I'm trying to run osgEarth on an iPad which only implement OpenGL ES 2.
But after investigate some classes like "ShaderFactory", it just looks quite impossible. Everything seems to be implemented for OpenGL ES 3. Interface Blocks are used, "in/out" instead of "attribute" everywhere and so on.
Does someone have migrate/fork the shaders code for OpenGL ES 2 ? Or do I miss something simple ?