A flat triangle floating in 3D space may be amazing, but it's nothing compared to what we're going to do next: a 3D cube!
The triangle, with just three vertices, was declared in the
MainActivity class to keep the example simple. Now, we will introduce more complex geometry. We'll put it in a class named
Okay, it's just a cube that is composed of eight distinct vertices, forming six faces, right?
Well, GPUs prefer to render triangles rather than quads, so subdivide each face into two triangles; that's 12 triangles in total. To define each triangle separately, that's a total of 36 vertices, with proper winding directions, defining our model, as shown in
CUBE_COORDS. Why not just define eight vertices and reuse ...