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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#include "BLI_float3.hh"
namespace blender {
struct float2 {
float x, y;
float2() = default;
float2(const float *ptr) : x{ptr[0]}, y{ptr[1]}
{
}
explicit float2(float value) : x(value), y(value)
{
}
explicit float2(int value) : x(value), y(value)
{
}
float2(float x, float y) : x(x), y(y)
{
}
float2(const float3 &other) : x(other.x), y(other.y)
{
}
operator float *()
{
return &x;
}
operator const float *() const
{
return &x;
}
float length() const
{
return len_v2(*this);
}
float length_squared() const
{
return len_squared_v2(*this);
}
bool is_zero() const
{
return this->x == 0.0f && this->y == 0.0f;
}
float2 &operator+=(const float2 &other)
{
x += other.x;
y += other.y;
return *this;
}
float2 &operator-=(const float2 &other)
{
x -= other.x;
y -= other.y;
return *this;
}
float2 &operator*=(float factor)
{
x *= factor;
y *= factor;
return *this;
}
float2 &operator/=(float divisor)
{
x /= divisor;
y /= divisor;
return *this;
}
uint64_t hash() const
{
uint64_t x1 = *reinterpret_cast<const uint32_t *>(&x);
uint64_t x2 = *reinterpret_cast<const uint32_t *>(&y);
return (x1 * 812519) ^ (x2 * 707951);
}
friend float2 operator+(const float2 &a, const float2 &b)
{
return {a.x + b.x, a.y + b.y};
}
friend float2 operator-(const float2 &a, const float2 &b)
{
return {a.x - b.x, a.y - b.y};
}
friend float2 operator-(const float2 &a, const float &b)
{
return {a.x - b, a.y - b};
}
friend float2 operator*(const float2 &a, float b)
{
return {a.x * b, a.y * b};
}
friend float2 operator/(const float2 &a, float b)
{
BLI_assert(b != 0.0f);
return {a.x / b, a.y / b};
}
friend float2 operator*(float a, const float2 &b)
{
return b * a;
}
friend std::ostream &operator<<(std::ostream &stream, const float2 &v)
{
stream << "(" << v.x << ", " << v.y << ")";
return stream;
}
static float2 safe_divide(const float2 &a, const float b)
{
return (b != 0.0f) ? a / b : float2(0.0f);
}
static float2 floor(const float2 &a)
{
return float2(floorf(a.x), floorf(a.y));
}
/**
* Returns a normalized vector. The original vector is not changed.
*/
float2 normalized() const
{
float2 result;
normalize_v2_v2(result, *this);
return result;
}
static float dot(const float2 &a, const float2 &b)
{
return a.x * b.x + a.y * b.y;
}
static float2 interpolate(const float2 &a, const float2 &b, float t)
{
return a * (1 - t) + b * t;
}
static float2 abs(const float2 &a)
{
return float2(fabsf(a.x), fabsf(a.y));
}
static float distance(const float2 &a, const float2 &b)
{
return (a - b).length();
}
static float distance_squared(const float2 &a, const float2 &b)
{
float2 diff = a - b;
return float2::dot(diff, diff);
}
struct isect_result {
enum {
LINE_LINE_COLINEAR = -1,
LINE_LINE_NONE = 0,
LINE_LINE_EXACT = 1,
LINE_LINE_CROSS = 2,
} kind;
float lambda;
float mu;
};
static isect_result isect_seg_seg(const float2 &v1,
const float2 &v2,
const float2 &v3,
const float2 &v4);
friend bool operator==(const float2 &a, const float2 &b)
{
return a.x == b.x && a.y == b.y;
}
friend bool operator!=(const float2 &a, const float2 &b)
{
return !(a == b);
}
};
} // namespace blender
|
