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2014/10/16 ¤W¤È 08:10:00
android Programming Glossary: anglesHow to get the rotation between accelerometer's axis and motion vector? http://stackoverflow.com/questions/10207044/how-to-get-the-rotation-between-accelerometers-axis-and-motion-vector the accelerometer readings to turn them into rotation angles or a matrix . Such a method has to avoid integrating the acceleration..
How To Create a Rotating Wheel Control? http://stackoverflow.com/questions/10222730/how-to-create-a-rotating-wheel-control where user releases.After getting difference of the two angles rotated the image of that angle.After rotating the image checked..
How to apply 3d transition between two activities in android? http://stackoverflow.com/questions/11069250/how-to-apply-3d-transition-between-two-activities-in-android that rotates the view on the Y axis between two specified angles. This animation also adds a translation on the Z axis depth.. is defined by its start angle and its end angle. Both angles are in degrees. The rotation is performed around a center point..
Gyroscope Issues with Device Orientation http://stackoverflow.com/questions/14310347/gyroscope-issues-with-device-orientation gyro data private float gyroMatrix new float 9 orientation angles from gyro matrix private float gyroOrientation new float 3 magnetic.. vector private float accel new float 3 orientation angles from accel and magnet private float accMagOrientation new float.. float accMagOrientation new float 3 final orientation angles from sensor fusion private float fusedOrientation new float..
Android Compass that can Compensate for Tilt and Pitch http://stackoverflow.com/questions/16317599/android-compass-that-can-compensate-for-tilt-and-pitch and m_NormGravityVector calculate all the required angles from the rotation matrix NB see http math.stackexchange.com..
How to use onSensorChanged sensor data in combination with OpenGL http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl a TestSuite to find out how to calculate the rotation angles from the data you get in SensorEventListener.onSensorChanged.. was to implement several methods to send the orientation angles to the opengl view or any other target which would need it... is buffered 5 uses the orientation sensor and sets the angles how to rotate the camera with glrotate 6 uses the rotation matrix..
http://stackoverflow.com/questions/4125821/face-detection-in-android in the Android SDK. It returns face positions and angles in BMPs. But it's not very fast. Here's a realtime face detection.. detection sample using FaceDetector and OpenGL draws rectangles which works in Android 2.2. OpenCV in Android You'd better try..
Different values between sensors TYPE_ACCELEROMETER/TYPE_MAGNETIC_FIELD and TYPE_ORIENTATION http://stackoverflow.com/questions/4174389/different-values-between-sensors-type-accelerometer-type-magnetic-field-and-type azimuth pitch or roll directly. We call those Euler angles BTW . Instead it uses accelerometers and magnetometers both.. is tilted up at 90° or near it then the use of Euler angles falls apart. This is a degenerate case mathematically. In this.. doing it wrong. The only time you actually want the Euler angles is to display orientation information in a user friendly form..
How can I use SensorManager.getOrientation for tilt controls like “My Paper Plane”? http://stackoverflow.com/questions/4576493/how-can-i-use-sensormanager-getorientation-for-tilt-controls-like-my-paper-plan my game which means recording the current values of the angles x y and z I later don't know how to interpret incoming updated.. and z I later don't know how to interpret incoming updated angles to say ok looks like you have tilted the phone and you want..
Strange behavior with android orientation sensor http://stackoverflow.com/questions/5577334/strange-behavior-with-android-orientation-sensor of it as long as you are using yaw pitch and roll Euler angles . This video explains why see at 38 25. I use rotation matrices.. why see at 38 25. I use rotation matrices instead of Euler angles in my motion sensing application. Rotation matrices http gentlenav.googlecode.com..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare compare the acceleration vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you..
How to get the rotation between accelerometer's axis and motion vector? http://stackoverflow.com/questions/10207044/how-to-get-the-rotation-between-accelerometers-axis-and-motion-vector like to know if you could enlighten me about a method to compute the accelerometer readings to turn them into rotation angles or a matrix . Such a method has to avoid integrating the acceleration even once as the error is abyssal on cheap accelerometers..
How To Create a Rotating Wheel Control? http://stackoverflow.com/questions/10222730/how-to-create-a-rotating-wheel-control the users touches and on MotionEvent.ACTION_UP got the angle where user releases.After getting difference of the two angles rotated the image of that angle.After rotating the image checked the quadrant through angle and maintained int variable..
How to apply 3d transition between two activities in android? http://stackoverflow.com/questions/11069250/how-to-apply-3d-transition-between-two-activities-in-android import android.view.animation.Transformation An animation that rotates the view on the Y axis between two specified angles. This animation also adds a translation on the Z axis depth to improve the effect. public class Rotate3dAnimation extends.. mCamera Creates a new 3D rotation on the Y axis. The rotation is defined by its start angle and its end angle. Both angles are in degrees. The rotation is performed around a center point on the 2D space definied by a pair of X and Y coordinates..
