Vendor dependencies for 0.3.0 release

vendor/bevy/examples/2d/mesh2d.rs

@@ -0,0 +1,24 @@
+//! Shows how to render a polygonal [`Mesh`], generated from a [`Rectangle`] primitive, in a 2D scene.
+
+use bevy::{color::palettes::basic::PURPLE, prelude::*};
+
+fn main() {
+    App::new()
+        .add_plugins(DefaultPlugins)
+        .add_systems(Startup, setup)
+        .run();
+}
+
+fn setup(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<ColorMaterial>>,
+) {
+    commands.spawn(Camera2d);
+
+    commands.spawn((
+        Mesh2d(meshes.add(Rectangle::default())),
+        MeshMaterial2d(materials.add(Color::from(PURPLE))),
+        Transform::default().with_scale(Vec3::splat(128.)),
+    ));
+}