det               119 src/mesh/CylinderMesh.cpp     float det = vector1.x() * vector2.y() - vector1.y() * vector2.x();
det               120 src/mesh/CylinderMesh.cpp     RECORD_INFO(string("angle =>") + to_string(atan2(det, dot)));
det               121 src/mesh/CylinderMesh.cpp     return atan2(det, dot);