added example folder

README.md

@@ -7,7 +7,7 @@ A Rust Cargo crate for finding the distance between a point and a constructive s
 This example finds the distance from a point along a vector to a spherical surface.
 
 ```rust
-use csg_distance::{Point, Vector, CSGSurface};
+use csg_surface_distance::{Point, Vector, CSGSurface};
 
 fn main() {
     let point = Point { x: 1.0, y: 2.0, z: 3.0 };

example_use/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "example_use"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+csg_surface_distance = { path = "../" }

example_use/src/main.rs

@@ -0,0 +1,14 @@
+use csg_surface_distance::{Point, Vector, CSGSurface};
+
+fn main() {
+    let point = Point { x: 1.0, y: 2.0, z: 3.0 };
+    let vector = Vector { dx: 1.0, dy: 0.0, dz: 0.0 };
+
+    let surface = CSGSurface::Sphere { x: 0.0, y: 0.0, z: 0.0, radius: 1.0 };
+
+    if let Some(distance) = surface.distance_to_surface(&point, &vector) {
+        println!("Distance to surface: {}", distance);
+    } else {
+        println!("No intersection with the surface.");
+    }
+}