org.jcae.mesh.amibe.patch
Class Calculus2D

java.lang.Object
  org.jcae.mesh.amibe.patch.Calculus2D

All Implemented Interfaces:

Calculus

public class Calculus2D
extends java.lang.Object
implements Calculus

Distance computations in 2D Euclidian space. This class is called from BasicMesh but may also be used if amibe is extended to mesh 2D surfaces.

Constructor Summary

Calculus2D(Mesh2D m)
Constructor.

Method Summary

double	distance(Vertex2D start, Vertex2D end) Returns the 2D distance to another Vertex2D instance.
double	distance2(Vertex2D start, Vertex2D end, Metric2D m2) Returns square distance to another Vertex2D instance.
double[]	getBounds2D(Vertex2D vm) Returns bounds of unit ellipse centered at a point.
double	length(VirtualHalfEdge2D ot) Returns the 2D length of an edge.

Methods inherited from class java.lang.Object

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

Constructor Detail

Calculus2D

public Calculus2D(Mesh2D m)

Constructor.

Parameters:

m - the Mesh2D being modified.

Method Detail

distance2

public double distance2(Vertex2D start,
                        Vertex2D end,
                        Metric2D m2)

Returns square distance to another Vertex2D instance.

Specified by:

distance2 in interface Calculus

Parameters:

start - first node

end - end node

m2 - metrics (unused)

Returns:

square distance between the two nodes.

distance

public double distance(Vertex2D start,
                       Vertex2D end)

Returns the 2D distance to another Vertex2D instance.

Specified by:

distance in interface Calculus

Parameters:

start - the first node

end - the node to which distance is computed.

Returns:

the distance between the two nodes.

length

public double length(VirtualHalfEdge2D ot)

Returns the 2D length of an edge.

Specified by:

length in interface Calculus

Parameters:

ot - the edge being evaluated

Returns:

the distance between its two endpoints.

getBounds2D

public double[] getBounds2D(Vertex2D vm)

Returns bounds of unit ellipse centered at a point. This routine returns a double array which represents enclosing bounding box of unit ellipse. This method is used by KdTree.getNearestVertex(org.jcae.mesh.amibe.ds.Mesh, org.jcae.mesh.amibe.ds.Vertex); if an octant does not intersect this bounding box, it does also not intersect unit ellipse.

Specified by:

getBounds2D in interface Calculus

Parameters:

vm - the vertex on which metrics is evaluated

Returns:

bounding box of unit ellipse