fix: P3D model info names after property_frequent

arma-file-formats/src/real_virtuality/p3d/model_info.rs

@@ -127,7 +127,12 @@ pub struct ModelInfo {
     pub property_frequent: bool,
 
     #[br(if(args.version >= 31))]
-    pub unknown_int: u32,
+    unknown_string_count: u32,
+
+    /// Names after a count, usually none. Only seen in FFAA's `invisibletargetvehicle.p3d`
+    /// (`component01`), every Arma 3 model has a count of 0.
+    #[br(count = unknown_string_count)]
+    pub unknown_strings: Vec<NullString>,
 
     #[br(if(args.version >= 57))]
     #[br(count = lod_count)]

arma-file-formats/tests/real_virtuality/p3d_test.rs

@@ -173,3 +173,30 @@ fn section_unk_floats() {
         assert!(lod.section_faces().iter().all(Option::is_some));
     }
 }
+
+/// The u32 after `property_frequent` counts names that follow it, a model with one used to throw
+/// off everything after it.
+#[test]
+fn model_info_unknown_strings() {
+    let odol = ODOL::from_path(format!(
+        "{}ffaa_invisibletargetvehicle.p3d",
+        INPUT_PATH_PREFIX
+    ))
+    .unwrap();
+    assert_eq!(odol.version, 73);
+    let strings: Vec<String> = odol
+        .model_info
+        .unknown_strings
+        .iter()
+        .map(ToString::to_string)
+        .collect();
+    assert_eq!(strings, ["component01"]);
+    assert_eq!(odol.lods.len(), 4);
+    assert_eq!(odol.has_anims, Some(false));
+
+    for (name, odol) in test_models() {
+        if name != "ffaa_invisibletargetvehicle.p3d" {
+            assert!(odol.model_info.unknown_strings.is_empty(), "{name}");
+        }
+    }
+}