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Added proper compensation for device rotations.

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this change will allow devices with diffrent default orentations to use
the compass more accuractly.
tested on a nexus s (portrait) and asus transformer (landscsape) 

Change-Id: I2ca9a9f2f122ca3bceb20f91087d8aaaae394519
Signed-off-by: Ricky Barrette <rickbarrette@gmail.com>
This commit is contained in:
Ricky Barrette
2012-03-14 11:05:10 -04:00
parent 4c4986ea61
commit f2940419bb
1 changed files with 52 additions and 34 deletions
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86
LocationLib/src/com/TwentyCodes/android/location/CompassSensor.java
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@@ -7,7 +7,6 @@
package com.TwentyCodes.android.location;
import android.content.Context;
import android.content.res.Configuration;
import android.hardware.GeomagneticField;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
@@ -17,6 +16,9 @@ import android.location.Location;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Display;
import android.view.Surface;
import android.view.WindowManager;
import com.TwentyCodes.android.debug.Debug;
@@ -26,26 +28,28 @@ import com.TwentyCodes.android.debug.Debug;
*/
public class CompassSensor{
public static final String TAG = "CompassSensor";
private static final int BEARING = 0;
private final Display mDisplay;
private final Handler mHandler;
private final SensorManager mSensorManager;
private CompassListener mListener;
private final Handler mHandler;
private Context mContext;
private float mDelination = 0;
public static final String TAG = "CompassSensor";
private final SensorEventListener mCallBack = new SensorEventListener() {
private float[] mR = new float[16];
private float[] mRotationMatrix = new float[16];
// private float[] mRemapedRotationMatrix = new float[16];
private float[] mI = new float[16];
private float[] mGravity = new float[3];
private float[] mGeomag = new float[3];
private float[] mOrientVals = new float[3];
private double mAzimuth = 0;
double mPitch = 0;
double mRoll = 0;
private float mInclination;
// double mPitch = 0;
// double mRoll = 0;
// private float mInclination;
public void onSensorChanged(final SensorEvent sensorEvent) {
if(Debug.DEBUG){
@@ -84,22 +88,36 @@ public class CompassSensor{
if (mGravity != null && mGeomag != null) {
// checks that the rotation matrix is found
boolean success = SensorManager.getRotationMatrix(mR, mI, mGravity, mGeomag);
boolean success = SensorManager.getRotationMatrix(mRotationMatrix, mI, mGravity, mGeomag);
if (success) {
/*
* TODO remap cords due to Display.getRotation()
*/
// Display display = ((WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
// switch (display.getOrientation()){
// }
// switch (mDisplay.getOrientation()){
// case Surface.ROTATION_0:
// Log.v(TAG , "0");
// // SensorManager.remapCoordinateSystem(mRotationMatrix, SensorManager.AXIS_X, SensorManager.AXIS_Y, mRemapedRotationMatrix);
// break;
// case Surface.ROTATION_90:
// Log.v(TAG , "90");
// // SensorManager.remapCoordinateSystem(mRotationMatrix, SensorManager.AXIS_X, SensorManager.AXIS_Y, mRemapedRotationMatrix);
// break;
// case Surface.ROTATION_180:
// Log.v(TAG , "180");
// // SensorManager.remapCoordinateSystem(mRotationMatrix, SensorManager.AXIS_MINUS_X, SensorManager.AXIS_MINUS_Y, mRemapedRotationMatrix);
// break;
// case Surface.ROTATION_270:
// Log.v(TAG , "270");
// // SensorManager.remapCoordinateSystem(mRotationMatrix, SensorManager.AXIS_MINUS_X, SensorManager.AXIS_Y, mRemapedRotationMatrix);
// break;
// }
// SensorManager.remapCoordinateSystem(mR, SensorManager.AXIS_MINUS_Y, SensorManager.AXIS_X, mR);
SensorManager.getOrientation(mR, mOrientVals);
mInclination = SensorManager.getInclination(mI);
/*
* remap cords due to Display.getRotation()
*/
SensorManager.getOrientation(mRotationMatrix, mOrientVals);
// mInclination = SensorManager.getInclination(mI);
mAzimuth = Math.toDegrees(mOrientVals[0]);
mPitch = Math.toDegrees(mOrientVals[1]);
mRoll = Math.toDegrees(mOrientVals[2]);
// mPitch = Math.toDegrees(mOrientVals[1]);
// mRoll = Math.toDegrees(mOrientVals[2]);
/*
* compensate for magentic delination
@@ -107,22 +125,21 @@ public class CompassSensor{
mAzimuth += mDelination;
/*
* this will compenstate for device rotations
* TODO compensate for inversed portrait
* compensate for device orentation
*/
if (mContext.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
boolean isNormal = false;
if (mRoll <= -25)
isNormal = false;
if (mRoll >= 25)
isNormal = true;
if (isNormal)
mAzimuth = mAzimuth - 90;
else
mAzimuth = mAzimuth + 90;
}
switch (mDisplay.getOrientation()){
case Surface.ROTATION_0:
break;
case Surface.ROTATION_90:
mAzimuth = mAzimuth + 90;
break;
case Surface.ROTATION_180:
mAzimuth = mAzimuth +180;
break;
case Surface.ROTATION_270:
mAzimuth = mAzimuth - 90;
break;
}
}
}
@@ -140,6 +157,7 @@ public class CompassSensor{
*/
public CompassSensor(final Context context) {
mContext = context;
mDisplay = ((WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
mHandler = new Handler(){
@Override
public void handleMessage(Message msg){