Summary
In this chapter, we built a Cardboard Android app from scratch, starting with a new project and adding Java code a little bit at a time. In our first build, we had a stereoscopic view of a triangle that you can see in a Google Cardboard headset.
We then added the model transformation, 3D camera views, perspective and head rotation transformations, and discussed a bit about matrix mathematics. We built a 3D model of a cube, and then created shader programs to use a light source to render the cube with shading. We also animated the cube and added a floor grid. Lastly, we added a feature that highlights the cube when the user is looking at it.
Along the way, we enjoyed good discussions of 3D geometry, OpenGL, shaders, matrix math for 3D perspective ...
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