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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2010/10/01)
#include "Wm5MathematicsPCH.h"
#include "Wm5DistPoint2Segment2.h"
namespace Wm5
{
//----------------------------------------------------------------------------
template <typename Real>
DistPoint2Segment2<Real>::DistPoint2Segment2 (const Vector2<Real>& point,
const Segment2<Real>& segment)
:
mPoint(&point),
mSegment(&segment)
{
}
//----------------------------------------------------------------------------
template <typename Real>
const Vector2<Real>& DistPoint2Segment2<Real>::GetPoint () const
{
return *mPoint;
}
//----------------------------------------------------------------------------
template <typename Real>
const Segment2<Real>& DistPoint2Segment2<Real>::GetSegment () const
{
return *mSegment;
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistPoint2Segment2<Real>::Get ()
{
return Math<Real>::Sqrt(GetSquared());
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistPoint2Segment2<Real>::GetSquared ()
{
Vector2<Real> diff = *mPoint - mSegment->Center;
Real param = mSegment->Direction.Dot(diff);
if (-mSegment->Extent < param)
{
if (param < mSegment->Extent)
{
mClosestPoint1 = mSegment->Center + param*mSegment->Direction;
}
else
{
mClosestPoint1 = mSegment->P1;
}
}
else
{
mClosestPoint1 = mSegment->P0;
}
mClosestPoint0 = *mPoint;
diff = mClosestPoint1 - mClosestPoint0;
return diff.SquaredLength();
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistPoint2Segment2<Real>::Get (Real t,
const Vector2<Real>& velocity0, const Vector2<Real>& velocity1)
{
Vector2<Real> movedPoint = *mPoint + t*velocity0;
Vector2<Real> movedCenter = mSegment->Center + t*velocity1;
Segment2<Real> movedSegment(movedCenter, mSegment->Direction,
mSegment->Extent);
return DistPoint2Segment2<Real>(movedPoint, movedSegment).Get();
}
//----------------------------------------------------------------------------
template <typename Real>
Real DistPoint2Segment2<Real>::GetSquared (Real t,
const Vector2<Real>& velocity0, const Vector2<Real>& velocity1)
{
Vector2<Real> movedPoint = *mPoint + t*velocity0;
Vector2<Real> movedCenter = mSegment->Center + t*velocity1;
Segment2<Real> movedSegment(movedCenter, mSegment->Direction,
mSegment->Extent);
return DistPoint2Segment2<Real>(movedPoint, movedSegment).GetSquared();
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Explicit instantiation.
//----------------------------------------------------------------------------
template WM5_MATHEMATICS_ITEM
class DistPoint2Segment2<float>;
template WM5_MATHEMATICS_ITEM
class DistPoint2Segment2<double>;
//----------------------------------------------------------------------------
}
|
