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
// Scene marker schema.
use crate::ecs::asset_id::AssetId;
use crate::ecs::asset_id::de_opt_asset_ref;
/// A named group of world content.
///
/// [Prop](#prop)s belong to a Scene by naming convention: props whose `name`
/// begins with `<scene_name>_` are associated with that Scene. Props not
/// prefixed by any scene name are visible in every scene.
///
/// The first declared Scene is active at world start. Scene changes are driven
/// by actions: a UI `scene:<name>` action ([HitRegion](#hitregion) /
/// [KeyBinding](#keybinding)) or a [Behavior](#behavior) scene node jumps to
/// the named scene, with the transition ("Cut" or "FadeBlack") declared on the
/// jump.
#[derive(Debug, Default, Clone, serde::Serialize, serde::Deserialize)]
#[serde(default)]
pub struct Scene {
/// Asset identity; injected via `inject_name`. Not part of `args`.
#[serde(skip)]
pub asset_id: AssetId,
/// A [CameraShot](#camerashot) or [Camera3D](#camera3d) to activate when
/// this scene becomes active. `None` keeps the current camera unchanged.
#[serde(deserialize_with = "de_opt_asset_ref")]
pub camera_shot: Option<AssetId>,
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn a_scene_with_no_shot_leaves_the_camera_where_it_is() {
let s = Scene::default();
assert!(s.camera_shot.is_none());
assert_eq!(s.asset_id, AssetId::default());
assert!(
serde_json::from_str::<Scene>("{}")
.unwrap()
.camera_shot
.is_none()
);
}
#[test]
fn a_named_shot_parses_and_round_trips_through_postcard() {
crate::test_support::install_resolvers();
let s: Scene = serde_json::from_str(r#"{"camera_shot":"establishing"}"#).unwrap();
assert_eq!(s.camera_shot, Some(AssetId(12)));
let bytes = postcard::to_allocvec(&s).unwrap();
let back: Scene = postcard::from_bytes(&bytes).unwrap();
assert_eq!(back.camera_shot, Some(AssetId(12)));
assert_eq!(back.asset_id, AssetId::default());
}
}