-
Notifications
You must be signed in to change notification settings - Fork 192
/
float3.h
171 lines (147 loc) · 4.49 KB
/
float3.h
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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/**********************************************************************
Copyright (c) 2020 Advanced Micro Devices, Inc. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
********************************************************************/
#pragma once
#include <algorithm>
#include <cmath>
#if defined(_WIN32) && !defined(NO_MIN_MAX)
#undef MIN
#undef MAX
#undef min
#undef max
#endif
namespace bvh
{
class float3
{
public:
float3(float xx = 0.f, float yy = 0.f, float zz = 0.f, float ww = 0.f) : x(xx), y(yy), z(zz), w(ww) {}
float& operator[](int i) { return *(&x + i); }
float operator[](int i) const { return *(&x + i); }
float3 operator-() const { return float3(-x, -y, -z); }
float sqnorm() const { return x * x + y * y + z * z; }
void normalize() { (*this) /= (std::sqrt(sqnorm())); }
float3& operator+=(float3 const& o)
{
x += o.x;
y += o.y;
z += o.z;
return *this;
}
float3& operator-=(float3 const& o)
{
x -= o.x;
y -= o.y;
z -= o.z;
return *this;
}
float3& operator*=(float3 const& o)
{
x *= o.x;
y *= o.y;
z *= o.z;
return *this;
}
float3& operator*=(float c)
{
x *= c;
y *= c;
z *= c;
return *this;
}
float3& operator/=(float c)
{
const float cinv = 1.f / c;
x *= cinv;
y *= cinv;
z *= cinv;
return *this;
}
float x, y, z, w;
};
typedef float3 float4;
inline float3 operator+(float3 const& v1, float3 const& v2)
{
float3 res = v1;
return res += v2;
}
inline float3 operator-(float3 const& v1, float3 const& v2)
{
float3 res = v1;
return res -= v2;
}
inline float3 operator*(float3 const& v1, float3 const& v2)
{
float3 res = v1;
return res *= v2;
}
inline float3 operator*(float3 const& v1, float c)
{
float3 res = v1;
return res *= c;
}
inline float3 operator*(float c, float3 const& v1) { return operator*(v1, c); }
inline float dot(float3 const& v1, float3 const& v2) { return v1.x * v2.x + v1.y * v2.y + v1.z * v2.z; }
inline float3 normalize(float3 const& v)
{
float3 res = v;
res.normalize();
return res;
}
inline float3 cross(float3 const& v1, float3 const& v2)
{
/// |i j k|
/// |v1x v1y v1z|
/// |v2x v2y v2z|
return float3(v1.y * v2.z - v2.y * v1.z, v2.x * v1.z - v1.x * v2.z, v1.x * v2.y - v1.y * v2.x);
}
inline float3 vmin(float3 const& v1, float3 const& v2)
{
return float3(std::min(v1.x, v2.x), std::min(v1.y, v2.y), std::min(v1.z, v2.z));
}
inline void vmin(float3 const& v1, float3 const& v2, float3& v)
{
v.x = std::min(v1.x, v2.x);
v.y = std::min(v1.y, v2.y);
v.z = std::min(v1.z, v2.z);
}
inline float3 fma(float3 const& v1, float3 const& v2, float3 const& v3) { return v1 * v2 + v3; }
inline float3 vmax(float3 const& v1, float3 const& v2)
{
return float3(std::max(v1.x, v2.x), std::max(v1.y, v2.y), std::max(v1.z, v2.z));
}
inline void vmax(float3 const& v1, float3 const& v2, float3& v)
{
v.x = std::max(v1.x, v2.x);
v.y = std::max(v1.y, v2.y);
v.z = std::max(v1.z, v2.z);
}
// Safe RCP
inline float3 rcp(const float3& d)
{
float dirx = d.x;
float diry = d.y;
float dirz = d.z;
float ooeps = 1e-5f;
float3 invd;
invd.x = 1.f / (abs(dirx) > ooeps ? dirx : copysign(ooeps, dirx));
invd.y = 1.f / (abs(diry) > ooeps ? diry : copysign(ooeps, diry));
invd.z = 1.f / (abs(dirz) > ooeps ? dirz : copysign(ooeps, dirz));
return invd;
}
} // namespace bvh