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WebGL Beginner's Guide

You're reading from   WebGL Beginner's Guide If you're a JavaScript developer who wants to take the plunge into 3D web development, this is the perfect primer. From a basic understanding of WebGL structure to creating realistic 3D scenes, everything you need is here.

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Product type Paperback
Published in Jun 2012
Publisher Packt
ISBN-13 9781849691727
Length 376 pages
Edition 1st Edition
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Table of Contents (18) Chapters Close

WebGL Beginner's Guide
Credits
About the Authors
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with WebGL FREE CHAPTER 2. Rendering Geometry 3. Lights! 4. Camera 5. Action 6. Colors, Depth Testing, and Alpha Blending 7. Textures 8. Picking 9. Putting It All Together 10. Advanced Techniques Index

Time for action – updating uniforms in real time


  1. Open the file ch3_Sphere_Goraud_Lambert.html in your favorite HTML5 browser.

  2. You will see that this example has some widgets at the bottom of the page. These widgets were created using JQuery UI. You can check the code for those in the HTML <body> of the page.

    • X,Y,Z: controls the direction of the light. By changing these sliders you will modify the uniform uLightDirection.

    • Sphere color: changes the uniform uMaterialDiffuse, which represents the diffuse color of the sphere. Here we use a color selection widget so you can try different colors. The updateObjectColor function receives the updates from the widgets and updates the uMaterialDiffuse uniform.

    • Light diffuse term: changes the uniform uLightDiffuse, which represents the diffuse color of the light source. There are no reasons as to why the light color has to be white; however for the sake of simplicity, in this case, we are using a slider instead of a color to restrict the light...

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