/**
* \file
* \copyright
* Copyright (c) 2012-2023, OpenGeoSys Community (http://www.opengeosys.org)
* Distributed under a Modified BSD License.
* See accompanying file LICENSE.txt or
* http://www.opengeosys.org/project/license
*
*/
#pragma once
#include "EdgeReturn.h"
#include "Element.h"
#include "TriRule.h"
namespace MeshLib
{
/**
* This class represents a 2d triangle element with 3 nodes.
*
* The following sketch shows the node and edge numbering.
* \anchor TriNodeAndEdgeNumbering
* \code
*
* 2
* o
* / \
* / \
* 2/ \1
* / \
* / \
* 0-----------1
* 0
*
* \endcode
*/
class TriRule3 : public TriRule
{
public:
/// Constant: The number of all nodes for this element
static const unsigned n_all_nodes = 3u;
/// Constant: The FEM type of the element
static const CellType cell_type = CellType::TRI3;
/// Constant: Local node index table for edge
static const unsigned edge_nodes[3][2];
/// Returns the i-th edge of the element.
using EdgeReturn = MeshLib::LinearEdgeReturn;
/// Returns the ID of a face given an array of nodes.
static unsigned identifyFace(Node const* const* element_nodes,
Node const* nodes[2])
{
return FaceRule::identifyFace<TriRule3>(element_nodes, nodes);
}
}; /* class */
} // namespace MeshLib