When updating tangent space, support packed/octa normals

- only for certain formats where i have seem them used
- whether they are used is dependent on the mod specifying a snapshot profile that it used
- LLM helped me decode these formats, not exactly sure what the difference is, but there is a difference

Author: jmquigs

Native/mod_load/Cargo.toml

@@ -11,11 +11,16 @@ winapi = { version = "0.3", features = ["libloaderapi", "d3d9", "objidlbase",
     "processthreadsapi", "memoryapi", "winerror", "winuser", "winreg",
     "dinput"] }
 
+[features]
+default = []             
+tangent_debug = ["glam"]
+
 [dependencies]
 fnv = "1.0.6"
 shared_dx = { path = "../shared_dx" }
 util = { path = "../util" }
 global_state = { path = "../global_state" }
 types = { path = "../types" }
 d3dx = { path = "../d3dx" }
-device_state = { path = "../device_state" }
+device_state = { path = "../device_state" }
+glam = { version = "*", optional = true }

Native/mod_load/src/mod_load.rs

@@ -350,7 +350,8 @@ pub unsafe fn load_d3d_data11(device: *mut ID3D11Device, callbacks: interop::Man
     }
 
     let mod_ts_update = (*mdat).update_tangent_space;
-    let _ = mod_vector::update_normals(vb_data.as_mut_ptr(), &nmd.name, mod_ts_update, vert_count, &vlayout)
+    let profile = nmd.mod_data.mod_snap_profile; // copy this out, since nmd mutably borrowed, can't pass it as readonly
+    let _ = mod_vector::update_normals(vb_data.as_mut_ptr(), &nmd.name, profile, mod_ts_update, vert_count, &vlayout)
         .map_err(|e| {
             write_log_file(&format!("Warning: failed to update normals: {:?}", e));
         });