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
use cgmath;
use maths::{Euler, Matrix4f, Point3f, Quaternion, Vector3f};
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct Transform {
pub position: Point3f,
pub scale: Vector3f,
pub rotation: Vector3f,
}
impl Default for Transform {
fn default() -> Self {
Self::new()
}
}
impl Transform {
pub fn new() -> Self {
Self {
position: Point3f::new(0.0, 0.0, 0.0),
scale: Vector3f::new(1.0, 1.0, 1.0),
rotation: Vector3f::new(0.0, 0.0, 0.0),
}
}
pub fn from_position(position: Point3f) -> Self {
Self {
position,
scale: Vector3f::new(1.0, 1.0, 1.0),
rotation: Vector3f::new(0.0, 0.0, 0.0),
}
}
pub fn from_scale(scale: Vector3f) -> Self {
Self {
position: Point3f::new(0.0, 0.0, 0.0),
scale,
rotation: Vector3f::new(0.0, 0.0, 0.0),
}
}
pub fn from_rotation(rotation: Vector3f) -> Self {
Self {
position: Point3f::new(0.0, 0.0, 0.0),
scale: Vector3f::new(1.0, 1.0, 1.0),
rotation,
}
}
pub fn matrix(&self) -> Matrix4f {
let quaternion = Quaternion::from(Euler::new(
cgmath::Deg(self.rotation.x),
cgmath::Deg(self.rotation.y),
cgmath::Deg(self.rotation.z),
));
let rot = Matrix4f::from(quaternion);
let scale = Matrix4f::new(
self.scale.x,
0.,
0.,
0.,
0.,
self.scale.y,
0.,
0.,
0.,
0.,
self.scale.z,
0.,
0.,
0.,
0.,
1.,
);
let translate = Matrix4f::new(
1.,
0.,
0.,
0.,
0.,
1.,
0.,
0.,
0.,
0.,
1.,
0.,
self.position.x,
self.position.y,
self.position.z,
1.,
);
translate * rot * scale
}
}