Module simplify 

Mesh simplification by quadric-error edge collapse.

simplify shrinks a mesh toward SimplifyOptions::target_triangles by repeatedly collapsing the edge whose collapse adds the least quadric error (Garland-Heckbert): each vertex holds the sum of the squared distances to its incident face planes, an edge collapses to the point minimizing the summed quadrics, and the vertex quadrics merge. Boundary vertices stay put when SimplifyOptions::preserve_boundary is set, so open rims keep their shape. Collapses that would break the link condition or fold the fan are skipped. The whole plan is computed on working copies first and committed through one Transaction, which keeps the call atomic under sweep: either every collapse lands or nothing does.

UVs (Mesh::uvs) follow: a survivor takes the UV at its new position’s parameter along the collapsed edge. The quadrics ignore UVs, so textures can stretch. With preserve_boundary, seams (which are boundaries) stay exactly as they are.

Structs

SimplifyOptions

Options for simplify.

SimplifyOptionsBuilder

Builder for SimplifyOptions.

SimplifyReport

Outcome of simplify.

Functions

simplify

Shrinks the mesh toward options.target_triangles by quadric-error edge collapses (see the module docs). Boundary vertices stay put when preserve_boundary is set. Stops early when no valid collapse is left, which can leave more triangles than the target on meshes with locked or non-manifold edges.