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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// 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: 5.0.2 (2013/11/12)
#include "Wm5MathematicsPCH.h"
#include "Wm5IntrLine2Ray2.h"
#include "Wm5IntrLine2Line2.h"
namespace Wm5
{
//----------------------------------------------------------------------------
template <typename Real>
IntrLine2Ray2<Real>::IntrLine2Ray2 (const Line2<Real>& line,
const Ray2<Real>& ray)
:
mLine(&line),
mRay(&ray),
mDotThreshold(Math<Real>::ZERO_TOLERANCE)
{
}
//----------------------------------------------------------------------------
template <typename Real>
const Line2<Real>& IntrLine2Ray2<Real>::GetLine () const
{
return *mLine;
}
//----------------------------------------------------------------------------
template <typename Real>
const Ray2<Real>& IntrLine2Ray2<Real>::GetRay () const
{
return *mRay;
}
//----------------------------------------------------------------------------
template <typename Real>
bool IntrLine2Ray2<Real>::Test ()
{
Real s[2];
mIntersectionType = IntrLine2Line2<Real>::Classify(mLine->Origin,
mLine->Direction, mRay->Origin, mRay->Direction, mDotThreshold, s);
if (mIntersectionType == IT_POINT)
{
// Test whether the line-line intersection is on the ray.
if (s[1] >= (Real)0)
{
mQuantity = 1;
}
else
{
mQuantity = 0;
mIntersectionType = IT_EMPTY;
}
}
else if (mIntersectionType == IT_LINE)
{
mIntersectionType = IT_RAY;
mQuantity = INT_MAX;
}
else
{
mQuantity = 0;
}
return mIntersectionType != IT_EMPTY;
}
//----------------------------------------------------------------------------
template <typename Real>
bool IntrLine2Ray2<Real>::Find ()
{
Real s[2];
mIntersectionType = IntrLine2Line2<Real>::Classify(mLine->Origin,
mLine->Direction, mRay->Origin, mRay->Direction, mDotThreshold, s);
if (mIntersectionType == IT_POINT)
{
// Test whether the line-line intersection is on the ray.
if (s[1] >= (Real)0)
{
mQuantity = 1;
mPoint = mLine->Origin + s[0]*mLine->Direction;
}
else
{
mQuantity = 0;
mIntersectionType = IT_EMPTY;
}
}
else if (mIntersectionType == IT_LINE)
{
mIntersectionType = IT_RAY;
mQuantity = INT_MAX;
}
else
{
mQuantity = 0;
}
return mIntersectionType != IT_EMPTY;
}
//----------------------------------------------------------------------------
template <typename Real>
void IntrLine2Ray2<Real>::SetDotThreshold (Real dotThreshold)
{
if (dotThreshold >= (Real)0)
{
mDotThreshold = dotThreshold;
return;
}
assertion(false, "Dot threshold must be nonnegative.");
}
//----------------------------------------------------------------------------
template <typename Real>
Real IntrLine2Ray2<Real>::GetDotThreshold () const
{
return mDotThreshold;
}
//----------------------------------------------------------------------------
template <typename Real>
int IntrLine2Ray2<Real>::GetQuantity () const
{
return mQuantity;
}
//----------------------------------------------------------------------------
template <typename Real>
const Vector2<Real>& IntrLine2Ray2<Real>::GetPoint () const
{
return mPoint;
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Explicit instantiation.
//----------------------------------------------------------------------------
template WM5_MATHEMATICS_ITEM
class IntrLine2Ray2<float>;
template WM5_MATHEMATICS_ITEM
class IntrLine2Ray2<double>;
//----------------------------------------------------------------------------
}
|
