Android Sensors for OpenGL

Question

I want to get the android sensors to work with opengl to rotate the opengl\'s camera to wherever the phone is pointing to.

To elaborate: if the player is looking at

Answer 1

You're supplying null for the inclination matrix - that's not correct.

SensorManager.getRotationMatrix(rotationMatrix, null, gravity, geomag);

There are lots of examples on how to use the SensorManager's getRotationMatrix(...).

float[] R = new float[16];
float[] I = new float[16];

if (SensorManager.getRotationMatrix(R, I, accelerometerValues, geomagneticValues)) {
    float[] anglesInRadians = new float[3];
    SensorManager.getOrientation(R, anglesInRadians);
    ...
}

Also "rotate the opengl's camera to wherever the phone is pointing to" is rather ambiguous. For instance, if you meant some sort of a augmented reality approach, then you should be mapping AXIS_X to AXIS_Z. Note that remapping might not even be necessary, e.g. when you already fix your activity to landscape mode. More details here.

Some example codes involving sensor data and OpenGL ES:

• CompassActivity
• How to use onSensorChanged sensor data in combination with OpenGL