OpenGL ES 2 for Android

Adding a Geometry Class

We now have a good idea of what we need to build a puck and a mallet: for the puck, we need one triangle fan for the top and one triangle strip for the side; for the mallet, we need two triangle fans and two triangle strips. To make it easier to build these objects, we’ll define a Geometry class to hold some basic shape definitions and an ObjectBuilder to do the actual building.

Joe asks:

Why Not Just Use a Library?

There are decent 3D libraries for Android out there, ranging from libgdx,^[36] a thin open-source wrapper, to more advanced commercial frameworks such as Unity3D.^[37] These libraries can help improve your productivity, ...