moab::SpatialLocator Class Reference

Tool to facilitate spatial location of a point in a mesh. More...

#include <SpatialLocator.hpp>

Collaboration diagram for moab::SpatialLocator:

Public Member Functions
	SpatialLocator (Interface *impl, Range &elems, Tree *tree=NULL, ElemEvaluator *eval=NULL)
virtual	~SpatialLocator ()
ErrorCode	add_elems (Range &elems)
BoundBox &	local_box ()
const BoundBox &	local_box () const
ErrorCode	locate_points (Range &vertices, EntityHandle *ents, double *params, int *is_inside=NULL, const double rel_iter_tol=1.0e-10, const double abs_iter_tol=1.0e-10, const double inside_tol=1.0e-6)
ErrorCode	locate_points (const double *pos, int num_points, EntityHandle *ents, double *params, int *is_inside=NULL, const double rel_iter_tol=1.0e-10, const double abs_iter_tol=1.0e-10, const double inside_tol=1.0e-6)
ErrorCode	locate_points (Range &ents, const double rel_iter_tol=1.0e-10, const double abs_iter_tol=1.0e-10, const double inside_tol=1.0e-6)
ErrorCode	locate_points (const double *pos, int num_points, const double rel_iter_tol=1.0e-10, const double abs_iter_tol=1.0e-10, const double inside_tol=1.0e-6)
int	local_num_located ()
int	remote_num_located ()
Interface *	moab ()
	Return the MOAB interface associated with this locator. More...
ErrorCode	locate_point (const double *pos, EntityHandle &ent, double *params, int *is_inside=NULL, const double rel_iter_tol=1.0e-10, const double abs_iter_tol=1.0e-10, const double inside_tol=1.0e-6)
Tree *	get_tree ()
TupleList &	loc_table ()
const TupleList &	loc_table () const
TupleList &	par_loc_table ()
const TupleList &	par_loc_table () const
ElemEvaluator *	elem_eval ()
const ElemEvaluator *	elem_eval () const
void	elem_eval (ElemEvaluator *eval)
SpatialLocatorTimes &	sl_times ()
	Get spatial locator times object. More...
const SpatialLocatorTimes &	sl_times () const
	Get spatial locator times object. More...

Private Member Functions
void	create_tree ()

Private Attributes
Interface *	mbImpl
Range	myElems
int	myDim
Tree *	myTree
ElemEvaluator *	elemEval
bool	iCreatedTree
TupleList	locTable
TupleList	parLocTable
BoundBox	localBox
BoundBox	globalBox
CartVect	regDeltaXYZ
int	regNums [3]
std::map< int, BoundBox >	srcProcBoxes
SpatialLocatorTimes	myTimes
CpuTimer	myTimer
bool	timerInitialized

Detailed Description

Tool to facilitate spatial location of a point in a mesh.

SpatialLocator facilitates searching for points in or performing ray traces on collections of mesh entities in 2D or 3D. This searching is facilitated by a tree-based decomposition of the mesh. Various types of trees are implemented in MOAB and can be used by this tool, but by default it uses AdaptiveKDTree (see child classes of Tree for which others are available). Parallel and serial searching are both supported.

SpatialLocator can either cache the search results for points or pass back this information in arguments. Cached information is kept in locTable, indexed in the same order as search points passed in. This information consists of the entity handle containing the point and the parametric coordinates inside that element. Information about the points searched, e.g. the entities from which those points are derived, can be stored in the calling application if desired.

In parallel, there is a separation between the proc deciding which points to search for (the "target" proc), and the proc locating the point in its local mesh (the "source" proc). On the source proc, location information is cached in locTable, as in the serial case. By default, this location information (handle and parametric coords) is not returned to the target proc, since it would be of no use there. Instead, the rank of the source proc locating the point, and the index of that location info in the source proc's locTable, is returned; this information is stored on the target proc in this class's parLocTable variable. Again, information about the points searched should be stored in the calling application, if desired.

This class uses the ElemEvaluator class for specification and evaluation of basis functions (used for computing parametric coords within an entity). See documentation and examples for that class for usage information.

Definition at line 56 of file SpatialLocator.hpp.

Constructor & Destructor Documentation

SpatialLocator()

moab::SpatialLocator::SpatialLocator	(	Interface *	impl,
		Range &	elems,
		Tree *	tree = NULL,
		ElemEvaluator *	eval = NULL
	)

Definition at line 18 of file SpatialLocator.cpp.

 : mbImpl( impl ), myElems( elems ), myDim( -1 ), myTree( tree ), elemEval( eval ), iCreatedTree( false ),
 timerInitialized( false )
{
 create_tree();
 
 if( !elems.empty() )
 {
 myDim = mbImpl->dimension_from_handle( *elems.rbegin() );
 ErrorCode rval = myTree->build_tree( myElems );
 if( MB_SUCCESS != rval ) throw rval;
 
 rval = myTree->get_bounding_box( localBox );
 if( MB_SUCCESS != rval ) throw rval;
 }
 
 regNums[0] = regNums[1] = regNums[2] = 0;
}

References moab::Tree::build_tree(), create_tree(), moab::Interface::dimension_from_handle(), moab::Range::empty(), ErrorCode, moab::Tree::get_bounding_box(), localBox, MB_SUCCESS, mbImpl, myDim, myElems, myTree, moab::Range::rbegin(), and regNums.

~SpatialLocator()

moab::SpatialLocator::~SpatialLocator ( )

inlinevirtual

Definition at line 346 of file SpatialLocator.hpp.

{
 if( iCreatedTree && myTree ) delete myTree;
}

References iCreatedTree, and myTree.

Member Function Documentation

add_elems()

ErrorCode moab::SpatialLocator::add_elems

(

Range &

elems

)

Definition at line 51 of file SpatialLocator.cpp.

{
 if( elems.empty() ||
 mbImpl->dimension_from_handle( *elems.begin() ) != mbImpl->dimension_from_handle( *elems.rbegin() ) )
 return MB_FAILURE;
 
 myDim = mbImpl->dimension_from_handle( *elems.begin() );
 myElems = elems;
 
 ErrorCode rval = myTree->build_tree( myElems );
 return rval;
}

References moab::Range::begin(), moab::Tree::build_tree(), moab::Interface::dimension_from_handle(), moab::Range::empty(), ErrorCode, mbImpl, myDim, myElems, myTree, and moab::Range::rbegin().

create_tree()

void moab::SpatialLocator::create_tree ( )

private

Create a tree Tree type depends on what's in myElems: if empty or all vertices, creates a kdtree, otherwise creates a BVHTree.

Definition at line 37 of file SpatialLocator.cpp.

{
 if( myTree ) return;
 
 if( myElems.empty() || mbImpl->type_from_handle( *myElems.rbegin() ) == MBVERTEX )
 // create a kdtree if only vertices
 myTree = new AdaptiveKDTree( mbImpl );
 else
 // otherwise a BVHtree, since it performs better for elements
 myTree = new BVHTree( mbImpl );
 
 iCreatedTree = true;
}

References moab::Range::empty(), iCreatedTree, mbImpl, MBVERTEX, myElems, myTree, moab::Range::rbegin(), and moab::Interface::type_from_handle().

Referenced by SpatialLocator().

elem_eval() [1/3]

ElemEvaluator* moab::SpatialLocator::elem_eval ( )

inline

Definition at line 208 of file SpatialLocator.hpp.

 {
 return elemEval;
 }

References elemEval.

Referenced by moab::DataCoupler::DataCoupler(), moab::DataCoupler::interpolate(), and moab::DataCoupler::~DataCoupler().

elem_eval() [2/3]

const ElemEvaluator* moab::SpatialLocator::elem_eval ( ) const

inline

Definition at line 214 of file SpatialLocator.hpp.

 {
 return elemEval;
 }

References elemEval.

elem_eval() [3/3]

void moab::SpatialLocator::elem_eval ( ElemEvaluator *  eval )

inline

Definition at line 220 of file SpatialLocator.hpp.

 {
 elemEval = eval;
 if( myTree ) myTree->set_eval( eval );
 }

References elemEval, myTree, and moab::Tree::set_eval().

get_tree()

Tree* moab::SpatialLocator::get_tree ( )

inline

Definition at line 174 of file SpatialLocator.hpp.

 {
 return myTree;
 }

References myTree.

Referenced by DeformMeshRemap::execute().

loc_table() [1/2]

TupleList& moab::SpatialLocator::loc_table ( )

inline

Definition at line 181 of file SpatialLocator.hpp.

 {
 return locTable;
 }

References locTable.

Referenced by moab::DataCoupler::interpolate().

loc_table() [2/2]

const TupleList& moab::SpatialLocator::loc_table ( ) const

inline

Definition at line 188 of file SpatialLocator.hpp.

 {
 return locTable;
 }

References locTable.

local_box() [1/2]

BoundBox& moab::SpatialLocator::local_box ( )

inline

Definition at line 69 of file SpatialLocator.hpp.

 {
 return localBox;
 }

References localBox.

Referenced by main().

local_box() [2/2]

const BoundBox& moab::SpatialLocator::local_box ( ) const

inline

Definition at line 75 of file SpatialLocator.hpp.

 {
 return localBox;
 }

References localBox.

local_num_located()

int moab::SpatialLocator::local_num_located

(

)

Definition at line 499 of file SpatialLocator.cpp.

{
 int num_located = locTable.get_n() - std::count( locTable.vul_rd, locTable.vul_rd + locTable.get_n(), 0 );
 if( num_located != (int)locTable.get_n() )
 {
 Ulong* nl = std::find( locTable.vul_rd, locTable.vul_rd + locTable.get_n(), 0 );
 if( nl )
 {
 int idx = nl - locTable.vul_rd;
 if( idx )
 {
 }
 }
 }
 return num_located;
}

References moab::TupleList::get_n(), locTable, nl, and moab::TupleList::vul_rd.

Referenced by DeformMeshRemap::execute().

locate_point()

ErrorCode moab::SpatialLocator::locate_point ( const double *  pos, EntityHandle &  ent, double *  params, int *  is_inside = NULL, const double  rel_iter_tol = 1.0e-10, const double  abs_iter_tol = 1.0e-10, const double  inside_tol = 1.0e-6  )

inline

Definition at line 351 of file SpatialLocator.hpp.

{
 return locate_points( pos, 1, &ent, params, is_inside, rel_iter_tol, abs_iter_tol, inside_tol );
}

References locate_points().

Referenced by main().

locate_points() [1/4]

ErrorCode moab::SpatialLocator::locate_points	(	const double *	pos,
		int	num_points,
		const double	rel_iter_tol = 1.0e-10,
		const double	abs_iter_tol = 1.0e-10,
		const double	inside_tol = 1.0e-6
	)

Definition at line 382 of file SpatialLocator.cpp.

{
 bool i_initialized = false;
 if( !timerInitialized )
 {
 myTimer.time_elapsed();
 timerInitialized = true;
 i_initialized = true;
 }
 // initialize to tuple structure (p_ui, hs_ul, r[3]_d) (see header comments for locTable)
 locTable.initialize( 1, 0, 1, 3, num_points );
 locTable.enableWriteAccess();
 
 // pass storage directly into locate_points, since we know those arrays are contiguous
 ErrorCode rval = locate_points( pos, num_points, (EntityHandle*)locTable.vul_wr, locTable.vr_wr, NULL, rel_iter_tol,
 abs_iter_tol, inside_tol );
 std::fill( locTable.vi_wr, locTable.vi_wr + num_points, 0 );
 locTable.set_n( num_points );
 if( MB_SUCCESS != rval ) return rval;
 
 // only call this if I'm the top-level function, since it resets the last time called
 if( i_initialized ) myTimes.slTimes[SpatialLocatorTimes::SRC_SEARCH] = myTimer.time_elapsed();
 
 return MB_SUCCESS;
}

References moab::TupleList::enableWriteAccess(), ErrorCode, moab::TupleList::initialize(), locate_points(), locTable, MB_SUCCESS, myTimer, myTimes, moab::TupleList::set_n(), moab::SpatialLocatorTimes::slTimes, moab::SpatialLocatorTimes::SRC_SEARCH, moab::CpuTimer::time_elapsed(), timerInitialized, moab::TupleList::vi_wr, moab::TupleList::vr_wr, and moab::TupleList::vul_wr.

locate_points() [2/4]

ErrorCode moab::SpatialLocator::locate_points	(	const double *	pos,
		int	num_points,
		EntityHandle *	ents,
		double *	params,
		int *	is_inside = NULL,
		const double	rel_iter_tol = 1.0e-10,
		const double	abs_iter_tol = 1.0e-10,
		const double	inside_tol = 1.0e-6
	)

Definition at line 440 of file SpatialLocator.cpp.

{
 bool i_initialized = false;
 if( !timerInitialized )
 {
 myTimer.time_elapsed();
 timerInitialized = true;
 i_initialized = true;
 }
 
 /*
 double tmp_abs_iter_tol = abs_iter_tol;
 if (rel_iter_tol && !tmp_abs_iter_tol) {
 // relative epsilon given, translate to absolute epsilon using box dimensions
 tmp_abs_iter_tol = rel_iter_tol * localBox.diagonal_length();
 }
 */
 
 if( elemEval && myTree->get_eval() != elemEval ) myTree->set_eval( elemEval );
 
