Add parent ID parameter to node creation functions in Rust and C++

bridge/src/lib.rs

@@ -544,7 +544,8 @@ pub extern "C" fn sdxr_shutdown() {
 }
 
 #[no_mangle]
-pub extern "C" fn sdxr_create_node(name: *const std::os::raw::c_char, mat4: *const f32) -> u64 {
+#[no_mangle]
+pub extern "C" fn sdxr_create_node(name: *const std::os::raw::c_char, mat4: *const f32, parent_id: u64) -> u64 {
     if !STARTED.load(Ordering::SeqCst) { return 0; }
     let name = unsafe { CStr::from_ptr(name) }.to_string_lossy().to_string();
     let m = unsafe { std::slice::from_raw_parts(mat4, 16) };
@@ -554,7 +555,8 @@ pub extern "C" fn sdxr_create_node(name: *const std::os::raw::c_char, mat4: *con
 
     let mut ctrl = CTRL.lock().unwrap();
     let c_id = ctrl.next_id; ctrl.next_id += 1;
-    if let Some(tx) = &ctrl.tx { let _ = tx.send(Command::Create { c_id, name, transform: mat }); }
+    let parent = if parent_id == 0 { None } else { Some(parent_id) };
+    if let Some(tx) = &ctrl.tx { let _ = tx.send(Command::Create { c_id, name, parent, transform: mat }); }
     c_id
 }
 

src/StardustBridge.cpp

@@ -160,7 +160,8 @@ StardustBridge::NodeId StardustBridge::createNode(const std::string& name,
         float m[16];
         // GLM mat4 is column-major; pass as 16 floats as-is
         std::memcpy(m, &transform[0][0], sizeof(m));
-        std::uint64_t rid = m_fnCreateNode(name.c_str(), m);
+        std::uint64_t parentVal = parent.has_value() ? *parent : 0;
+        std::uint64_t rid = m_fnCreateNode(name.c_str(), m, parentVal);
         (void)rid; // Could map to NodeId if Rust returns its own id
     }
     return id;

src/StardustBridge.hpp

@@ -83,7 +83,7 @@ private:
 	using fn_start_t = int(*)(const char*);
 	using fn_poll_t = int(*)();
 	using fn_shutdown_t = void(*)();
-	using fn_create_node_t = std::uint64_t(*)(const char*, const float*);
+	using fn_create_node_t = std::uint64_t(*)(const char*, const float*, std::uint64_t);
 	using fn_update_node_t = int(*)(std::uint64_t, const float*);
 	using fn_remove_node_t = int(*)(std::uint64_t);
 	using fn_set_model_t = int(*)(std::uint64_t, const char*);