docs: run doctests against README

Author: cbgbt

README.md

@@ -21,16 +21,16 @@ The following Rust code draws the cube which is included as an example in the
 original `ln` repo.
 
 ```rust
-use raydeon::shapes::RectPrism;
+use raydeon::shapes::AxisAlignedCuboid;
 use raydeon::{Camera, Scene, WPoint3, WVec3};
 use std::sync::Arc;
 
-fn main() {
-    env_logger::Builder::from_default_env()
-        .format_timestamp_nanos()
-        .init();
+env_logger::Builder::from_default_env()
+    .format_timestamp_nanos()
+    .init();
 
-    let scene = Scene::new(vec![Arc::new(RectPrism::new(
+fn main() {
+    let scene = Scene::new(vec![Arc::new(AxisAlignedCuboid::new(
         WVec3::new(-1.0, -1.0, -1.0),
         WVec3::new(1.0, 1.0, 1.0),
     ))]);
@@ -45,7 +45,7 @@ fn main() {
     let znear = 0.1;
     let zfar = 10.0;
 
-    let camera = Camera::look_at(eye, focus, up).perspective(fovy, width, height, znear, zfar);
+    let camera = Camera::new().look_at(eye, focus, up).perspective(fovy, width, height, znear, zfar);
 
     let paths = scene.attach_camera(camera).render();
 

raydeon/src/lib.rs

@@ -1,3 +1,4 @@
+#[doc = include_str!("../../README.md")]
 pub(crate) mod bvh;
 pub mod camera;
 pub mod path;