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.

                                                                      :
  _center(center),
  _radius(radius),
  _n_points(n_points_in)
{}

Member Function Documentation

inside()

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

overridevirtual

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

Implements libMesh::TriangleInterface::Hole.

Definition at line 58 of file mesh_triangle_holes.C.

{
  // The center of the hole is definitely inside.
  return _center;
}

n_points()

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

overridevirtual

The number of geometric points which define the hole.

Implements libMesh::TriangleInterface::Hole.

Definition at line 41 of file mesh_triangle_holes.C.

{
  return _n_points;
}

point()

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

overridevirtual

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.

{
  // The nth point lies at the angle theta = 2 * pi * n / _n_points
  const Real theta = static_cast<Real>(n) * 2.0 * libMesh::pi / static_cast<Real>(_n_points);

  return Point(_center(0) + _radius*std::cos(theta), // x=r*cos(theta)
               _center(1) + _radius*std::sin(theta), // y=r*sin(theta)
               0.);
}

Member Data Documentation

_center

Point libMesh::TriangleInterface::PolygonHole::_center

private

(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

private

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

private

circular hole radius

Definition at line 106 of file mesh_triangle_holes.h.

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

• mesh_triangle_holes.h
• mesh_triangle_holes.C