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
65
66
67
68
69
70
71
72
73
74
75
76
77
|
// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkParametricRoman.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkParametricRoman);
//------------------------------------------------------------------------------
vtkParametricRoman::vtkParametricRoman()
: Radius(1)
{
this->MinimumU = 0;
this->MaximumU = vtkMath::Pi();
this->MinimumV = 0;
this->MaximumV = vtkMath::Pi();
this->JoinU = 1;
this->JoinV = 1;
this->TwistU = 1;
this->TwistV = 0;
this->ClockwiseOrdering = 0;
this->DerivativesAvailable = 1;
}
//------------------------------------------------------------------------------
vtkParametricRoman::~vtkParametricRoman() = default;
//------------------------------------------------------------------------------
void vtkParametricRoman::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;
double cu = cos(u);
double c2u = cos(2.0 * u);
double su = sin(u);
double s2u = sin(2.0 * u);
double cv = cos(v);
double cv2 = cv * cv;
double c2v = cos(2.0 * v);
double s2v = sin(2.0 * v);
double sv = sin(v);
double a2 = this->Radius * this->Radius;
// The point
Pt[0] = a2 * cv2 * s2u / 2.0;
Pt[1] = a2 * su * s2v / 2.0;
Pt[2] = a2 * cu * s2v / 2.0;
// The derivatives are:
Du[0] = a2 * cv2 * c2u;
Du[1] = a2 * cu * s2v / 2.0;
Du[2] = -a2 * su * s2v / 2.0;
Dv[0] = -a2 * cv * s2u * sv;
Dv[1] = a2 * su * c2v;
Dv[2] = a2 * cu * c2v;
}
//------------------------------------------------------------------------------
double vtkParametricRoman::EvaluateScalar(
double* vtkNotUsed(uv[3]), double* vtkNotUsed(Pt[3]), double* vtkNotUsed(Duv[9]))
{
return 0;
}
//------------------------------------------------------------------------------
void vtkParametricRoman::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Radius: " << this->Radius << "\n";
}
VTK_ABI_NAMESPACE_END
|
