feat: upgrade to bevy 0.4

Cargo.toml

@@ -7,6 +7,6 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-bevy = "0.3"
+bevy = "0.4"
 num-complex = "0.3"
 rayon = "1.5"

src/main.rs

@@ -1,4 +1,5 @@
-use bevy::{prelude::*, render::texture::TextureFormat};
+use bevy::prelude::*;
+use bevy::render::texture::{Extent3d, TextureDimension, TextureFormat};
 use mandelbrot::Mandelbrot;
 use std::time::Instant;
 
@@ -33,11 +34,7 @@ impl Default for SpriteScale {
     }
 }
 
-fn transform_mandelbrot_system(
+fn transform_mandelbrot_system(input: Res<Input<KeyCode>>, mut scale: ResMut<SpriteScale>) {
-    input: Res<Input<KeyCode>>,
-    mut scale: ResMut<SpriteScale>,
-    // camera: Res<Camera>,
-) {
     let zoom = input.pressed(KeyCode::Q) as i8 - input.pressed(KeyCode::E) as i8;
     let horizontal = input.pressed(KeyCode::D) as i8 - input.pressed(KeyCode::A) as i8;
     let vertical = input.pressed(KeyCode::W) as i8 - input.pressed(KeyCode::S) as i8;
@@ -90,13 +87,13 @@ fn mandelbrot_render_system(
                     let v = scale.verti;
                     let iters = scale.iterations;
 
-                    let start = Instant::now();
+                    let buf = fractal.generate_scaled_image(
-                    texture.data.copy_from_slice(fractal.generate_scaled_image(
                         ((-2.5 * z) + h, (1.0 * z) + h),
                         ((-1.0 * z) - v, (1.0 * z) - v),
                         iters,
-                    ));
+                    );
-                    let _diff = Instant::now() - start;
+
+                    texture.data.copy_from_slice(buf);
                 }
             }
         }
@@ -104,22 +101,24 @@ fn mandelbrot_render_system(
 }
 
 fn startup(
-    mut commands: Commands,
+    commands: &mut Commands,
     mut textures: ResMut<Assets<Texture>>,
     mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
-    let img_size = Vec2::new(Mandelbrot::width() as f32, Mandelbrot::height() as f32);
+    let img_size = Extent3d::new(Mandelbrot::width() as u32, Mandelbrot::height() as u32, 1);
+    let dimension = TextureDimension::D2;
     let img_buf = Mandelbrot::new().generate_image().to_vec();
 
     let texture_handle = textures.add(Texture::new(
         img_size,
+        dimension,
         img_buf,
         TextureFormat::Rgba8UnormSrgb,
     ));
 
     commands
-        .spawn(Camera2dComponents::default())
+        .spawn(Camera2dBundle::default())
-        .spawn(SpriteComponents {
+        .spawn(SpriteBundle {
             material: materials.add(texture_handle.into()),
             ..Default::default()
         })