Libgdx – leading framework for creating cross-platform (Android, HTML5, simple desktop application) games in Java.Open GL ES 2.0- standard of supporting graphics in mobile and embedded devices, together with GLSL language (Shading Language) used to write shaders.That’s why the course involves two complementary and interwoven issues: Working with graphics for mobile devices requires not only the knowledge of existing libraries and solutions but also understanding the low-level issues: OpenGL ES 2.0 standard and rendering pipeline. It focuses on effective graphics support and 2D/3D animation. and when you have more time no problem to make a quick view on the old versions for more understanding how the things were and get developed and why.The training concentrates on the technical side of creating games for Android devices. so I advise you to start learning or using OpenGL ES 3.0+ (in case its your target API) because now and the next generation will not use the old versions especially with more powerful hardware and graphics cards we have today and if your target is OpenGL start with v3.3+ or 4.0+.

the last version of OpenGL ES is 3.2 it can now provide support for Tessellation for additional geometry details and new geometry shaders. OpenGL ES has less terms and functions than OpenGL, think of it as you are taking just what you need for that system, because if we dont need a function in whole our work or the hardware can't deal with it, then no mean to add that function but this also makes the use of this API more hard because of the need to write more Shaders and complicated codes to make something simple because OpenGL ES does not provide Shaders in the graphics pipeline as OpenGL. so its a subset of OpenGL and widely used in cell phones and some VR systems, it's designed for less sophisticated hardware. OpenGL ES is simply the OpenGL API for embedded systems (OpenGL ES refers to OpenGL Embedded Systems).

Opengl es 2.0