expose all nav areas

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sourcenav"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Robin Appelman <robin@icewind.nl>"]
 edition = "2018"
 description = "parsing of SourceEngine .nav files"

src/lib.rs

@@ -113,6 +113,26 @@ impl NavTree {
             }
         })
     }
+
+    /// Get all navigation areas from the nav file
+    ///
+    /// ## Examples
+    ///
+    /// ```no_run
+    /// use sourcenav::get_area_tree;
+    ///
+    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
+    /// let file = std::fs::read("path/to/navfile.nav")?;
+    /// let tree = get_area_tree(file)?;
+    /// for area in tree.areas() {
+    ///     println!("area: {}", area.id)
+    /// }
+    /// # Ok(())
+    /// # }
+    /// ```
+    pub fn areas(&self) -> impl Iterator<Item = &NavArea> {
+        self.0.iter().map(|(_, (area, _))| area)
+    }
 }
 
 #[test]

src/navmesh.rs

@@ -1,6 +1,8 @@
 use aabb_quadtree::Spatial;
 use bitbuffer::{BitRead, BitReadStream, Endianness, ReadError};
 use euclid::{TypedPoint2D, TypedRect, TypedSize2D};
+use std::fmt;
+use std::fmt::Debug;
 use std::ops::Index;
 
 /// A 3 dimensional coordinate
@@ -11,6 +13,12 @@ pub struct Vector3(pub f32, pub f32, pub f32);
 #[derive(Debug, BitRead, Clone, Copy, Eq, PartialEq)]
 pub struct NavAreaId(u32);
 
+impl fmt::Display for NavAreaId {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(&self.0, f)
+    }
+}
+
 /// A navigation area from the nav file
 #[derive(Debug)]
 pub struct NavArea {