Merge pull request #1 from DavidVonDerau/dvd/bugfix

Assume default texture is always in use.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "merged_lands"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 rust-version = "1.64.0"
 build = "build.rs"

src/land/textures.rs

@@ -100,6 +100,8 @@ impl RemappedTextures {
 
     /// Creates a new [RemappedTextures] from the `used_ids`.
     pub fn from(used_ids: &[bool]) -> Self {
+        assert!(used_ids[0]);
+
         let mut new = Self::with_capacity(used_ids.len());
 
         for (new_id, (idx, _)) in used_ids
@@ -234,6 +236,7 @@ impl KnownTextures {
         remapped_textures: &mut RemappedTextures,
     ) {
         let (old_id, new_id) = self.add_texture(plugin, texture);
+        assert_ne!(IndexVTEX::from(new_id).0, 0);
         if remapped_textures
             .inner
             .insert(old_id.into(), new_id.into())

src/repair/cleaning.rs

@@ -58,6 +58,7 @@ pub fn clean_known_textures(
     // Reserve extra texture index for the default 0th texture.
 
     let mut used_ids = vec![false; known_textures.len() + 1];
+    used_ids[0] = true; // Assume the default texture is in use.
     for (_, land) in landmass.sorted() {
         let Some(texture_indices) = land.texture_indices.as_ref() else {
             continue;