Fix typo in atlasSimbicon app: _idx --> _index
Fix typo in atlasSimbicon app: _idx --> _index
dartsim/dart,axeisghost/DART6motionBlur,axeisghost/DART6motionBlur,dartsim/dart,dartsim/dart,dartsim/dart,axeisghost/DART6motionBlur,dartsim/dart