-
Notifications
You must be signed in to change notification settings - Fork 0
/
vec3f.go
167 lines (127 loc) · 2.67 KB
/
vec3f.go
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
package kml
import (
"fmt"
"math"
)
type Vec3f struct {
X float32
Y float32
Z float32
}
func (v *Vec3f) Equal(v2 Vec3f) bool {
return v.X == v2.X && v.Y == v2.Y && v.Z == v2.Z
}
func (v *Vec3f) Normalize() {
l := float32(math.Sqrt(float64(v.X*v.X + v.Y*v.Y + v.Z*v.Z)))
if l != 0 {
v.X /= l
v.Y /= l
v.Z /= l
}
}
func NormalizeVec3f(result, v *Vec3f) *Vec3f {
l := float32(math.Sqrt(float64(v.X*v.X + v.Y*v.Y + v.Z*v.Z)))
if l != 0 {
result.X = v.X / l
result.Y = v.Y / l
result.Z = v.Z / l
}
return result
}
func (v Vec3f) Length() float32 {
return float32(math.Sqrt(float64(v.X*v.X + v.Y*v.Y + v.Z*v.Z)))
}
func (v Vec3f) Distance(v2 Vec3f) float32 {
var t Vec3f
t.X = v.X - v2.X
t.Y = v.Y - v2.Y
t.Z = v.Z - v2.Z
return float32(math.Sqrt(float64(t.X*t.X + t.Y*t.Y + t.Z*t.Z)))
}
func AddVec3f(result, v1, v2 *Vec3f) *Vec3f {
result.X = v1.X + v2.X
result.Y = v1.Y + v2.Y
result.Z = v1.Z + v2.Z
return result
}
func SubVec3f(result, v1, v2 *Vec3f) *Vec3f {
result.X = v1.X - v2.X
result.Y = v1.Y - v2.Y
result.Z = v1.Z - v2.Z
return result
}
func MulVec3f(result, v1, v2 *Vec3f) *Vec3f {
result.X = v1.X * v2.X
result.Y = v1.Y * v2.Y
result.Z = v1.Z * v2.Z
return result
}
func ScaleVec3f(result, v1 *Vec3f, v float32) *Vec3f {
result.X = v1.X * v
result.Y = v1.Y * v
result.Z = v1.Z * v
return result
}
func CrossVec3f(result, v1, v2 *Vec3f) *Vec3f {
result.X = v1.Y*v2.Z - v1.Z*v2.Y
result.Y = v1.Z*v2.X - v1.X*v2.Z
result.Z = v1.X*v2.Y - v1.Y*v2.X
return result
}
func CrossVec3fSlow(v1, v2 *Vec3f) Vec3f {
var result Vec3f
result.X = v1.Y*v2.Z - v1.Z*v2.Y
result.Y = v1.Z*v2.X - v1.X*v2.Z
result.Z = v1.X*v2.Y - v1.Y*v2.X
return result
}
func DotVec3f(v1 *Vec3f, v2 *Vec3f) float32 {
return (((v1.X * v2.X) + (v1.Y * v2.Y)) + (v1.Z * v2.Z))
}
func DivVec3f(result, v1 *Vec3f, f float32) *Vec3f {
result.X = v1.X / f
result.Y = v1.Y / f
result.Z = v1.Z / f
return result
}
func (v Vec3f) String() string {
return fmt.Sprintf("[%f,%f,%f]", v.X, v.Y, v.Z)
}
func (v *Vec3f) Add(v1 Vec3f) Vec3f {
return Vec3f{
v.X + v1.X,
v.Y + v1.Y,
v.Z + v1.Z}
}
func (v *Vec3f) Sub(v1 Vec3f) Vec3f {
return Vec3f{
v.X - v1.X,
v.Y - v1.Y,
v.Z - v1.Z}
}
// Add In Place
func (v *Vec3f) AddIP(v1 Vec3f) {
v.X += v1.X
v.Y += v1.Y
v.Z += v1.Z
}
func (v *Vec3f) ScaleIP(m float32) {
v.X *= m
v.Y *= m
v.Z *= m
}
func (v *Vec3f) Scale(f float32) Vec3f {
return Vec3f{
v.X * f,
v.Y * f,
v.Z * f}
}
func (v *Vec3f) ToVec3d() Vec3d {
return Vec3d{float64(v.X), float64(v.Y), float64(v.Z)}
}
func LerpVec3f(v0, v1 Vec3f, t float32) Vec3f {
it := 1.0 - t
return Vec3f{v0.X*it + v1.X*t,
v0.Y*it + v1.Y*t,
v0.Z*it + v1.Z*t}
}