file
ch6_Wall_LightArrays.htmlin your HTML5 browser. This scene looks exactly asch6_Wall_Final.html, however the code required to write this scene is much less as we are using uniform arrays. Let's see how the use of uniform arrays change our code.Let's update the vertex shader first. Open the file
ch6_Wall_LightArrays.htmlusing your favorite source code editor. Let's take a look at the vertex shader. Note the use of the constant integer expressionconst int NUM_LIGHTS = 3;to declare the number of lights that the shader will handle.Also, you can see there that a uniform array is being used to operate on light positions.
Note that we are using a varying array to pass the light rays (for each light) to the fragment shader.
//Calculate light ray per each light for(int i=0; i < NUM_LIGHTS; i++){ vec 4 lightPosition = uMVMatrix * vec4(uLightPosition[i], 1.0); vLightRay[i] = vertex.xyz - lightPosition[i].xyz; }This fragment...
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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WebGL Beginner's Guide
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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