noreply at mythtv
Sep 23, 2012, 12:49 AM
Post #8 of 8
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Re: Ticket #10845: Rotor with usals not working correct after upgrade to 0.25
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#10845: Rotor with usals not working correct after upgrade to 0.25
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Reporter: cyberneticbrain@… | Owner:
Type: Bug Report - General | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - General | Version: 0.25
Severity: medium | Resolution:
Keywords: rotor usals | Ticket locked: 0
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Comment (by cyberneticbrain@…):
Update. Installed mythtv 0.25 from source and adapted
mythtv/libs/libmythtv/diseqc.cpp before compiling.
{{{
double DiSEqCDevRotor::CalculateAzimuth(double angle) const
{
// Azimuth Calculation references:
// http://engr.nmsu.edu/~etti/3_2/3_2e.html
// http://www.angelfire.com/trek/ismail/theory.html
// Earth Station Latitude and Longitude in radians
double P = gCoreContext->GetSetting("Latitude", "").toFloat() *
TO_RADS;
double Ue = gCoreContext->GetSetting("Longitude", "").toFloat() *
TO_RADS; // Satellite Longitude in radians
double Us = angle * TO_RADS;
return TO_DEC * atan( tan(Us - Ue) / sin(P) );
}
}}}
changed to
{{{
double DiSEqCDevRotor::CalculateAzimuth(double angle) const
{
// Equation lifted from VDR rotor plugin by
// Thomas Bergwinkl <Thomas.Bergwinkl [at] t-online>
// Earth Station Latitude and Longitude in radians
double P = gCoreContext->GetSetting("Latitude", "").toFloat() *
TO_RADS;
double Ue = gCoreContext->GetSetting("Longitude", "").toFloat() *
TO_RADS;
// Satellite Longitude in radians
double Us = angle * TO_RADS;
double az = M_PI + atan( tan(Us - Ue) / sin(P) );
double x = acos( cos(Us - Ue) *cos(P) );
double el = atan( (cos(x) - 0.1513) / sin(x) );
double tmp_a = -cos(el) *sin(az);
double tmp_b = (sin(el) *cos(P)) - (cos(el) *sin(P)
*cos(az));
double azimuth = atan(tmp_a / tmp_B) *TO_DEC;
return azimuth;
}
}}}
After this my rotor with usals was working again.
--
Ticket URL: <http://code.mythtv.org/trac/ticket/10845#comment:7>
MythTV <http://code.mythtv.org/trac>
MythTV Media Center
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