GetPlacement Concept Reference

Definition

The concept GetPlacement describes the requirements for the policy function object which gets the collapse placement of an edge, that is, the new position of the vertex that remains after a halfedge-collapse operation.

The placement returned is a std::optional value (i.e., it can be absent). An absent result indicates that the edge should not be collapsed. This could be the result of a computational limitation (such as an overflow), or can be intentionally returned to prevent the edge from being collapsed.

Refines

DefaultConstructible

CopyConstructible

Has models

CGAL::Surface_mesh_simplification::Midpoint_placement<TriangleMesh>

CGAL::Surface_mesh_simplification::LindstromTurk_placement<TriangleMesh>

CGAL::Surface_mesh_simplification::GarlandHeckbert_policies<TriangleMesh, GeomTraits>

CGAL::Surface_mesh_simplification::Bounded_normal_change_placement<Placement>

CGAL::Surface_mesh_simplification::Constrained_placement<Placement>

Public Types
typedef CGAL::Surface_mesh_simplification::Edge_profile	Edge_profile
	The class Edge_profile regroups useful information about an edge, such as its incident vertices and faces.

Operations
std::optional< Edge_profile::Point >	operator() (const Edge_profile &profile) const
	Computes and returns the placement, that is, the position of the vertex which replaces the collapsing edge (represented by its profile).