void TerminationCriterion::initialize_queue( MeshDomainAssoc* mesh_and_domain,
const Settings* ,
MsqError& err )
{
if (VERTEX_MOVEMENT_ABS_EDGE_LENGTH & (terminationCriterionFlag|cullingMethodFlag))
{
Mesh* mesh = mesh_and_domain->get_mesh();
MeshUtil tool(mesh);
SimpleStats stats;
tool.edge_length_distribution( stats, err );
MSQ_ERRRTN(err);
double limit = vertexMovementAvgBeta * (stats.average() - stats.standard_deviation());
// we actually calculate the square of the length
vertexMovementAbsoluteAvgEdge = limit * limit;
if (VERTEX_MOVEMENT_ABS_EDGE_LENGTH & cullingMethodFlag)
cullingEps = limit;
}
}
void TerminationCriterionTest::test_absolute_vertex_movement_edge_length()
{
MsqPrintError err(std::cout);
// define two-tet mesh where tets share a face
double coords[] = { 0, -5, 0,
0, 5, 0,
1, 0, 0,
0, 0, 0,
0, 0, 1 };
const unsigned long conn[] = { 4, 3, 2, 0,
2, 3, 4, 1 };
int fixed[5] = {0};
ArrayMesh mesh( 3, 5, coords, fixed, 2, TETRAHEDRON, conn );
// calculate beta
const double LIMIT = 1e-4; // desired absolute limit
MeshUtil tool(&mesh);
SimpleStats len;
tool.edge_length_distribution( len, err );
ASSERT_NO_ERROR(err);
const double beta = LIMIT / (len.average() - len.standard_deviation());
// initialize termination criterion
TerminationCriterion tc;
tc.add_absolute_vertex_movement_edge_length( beta );
MeshDomainAssoc mesh_and_domain2 = MeshDomainAssoc(&mesh, 0);
tc.initialize_queue( &mesh_and_domain2, 0, err ); ASSERT_NO_ERROR(err);
// get a patch data
PatchData pd;
pd.set_mesh( &mesh );
pd.fill_global_patch( err ); ASSERT_NO_ERROR(err);
// test termination criteiorn
tc.reset_inner( pd, ofEval, err );
ASSERT_NO_ERROR(err);
tc.reset_patch( pd, err );
ASSERT_NO_ERROR(err);
CPPUNIT_ASSERT(!tc.terminate());
const double FIRST_STEP=10.0;
// move a vertex by 10 units and check that it did not meet criterion
pd.move_vertex( Vector3D(FIRST_STEP,0,0), 0, err );
ASSERT_NO_ERROR(err);
tc.accumulate_inner( pd, 0.0, 0, err );
ASSERT_NO_ERROR(err);
tc.accumulate_patch( pd, err );
ASSERT_NO_ERROR(err);
CPPUNIT_ASSERT(!tc.terminate());
double test_limit = LIMIT;
int idx = 0;
for (double step = FIRST_STEP; step > test_limit; step *= 0.09) {
idx = (idx + 1) % pd.num_free_vertices();
pd.move_vertex( Vector3D(step,0,0), idx, err );
ASSERT_NO_ERROR(err);
tc.accumulate_inner( pd, 0.0, 0, err );
ASSERT_NO_ERROR(err);
tc.accumulate_patch( pd, err );
ASSERT_NO_ERROR(err);
CPPUNIT_ASSERT(!tc.terminate());
}
idx = (idx + 1) % pd.num_free_vertices();
pd.move_vertex( Vector3D(0.5*test_limit,0,0), idx, err );
ASSERT_NO_ERROR(err);
tc.accumulate_inner( pd, 0.0, 0, err );
ASSERT_NO_ERROR(err);
tc.accumulate_patch( pd, err );
ASSERT_NO_ERROR(err);
CPPUNIT_ASSERT(tc.terminate());
}