d836ece676
# Objective Follow up from PR #12369 to extract lighting structs from light/mod.rs into their own file. Part of the Purdue Refactoring Team's goals issue #12349 ## Solution - Moved PointLight from light/mod.rs to light/point_light.rs - Moved SpotLight from light/mod.rs to light/spot_light.rs - Moved DirectionalLight from light/mod.rs to light/directional_light.rs
58 lines
2.4 KiB
Rust
58 lines
2.4 KiB
Rust
use super::*;
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/// A light that emits light in a given direction from a central point.
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/// Behaves like a point light in a perfectly absorbent housing that
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/// shines light only in a given direction. The direction is taken from
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/// the transform, and can be specified with [`Transform::looking_at`](Transform::looking_at).
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#[derive(Component, Debug, Clone, Copy, Reflect)]
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#[reflect(Component, Default)]
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pub struct SpotLight {
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pub color: Color,
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/// Luminous power in lumens, representing the amount of light emitted by this source in all directions.
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pub intensity: f32,
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pub range: f32,
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pub radius: f32,
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pub shadows_enabled: bool,
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pub shadow_depth_bias: f32,
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/// A bias applied along the direction of the fragment's surface normal. It is scaled to the
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/// shadow map's texel size so that it can be small close to the camera and gets larger further
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/// away.
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pub shadow_normal_bias: f32,
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/// Angle defining the distance from the spot light direction to the outer limit
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/// of the light's cone of effect.
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/// `outer_angle` should be < `PI / 2.0`.
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/// `PI / 2.0` defines a hemispherical spot light, but shadows become very blocky as the angle
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/// approaches this limit.
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pub outer_angle: f32,
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/// Angle defining the distance from the spot light direction to the inner limit
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/// of the light's cone of effect.
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/// Light is attenuated from `inner_angle` to `outer_angle` to give a smooth falloff.
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/// `inner_angle` should be <= `outer_angle`
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pub inner_angle: f32,
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}
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impl SpotLight {
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pub const DEFAULT_SHADOW_DEPTH_BIAS: f32 = 0.02;
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pub const DEFAULT_SHADOW_NORMAL_BIAS: f32 = 1.8;
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}
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impl Default for SpotLight {
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fn default() -> Self {
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// a quarter arc attenuating from the center
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Self {
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color: Color::WHITE,
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// 1,000,000 lumens is a very large "cinema light" capable of registering brightly at Bevy's
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// default "very overcast day" exposure level. For "indoor lighting" with a lower exposure,
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// this would be way too bright.
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intensity: 1_000_000.0,
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range: 20.0,
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radius: 0.0,
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shadows_enabled: false,
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shadow_depth_bias: Self::DEFAULT_SHADOW_DEPTH_BIAS,
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shadow_normal_bias: Self::DEFAULT_SHADOW_NORMAL_BIAS,
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inner_angle: 0.0,
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outer_angle: std::f32::consts::FRAC_PI_4,
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}
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}
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}
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