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POGet orientation device in the iPhone for Opengl Es
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copied!<p>I'm trying to convert the geomagnetic and accelerometer to rotate the camera in opengl ES1, I found some code from android and changed this code for iPhone, actually it is working more or less, but there are some mistakes, I´m not able to find this mistake, I put the code, also the call to Opengl Es1: <code>glLoadMatrixf((GLfloat*)matrix);</code></p> <pre><code>- (void) GetAccelerometerMatrix:(GLfloat *) matrix headingX: (float)hx headingY:(float)hy headingZ:(float)hz; { _geomagnetic[0] = hx * (FILTERINGFACTOR-0.05) + _geomagnetic[0] * (1.0 - FILTERINGFACTOR-0.5)+ _geomagnetic[3] * (0.55); _geomagnetic[1] = hy * (FILTERINGFACTOR-0.05) + _geomagnetic[1] * (1.0 - FILTERINGFACTOR-0.5)+ _geomagnetic[4] * (0.55); _geomagnetic[2] = hz * (FILTERINGFACTOR-0.05) + _geomagnetic[2] * (1.0 - FILTERINGFACTOR-0.5)+ _geomagnetic[5] * (0.55); _geomagnetic[3]=_geomagnetic[0] ; _geomagnetic[4]=_geomagnetic[1]; _geomagnetic[5]=_geomagnetic[2]; //Clear matrix to be used to rotate from the current referential to one based on the gravity vector bzero(matrix, sizeof(matrix)); //MAGNETIC float Ex = -_geomagnetic[1]; float Ey =_geomagnetic[0]; float Ez =_geomagnetic[2]; //ACCELEROMETER float Ax= -_accelerometer[0]; float Ay= _accelerometer[1] ; float Az= _accelerometer[2] ; float Hx = Ey*Az - Ez*Ay; float Hy= Ez*Ax - Ex*Az; float Hz = Ex*Ay - Ey*Ax; float normH = (float)sqrt(Hx*Hx + Hy*Hy + Hz*Hz); float invH = 1.0f / normH; Hx *= invH; Hy *= invH; Hz *= invH; float invA = 1.0f / (float)sqrt(Ax*Ax + Ay*Ay + Az*Az); Ax *= invA; Ay *= invA; Az *= invA; float Mx = Ay*Hz - Az*Hy; float My = Az*Hx - Ax*Hz; float Mz = Ax*Hy - Ay*Hx; // if (mOut.f != null) { matrix[0] = Hx; matrix[1] = Hy; matrix[2] = Hz; matrix[3] = 0; matrix[4] = Mx; matrix[5] = My; matrix[6] = Mz; matrix[7] = 0; matrix[8] = Ax; matrix[9] = Ay; matrix[10] = Az; matrix[11] = 0; matrix[12] = 0; matrix[13] = 0; matrix[14] = 0; matrix[15] = 1; } </code></pre> <p>Thank you very much for the help.</p> <p>Edit: The iPhone it is permantly in landscape orientation and I know that something is wrong because the object painted in Opengl Es appears two times.</p>

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