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
// Point-light schema.
/// A spherical point light with quadratic distance attenuation.
///
/// The forward renderer lights every surface from all declared point lights (up
/// to a large per-scene budget). Secondary effects (volumetric fog, SDF
/// raymarching, and reflection-probe capture) still consider only the first 8.
///
/// ```rust
/// # use concinnity_core::components::PointLight;
/// PointLight {
/// position: [2.0, 2.5, -3.0],
/// color: [1.0, 0.8, 0.5],
/// intensity: 8.0,
/// range: 6.0,
/// ..Default::default()
/// };
/// ```
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
#[serde(default)]
pub struct PointLight {
/// World-space position of the light source.
pub position: [f32; 3],
/// Linear-space RGB colour of the light.
pub color: [f32; 3],
/// Intensity multiplier applied to the colour.
pub intensity: f32,
/// Maximum reach in world units; attenuation is zero at this distance.
pub range: f32,
}
impl Default for PointLight {
fn default() -> Self {
Self {
position: [0.0, 2.5, 0.0],
color: [1.0, 1.0, 1.0],
intensity: 8.0,
range: 6.0,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn the_default_lamp_hangs_above_head_height_with_a_room_sized_reach() {
let l = PointLight::default();
assert_eq!(l.position, [0.0, 2.5, 0.0]);
assert_eq!(l.color, [1.0, 1.0, 1.0]);
assert_eq!(l.intensity, 8.0);
assert_eq!(l.range, 6.0);
}
#[test]
fn an_authored_lamp_parses_and_round_trips_through_postcard() {
let l: PointLight = serde_json::from_str(
r#"{"position":[2,2.5,-3],"color":[1,0.8,0.5],"intensity":12,"range":9}"#,
)
.unwrap();
assert_eq!(l.position, [2.0, 2.5, -3.0]);
assert_eq!(l.color, [1.0, 0.8, 0.5]);
let bytes = postcard::to_allocvec(&l).unwrap();
let back: PointLight = postcard::from_bytes(&bytes).unwrap();
assert_eq!(back.intensity, 12.0);
assert_eq!(back.range, 9.0);
}
}