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atmosphere: set dynamic fog density based on altitude

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This commit is contained in:
yuni 2024-11-29 19:48:50 +01:00
parent a98c1d3d3a
commit 5dd2936e52
2 changed files with 24 additions and 6 deletions
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24
src/camera.rs
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@ -16,7 +16,7 @@ use crate::prelude::*;
use bevy::core_pipeline::bloom::{BloomCompositeMode, BloomSettings};
use bevy::core_pipeline::tonemapping::Tonemapping;
use bevy::input::mouse::{MouseMotion, MouseWheel};
use bevy::pbr::{CascadeShadowConfigBuilder, DirectionalLightShadowMap};
use bevy::pbr::{CascadeShadowConfigBuilder, DirectionalLightShadowMap, VolumetricFogSettings, VolumetricLight};
use bevy::prelude::*;
use bevy::transform::TransformSystem;
use bevy::window::PrimaryWindow;
@ -33,6 +33,7 @@ impl Plugin for CameraPlugin {
app.add_systems(Startup, setup_camera);
app.add_systems(Update, handle_input.run_if(in_control).run_if(game_running));
app.add_systems(Update, tweak_scene);
app.add_systems(Update, update_volumetric_fog);
app.add_systems(
Update,
update_map_only_object_visibility
@ -148,7 +149,8 @@ pub fn setup_camera(
transform: Transform::from_xyz(0.0, 0.0, 8.0).looking_at(Vec3::ZERO, Vec3::Y),
..default()
},
bevy::pbr::VolumetricFogSettings {
VolumetricFogSettings {
fog_color: Color::srgb(0.78, 0.76, 0.7),
// This value is explicitly set to 0 since we have no environment map light
ambient_intensity: 0.0,
absorption: 0.1,
@ -810,6 +812,22 @@ fn tweak_scene(
for (light, mut directional_light) in lights.iter_mut() {
// Shadows are needed for volumetric lights to work.
directional_light.shadows_enabled = true;
commands.entity(light).insert(bevy::pbr::VolumetricLight);
commands.entity(light).insert(VolumetricLight);
}
}
pub fn update_volumetric_fog(settings: Res<Settings>, mut q_fog: Query<&mut VolumetricFogSettings>) {
let mut fog = if let Ok(x) = q_fog.get_single_mut() {
x
} else {
return;
};
if let Some(x) = settings.atmo_altitude {
// exponential regression with [(-1e5, 1.0), (0, 0.2), (20e5, 0.01)]
let density = 0.2 * 0.9999839f32.powf(x as f32);
fog.density = density;
} else {
fog.density = 0.0;
}
}

6
src/visual.rs
View file

@ -11,7 +11,7 @@
// This module manages visual effects.
use crate::prelude::*;
use bevy::pbr::NotShadowReceiver;
//use bevy::pbr::NotShadowReceiver;
use bevy::prelude::*;
use bevy_xpbd_3d::prelude::*;
use std::time::Duration;
@ -103,8 +103,8 @@ pub fn setup(
mut commands: Commands,
mut ew_effect: EventWriter<SpawnEffectEvent>,
mut graphs: ResMut<Assets<AnimationGraph>>,
mut materials: ResMut<Assets<StandardMaterial>>,
mut meshes: ResMut<Assets<Mesh>>,
//mut materials: ResMut<Assets<StandardMaterial>>,
//mut meshes: ResMut<Assets<Mesh>>,
) {
if !settings.dev_mode {
ew_effect.send(SpawnEffectEvent {