// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkParametricCatalanMinimal.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"

VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkParametricCatalanMinimal);
//----------------------------------------------------------------------------//
vtkParametricCatalanMinimal::vtkParametricCatalanMinimal()
{
  // Preset triangulation parameters
  this->MinimumU = -4. * vtkMath::Pi();
  this->MaximumU = 4. * vtkMath::Pi();
  this->MinimumV = -1.5;
  this->MaximumV = 1.5;

  this->JoinU = 0;
  this->JoinV = 0;
  this->TwistU = 0;
  this->TwistV = 0;
  this->ClockwiseOrdering = 0;
  this->DerivativesAvailable = 1;
}

//----------------------------------------------------------------------------//
vtkParametricCatalanMinimal::~vtkParametricCatalanMinimal() = default;

//----------------------------------------------------------------------------//
void vtkParametricCatalanMinimal::Evaluate(double uvw[3], double Pt[3], double Duvw[9])
{
  // Copy the parameters out of the vector, for the sake of convenience.
  double u = uvw[0];
  double v = uvw[1];

  // We're only going to need the u and v partial derivatives.
  // The w partial derivatives are not needed.
  double* Du = Duvw;
  double* Dv = Duvw + 3;

  // Location of the point. This parametrization was taken from:
  // https://www.math.hmc.edu/~gu/curves_and_surfaces/surfaces/catalan.html
  Pt[0] = u - cosh(v) * sin(u);
  Pt[1] = 1. - cos(u) * cosh(v);
  Pt[2] = 4. * sin(u / 2.) * sinh(v / 2.);

  // The derivative with respect to u:
  Du[0] = 1. - cosh(v) * cos(u);
  Du[1] = cosh(v) * sin(u);
  Du[2] = 2. * cos(u / 2.) * sinh(v / 2.);

  // The derivative with respect to v:
  Dv[0] = sin(u) * sinh(v);
  Dv[1] = -cos(u) * sinh(v);
  Dv[2] = 2. * sin(u / 2.) * cosh(v / 2.);
}

//----------------------------------------------------------------------------//
double vtkParametricCatalanMinimal::EvaluateScalar(double*, double*, double*)
{
  return 0;
}

//----------------------------------------------------------------------------//
void vtkParametricCatalanMinimal::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
