OpenGL ES: Going 3D
Super Jumper worked out rather well with the 2D OpenGL ES rendering engine. Now it’s time to go full 3D. We actually already worked in a 3D space when we defined our view frustum and the vertices of our sprites. In the latter case, the z coordinate of each vertex was simply set to 0 by default. The difference from 2D rendering really isn’t all that big:
- Vertices have not only x and y coordinates, but also a z coordinate.
- Instead of an orthographic projection, a perspective projection is used. Objects further away from the camera appear smaller.
- Transformations, such as rotations, translations, and scales, have more degrees of freedom in 3D. Instead of just moving the vertices in the x-y plane, we can now move ...