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
|
// 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 (2010/08/30)
#include "Wm5MathematicsPCH.h"
#include "Wm5HPlane.h"
using namespace Wm5;
//----------------------------------------------------------------------------
HPlane::HPlane ()
{
}
//----------------------------------------------------------------------------
HPlane::HPlane (const HPlane& plane)
:
mTuple(plane.mTuple)
{
}
//----------------------------------------------------------------------------
HPlane::~HPlane ()
{
}
//----------------------------------------------------------------------------
HPlane::HPlane (float normal0, float normal1, float normal2, float constant)
{
mTuple[0] = normal0;
mTuple[1] = normal1;
mTuple[2] = normal2;
mTuple[3] = -constant;
}
//----------------------------------------------------------------------------
HPlane::HPlane (const AVector& normal, float constant)
{
mTuple[0] = normal[0];
mTuple[1] = normal[1];
mTuple[2] = normal[2];
mTuple[3] = -constant;
}
//----------------------------------------------------------------------------
HPlane::HPlane (const AVector& normal, const APoint& p)
{
mTuple[0] = normal[0];
mTuple[1] = normal[1];
mTuple[2] = normal[2];
mTuple[3] = -p.Dot(normal);
}
//----------------------------------------------------------------------------
HPlane::HPlane (const APoint& p0, const APoint& p1, const APoint& p2)
{
AVector edge1 = p1 - p0;
AVector edge2 = p2 - p0;
AVector normal = edge1.UnitCross(edge2);
mTuple[0] = normal[0];
mTuple[1] = normal[1];
mTuple[2] = normal[2];
mTuple[3] = -p0.Dot(normal);
}
//----------------------------------------------------------------------------
HPlane::HPlane (const HPoint& tuple)
:
mTuple(tuple)
{
}
//----------------------------------------------------------------------------
HPlane& HPlane::operator= (const HPlane& plane)
{
mTuple = plane.mTuple;
return *this;
}
//----------------------------------------------------------------------------
bool HPlane::operator== (const HPlane& plane) const
{
return memcmp(mTuple, plane.mTuple, 4*sizeof(float)) == 0;
}
//----------------------------------------------------------------------------
bool HPlane::operator!= (const HPlane& plane) const
{
return memcmp(mTuple, plane.mTuple, 4*sizeof(float)) != 0;
}
//----------------------------------------------------------------------------
bool HPlane::operator< (const HPlane& plane) const
{
return memcmp(mTuple, plane.mTuple, 4*sizeof(float)) < 0;
}
//----------------------------------------------------------------------------
bool HPlane::operator<= (const HPlane& plane) const
{
return memcmp(mTuple, plane.mTuple, 4*sizeof(float)) <= 0;
}
//----------------------------------------------------------------------------
bool HPlane::operator> (const HPlane& plane) const
{
return memcmp(mTuple, plane.mTuple, 4*sizeof(float)) > 0;
}
//----------------------------------------------------------------------------
bool HPlane::operator>= (const HPlane& plane) const
{
return memcmp(mTuple, plane.mTuple, 4*sizeof(float)) >= 0;
}
//----------------------------------------------------------------------------
float HPlane::Normalize (const float epsilon)
{
float length = sqrtf(mTuple[0]*mTuple[0] + mTuple[1]*mTuple[1] +
mTuple[2]*mTuple[2]);
if (length > epsilon)
{
float invLength = 1.0f/length;
mTuple[0] *= invLength;
mTuple[1] *= invLength;
mTuple[2] *= invLength;
mTuple[3] *= invLength;
}
return length;
}
//----------------------------------------------------------------------------
float HPlane::DistanceTo (const APoint& p) const
{
return mTuple[0]*p[0] + mTuple[1]*p[1] + mTuple[2]*p[2] + mTuple[3];
}
//----------------------------------------------------------------------------
int HPlane::WhichSide (const APoint& p) const
{
float distance = DistanceTo(p);
if (distance < 0.0f)
{
return -1;
}
else if (distance > 0.0f)
{
return +1;
}
else
{
return 0;
}
}
//----------------------------------------------------------------------------
|
