PUBLIC

SurfaceNearestC::SurfaceNearestC(void) SurfaceNearestC::SurfaceNearestC(SurfaceC &) SurfaceNearestC::SurfaceNearestC(SurfaceC &,const OrthoProjection3to2dC,const Point2dC,const Index2dC) SurfaceNearestC::SurfaceNearestC(const SurfaceNearestC &) SurfaceNearestC::operator=(const SurfaceNearestC &) SurfaceNearestC::NearestPoint(const Vector3dC) SurfaceNearestC::NearestPoint(const Vector3dC,const RealT) SurfaceNearestC::NearestPoint(const Vector3dC,const IntT) SurfaceNearestC::SetupElementBased(void) SurfaceNearestC::SetupElementBased(const OrthoProjection3to2dC,const Point2dC,const Index2dC) SurfaceNearestC::FitPlane(void) SurfaceNearestC::InsertElements(void) SurfaceNearestC::MinMaxElement(ElementC &,Index2dC &,Index2dC &) SurfaceNearestC::FillBuckets(ElementC &,Index2dC &,Index2dC &) SurfaceNearestC::NearestPoint(const Vector3dC,const Index2dC,const IntT) SurfaceNearestC::UnmarkElements(const Index2dC,const IntT)

SurfaceNearestC
include	"amma/SurfNear.hh"
User Level:	Default
Library:	surfnear
Example:	cri.cc
Section:	default.Adrian Hilton
In Scope:	std

Comments:
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Bucket3to2dC bucket;

lookup table for element based nn

SurfaceC temp_surface;

reqd for default const

SurfaceC & surface;

SurfaceC surface; reference to this surface (not & for default constructor(

const IntT mark;

const IntT mark = 1;

Use element once only in nearest point calculation mark/unmark elements 1/0 void SetupNodeBased(); Nearest Neighbours based on surface nodes NearestC nearest_node;

SurfaceNearestC()

empty

SurfaceNearestC(SurfaceC & s)

Construct a structure for Nearest Point Computation Default parameters: plane = (x,y) du = minimum edge length n = sqrt(no. of elements)

SurfaceNearestC(SurfaceC & s,const OrthoProjection3to2dC plane,const Point2dC du,const Index2dC n)

Construct a structure for Nearest Point Computation 2D reference plane 'plane' grid size 'n' in 2D plane grid resolution 'du' in 2D plane

SurfaceNearestC(const SurfaceNearestC & nn)

copy

const SurfaceNearestC operator=(const SurfaceNearestC & nn)

assignment

SurfaceNearestPointC NearestPoint(const Vector3dC v)

Nearest point on surface to v

SurfaceNearestPointC NearestPoint(const Vector3dC v,const RealT dmax)

Local nearest point up to distnace dmax from v

SurfaceNearestPointC NearestPoint(const Vector3dC v,const IntT nmax)

Local nearest point up to nmax buckets from v

void SetupElementBased()

Nearest Neighbours based on surface elements Default parameters: plane = best fit plane to node positions du = minimum edge length n = sqrt(no. of elements)

void SetupElementBased(const OrthoProjection3to2dC plane,const Point2dC du,const Index2dC n)

Setup with specified parameters

PlanePVV3dC FitPlane()

Best fit plane to element nodes (1st 2 eigenvectors of cov.)

void InsertElements()

insert pointers to elem in all overlapped buckets in ref plane

void MinMaxElement(ElementC & elem,Index2dC & imin,Index2dC & imax)

bounding box of element in 2D ref. plane

void FillBuckets(ElementC & elem,Index2dC & imin,Index2dC & imax)

insert pointer to elem in all buckets in square imin-> imax (inclusive) SurfaceNearestPointT NearestPoint(const Index2dC i); nearest point in bucket i

SurfaceNearestPointC NearestPoint(const Vector3dC v,const Index2dC ind,const IntT i)

nearest point in bucket i +/- i

void UnmarkElements(const Index2dC i,const IntT n)

unmark all elements in bucket i +/- n-1