TriTauMetric Class Reference

More complex fake metric for testing finite difference. More...

Inheritance diagram for TriTauMetric:

Collaboration diagram for TriTauMetric:

Public Member Functions
std::string	get_name () const
int	get_negate_flag () const
	1 if metric should be minimized, -1 if metric should be maximized.
MsqMatrix< 3, 3 >	matrix (PatchData &pd, size_t elem_idx)
bool	evaluate (PatchData &pd, size_t element_idx, double &value, MsqError &)
	Get metric value at a logical location in the patch.
bool	evaluate_with_indices (PatchData &pd, size_t elem_idx, double &value, std::vector< size_t > &indices, MsqError &)
	Default implementation for all element-based metrics.

---

Detailed Description

More complex fake metric for testing finite difference.

Calculate /f$ (det(M)-1)^2 /f$ where the rows of M are the coordinates of the three vertices in the triangle.

Definition at line 232 of file QualityMetricTest.cpp.

---

Member Function Documentation

bool TriTauMetric::evaluate	(	PatchData &	pd,
		size_t	handle,
		double &	value,
		MsqError &	err
	)		[inline, virtual]

Get metric value at a logical location in the patch.

Evaluate the metric at one location in the PatchData.

Parameters:

pd	The patch.
handle	The location in the patch (as passed back from get_evaluations).
value	The output metric value.

Implements MBMesquite::QualityMetric.

Definition at line 258 of file QualityMetricTest.cpp.

References MBMesquite::det(), and value().

    {
        MsqMatrix< 3, 3 > M = matrix( pd, element_idx );
        value               = det( M ) - 1;
        value *= value;
        return true;
    }

bool TriTauMetric::evaluate_with_indices	(	PatchData &	pd,
		size_t	handle,
		double &	value,
		std::vector< size_t > &	indices,
		MsqError &	err
	)		[inline, virtual]

Default implementation for all element-based metrics.

Fill 'indices' with all free vertex indices in element, and call 'evaluate'.

Reimplemented from MBMesquite::ElementQM.

Definition at line 266 of file QualityMetricTest.cpp.

References conn, MBMesquite::det(), MBMesquite::PatchData::element_by_index(), MBMesquite::MsqMeshEntity::get_vertex_index_array(), MBMesquite::PatchData::is_vertex_free(), MBMesquite::MsqMeshEntity::node_count(), and value().

    {
        MsqMatrix< 3, 3 > M = matrix( pd, elem_idx );
        value               = det( M ) - 1;
        value *= value;

        indices.clear();
        unsigned nv        = pd.element_by_index( elem_idx ).node_count();
        const size_t* conn = pd.element_by_index( elem_idx ).get_vertex_index_array();
        for( unsigned i = 0; i < nv; ++i )
            if( pd.is_vertex_free( conn[i] ) ) indices.push_back( conn[i] );

        return true;
    }

std::string TriTauMetric::get_name

(

)

const [inline, virtual]

Implements MBMesquite::QualityMetric.

Definition at line 235 of file QualityMetricTest.cpp.

    {
        return "Triangle Tau Metric";
    }

int TriTauMetric::get_negate_flag

(

)

const [inline, virtual]

1 if metric should be minimized, -1 if metric should be maximized.

Implements MBMesquite::QualityMetric.

Definition at line 239 of file QualityMetricTest.cpp.

    {
        return 1;
    }

MsqMatrix< 3, 3 > TriTauMetric::matrix	(	PatchData &	pd,
		size_t	elem_idx
	)		[inline]

Definition at line 243 of file QualityMetricTest.cpp.

References conn, CPPUNIT_ASSERT, MBMesquite::PatchData::element_by_index(), MBMesquite::MsqMeshEntity::get_vertex_index_array(), MBMesquite::MsqMeshEntity::node_count(), MBMesquite::MsqMatrix< R, C >::set_row(), MBMesquite::Vector3D::to_array(), and MBMesquite::PatchData::vertex_by_index().

Referenced by QualityMetricTest::test_diagonal_tau(), QualityMetricTest::test_gradient_tau(), and QualityMetricTest::test_Hessian_tau().

    {
        MsqMeshEntity& elem = pd.element_by_index( elem_idx );
        unsigned nv         = elem.node_count();
        const size_t* conn  = elem.get_vertex_index_array();
        CPPUNIT_ASSERT( nv == 3 );

        MsqMatrix< 3, 3 > M;
        M.set_row( 0, pd.vertex_by_index( conn[0] ).to_array() );
        M.set_row( 1, pd.vertex_by_index( conn[1] ).to_array() );
        M.set_row( 2, pd.vertex_by_index( conn[2] ).to_array() );

        return M;
    }

List of all members.

---

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

• QualityMetricTest.cpp