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POAndroid Sensors for OpenGL
 

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    <p>I want to get the android sensors to work with opengl to rotate the opengl's camera to wherever the phone is pointing to.</p> <p>To elaborate: if the player is looking at east, I'd like to the opengl's camera points east too on the game; if the player points to the sky, I'd like to point the opengl's camera to the sky and so on.</p> <p>I've tried using <code>getRotationMatrix</code> and load the matrix on the opengl but it only works on the up-down direction, if I turn the cell to the sides, there is no difference. Here is what I've done so far (the app is in landscape mode):</p> <pre><code> public void onSensorChanged(SensorEvent evt) { int type=evt.sensor.getType(); float alpha = 0.8f; //Smoothing the sensor data a bit if (type == Sensor.TYPE_MAGNETIC_FIELD) { geomag[0]=geomag[0]*alpha+evt.values[0]*(1-alpha); geomag[1]=geomag[1]*alpha+evt.values[1]*(1-alpha); geomag[2]=geomag[2]*alpha+evt.values[2]*(1-alpha); } else if (type == Sensor.TYPE_ACCELEROMETER) { gravity[0]= gravity[0]*alpha+evt.values[0]*(1-alpha); gravity[1]= gravity[1]*alpha+evt.values[1]*(1-alpha); gravity[2]= gravity[2]*alpha+evt.values[2]*(1-alpha); } if ((type==Sensor.TYPE_MAGNETIC_FIELD) || (type==Sensor.TYPE_ACCELEROMETER)) { rotationMatrix = new float[16]; SensorManager.getRotationMatrix(rotationMatrix, null, gravity, geomag); SensorManager.remapCoordinateSystem( rotationMatrix, SensorManager.AXIS_Y, SensorManager.AXIS_MINUS_X, rotationMatrix ); if (AOGLRenderer.rotationmatrix==null) AOGLRenderer.rotationmatrix = new float[16]; AOGLRenderer.rotationmatrix = rotationMatrix; } } </code></pre> <p>and in the opengl code:</p> <pre><code> gl.glClear(GL10.GL_COLOR_BUFFER_BIT | // OpenGL docs. GL10.GL_DEPTH_BUFFER_BIT); gl.glLoadIdentity(); if (rotationmatrix!=null) gl.glLoadMatrixf(rotationmatrix, 0); gl.glPushMatrix(); gl.glTranslatef(0, 0, -70); g.draw(gl); gl.glPopMatrix(); alpha+=2f; gl.glTranslatef(0, -15, 0); c.draw(gl); </code></pre> <p>I'd like that someone who actually did it could share their code! I'd really appreciate it! Thank you all!</p>
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