Fiber::LocalFromWorldPoint Class Reference

Use this class to compute a local cell index and fragment ID (if neccessary) of any coordinate field on a given slice and grid. More...

#include <LocalFromWorldPoint.hpp>

List of all members.

Classes

• class BBSelectorBase

  Method used to select the next candidate when doing a search in the point in the fragments.
  

• class BBSelectorMemoryTree

  Select fragment candidates out of all the candidates by doing a query into the KDTree and provide a method to step through the candidates. More...
  

• class FindCell

  Base class for finding the cell containing the point in a fragment. More...
  

• class HexaHedralCellNewton

  Finds a cell containing a world point by using the UniGridMapper. More...
  

• struct MyIterator

  Iterator over fragments.
  

Public Member Functions

• bool rayTriangleIntersect (const point orig, const tvector dir, const point vert0, const point vert1, const point vert2, double &t, double &u, double &v, point &intersection)
• bool rayQuaderIntersect (const point orig, const tvector dir, Vertexlist_t &QV, double &t, double &u, double &v, point &intersection, bivector &normal, unsigned &face)
• LocalFromWorldPoint (Slice &SourceSliceP, const RefPtr< Grid > &SourceGridP, const string &Gridname, const RefPtr< Field > &SourceCoordsP, double res_scale=1.0, double prec_scale=0.1)

  Constructor does some initialization, like iterating over the fragments to build a KDTree if not already found in the Field's intercube and storing fragmentids and bounding boxes back into the grids' bundle.
  

• ~LocalFromWorldPoint ()

  Destructor.
  

• bool get (const point position, pair< point, string > &data)

  Get the local index coordinates of a world point and the fragment id of the fragment it is contained in.
  

• void setBlockBoundaryEpsilon (const double block_epsilonP)
• int numberOfBordersOfCell (const pair< point, string > localdata, int &hint1, int &hint2)

  returns the number of bordersurfaces of the given cell
  

• bool getBorderIntersectionNormal (const point worldposition, const pair< point, string > localpoint, const tvector direction, point &intersection, bivector &normal)

  Some helper function that returns the point where the cell is left and the normal of the cells face.
  

Public Attributes

• FixedArray< FixedArray< int, 3 >, 12 > Facelist
• double block_epsilon
• double res_scale
• double prec_scale
• int MaxListSize

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Detailed Description

Use this class to compute a local cell index and fragment ID (if neccessary) of any coordinate field on a given slice and grid.

The reason this is encapulated in a class rather in a function is that there are several things done in the constructor once for initialisation once thus speeding up the get function. Also some inner classes are encapsulated and hidden for the user.

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Constructor & Destructor Documentation

Fiber::LocalFromWorldPoint::LocalFromWorldPoint	(	Slice &	SourceSliceP,
		const RefPtr< Grid > &	SourceGridP,
		const string &	Gridname,
		const RefPtr< Field > &	SourceCoordsP,
		double	res_scale = 1.0,
		double	prec_scale = 0.1
	)

Constructor does some initialization, like iterating over the fragments to build a KDTree if not already found in the Field's intercube and storing fragmentids and bounding boxes back into the grids' bundle.

UniGridMappers are stored for each fragment in a separate grid object either at the provided slice or at the provided uniGrid pointer.

Parameters:

	sliceP	actual time slice
	SourceGridP	the grid of the coordinates
	SourceCoordsP	the field that contains the coordinates

References Fiber::PointSearch::FragmentBoxes.

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Member Function Documentation

bool Fiber::LocalFromWorldPoint::get	(	const point	position,
		pair< point, string > &	data
	)

Get the local index coordinates of a world point and the fragment id of the fragment it is contained in.

Parameters:

	position	world point
	data	return float index (local position) and fragment name, which can be used to create a FragmentID object

Returns:

true if a point can be found, false if the world point is not contained in the coordinate space of the data. In the point (0,0,0) and an emtpy string if returned via the pair.

Todo:

should just return a pair<> here as return value, and rather use a fragment ID itself instead of a string

CHECK WHETHER PARAMETERS REALLY NEED TO BE COPIED HERE

bool Fiber::LocalFromWorldPoint::getBorderIntersectionNormal	(	const point	worldposition,
		const pair< point, string >	localpoint,
		const tvector	direction,
		point &	intersection,
		bivector &	normal
	)

Some helper function that returns the point where the cell is left and the normal of the cells face.

A direction and a position (in world and local positions).

Todo:

CHECK WHETHER PARAMETERS REALLY NEED TO BE COPIED HERE

References numberOfBordersOfCell().

int Fiber::LocalFromWorldPoint::numberOfBordersOfCell	(	const pair< point, string >	localdata,
		int &	hint1,
		int &	hint2
	)

returns the number of bordersurfaces of the given cell

Todo:

CHECK WHETHER PARAMETERS REALLY NEED TO BE COPIED HERE

Referenced by getBorderIntersectionNormal().