app_surface/
touch.rs

1#[repr(C)]
2#[derive(Copy, Clone, Debug)]
3pub struct StylusAngle<T> {
4    pub azimuth: T,
5    pub altitude: T,
6}
7
8#[repr(C)]
9#[derive(Copy, Clone, Debug)]
10pub enum TouchPhase {
11    Started,
12    Moved, // Or pintch changed
13    Ended,
14    Cancelled,
15}
16
17#[repr(C)]
18#[derive(Copy, Clone, Debug)]
19pub struct Touch {
20    pub phase: TouchPhase,
21    pub position: glam::Vec2,
22    // The angle of the stylus: Apple Pencil
23    pub stylus_angle: Option<StylusAngle<f32>>,
24    pub pressure: f32,
25    // The radius of the contact ellipse along the major axis, in logical pixels.
26    pub major_radius: f32,
27    // Time interval from the previous touch point
28    pub interval: f32,
29}
30
31impl Touch {
32    pub fn touch_start(position: glam::Vec2) -> Self {
33        Self::new(position, TouchPhase::Started)
34    }
35
36    pub fn touch_move(position: glam::Vec2) -> Self {
37        Self::new(position, TouchPhase::Moved)
38    }
39
40    pub fn touch_end(position: glam::Vec2) -> Self {
41        Self::new(position, TouchPhase::Ended)
42    }
43
44    fn new(position: glam::Vec2, phase: TouchPhase) -> Self {
45        Touch {
46            position,
47            phase,
48            stylus_angle: None,
49            pressure: 0.0,
50            major_radius: 0.0,
51            interval: 0.0,
52        }
53    }
54}
app_surface/touch.rs

app_surface/
touch.rs
