A simple implementation of the voxel engine used in the comanche video games, also called VoxelSpace.

This was heavily inspired by s-make's github project VoxelSpace.

The difference is that the target is a small arm9 portable game console called the pocketGo, seriously underpowered. And the language is rust.

See the docker image with the arm9 toolchain and a modern version of rust that i use to build the sources.

Benchmark for the version as of this commit (1024x1024 texture and height map, 320x240 screen):

• i7 laptop: 45.2ms / draw debug, 3.2ms / draw release
• pocketGo: 50ms / draw release

The texture is way to large for the pocketGo, but the goal is to push it to its limits. I tried to reduce the memory footprint by using the a colormap (8bit palette) but in the end it was a little bit slower, probably because the full texture is already small enough to fit in caches.

Todo:

• improve performance:
  • remove / and * from the inner loop
  • Use a smaller scale image for the heightmap/texture at a distance
• add texture interpolation for the ground
• fix bugs

I use SDL1 since SDL2 is not supported by the PocketGo. I made a fork of the brson/rust-sdl crate to add ARM support.