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MeshTri3.h
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Wed, Sep 4, 01:13
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text/x-c++
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Fri, Sep 6, 01:13 (1 d, 23 h)
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rGOOSEFEM GooseFEM
MeshTri3.h
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/**
Generate simple meshes of 3-noded triangular elements in 2d (GooseFEM::Mesh::ElementType::Tri3).
\file MeshTri3.h
\copyright Copyright 2017. Tom de Geus. All rights reserved.
\license This project is released under the GNU Public License (GPLv3).
*/
#ifndef GOOSEFEM_MESHTRI3_H
#define GOOSEFEM_MESHTRI3_H
#include "config.h"
#include "Mesh.h"
namespace
GooseFEM
{
namespace
Mesh
{
/**
Simple meshes of and mesh operations for triangular elements of type ElementType::Tri3.
*/
namespace
Tri3
{
/**
Regular grid of squares, with each square cut into two triangular elements.
*/
class
Regular
:
public
RegularBase2d
{
public:
/**
Constructor.
\param nelx Number of elements in x-direction.
\param nely Number of elements in y-direction.
\param h Edge-size (of the squares, and thus of two of three element-edges).
*/
Regular
(
size_t
nelx
,
size_t
nely
,
double
h
=
1.
);
ElementType
getElementType
()
const
override
;
xt
::
xtensor
<
double
,
2
>
coor
()
const
override
;
xt
::
xtensor
<
size_t
,
2
>
conn
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesBottomEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesTopEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesLeftEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesRightEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesBottomOpenEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesTopOpenEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesLeftOpenEdge
()
const
override
;
xt
::
xtensor
<
size_t
,
1
>
nodesRightOpenEdge
()
const
override
;
size_t
nodesBottomLeftCorner
()
const
override
;
size_t
nodesBottomRightCorner
()
const
override
;
size_t
nodesTopLeftCorner
()
const
override
;
size_t
nodesTopRightCorner
()
const
override
;
};
// read / set the orientation (-1/+1) of all triangles
/**
Read the orientation of a mesh of triangular elements of type ElementType::Tri3.
\param coor Nodal coordinates [nnode, ndim].
\param conn Connectivity [nelem, nne].
\return Orientation (-1 or +1) per element [nelem].
*/
inline
xt
::
xtensor
<
int
,
1
>
getOrientation
(
const
xt
::
xtensor
<
double
,
2
>&
coor
,
const
xt
::
xtensor
<
size_t
,
2
>&
conn
);
/**
Set the orientation of a mesh of triangular elements of type ElementType::Tri3.
\param coor Nodal coordinates [nnode, ndim].
\param conn Connectivity [nelem, nne].
\param orientation Target orientation (applied to all elements).
\return Connectivity (order of nodes-per-element may have changed) [nelem, nne].
*/
inline
xt
::
xtensor
<
size_t
,
2
>
setOrientation
(
const
xt
::
xtensor
<
double
,
2
>&
coor
,
const
xt
::
xtensor
<
size_t
,
2
>&
conn
,
int
orientation
=
-
1
);
/**
Set the orientation of a mesh of triangular elements of type ElementType::Tri3.
For efficiency this function reuses the output of getOrientation().
\param coor Nodal coordinates [nnode, ndim].
\param conn Connectivity [nelem, nne].
\param current Current orientation per element (output of getOrientation()) [nelem].
\param orientation Target orientation (applied to all elements).
\return Connectivity (order of nodes-per-element may have changed) [nelem, nne].
*/
inline
xt
::
xtensor
<
size_t
,
2
>
setOrientation
(
const
xt
::
xtensor
<
double
,
2
>&
coor
,
const
xt
::
xtensor
<
size_t
,
2
>&
conn
,
const
xt
::
xtensor
<
int
,
1
>&
current
,
int
orientation
=
-
1
);
}
// namespace Tri3
}
// namespace Mesh
}
// namespace GooseFEM
#include "MeshTri3.hpp"
#endif
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