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/*!
* \file TelescopeDirectionVectorSupportFunctions.cpp
*
* \author Roger James
* \date 13th November 2013
*
*/
#include "TelescopeDirectionVectorSupportFunctions.h"
namespace INDI
{
namespace AlignmentSubsystem
{
void TelescopeDirectionVectorSupportFunctions::SphericalCoordinateFromTelescopeDirectionVector(
const TelescopeDirectionVector TelescopeDirectionVector, double &AzimuthAngle,
AzimuthAngleDirection AzimuthAngleDirection, double &PolarAngle, PolarAngleDirection PolarAngleDirection)
{
if (ANTI_CLOCKWISE == AzimuthAngleDirection)
{
if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
{
AzimuthAngle = atan2(TelescopeDirectionVector.y, TelescopeDirectionVector.x);
PolarAngle = asin(TelescopeDirectionVector.z);
}
else
{
AzimuthAngle = atan2(TelescopeDirectionVector.y, TelescopeDirectionVector.x);
PolarAngle = acos(TelescopeDirectionVector.z);
}
}
else
{
if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
{
AzimuthAngle = atan2(-TelescopeDirectionVector.y, TelescopeDirectionVector.x);
PolarAngle = asin(TelescopeDirectionVector.z);
}
else
{
AzimuthAngle = atan2(-TelescopeDirectionVector.y, TelescopeDirectionVector.x);
PolarAngle = acos(TelescopeDirectionVector.z);
}
}
}
const TelescopeDirectionVector
TelescopeDirectionVectorSupportFunctions::TelescopeDirectionVectorFromSphericalCoordinate(
const double AzimuthAngle, AzimuthAngleDirection AzimuthAngleDirection, const double PolarAngle,
PolarAngleDirection PolarAngleDirection)
{
TelescopeDirectionVector Vector {0, 0, 0};
if (ANTI_CLOCKWISE == AzimuthAngleDirection)
{
if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
{
Vector.x = cos(PolarAngle) * cos(AzimuthAngle);
Vector.y = cos(PolarAngle) * sin(AzimuthAngle);
Vector.z = sin(PolarAngle);
}
else
{
Vector.x = sin(PolarAngle) * sin(AzimuthAngle);
Vector.y = sin(PolarAngle) * cos(AzimuthAngle);
Vector.z = cos(PolarAngle);
}
}
else
{
if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
{
Vector.x = cos(PolarAngle) * cos(-AzimuthAngle);
Vector.y = cos(PolarAngle) * sin(-AzimuthAngle);
Vector.z = sin(PolarAngle);
}
else
{
Vector.x = sin(PolarAngle) * sin(-AzimuthAngle);
Vector.y = sin(PolarAngle) * cos(-AzimuthAngle);
Vector.z = cos(PolarAngle);
}
}
return Vector;
}
} // namespace AlignmentSubsystem
} // namespace INDI
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