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Pro OpenGL ES for Android by Mayank Verma, Mike Smithwick

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Chapter 10

OpenGL ES 2, Shaders, and…

Her angel's face, As the great eye of heaven shined bright, And made a sunshine in the shady place.

—Edmund Spenser

There are two different versions of the OpenGL ES graphics library on your Android devices. This book has largely dealt with the higher-level one, known as OpenGL ES 1, sometimes referred to as 1.1, or 1.x. The second version is a rather confusingly named OpenGL ES 2. The first one is by far the easier of the two; it comes with all sorts of helper libraries doing much of the 3D mathematics and all of the lighting, coloring, and shading on your behalf. Version 2 eschews all of those niceties and is sometimes referred to as the “programmable function” version vs. the other's “fixed function” ...

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