我一直在努力理解这两行代码SensorManager.getRotationMatrix(RTmp,I,grav,mag);SensorManager.remapCoordinateSystem(RTmp,SensorManager.AXIS_X,SensorManager.AXIS_MINUS_Z,Rot);我读了thedocumentationofremapCoordinateSystem(),但是我迷路了。谁能给我解释一下getRotationMatrix和remapCoordinateSystem到底做了什么?特别是SensorManager.AXIS_X、SensorMana