Add simple Solari example: 3d_scene but with raytracing

Author: qthree

Cargo.toml

@@ -1499,6 +1499,19 @@ description = "Load a cubemap texture onto a cube like a skybox and cycle throug
 category = "3D Rendering"
 wasm = true
 
+[[example]]
+name = "solari_3d_scene"
+path = "examples/3d/solari_3d_scene.rs"
+doc-scrape-examples = true
+required-features = ["bevy_solari"]
+
+[package.metadata.example.solari_3d_scene]
+name = "Solari 3D Scene"
+description = "Simple 3D scene with basic shapes and realtime dynamic raytraced lighting using Bevy Solari"
+category = "3D Rendering"
+# Raytracing is not supported on the web
+wasm = false
+
 [[example]]
 name = "solari"
 path = "examples/3d/solari.rs"
@@ -1509,7 +1522,8 @@ required-features = ["bevy_solari", "https", "free_camera"]
 name = "Solari"
 description = "Demonstrates realtime dynamic raytraced lighting using Bevy Solari."
 category = "3D Rendering"
-wasm = false                                                                        # Raytracing is not supported on the web
+# Raytracing is not supported on the web
+wasm = false
 
 [[example]]
 name = "spherical_area_lights"

examples/3d/solari_3d_scene.rs

@@ -0,0 +1,109 @@
+//! A simple 3D scene with light shining over a cube sitting on a plane.
+//!
+//! This example is intended to demonstrate the bare minimum setup required to enable Solari,
+//! Bevy's real-time raytraced dynamic lighting solution.
+
+use bevy::{
+    camera::CameraMainTextureUsages, color::palettes::css, prelude::*,
+    render::render_resource::TextureUsages, solari::prelude::*,
+};
+
+/// Real-time raytracing produces noisy output because it cannot trace enough rays per pixel in a single frame.
+/// Instead, it distributes work stochastically across frames.
+/// Therefore, a denoiser is required to achieve high-quality image.
+/// DLSS Ray Reconstruction provides hardware-accelerated denoising.
+
+#[cfg(all(feature = "dlss", not(feature = "force_disable_dlss")))]
+use bevy::anti_alias::dlss::{
+    Dlss, DlssProjectId, DlssRayReconstructionFeature, DlssRayReconstructionSupported,
+};
+
+fn main() {
+    let mut app = App::new();
+
+    #[cfg(all(feature = "dlss", not(feature = "force_disable_dlss")))]
+    app.insert_resource(DlssProjectId(bevy_asset::uuid::uuid!(
+        "bd7a4665-6340-46f3-b4f8-c6d0f7101c27" // Don't copy paste this - generate your own UUID!
+    )));
+
+    app.add_plugins(DefaultPlugins)
+        .add_plugins(SolariPlugins)
+        .add_systems(Startup, setup)
+        .run();
+}
+
+/// set up a simple 3D scene
+fn setup(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+    #[cfg(all(feature = "dlss", not(feature = "force_disable_dlss")))] dlss_rr_supported: Option<
+        Res<DlssRayReconstructionSupported>,
+    >,
+) {
+    let cube = meshes.add(
+        Cuboid::from_length(1.0)
+            .mesh()
+            .build()
+            // Solari requires ATTRIBUTE_TANGENT
+            .with_generated_tangents()
+            .expect("Cuboid mesh has ATTRIBUTE_UV_0"),
+    );
+
+    // base
+    commands.spawn((
+        Mesh3d(cube.clone()),
+        RaytracingMesh3d(cube.clone()),
+        MeshMaterial3d(materials.add(StandardMaterial {
+            base_color: css::DARK_GRAY.into(),
+            perceptual_roughness: 0.0,
+            metallic: 0.15,
+            ..default()
+        })),
+        Transform::from_xyz(0.0, -0.1, 0.0).with_scale(Vec3::splat(7.0).with_y(0.2)),
+    ));
+    // cube
+    commands.spawn((
+        Mesh3d(cube.clone()),
+        RaytracingMesh3d(cube.clone()),
+        MeshMaterial3d(materials.add(Color::from(css::LIGHT_BLUE))),
+        Transform::from_xyz(1.0, 0.5, -0.25),
+    ));
+    // emissive light
+    commands.spawn((
+        Mesh3d(cube.clone()),
+        RaytracingMesh3d(cube),
+        MeshMaterial3d(materials.add(StandardMaterial {
+            base_color: css::RED.into(),
+            emissive: LinearRgba::from(css::RED) * 100_000.0,
+            ..default()
+        })),
+        Transform::from_xyz(-1.0, 0.25, 0.25).with_scale(Vec3::splat(0.5)),
+    ));
+    // directional light
+    commands.spawn((
+        DirectionalLight {
+            illuminance: light_consts::lux::HALLWAY,
+            ..default()
+        },
+        Transform::from_xyz(-2.5, 4.5, -3.0).looking_at(Vec3::ZERO, Vec3::Y),
+    ));
+    // camera
+    let mut _camera = commands.spawn((
+        Camera3d::default(),
+        Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
+        CameraMainTextureUsages::default().with(TextureUsages::STORAGE_BINDING),
+        Msaa::Off,
+        SolariLighting::default(),
+    ));
+
+    // Using DLSS Ray Reconstruction for denoising (and cheaper rendering via upscaling) is _highly_ recommended when using Solari
+    #[cfg(all(feature = "dlss", not(feature = "force_disable_dlss")))]
+    if dlss_rr_supported.is_some() {
+        _camera.insert(Dlss::<DlssRayReconstructionFeature> {
+            perf_quality_mode: Default::default(),
+            reset: Default::default(),
+            _phantom_data: Default::default(),
+        });
+    }
+}

examples/README.md

@@ -193,6 +193,7 @@ Example | Description
 [Shadow Biases](../examples/3d/shadow_biases.rs) | Demonstrates how shadow biases affect shadows in a 3d scene
 [Shadow Caster and Receiver](../examples/3d/shadow_caster_receiver.rs) | Demonstrates how to prevent meshes from casting/receiving shadows in a 3d scene
 [Skybox](../examples/3d/skybox.rs) | Load a cubemap texture onto a cube like a skybox and cycle through different compressed texture formats.
+[Solari 3D Scene](../examples/3d/solari_3d_scene.rs) | Simple 3D scene with basic shapes and realtime dynamic raytraced lighting using Bevy Solari
 [Solari](../examples/3d/solari.rs) | Demonstrates realtime dynamic raytraced lighting using Bevy Solari.
 [Specular Tint](../examples/3d/specular_tint.rs) | Demonstrates specular tints and maps
 [Spherical Area Lights](../examples/3d/spherical_area_lights.rs) | Demonstrates how point light radius values affect light behavior