cylindermodelling

Cylindermodelling is a modelling approach in computer-aided design and computer graphics that represents complex shapes as assemblies of cylindrical primitives. Each cylinder is defined by an axis, a radius, and a finite extent along that axis. Objects are built by placing, orienting, and combining multiple cylinders, with a strength for rod-like, pipe-like, or limb-like structures.

The typical workflow has fitting and assembly. In fitting, data from point clouds or meshes are approximated by cylinders using least-squares optimization or robust methods such as RANSAC to reduce outliers. In assembly, cylinders are joined with constructive solid geometry (CSG) operations or aligned to form a coherent surface.

Applications include digital reconstruction of mechanical components, character rigging and animation, and anatomical or vascular modelling where cylindrical segments approximate bones or vessels. Cylindermodelling also supports procedural generation and rapid prototyping through a compact, editable representation.

Advantages include compact data, easy part-level editing, and efficient collision handling. Limitations arise when representing highly curved or irregular forms, often requiring many cylinders or introducing seams. The approach trades geometric accuracy for simplicity and editability, sometimes necessitating mesh refinement afterwards.

Cylindermodelling sits within primitive-based modelling, alongside spheres, cones, and boxes, and interacts with broader parametric and mesh-based workflows. It is commonly used as an intermediate representation or a production-friendly starting point in design, reconstruction, and animation pipelines.