CGAL::Surface_mesh_parameterization::Square_border_parameterizer_3< TriangleMesh_ > Class Template Reference

#include <CGAL/Surface_mesh_parameterization/Square_border_parameterizer_3.h>

Inherited by CGAL::Surface_mesh_parameterization::Square_border_arc_length_parameterizer_3< TriangleMesh_ >, and CGAL::Surface_mesh_parameterization::Square_border_uniform_parameterizer_3< TriangleMesh_ >.

Definition

This is the base class of strategies that parameterize the border of a 3D surface onto a square.

Square_border_parameterizer_3 is a pure virtual class, thus cannot be instantiated. It implements most of the algorithm. Subclasses only have to implement the function compute_edge_length() to compute a segment's length.

The user can provide four vertices on the border of the mesh, which will be mapped to the four corners of the square.

Attention

The square border parameterizer may create degenerate faces in the parameterization: if an input border vertex has valence 1 and if it is mapped to the same edge of the square as its two adjacent (border) vertices, for example.

Implementation note: To simplify the implementation, the border parameterizer knows only the TriangleMesh class and does not know the parameterization algorithm requirements or the kind of sparse linear system used.

Is Model Of:

Parameterizer_3

Template Parameters

TriangleMesh_

must be a model of FaceGraph.

See also

CGAL::Surface_mesh_parameterization::Square_border_uniform_parameterizer_3<TriangleMesh>

CGAL::Surface_mesh_parameterization::Square_border_arc_length_parameterizer_3<TriangleMesh>

Public Types
typedef TriangleMesh_	Triangle_mesh
	Triangle mesh type.
typedef boost::graph_traits< Triangle_mesh >::vertex_descriptor	vertex_descriptor
	Mesh vertex type.
typedef boost::graph_traits< Triangle_mesh >::halfedge_descriptor	halfedge_descriptor
	Mesh halfedge type.

Public Member Functions
template<typename VertexUVMap , typename VertexIndexMap , typename VertexParameterizedMap >
Error_code	parameterize (const Triangle_mesh &mesh, halfedge_descriptor bhd, VertexUVMap uvmap, VertexIndexMap, VertexParameterizedMap vpmap)
	assigns to the vertices of the border of the mesh a 2D position (i.e. a (u,v) pair) on the border's shape. More...
bool	is_border_convex () const
	indicates if the border's shape is convex.
	Square_border_parameterizer_3 ()
	Constructor.
	Square_border_parameterizer_3 (vertex_descriptor v0, vertex_descriptor v1, vertex_descriptor v2, vertex_descriptor v3)
	Constructor with user-defined corners: the user provides four vertices of the border of the mesh, which will be parameterized to the corners of the square. More...

Constructor & Destructor Documentation

Square_border_parameterizer_3()

template<class TriangleMesh_ >

CGAL::Surface_mesh_parameterization::Square_border_parameterizer_3< TriangleMesh_ >::Square_border_parameterizer_3	(	vertex_descriptor	v0,
		vertex_descriptor	v1,
		vertex_descriptor	v2,
		vertex_descriptor	v3
	)

Constructor with user-defined corners: the user provides four vertices of the border of the mesh, which will be parameterized to the corners of the square.

Precondition

The given vertices must be on the border.

Member Function Documentation

parameterize()

template<class TriangleMesh_ >

template<typename VertexUVMap , typename VertexIndexMap , typename VertexParameterizedMap >

Error_code CGAL::Surface_mesh_parameterization::Square_border_parameterizer_3< TriangleMesh_ >::parameterize	(	const Triangle_mesh &	mesh,
		halfedge_descriptor	bhd,
		VertexUVMap	uvmap,
		VertexIndexMap	,
		VertexParameterizedMap	vpmap
	)

assigns to the vertices of the border of the mesh a 2D position (i.e. a (u,v) pair) on the border's shape.

Mark them as parameterized.

Template Parameters

VertexUVmap	must be a model of ReadWritePropertyMap with boost::graph_traits<Triangle_mesh>::vertex_descriptor as key type and Point_2 (type deduced from Triangle_mesh using Kernel_traits) as value type.
VertexIndexMap	must be a model of ReadablePropertyMap with boost::graph_traits<Triangle_mesh>::vertex_descriptor as key type and a unique integer as value type.
VertexParameterizedMap	must be a model of ReadWritePropertyMap with boost::graph_traits<Triangle_mesh>::vertex_descriptor as key type and a Boolean as value type.

Parameters

mesh	a triangulated surface.
bhd	a halfedge descriptor on the boundary of mesh.
uvmap	an instanciation of the class VertexUVmap.
vpmap	an instanciation of the class VertexParameterizedMap.

Precondition

mesh must be a triangular mesh.

The vertices must be indexed (vimap must be initialized).