Redesign OpenGL Buffer creation pipeline

[athanggupte]

The current implementation of the OpenGL Buffer creation mechanism involves a diamond inherence from the OpenGL{XYZ}Buffer classes to the Buffer base class through the {XYZ}Buffer abstract class and the OpenGLBuffer abstract class.
This is not only a bad design strategy but can also slow down the code in the long run when a lot of buffers are built and managed.

Redesigning the entire Buffer class hierarchy and the creation pipeline is highly advisable.
Methods to consider:

• Create a OpenGLBufferFactory which can create the different OpenGL{XYZ}Buffer classes which can avoid the diamond hierarchy and also reduce code repetition.