From 36c16d053e46ec6ab94f6847533db1196a74a427 Mon Sep 17 00:00:00 2001
From: Stephan Rehfeld <stephan.rehfeld@th-nuernberg.de>
Date: Wed, 27 May 2026 18:27:00 +0200
Subject: [PATCH] We can create Polymorphism using enums

---
 src/geometry.rs | 16 ++++++++++++++++
 src/main.rs     |  3 +++
 2 files changed, 19 insertions(+)

diff --git a/src/geometry.rs b/src/geometry.rs
index 4597a75..dd7306b 100644
--- a/src/geometry.rs
+++ b/src/geometry.rs
@@ -33,6 +33,22 @@ pub enum Geometry {
     Line(Line),
 }
 
+impl Geometry {
+    pub fn greet(&self) {
+        match self {
+            Geometry::Sphere(_) => {
+                println!("Sphere!");
+            }
+            Geometry::Line(_) => {
+                println!("Line!");
+            }
+            Geometry::Plane(_) => {
+                println!("Plane!");
+            }
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/main.rs b/src/main.rs
index 7181bf2..79df7ab 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -61,6 +61,9 @@ impl RenderableGeometry {
 fn main() {
     let tex = Rc::new(Texture::load_texture());
 
+    let sphere = Geometry::Sphere(Sphere::new(Point3::new(0.0, 0.0, 0.0), 1.0));
+    sphere.greet();
+
     let geo1 = RenderableGeometry::new(
         Mat4x4::ident(),
         Geometry::Sphere(Sphere::new(Point3::new(0.0, 0.0, 0.0), 1.0)),