diff options
| -rw-r--r-- | core/java/android/hardware/SensorManager.java | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/core/java/android/hardware/SensorManager.java b/core/java/android/hardware/SensorManager.java index cc82170..b1a9349 100644 --- a/core/java/android/hardware/SensorManager.java +++ b/core/java/android/hardware/SensorManager.java @@ -1970,7 +1970,8 @@ public class SensorManager if (rotationVector.length == 4) { q0 = rotationVector[3]; } else { - q0 = (float)Math.sqrt(1 - q1*q1 - q2*q2 - q3*q3); + q0 = 1 - q1*q1 - q2*q2 - q3*q3; + q0 = (q0 > 0) ? (float)Math.sqrt(q0) : 0; } float sq_q1 = 2 * q1 * q1; |