NifModel: new function to check for Starfield internal geometry format

src/model/nifmodel.cpp

@@ -1824,6 +1824,30 @@ class spMeshFileImport
 	static bool processAllItems( NifModel * nif );
 };
 
+bool NifModel::checkInternalGeometry( const QModelIndex & blockIndex )
+{
+	if ( !blockIndex.isValid() ) {
+		int	n = getBlockCount();
+		for ( int i = 0; i < n; i++ ) {
+			QModelIndex	b = getBlockIndex( i );
+			if ( isNiBlock( b, "BSGeometry" ) && !checkInternalGeometry( b ) )
+				return false;
+		}
+		return true;
+	}
+	if ( !isNiBlock( blockIndex, "BSGeometry" ) )
+		return true;
+	if ( get<quint32>( blockIndex, "Flags" ) & 0x0200 )
+		return true;
+	if ( QMessageBox::question( parentWindow, tr( "NifSkope warning" ),
+								tr( "This operation can only be performed on internal geometry. Convert meshes?" ) )
+		!= QMessageBox::Yes ) {
+		return false;
+	}
+	spMeshFileImport::processAllItems( this );
+	return bool( get<quint32>( blockIndex, "Flags" ) & 0x0200 );
+}
+
 bool NifModel::load( QIODevice & device, const char* fileName )
 {
 	QSettings settings;

src/model/nifmodel.h

@@ -97,6 +97,8 @@ class NifModel final : public BaseModel
 	// BaseModel
 
 	void clear() override final;
+	//! Check if a Starfield model uses internal geometry data, and optionally convert meshes. Returns true on success.
+	bool checkInternalGeometry( const QModelIndex & blockIndex );
 	bool load( QIODevice & device, const char* fileName = nullptr ) override final;
 	bool save( QIODevice & device ) const override final;