OXYGENHUB
# 5501b1c657b2 oxygenhub / crates / backdrop / src / scene.rs
1.8 KiB · Rust · last changed feat(web): the mark, ripples, the swarm and adrift (closes #167) 23 days ago source blame history raw
6246d1e5 Andy McCall ↶ 1 
//! A backdrop's scene (docs/backgrounds.md §2): what it draws and how it
2 
//! moves. The engine (lib.rs) drives any of them the same way.
3
4 
use crate::sky::Colours;
5
6 
pub trait Scene {
7 
    /// The view is now `w` by `h` CSS pixels, the page's content column
8 
    /// between `avoid`'s left and right.
9 
    fn resize(&mut self, w: f32, h: f32, avoid: Option<(f32, f32)>);
10 
    /// The cursor moved to `(x, y)`, or left the page.
11 
    fn point(&mut self, at: Option<(f32, f32)>);
12 
    /// Move on by `dt` seconds.
13 
    fn step(&mut self, dt: f32);
14 
    /// The marks, 8 floats each (sky::Sky::instances).
15 
    fn instances(&self, c: &Colours, out: &mut Vec<f32>);
16 
    /// The links, 12 floats each (sky::Sky::links).
17 
    fn links(&self, c: &Colours, out: &mut Vec<f32>);
18 
    /// The name a resting cursor shows, and where.
19 
    fn label(&self) -> Option<(&str, f32, f32)>;
20 
    /// Whether a frame would show anything new.
21 
    fn busy(&self) -> bool;
22 
    fn still(&self) -> bool;
23 
    fn size(&self) -> (f32, f32);
24 
}
25
26 
impl Scene for crate::sky::Sky {
27 
    fn resize(&mut self, w: f32, h: f32, avoid: Option<(f32, f32)>) {
28 
        crate::sky::Sky::resize(self, w, h, avoid)
29 
    }
30 
    fn point(&mut self, at: Option<(f32, f32)>) {
31 
        crate::sky::Sky::point(self, at)
32 
    }
33 
    fn step(&mut self, dt: f32) {
34 
        crate::sky::Sky::step(self, dt)
35 
    }
36 
    fn instances(&self, c: &Colours, out: &mut Vec<f32>) {
37 
        crate::sky::Sky::instances(self, c, out)
38 
    }
39 
    fn links(&self, c: &Colours, out: &mut Vec<f32>) {
40 
        crate::sky::Sky::links(self, c, out)
41 
    }
42 
    fn label(&self) -> Option<(&str, f32, f32)> {
43 
        crate::sky::Sky::label(self)
44 
    }
45 
    fn busy(&self) -> bool {
46 
        crate::sky::Sky::busy(self)
47 
    }
48 
    fn still(&self) -> bool {
49 
        self.still
50 
    }
51 
    fn size(&self) -> (f32, f32) {
52 
        (self.w, self.h)
53 
    }
54 
}