diff options
| -rw-r--r-- | core/java/android/hardware/SensorManager.java | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/core/java/android/hardware/SensorManager.java b/core/java/android/hardware/SensorManager.java index dd4096bf05e3..2111ccedbc39 100644 --- a/core/java/android/hardware/SensorManager.java +++ b/core/java/android/hardware/SensorManager.java @@ -2051,8 +2051,8 @@ public class SensorManager if (rv.length == 4) { Q[0] = rv[3]; } else { - //In this case, the w component of the quaternion is known to be a positive number - Q[0] = (float)Math.sqrt(1 - rv[0]*rv[0] - rv[1]*rv[1] - rv[2]*rv[2]); + Q[0] = 1 - rv[0]*rv[0] - rv[1]*rv[1] - rv[2]*rv[2]; + Q[0] = (Q[0] > 0) ? (float)Math.sqrt(Q[0]) : 0; } Q[1] = rv[0]; Q[2] = rv[1]; |