GEO::MeshElements Class Reference

Base class for mesh elements. More...

#include <geogram/mesh/mesh.h>

Inheritance diagram for GEO::MeshElements:

Public Member Functions
virtual void	delete_elements (vector< index_t > &to_delete, bool remove_isolated_vertices=true)=0
	Deletes a set of elements. More...
virtual void	permute_elements (vector< index_t > &permutation)=0
	Applies a permutation to the elements and their attributes. More...
virtual void	clear (bool keep_attributes=true, bool keep_memory=false)=0
	Removes all the elements and attributes. More...
virtual void	pop ()=0
	Removes the last element.

Static Protected Member Functions
static bool	has_non_zero (const GEO::vector< index_t > &I)
	Tests whether a vector contains a non-zero value. More...

Detailed Description

Base class for mesh elements.

Mesh elements can be created / manipulated independantly, in contrast with sub-elements that cannot. Mesh elements are vertices, facets and cells.

Definition at line 243 of file mesh.h.

Member Function Documentation

clear()

virtual void GEO::MeshElements::clear ( bool  keep_attributes = true, bool  keep_memory = false  )

pure virtual

Removes all the elements and attributes.

Parameters

[in]	keep_attributes	if true, then all the existing attribute names / bindings are kept (but they are cleared). If false, they are destroyed.
[in]	keep_memory	if true, then memory is kept and can be reused by subsequent mesh element creations.

Implemented in GEO::MeshCells, GEO::MeshFacets, GEO::MeshEdges, and GEO::MeshVertices.

delete_elements()

virtual void GEO::MeshElements::delete_elements ( vector< index_t > &  to_delete, bool  remove_isolated_vertices = true  )

pure virtual

Deletes a set of elements.

Parameters

[in]	to_delete	a vector of size nb(). If to_delete[e] is different from 0, then element e will be destroyed, else it will be kept. On exit, to_delete is modified (it is used for internal bookkeeping).
[in]	remove_isolated_vertices	if true, then the vertices that are no longer incident to any element are deleted.

Implemented in GEO::MeshCells, GEO::MeshFacets, GEO::MeshEdges, and GEO::MeshVertices.

has_non_zero()

static bool GEO::MeshElements::has_non_zero ( const GEO::vector< index_t > &  I )

inlinestaticprotected

Tests whether a vector contains a non-zero value.

This function is used internally by delete_elements()

Parameters

[in]

I

a vector of signed integers

Return values

true	if I contains at least a non-zero value
false	otherwise

Definition at line 302 of file mesh.h.

permute_elements()

virtual void GEO::MeshElements::permute_elements ( vector< index_t > &  permutation )

pure virtual

Applies a permutation to the elements and their attributes.

On exit, permutation is modified (used for internal bookkeeping). Applying a permutation permutation is equivalent to:

for(i=0; i<permutation.size(); i++) {
   data2[i] = data[permutation[i]]
}
data = data2 ;

Implemented in GEO::MeshCells, GEO::MeshFacets, GEO::MeshEdges, and GEO::MeshVertices.

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

• geogram/mesh/mesh.h