libMesh::TriangleInterface::PolygonHole Class Reference

#include <mesh_triangle_holes.h>

Inheritance diagram for libMesh::TriangleInterface::PolygonHole:

Public Member Functions

 PolygonHole (const Point &center, Real radius, unsigned int n_points)
virtual unsigned int n_points () const override
virtual Point point (const unsigned int n) const override
virtual Point inside () const override

Private Attributes

Point _center
Real _radius
unsigned int _n_points

Detailed Description

A concrete instantiation of the Hole class that describes polygonal (triangular, square, pentagonal, ...) holes.

Definition at line 81 of file mesh_triangle_holes.h.

Constructor & Destructor Documentation

◆ PolygonHole()

libMesh::TriangleInterface::PolygonHole::PolygonHole ( const Point center,
Real  radius,
unsigned int  n_points 

Constructor specifying the center, radius, and number of points which comprise the hole. The points will all lie on a circle of radius r.

Definition at line 32 of file mesh_triangle_holes.C.

Member Function Documentation

◆ inside()

Point libMesh::TriangleInterface::PolygonHole::inside ( ) const

Return an (arbitrary) point which lies inside the hole.

Implements libMesh::TriangleInterface::Hole.

Definition at line 58 of file mesh_triangle_holes.C.

59 {
60  // The center of the hole is definitely inside.
61  return _center;
62 }

◆ n_points()

unsigned int libMesh::TriangleInterface::PolygonHole::n_points ( ) const

The number of geometric points which define the hole.

Implements libMesh::TriangleInterface::Hole.

Definition at line 41 of file mesh_triangle_holes.C.

42 {
43  return _n_points;
44 }

◆ point()

Point libMesh::TriangleInterface::PolygonHole::point ( const unsigned int  n) const

Return the nth point defining the hole.

Implements libMesh::TriangleInterface::Hole.

Definition at line 46 of file mesh_triangle_holes.C.

References libMesh::pi, and libMesh::Real.

47 {
48  // The nth point lies at the angle theta = 2 * pi * n / _n_points
49  const Real theta = static_cast<Real>(n) * 2.0 * libMesh::pi / static_cast<Real>(_n_points);
51  return Point(_center(0) + _radius*std::cos(theta), // x=r*cos(theta)
52  _center(1) + _radius*std::sin(theta), // y=r*sin(theta)
53  0.);
54 }
const Real pi
Definition: libmesh.h:233

Member Data Documentation

◆ _center

Point libMesh::TriangleInterface::PolygonHole::_center

(x,y) location of the center of the hole

Definition at line 101 of file mesh_triangle_holes.h.

◆ _n_points

unsigned int libMesh::TriangleInterface::PolygonHole::_n_points

number of points used to describe the hole. The actual points can be generated knowing the center and radius. For example, n_points=3 would generate a triangular hole.

Definition at line 113 of file mesh_triangle_holes.h.

◆ _radius

Real libMesh::TriangleInterface::PolygonHole::_radius

circular hole radius

Definition at line 106 of file mesh_triangle_holes.h.

The documentation for this class was generated from the following files: