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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkKdTreePointLocator.h"
#include "vtkKdTree.h"
#include "vtkObjectFactory.h"
#include "vtkPointSet.h"
VTK_ABI_NAMESPACE_BEGIN
//------------------------------------------------------------------------------
vtkStandardNewMacro(vtkKdTreePointLocator);
//------------------------------------------------------------------------------
vtkKdTreePointLocator::vtkKdTreePointLocator()
{
this->KdTree = nullptr;
}
//------------------------------------------------------------------------------
vtkKdTreePointLocator::~vtkKdTreePointLocator()
{
if (this->KdTree)
{
this->KdTree->Delete();
}
}
//------------------------------------------------------------------------------
vtkIdType vtkKdTreePointLocator::FindClosestPoint(const double x[3])
{
this->BuildLocator();
double dist2;
return this->KdTree->FindClosestPoint(x[0], x[1], x[2], dist2);
}
//------------------------------------------------------------------------------
vtkIdType vtkKdTreePointLocator::FindClosestPointWithinRadius(
double radius, const double x[3], double& dist2)
{
this->BuildLocator();
return this->KdTree->FindClosestPointWithinRadius(radius, x, dist2);
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::FindClosestNPoints(int N, const double x[3], vtkIdList* result)
{
this->BuildLocator();
this->KdTree->FindClosestNPoints(N, x, result);
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::FindPointsWithinRadius(double R, const double x[3], vtkIdList* result)
{
this->BuildLocator();
this->KdTree->FindPointsWithinRadius(R, x, result);
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::FreeSearchStructure()
{
if (this->KdTree)
{
this->KdTree->Delete();
this->KdTree = nullptr;
}
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::BuildLocator()
{
// don't rebuild if build time is newer than modified and dataset modified time
if (this->KdTree && this->BuildTime > this->MTime && this->BuildTime > this->DataSet->GetMTime())
{
return;
}
// don't rebuild if UseExistingSearchStructure is ON and a search structure already exists
if (this->KdTree && this->UseExistingSearchStructure)
{
this->BuildTime.Modified();
vtkDebugMacro(<< "BuildLocator exited - UseExistingSearchStructure");
return;
}
this->BuildLocatorInternal();
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::ForceBuildLocator()
{
this->BuildLocatorInternal();
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::BuildLocatorInternal()
{
if (!this->DataSet || (this->DataSet->GetNumberOfPoints()) < 1)
{
vtkErrorMacro(<< "No points to build");
return;
}
// Prepare
this->FreeSearchStructure();
vtkPointSet* pointSet = vtkPointSet::SafeDownCast(this->GetDataSet());
if (!pointSet)
{
vtkErrorMacro("vtkKdTreePointLocator requires a PointSet to build locator.");
return;
}
this->KdTree = vtkKdTree::New();
this->KdTree->SetUseExistingSearchStructure(this->UseExistingSearchStructure);
this->KdTree->BuildLocatorFromPoints(pointSet);
this->KdTree->GetBounds(this->Bounds);
this->BuildTime.Modified();
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::GenerateRepresentation(int level, vtkPolyData* pd)
{
this->BuildLocator();
this->KdTree->GenerateRepresentation(level, pd);
}
//------------------------------------------------------------------------------
void vtkKdTreePointLocator::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "KdTree " << this->KdTree << "\n";
}
VTK_ABI_NAMESPACE_END
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