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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBezierCurve.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkBezierCurve.h"
#include "vtkBezierInterpolation.h"
#include "vtkCellData.h"
#include "vtkDoubleArray.h"
#include "vtkIdList.h"
#include "vtkLine.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkTriangle.h"
#include "vtkVector.h"
#include "vtkVectorOperators.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkBezierCurve);
vtkBezierCurve::vtkBezierCurve() = default;
vtkBezierCurve::~vtkBezierCurve() = default;
void vtkBezierCurve::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
/**\brief Set the rational weight of the cell, given a vtkDataSet
*/
void vtkBezierCurve::SetRationalWeightsFromPointData(
vtkPointData* point_data, const vtkIdType numPts)
{
vtkDataArray* v = point_data->GetRationalWeights();
if (v)
{
this->GetRationalWeights()->SetNumberOfTuples(numPts);
for (vtkIdType i = 0; i < numPts; i++)
{
this->GetRationalWeights()->SetValue(i, v->GetTuple1(this->PointIds->GetId(i)));
}
}
else
this->GetRationalWeights()->Reset();
}
/**\brief Populate the linear segment returned by GetApprox() with point-data from one voxel-like
* intervals of this cell.
*
* Ensure that you have called GetOrder() before calling this method
* so that this->Order is up to date. This method does no checking
* before using it to map connectivity-array offsets.
*/
vtkLine* vtkBezierCurve::GetApproximateLine(
int subId, vtkDataArray* scalarsIn, vtkDataArray* scalarsOut)
{
vtkLine* approx = this->GetApprox();
bool doScalars = (scalarsIn && scalarsOut);
if (doScalars)
{
scalarsOut->SetNumberOfTuples(2);
}
int i;
if (!this->SubCellCoordinatesFromId(i, subId))
{
vtkErrorMacro("Invalid subId " << subId);
return nullptr;
}
// Get the point ids (and optionally scalars) for each of the 2 corners
// in the approximating line spanned by (i, i+1):
for (vtkIdType ic = 0; ic < 2; ++ic)
{
const vtkIdType corner = this->PointIndexFromIJK(i + ic, 0, 0);
vtkVector3d cp;
// Only the first four corners are interpolatory, we need to project the value of the other
// nodes
if (corner < 2)
{
this->Points->GetPoint(corner, cp.GetData());
}
else
{
this->SetParametricCoords();
double pcoords[3];
this->PointParametricCoordinates->GetPoint(corner, pcoords);
int subIdtps;
const int numtripts = (this->Order[0] + 1);
std::vector<double> weights(numtripts);
this->vtkHigherOrderCurve::EvaluateLocation(subIdtps, pcoords, cp.GetData(), weights.data());
}
approx->Points->SetPoint(ic, cp.GetData());
approx->PointIds->SetId(ic, doScalars ? corner : this->PointIds->GetId(corner));
if (doScalars)
{
scalarsOut->SetTuple(ic, scalarsIn->GetTuple(corner));
}
}
return approx;
}
void vtkBezierCurve::InterpolateFunctions(const double pcoords[3], double* weights)
{
vtkBezierInterpolation::Tensor1ShapeFunctions(this->GetOrder(), pcoords, weights);
// If the unit cell has rational weights: weights_i = weights_i * rationalWeights / sum( weights_i
// * rationalWeights )
const bool has_rational_weights = RationalWeights->GetNumberOfTuples() > 0;
if (has_rational_weights)
{
vtkIdType nPoints = this->GetPoints()->GetNumberOfPoints();
double w = 0;
for (vtkIdType idx = 0; idx < nPoints; ++idx)
{
weights[idx] *= RationalWeights->GetTuple1(idx);
w += weights[idx];
}
const double one_over_rational_weight = 1. / w;
for (vtkIdType idx = 0; idx < nPoints; ++idx)
weights[idx] *= one_over_rational_weight;
}
}
void vtkBezierCurve::InterpolateDerivs(const double pcoords[3], double* derivs)
{
vtkBezierInterpolation::Tensor1ShapeDerivatives(this->GetOrder(), pcoords, derivs);
}
vtkDoubleArray* vtkBezierCurve::GetRationalWeights()
{
return RationalWeights.Get();
}
VTK_ABI_NAMESPACE_END
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