Allow shadows to be toggled on a per light basis

Cargo.toml

@@ -26,7 +26,7 @@ bevy = { version = "0.14", default-features = false, features = [
     "bevy_winit",
     "bevy_sprite",
     "png",
-    "x11",
+    "x11"
 ] }
 
 [lints.clippy]

examples/dungeon.rs

@@ -74,6 +74,7 @@ fn spawn_candles(mut commands: Commands, spritesheet: Res<CandleSpritesheet>) {
                 color: Color::Srgba(YELLOW),
                 intensity: 25.0,
                 falloff: 4.0,
+                ..default()
             },
             ..default()
         },))

examples/multiple.rs

@@ -43,6 +43,7 @@ fn setup(mut commands: Commands) {
             radius: 50.,
             intensity: 5.0,
             falloff: 5.0,
+            ..default()
         },
         transform: Transform::from_xyz(25., 50., 0.),
         ..default()

examples/occlusion.rs

@@ -17,6 +17,7 @@ fn setup(mut commands: Commands) {
             intensity: 20.0,
             radius: 1000.0,
             falloff: 10.0,
+            cast_shadows: true,
             ..default()
         },
         transform: Transform {

src/light.rs

@@ -32,6 +32,8 @@ pub struct PointLight2d {
     /// How quickly illumination from the light should deteriorate over distance.
     /// A higher falloff value will result in less illumination at the light's maximum radius.
     pub falloff: f32,
+    /// Whether the light should cast shadows.
+    pub cast_shadows: bool,
 }
 
 impl Default for PointLight2d {
@@ -42,6 +44,7 @@ impl Default for PointLight2d {
             intensity: 1.0,
             radius: 0.5,
             falloff: 0.0,
+            cast_shadows: false,
         }
     }
 }

src/render/extract.rs

@@ -15,6 +15,7 @@ pub struct ExtractedPointLight2d {
     pub color: LinearRgba,
     pub intensity: f32,
     pub falloff: f32,
+    pub cast_shadows: u32,
 }
 
 #[derive(Component, Default, Clone, ShaderType)]
@@ -42,6 +43,7 @@ pub fn extract_point_lights(
             radius: point_light.radius,
             intensity: point_light.intensity,
             falloff: point_light.falloff,
+            cast_shadows: if point_light.cast_shadows { 1 } else { 0 },
         });
     }
 
@@ -53,6 +55,7 @@ pub fn extract_point_lights(
         radius: 0.0,
         falloff: 0.0,
         color: LinearRgba::BLACK,
+        cast_shadows: 0,
     });
 }
 

src/render/light_map/light_map.wgsl

@@ -60,7 +60,7 @@ fn fragment(in: FullscreenVertexOutput) -> @location(0) vec4<f32> {
         if dist < light.radius {
             let raymarch = raymarch(pos, light.center);
 
-            if raymarch > 0.0 {
+            if raymarch > 0.0 || light.cast_shadows == 0 {
                 lighting_color += light.color.rgb * attenuation(light, dist);
             }
         }

src/render/types.wgsl

@@ -14,5 +14,6 @@ struct PointLight2d {
     radius: f32,
     color: vec4<f32>,
     intensity: f32,
-    falloff: f32
+    falloff: f32,
+    cast_shadows: u32
 }