A summary of the process I used to generate 3D meshes that wrap around the surface of other 3D meshes using path tessellation and geodesic walking

Casey Primozic

A developer details how they built a system to wrap procedurally generated 2D path meshes around arbitrary 3D mesh surfaces using geodesic walking algorithms. The process involves: generating intricate 2D paths with AABB tree-based collision detection, tessellating them into triangles using the Rust lyon crate, mapping vertices onto a 3D mesh surface via geodesic walks (using the C++ geometry-central library), and extruding the result along vertex normals. To handle distortion from long geodesic walks, a graph traversal approach is used so walks start from nearby already-mapped vertices. The whole pipeline runs in the browser via two WebAssembly modules (one from Rust, one from C++) glued together with TypeScript, running in a web worker to avoid blocking the main thread, with final output fed into Three.JS BufferGeometry.

Wrapping Meshes With Geodesic Walks