 ErrorCode rval = MB_SUCCESS;
 for( int i = 0; i < num_points; i++ )
 {
 int i3 = 3 * i;
 ErrorCode tmp_rval =
 myTree->point_search( pos + i3, ents[i], abs_iter_tol, inside_tol, NULL, NULL, (CartVect*)( params + i3 ) );
 if( MB_SUCCESS != tmp_rval )
 {
 rval = tmp_rval;
 continue;
 }
 
 if( debug && !ents[i] )
 {
 std::cout << "Point " << i << " not found; point: (" << pos[i3] << "," << pos[i3 + 1] << "," << pos[i3 + 2]
 << ")" << std::endl;
 }
 
 if( is_inside ) is_inside[i] = ( ents[i] ? true : false );
 }
 
 // only call this if I'm the top-level function, since it resets the last time called
 if( i_initialized ) myTimes.slTimes[SpatialLocatorTimes::SRC_SEARCH] = myTimer.time_elapsed();
 
 return rval;
}

References moab::debug, elemEval, ErrorCode, moab::Tree::get_eval(), MB_SUCCESS, myTimer, myTimes, myTree, moab::Tree::point_search(), moab::Tree::set_eval(), moab::SpatialLocatorTimes::slTimes, moab::SpatialLocatorTimes::SRC_SEARCH, moab::CpuTimer::time_elapsed(), and timerInitialized.

locate_points() [3/4]

ErrorCode moab::SpatialLocator::locate_points	(	Range &	ents,
		const double	rel_iter_tol = 1.0e-10,
		const double	abs_iter_tol = 1.0e-10,
		const double	inside_tol = 1.0e-6
	)

Definition at line 356 of file SpatialLocator.cpp.

{
 bool i_initialized = false;
 if( !timerInitialized )
 {
 myTimer.time_elapsed();
 timerInitialized = true;
 i_initialized = true;
 }
 
 assert( !verts.empty() && mbImpl->type_from_handle( *verts.rbegin() ) == MBVERTEX );
 std::vector< double > pos( 3 * verts.size() );
 ErrorCode rval = mbImpl->get_coords( verts, &pos[0] );
 if( MB_SUCCESS != rval ) return rval;
 rval = locate_points( &pos[0], verts.size(), rel_iter_tol, abs_iter_tol, inside_tol );
 if( MB_SUCCESS != rval ) return rval;
 
 // only call this if I'm the top-level function, since it resets the last time called
 if( i_initialized ) myTimes.slTimes[SpatialLocatorTimes::SRC_SEARCH] = myTimer.time_elapsed();
 
 return MB_SUCCESS;
}

References moab::Range::empty(), ErrorCode, moab::Interface::get_coords(), locate_points(), MB_SUCCESS, mbImpl, MBVERTEX, myTimer, myTimes, moab::Range::rbegin(), moab::Range::size(), moab::SpatialLocatorTimes::slTimes, moab::SpatialLocatorTimes::SRC_SEARCH, moab::CpuTimer::time_elapsed(), timerInitialized, and moab::Interface::type_from_handle().

locate_points() [4/4]

ErrorCode moab::SpatialLocator::locate_points	(	Range &	vertices,
		EntityHandle *	ents,
		double *	params,
		int *	is_inside = NULL,
		const double	rel_iter_tol = 1.0e-10,
		const double	abs_iter_tol = 1.0e-10,
		const double	inside_tol = 1.0e-6
	)

Definition at line 412 of file SpatialLocator.cpp.

{
 bool i_initialized = false;
 if( !timerInitialized )
 {
 myTimer.time_elapsed();
 timerInitialized = true;
 i_initialized = true;
 }
 
 assert( !verts.empty() && mbImpl->type_from_handle( *verts.rbegin() ) == MBVERTEX );
 std::vector< double > pos( 3 * verts.size() );
 ErrorCode rval = mbImpl->get_coords( verts, &pos[0] );
 if( MB_SUCCESS != rval ) return rval;
 rval = locate_points( &pos[0], verts.size(), ents, params, is_inside, rel_iter_tol, abs_iter_tol, inside_tol );
 
 // only call this if I'm the top-level function, since it resets the last time called
 if( i_initialized ) myTimes.slTimes[SpatialLocatorTimes::SRC_SEARCH] = myTimer.time_elapsed();
 
 return rval;
}

References moab::Range::empty(), ErrorCode, moab::Interface::get_coords(), MB_SUCCESS, mbImpl, MBVERTEX, myTimer, myTimes, moab::Range::rbegin(), moab::Range::size(), moab::SpatialLocatorTimes::slTimes, moab::SpatialLocatorTimes::SRC_SEARCH, moab::CpuTimer::time_elapsed(), timerInitialized, and moab::Interface::type_from_handle().

Referenced by locate_point(), locate_points(), and moab::DataCoupler::locate_points().

moab()

Interface* moab::SpatialLocator::moab ( )

inline

Return the MOAB interface associated with this locator.

