inviwo::discretedata::Connectivity Class Reference

Basis interface of all connectivity types. More...

#include <connectivity.h>

Inheritance diagram for inviwo::discretedata::Connectivity:

Public Member Functions
	Connectivity (GridPrimitive gridDimension)
GridPrimitive	getDimension () const
	Returns the maximal dimension of the grid.
virtual ind	getNumElements (GridPrimitive elementType) const
	Return the number of elements of the given type. More...
virtual void	getConnections (std::vector< ind > &result, ind index, GridPrimitive from, GridPrimitive to, bool isPosition=false) const =0
	Get the map from one element to another E.g. cell to its vertices, vertex to its neighbors, vertex to connected faces. More...
ElementRange	all (GridPrimitive dim) const
	Range of all elements to iterate over. More...
virtual CellType	getCellType (GridPrimitive dim, ind index) const
	Get the cell type (i.e. triangle, quad...; tetrahedron, voxel...) More...
virtual CellType	getCellType (ElementIterator &element) const
	Get the cell type (i.e. triangle, quad...; tetrahedron, voxel...) More...

Protected Attributes
GridPrimitive	gridDimension_
	Highest dimension of GridPrimitives.
std::vector< ind >	numGridPrimitives_
	Saves the known number of primitves.

Detailed Description

Basis interface of all connectivity types.

The connectivity between coordinates creates a mesh, a graph, a cell complex, or some other structure. It joins coordinates to a larger entity and puts them in a neighborhood relation.

A connectivity can define several neighborhood relations. For example, a uniform grid would have 0D vertices, 1D grid edges, 2D grid faces, and 3D grid cells/voxels. The connectivity defines these neighborhood relations and allows iterating over them.

This refers to the 'topological space' in Vector-Bundle Classes Form Powerful Tool for Scientific Visualization, Butler and Bryson, 1992.

Connectivity and Coordinates jointly define the manifold in the above paper.

Author

Tino Weinkauf and Anke Friederici

Member Function Documentation

all()

ElementRange inviwo::discretedata::Connectivity::all

(

GridPrimitive

dim

)

const

Range of all elements to iterate over.

Parameters

dim	Dimension to return the elements of

getCellType() [1/2]

CellType inviwo::discretedata::Connectivity::getCellType ( GridPrimitive  dim, ind  index  ) const

virtual

Get the cell type (i.e. triangle, quad...; tetrahedron, voxel...)

Parameters

dim	Dimension of element (edge, face, volume...)
index	Index of respective element type

Reimplemented in inviwo::discretedata::StructuredGrid.

getCellType() [2/2]

CellType inviwo::discretedata::Connectivity::getCellType ( ElementIterator &  element ) const

virtual

Get the cell type (i.e. triangle, quad...; tetrahedron, voxel...)

Parameters

element

Element to get measure of

getConnections()

virtual void inviwo::discretedata::Connectivity::getConnections ( std::vector< ind > &  result, ind  index, GridPrimitive  from, GridPrimitive  to, bool  isPosition = false  ) const

pure virtual

Get the map from one element to another E.g. cell to its vertices, vertex to its neighbors, vertex to connected faces.

Parameters

result	All connected indices in dimension 'to'
index	Index of element in dimension 'from'
from	Dimension the index lives in
to	Dimension the result lives in
isPosition

Implemented in inviwo::discretedata::PeriodicGrid, and inviwo::discretedata::StructuredGrid.

getNumElements()

ind inviwo::discretedata::Connectivity::getNumElements ( GridPrimitive  elementType ) const

virtual

Return the number of elements of the given type.

Parameters

elementType

Type to get number of

Returns

Number of elements

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

• connectivity.h
• connectivity.cpp