Gyroscope Issues with Device Orientation http://stackoverflow.com/questions/14310347/gyroscope-issues-with-device-orientation gyro private float gyro new float 3 rotation matrix from gyro data private float gyroMatrix new float 9 orientation angles from gyro matrix private float gyroOrientation new float 3 magnetic field vector private float magnet new float 3 accelerometer.. field vector private float magnet new float 3 accelerometer vector private float accel new float 3 orientation angles from accel and magnet private float accMagOrientation new float 3 final orientation angles from sensor fusion private float.. new float 3 orientation angles from accel and magnet private float accMagOrientation new float 3 final orientation angles from sensor fusion private float fusedOrientation new float 3 accelerometer and magnetometer based rotation matrix private..
Android Compass that can Compensate for Tilt and Pitch http://stackoverflow.com/questions/16317599/android-compass-that-can-compensate-for-tilt-and-pitch consists of the three vectors m_NormEastVector m_NormNorthVector and m_NormGravityVector calculate all the required angles from the rotation matrix NB see http math.stackexchange.com questions 381649 whats the best 3d angular co ordinate system..
How to use onSensorChanged sensor data in combination with OpenGL http://stackoverflow.com/questions/2881128/how-to-use-onsensorchanged-sensor-data-in-combination-with-opengl makes it much more stable again DroidAR framework I have written a TestSuite to find out how to calculate the rotation angles from the data you get in SensorEventListener.onSensorChanged . I really hope you can complete my solution to help people.. it after reading it. Feel free to change it the main idea was to implement several methods to send the orientation angles to the opengl view or any other target which would need it. method 1 to 4 are working they are directly sending the rotationMatrix.. is buffered 4 buffered version of 1 where only acceleration is buffered 5 uses the orientation sensor and sets the angles how to rotate the camera with glrotate 6 uses the rotation matrix to calculate the angles 7 to 12 every possibility how..
http://stackoverflow.com/questions/4125821/face-detection-in-android face recognition share improve this question Try FaceDetector in the Android SDK. It returns face positions and angles in BMPs. But it's not very fast. Here's a realtime face detection sample using FaceDetector and OpenGL draws rectangles.. in BMPs. But it's not very fast. Here's a realtime face detection sample using FaceDetector and OpenGL draws rectangles which works in Android 2.2. OpenCV in Android You'd better try this on Linux I've tried it on Windows but failed . JavaCV..
Different values between sensors TYPE_ACCELEROMETER/TYPE_MAGNETIC_FIELD and TYPE_ORIENTATION http://stackoverflow.com/questions/4174389/different-values-between-sensors-type-accelerometer-type-magnetic-field-and-type doesn't contain compass or inclinometers so it doesn't measure azimuth pitch or roll directly. We call those Euler angles BTW . Instead it uses accelerometers and magnetometers both of which produce 3 space XYZ vectors. These are used to compute.. the function lets you manipulate the matrix first. If the device is tilted up at 90° or near it then the use of Euler angles falls apart. This is a degenerate case mathematically. In this realm how is the device supposed to know if you're changing.. sensor or from getOrientation you're probably doing it wrong. The only time you actually want the Euler angles is to display orientation information in a user friendly form to annotate a photograph to drive flight instrument display..
How can I use SensorManager.getOrientation for tilt controls like “My Paper Plane”? http://stackoverflow.com/questions/4576493/how-can-i-use-sensormanager-getorientation-for-tilt-controls-like-my-paper-plan all the values change a lot. The problem is when I calibrate my game which means recording the current values of the angles x y and z I later don't know how to interpret incoming updated angles to say ok looks like you have tilted the phone and.. which means recording the current values of the angles x y and z I later don't know how to interpret incoming updated angles to say ok looks like you have tilted the phone and you want to roll 3 degrees left . It's more like ok you've moved the..
Strange behavior with android orientation sensor http://stackoverflow.com/questions/5577334/strange-behavior-with-android-orientation-sensor a common problem with yaw pitch and roll. You cannot get rid of it as long as you are using yaw pitch and roll Euler angles . This video explains why see at 38 25. I use rotation matrices instead of Euler angles in my motion sensing application... using yaw pitch and roll Euler angles . This video explains why see at 38 25. I use rotation matrices instead of Euler angles in my motion sensing application. Rotation matrices http gentlenav.googlecode.com files DCMDraft2.pdf Rotation matrices..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare relative to North matter I guess not. It is far easier to compare the acceleration vectors than orientations Euler angles rotation matrices quaternions as tc pointed that out. If you are using acceleration data you have 3 dimensional vectors..
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