Definition at line 159 of file SpatialLocator.hpp.

 {
 return mbImpl;
 }

References mbImpl.

par_loc_table() [1/2]

TupleList& moab::SpatialLocator::par_loc_table ( )

inline

Definition at line 195 of file SpatialLocator.hpp.

 {
 return parLocTable;
 }

References parLocTable.

Referenced by moab::DataCoupler::interpolate().

par_loc_table() [2/2]

const TupleList& moab::SpatialLocator::par_loc_table ( ) const

inline

Definition at line 202 of file SpatialLocator.hpp.

 {
 return parLocTable;
 }

References parLocTable.

remote_num_located()

int moab::SpatialLocator::remote_num_located

(

)

Definition at line 521 of file SpatialLocator.cpp.

{
 int located = 0;
 for( unsigned int i = 0; i < parLocTable.get_n(); i++ )
 if( parLocTable.vi_rd[2 * i] != -1 ) located++;
 return located;
}

References moab::TupleList::get_n(), parLocTable, and moab::TupleList::vi_rd.

sl_times() [1/2]

SpatialLocatorTimes& moab::SpatialLocator::sl_times ( )

inline

Get spatial locator times object.

Definition at line 227 of file SpatialLocator.hpp.

 {
 return myTimes;
 }

References myTimes.

sl_times() [2/2]

const SpatialLocatorTimes& moab::SpatialLocator::sl_times ( ) const

inline

Get spatial locator times object.

Definition at line 233 of file SpatialLocator.hpp.

 {
 return myTimes;
 }

References myTimes.

Member Data Documentation

elemEval

ElemEvaluator* moab::SpatialLocator::elemEval

private

Definition at line 285 of file SpatialLocator.hpp.

Referenced by elem_eval(), and locate_points().

globalBox

BoundBox moab::SpatialLocator::globalBox

private

Definition at line 318 of file SpatialLocator.hpp.

iCreatedTree

bool moab::SpatialLocator::iCreatedTree

private

Definition at line 288 of file SpatialLocator.hpp.

Referenced by create_tree(), and ~SpatialLocator().

localBox

BoundBox moab::SpatialLocator::localBox

private

Definition at line 314 of file SpatialLocator.hpp.

Referenced by local_box(), and SpatialLocator().

locTable

TupleList moab::SpatialLocator::locTable

private

Definition at line 297 of file SpatialLocator.hpp.

Referenced by loc_table(), local_num_located(), and locate_points().

mbImpl

Interface* moab::SpatialLocator::mbImpl

private

Definition at line 273 of file SpatialLocator.hpp.

Referenced by add_elems(), create_tree(), locate_points(), moab(), and SpatialLocator().

myDim

int moab::SpatialLocator::myDim

private

Definition at line 279 of file SpatialLocator.hpp.

Referenced by add_elems(), and SpatialLocator().

myElems

Range moab::SpatialLocator::myElems

private

Definition at line 276 of file SpatialLocator.hpp.

Referenced by add_elems(), create_tree(), and SpatialLocator().

myTimer

CpuTimer moab::SpatialLocator::myTimer

private

Definition at line 339 of file SpatialLocator.hpp.

Referenced by locate_points().

myTimes

SpatialLocatorTimes moab::SpatialLocator::myTimes

private

Definition at line 335 of file SpatialLocator.hpp.

Referenced by locate_points(), and sl_times().

myTree

Tree* moab::SpatialLocator::myTree

private

Definition at line 282 of file SpatialLocator.hpp.

Referenced by add_elems(), create_tree(), elem_eval(), get_tree(), locate_points(), SpatialLocator(), and ~SpatialLocator().

parLocTable

TupleList moab::SpatialLocator::parLocTable

private

Definition at line 310 of file SpatialLocator.hpp.

Referenced by par_loc_table(), and remote_num_located().

regDeltaXYZ

CartVect moab::SpatialLocator::regDeltaXYZ

private

Definition at line 322 of file SpatialLocator.hpp.

regNums

int moab::SpatialLocator::regNums[3]

private

Definition at line 326 of file SpatialLocator.hpp.

Referenced by SpatialLocator().

srcProcBoxes

std::map< int, BoundBox > moab::SpatialLocator::srcProcBoxes

private

Definition at line 331 of file SpatialLocator.hpp.

timerInitialized

bool moab::SpatialLocator::timerInitialized

private

Definition at line 343 of file SpatialLocator.hpp.

Referenced by locate_points().

---

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

• SpatialLocator.hpp
• SpatialLocator.cpp