Package org.apache.commons.geometry.euclidean.threed.shape

Class Sphere.SphereMeshApproximationBuilder

java.lang.Object

org.apache.commons.geometry.euclidean.threed.shape.Sphere.SphereMeshApproximationBuilder

Enclosing class:

Sphere

private static final class Sphere.SphereMeshApproximationBuilder
extends Object

Internal class used to construct geodesic mesh sphere approximations. The class begins with an octahedron inscribed in the sphere and then subdivides each triangular face a specified number of times.

Field Summary

Fields

Modifier and Type	Field	Description
private final SimpleTriangleMesh.Builder	builder	Mesh builder object.
private final Sphere	sphere	The sphere that an approximation is being created for.
private final int	subdivisions	The number of triangular subdivisions to use.

Constructor Summary

Constructors

Constructor	Description
SphereMeshApproximationBuilder(Sphere sphere, int subdivisions)	Construct a new builder for creating a mesh approximation of the given sphere.

Method Summary

Modifier and Type	Method	Description
private void	addSubdivided(Vector3D p1, Vector3D p2, Vector3D p3, int level)	Recursively subdivide and add triangular faces between the given outer boundary points.
SimpleTriangleMesh	build()	Build the mesh approximation of the configured sphere.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

sphere

private final Sphere sphere

The sphere that an approximation is being created for.

subdivisions

private final int subdivisions

The number of triangular subdivisions to use.

builder

private final SimpleTriangleMesh.Builder builder

Mesh builder object.

Constructor Details

SphereMeshApproximationBuilder

SphereMeshApproximationBuilder(Sphere sphere,
 int subdivisions)

Construct a new builder for creating a mesh approximation of the given sphere.

Parameters:

sphere - the sphere to create an approximation of

subdivisions - the number of triangle subdivisions to use in mesh creation

Method Details

build

public SimpleTriangleMesh build()

Build the mesh approximation of the configured sphere.

Returns:

the mesh approximation of the configured sphere

addSubdivided

private void addSubdivided(Vector3D p1,
 Vector3D p2,
 Vector3D p3,
 int level)

Recursively subdivide and add triangular faces between the given outer boundary points.

Parameters:

p1 - first point

p2 - second point

p3 - third point

level - recursion level; counts up