Merge branch 'feat/pixels'

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- (Optional) pixelation shader for retro effect
+- (Optional) chromatic aberration shader
+
 ## [0.0.10] - 2023-10-04
 
 ### Added

assets/shaders/chromatic_aberration.wgsl

@@ -0,0 +1,27 @@
+#import bevy_pbr::utils
+#import bevy_core_pipeline::fullscreen_vertex_shader FullscreenVertexOutput
+
+@group(0) @binding(0) var screen_texture: texture_2d<f32>;
+@group(0) @binding(1) var texture_sampler: sampler;
+struct ChromaticAberrationSettings {
+    intensity: f32,
+#ifdef SIXTEEN_BYTE_ALIGNMENT
+    // WebGL2 structs must be 16 byte aligned.
+    _webgl2_padding: vec3<f32>
+#endif
+}
+@group(0) @binding(2) var<uniform> settings: ChromaticAberrationSettings;
+
+@fragment
+fn fragment(in: FullscreenVertexOutput) -> @location(0) vec4<f32> {
+    // Chromatic aberration strength
+    let offset_strength = settings.intensity;
+
+    // Sample each color channel with an arbitrary shift
+    return vec4<f32>(
+        textureSample(screen_texture, texture_sampler, in.uv + vec2<f32>(offset_strength, -offset_strength)).r,
+        textureSample(screen_texture, texture_sampler, in.uv + vec2<f32>(-offset_strength, 0.0)).g,
+        textureSample(screen_texture, texture_sampler, in.uv + vec2<f32>(0.0, offset_strength)).b,
+        1.0
+    );
+}

src/camera.rs

@@ -1,18 +1,36 @@
 use bevy::prelude::*;
 
+#[allow(unused_imports)]
+use crate::shaders::{
+    chromatic_aberration::{ChromaticAberrationPlugin, ChromaticAberrationSettings},
+    pixelate::{PixelatePlugin, PixelateSettings},
+};
+
 use crate::{ship::Ship, state::AppState};
 
 pub struct CameraPlugin;
 impl Plugin for CameraPlugin {
     fn build(&self, app: &mut App) {
+        // app.add_plugins(PixelatePlugin);
+        // app.add_plugins(ChromaticAberrationPlugin);
         app.add_systems(Startup, setup);
         app.add_systems(Update, follow_player.run_if(in_state(AppState::Active)));
     }
 }
 
 fn setup(mut commands: Commands) {
-    // Spawns game camera
-    commands.spawn((Camera2dBundle::default(), Name::new("Main Camera")));
+    commands.spawn((
+        Camera2dBundle::default(),
+        PixelateSettings {
+            block_size: 3.25,
+            ..default()
+        },
+        ChromaticAberrationSettings {
+            intensity: 0.001,
+            ..default()
+        },
+        Name::new("Main Camera"),
+    ));
 }
 
 pub fn follow_player(

src/main.rs

@@ -15,6 +15,7 @@ mod orbit;
 mod pause;
 mod planet;
 mod planetary_system;
+mod shaders;
 mod ship;
 mod star;
 mod state;
@@ -67,7 +68,7 @@ fn main() {
 
     #[cfg(debug_assertions)]
     app.add_plugins((
-        RapierDebugRenderPlugin::default(),
+        // RapierDebugRenderPlugin::default(),
         WorldInspectorPlugin::new(),
     ));