1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkParametricEnneper.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkParametricEnneper);
//------------------------------------------------------------------------------
vtkParametricEnneper::vtkParametricEnneper()
{
// Preset triangulation parameters
this->MinimumU = -2.0;
this->MaximumU = 2.0;
this->MinimumV = -2.0;
this->MaximumV = 2.0;
this->JoinU = 0;
this->JoinV = 0;
this->TwistU = 0;
this->TwistV = 0;
this->ClockwiseOrdering = 0;
this->DerivativesAvailable = 1;
}
//------------------------------------------------------------------------------
vtkParametricEnneper::~vtkParametricEnneper() = default;
//------------------------------------------------------------------------------
void vtkParametricEnneper::Evaluate(double uvw[3], double Pt[3], double Duvw[9])
{
double u = uvw[0];
double v = uvw[1];
double* Du = Duvw;
double* Dv = Duvw + 3;
// The point
Pt[0] = u - u * u * u / 3 + u * v * v;
Pt[1] = v - v * v * v / 3 + u * u * v;
Pt[2] = u * u - v * v;
// The derivatives are:
Du[0] = 1 - u * u + v * v;
Dv[0] = 2 * u * v;
Du[1] = 2 * u * v;
Dv[1] = 1 - v * v + u * u;
Du[2] = 2 * u;
Dv[2] = -2 * v;
}
//------------------------------------------------------------------------------
double vtkParametricEnneper::EvaluateScalar(double*, double*, double*)
{
return 0;
}
//------------------------------------------------------------------------------
void vtkParametricEnneper::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
|
