Loop Subdivision: subdivide triangular meshes

API function: algo.loopSubdivMesh.

Considering a surfacic mesh solely composed of triangles (ie, no quadrilaterals), this function applies the one-step Loop Subdivision algorithm in which each triangle is subdivided into four smaller ones. Vertices are positioned to create a smooth subdivision surface. This function is applied recursively D times, where D is the subdivision depth (see parameters).

A low-poly mesh	Loop Subdivision (depth D=1)	Loop Subdivision (depth D=2)

Warning

If the mesh has non-triangular surfacic elements (i.e., quadrilaterals), the function will not do anything. See algo.triangularize.

Sharp edges

The subdivision preserves edge sharpness along the surface border: after topological subdivision, vertices are placed so as to preserve edge sharpness (following section 2.1 of this paper).

Sharp border edges	D=1	D=2

Parameters

Occurrences

List of occurrences to process.

Depth

The subdivision depth. Determines the number of recursive subdivision steps applied to each triangle.