move configure() responsibility a bit

src/lib.rs

@@ -2,7 +2,7 @@
 
 use std::{convert::identity, error::Error, f32::consts::PI};
 
-use glam::{Mat4, UVec2, Vec3, uvec2, vec3};
+use glam::{Mat4, UVec2, Vec3, vec3};
 
 use crate::{
 	camera::OrbitalCamera,
@@ -79,15 +79,13 @@ impl Core {
 		let tripod = new_tripod(&device);
 		queue.submit([]); // flush buffer updates
 
-		let mut this = Self {
+		Self {
 			device,
 			queue,
 			surface,
 			pipeline,
 			tripod,
-		};
+		}
-		this.configure(uvec2(1, 1)); // ensure we always have a valid surface to work with
-		this
 	}
 
 	fn render(&self, output: &wgpu::Texture) {

src/main.rs

@@ -26,7 +26,8 @@ impl MainWindow {
 			instance.create_surface(Arc::clone(&window))
 		}))
 		.unwrap();
-		let core = Core::new(gpu);
+		let mut core = Core::new(gpu);
+		core.configure(uvec2(1, 1));
 		Self { window, core }
 	}