A cross platform C++ OpenGL project running on PC and Raspberry Pi | 2025
For BUAS block B we needed to recreate a metal gear solid style game in OpenGL on the
raspberry pi (4) and PC
I chose to go deeper in some techniques like parallax adjusted cubemap reflections and
particles.
One of the main features I added to the project was parallax adjusted cubemap
reflections,
I added reflectionprobes to the level which took cubemap pictures on level load.
I then displayed these using a shader which mapped the cubemaps with perspective
adjustement
to make them look more real.
It works by moving the cubemap through the surface and doing a ray box intersection to
sample the cubemap, this makes it look like the room is behind the surface and then i
flip
the map accordingly
I also wanted (loads) of particles in my game, so I added support for particles.
I made the particles run on the GPU as a compute shader and draw them instanced, This
allows me to keep the data on the GPU saving long transfer times and runs very fast.
However I ran into a big problem with this on the pi, because the raspberry pi does not
support data buffers
for compute shaders,
To solve this I put all the data into a single channel texture
which allowed me to also run this on the PI
I also added water to my game, using perlin noise generated geometry and a depth based shader.
Source