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Changed some variable names in positioner.c to match the names used in the page with the explanation on vdr-portal.de

This commit is contained in:
Klaus Schmidinger 2013-10-10 14:21:44 +02:00
parent bf52b1a2e3
commit 7c72f79329
2 changed files with 8 additions and 6 deletions
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2
HISTORY
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@ -7986,3 +7986,5 @@ Video Disk Recorder Revision History
Ahrenberg). Ahrenberg).
+ Note that in several places in the source code a "copy" operation is mentioned, + Note that in several places in the source code a "copy" operation is mentioned,
however there is no user interface for this, yet. however there is no user interface for this, yet.
- Changed some variable names in positioner.c to match the names used in the page with
the explanation on vdr-portal.de.

12
positioner.c
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@ -7,7 +7,7 @@
* For an explanation (in German) of the theory behind the calculations see * For an explanation (in German) of the theory behind the calculations see
* http://www.vdr-portal.de/board17-developer/board97-vdr-core/p1154305-grundlagen-und-winkelberechnungen-f%C3%BCr-h-h-diseqc-motor-antennenanlagen * http://www.vdr-portal.de/board17-developer/board97-vdr-core/p1154305-grundlagen-und-winkelberechnungen-f%C3%BCr-h-h-diseqc-motor-antennenanlagen
* *
* $Id: positioner.c 3.1 2013/08/21 11:02:52 kls Exp $ * $Id: positioner.c 3.2 2013/10/10 14:14:10 kls Exp $
*/ */
#include "positioner.h" #include "positioner.h"
@ -49,20 +49,20 @@ int cPositioner::NormalizeAngle(int Angle)
int cPositioner::CalcHourAngle(int Longitude) int cPositioner::CalcHourAngle(int Longitude)
{ {
double Delta = RAD(Longitude - Setup.SiteLon); double Alpha = RAD(Longitude - Setup.SiteLon);
double Lat = RAD(Setup.SiteLat); double Lat = RAD(Setup.SiteLat);
int Sign = Setup.SiteLat >= 0 ? -1 : 1; // angles to the right are positive, angles to the left are negative int Sign = Setup.SiteLat >= 0 ? -1 : 1; // angles to the right are positive, angles to the left are negative
return Sign * round(DEG(atan2(sin(Delta), cos(Delta) - cos(Lat) * SAT_EARTH_RATIO))); return Sign * round(DEG(atan2(sin(Alpha), cos(Alpha) - cos(Lat) * SAT_EARTH_RATIO)));
} }
int cPositioner::CalcLongitude(int HourAngle) int cPositioner::CalcLongitude(int HourAngle)
{ {
double Lat = RAD(Setup.SiteLat); double Lat = RAD(Setup.SiteLat);
double Lon = RAD(Setup.SiteLon); double Lon = RAD(Setup.SiteLon);
double Alpha = RAD(HourAngle); double Delta = RAD(HourAngle);
double Delta = Alpha - asin(sin(M_PI - Alpha) * cos(Lat) * SAT_EARTH_RATIO); double Alpha = Delta - asin(sin(M_PI - Delta) * cos(Lat) * SAT_EARTH_RATIO);
int Sign = Setup.SiteLat >= 0 ? 1 : -1; int Sign = Setup.SiteLat >= 0 ? 1 : -1;
return NormalizeAngle(round(DEG(Lon - Sign * Delta))); return NormalizeAngle(round(DEG(Lon - Sign * Alpha)));
} }
int cPositioner::HorizonLongitude(ePositionerDirection Direction) int cPositioner::HorizonLongitude(ePositionerDirection Direction)