kha-sdf

Figuring out Signed Distance Field rendering with Kha

Signed Distance Function are cool. Check out Inigo Quilez's articles on them. That's what most of this is based on. I did get stuck with some of the more general descriptions given, so I ended up doing a rewrite based on 9bitscience's article and example code. In any case, this is an implementation in haxe and kha, for learning purposes.

What I Learned

• Repeating the exact some object on a grid is super cheap
• Raymarching SDFs is not the same as raymarching terrain
• SDF Raymarching quickly gets slower with unique objects ** Edges are the real enemy in this case
• Lowering the resolution can drastically improve performance

Running

Install kode studio, open the folder as a project, hit run. Hopefully. I wasn't exactly aiming for a reproducible build here.

Future plans

Voxels. I'll probably be borrowing a lot of ideas from VoxelQuest and Dreams. I'm thinking of using voxels for the rendering, but storing the data as SDF edits to a voxel field. Which is a lot like how Dreams works, but it is a really awesome approach so can you really blame me?

Screenshots