Fix bevy_mesh_to_landmass_mesh requiring "inverted" faces.

CHANGELOG.md

@@ -6,6 +6,12 @@
 
 ### Migration Guide
 
+## `bevy_landmass` [0.11.1] - 2026-02-21
+
+### Fixes
+
+- `bevy_mesh_to_landmass_nav_mesh` now correctly orients faces.
+
 ## `bevy_landmass` [0.11.0] / `landmass_rerecast` [0.2.0] - 2026-01-29
 
 ### Migration Guide

crates/bevy_landmass/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bevy_landmass"
-version = "0.11.0"
+version = "0.11.1"
 edition = "2024"
 
 description = "A plugin for Bevy to handle navigation of AI characters."

crates/bevy_landmass/src/nav_mesh.rs

@@ -45,10 +45,12 @@ pub fn bevy_mesh_to_landmass_nav_mesh<CS: CoordinateSystem>(
       assert!(indices.len() % 3 == 0);
       let mut polygons = Vec::with_capacity(indices.len() / 3);
       for i in (0..indices.len()).step_by(3) {
+        let (b, c) =
+          if CS::FLIP_POLYGONS { (i + 2, i + 1) } else { (i + 1, i + 2) };
         polygons.push(vec![
           indices[i] as usize,
-          indices[i + 1] as usize,
-          indices[i + 2] as usize,
+          indices[b] as usize,
+          indices[c] as usize,
         ]);
       }
       polygons
@@ -57,10 +59,12 @@ pub fn bevy_mesh_to_landmass_nav_mesh<CS: CoordinateSystem>(
       assert!(indices.len() % 3 == 0);
       let mut polygons = Vec::with_capacity(indices.len() / 3);
       for i in (0..indices.len()).step_by(3) {
+        let (b, c) =
+          if CS::FLIP_POLYGONS { (i + 2, i + 1) } else { (i + 1, i + 2) };
         polygons.push(vec![
           indices[i] as usize,
-          indices[i + 1] as usize,
-          indices[i + 2] as usize,
+          indices[b] as usize,
+          indices[c] as usize,
         ]);
       }
       polygons

crates/bevy_landmass/src/nav_mesh_test.rs

@@ -105,15 +105,17 @@ fn converts_u32_indices() {
     ]
   );
 
+  // ThreeD sets `FLIP_POLYGONS`, so the polygons end up flipped here (and then
+  // flipped back during validation).
   assert_eq!(
     nav_mesh.polygons,
     vec![
-      vec![0, 1, 2],
-      vec![2, 3, 0],
-      vec![3, 2, 4],
-      vec![3, 4, 5],
-      vec![4, 2, 6],
-      vec![4, 6, 7],
+      vec![0, 2, 1],
+      vec![2, 0, 3],
+      vec![3, 4, 2],
+      vec![3, 5, 4],
+      vec![4, 6, 2],
+      vec![4, 7, 6],
     ]
   );
 }