Important Rust Pattern: Inheritance does not exist, use enum to store multiple different types in same Collection

src/main.rs

@@ -95,6 +95,12 @@ struct Plane {
     normal: Vector3,
 }
 
+impl Plane {
+    fn new(point: Point3, normal: Vector3) -> Plane {
+        Plane { point, normal }
+    }
+}
+
 struct Line {
     point: Point3,
     direction: Vector3,
@@ -111,14 +117,22 @@ impl Sphere {
     }
 }
 
+enum Geometry {
+    Sphere(Sphere),
+    Plane(Plane),
+}
+
 fn main() {
     let sphere1 = Sphere::new(Point3::new(0.0, 0.0, 0.0), 25.0);
     let sphere2 = Sphere::new(Point3::new(1.0, -45.4, 3.55), 2.0);
     let sphere3 = Sphere::new(Point3::new(3.0, 2.0, 1.0), 0.5);
 
+    let plane1 = Plane::new(Point3::new(1.0, 2.0, 3.0), Vector3::new(0.0, 1.0, 0.0));
+
     let mut v = Vec::new();
 
-    v.push(sphere1);
-    v.push(sphere2);
-    v.push(sphere3);
+    v.push(Geometry::Sphere(sphere1));
+    v.push(Geometry::Plane(plane1));
+    v.push(Geometry::Sphere(sphere2));
+    v.push(Geometry::Sphere(sphere3));
 }