Instrument Neutral Distributed Interface INDI  2.0.2
TelescopeDirectionVectorSupportFunctions.cpp
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1 
9 #include "TelescopeDirectionVectorSupportFunctions.h"
10 
11 namespace INDI
12 {
13 namespace AlignmentSubsystem
14 {
15 void TelescopeDirectionVectorSupportFunctions::SphericalCoordinateFromTelescopeDirectionVector(
16  const TelescopeDirectionVector TelescopeDirectionVector, double &AzimuthAngle,
17  AzimuthAngleDirection AzimuthAngleDirection, double &PolarAngle, PolarAngleDirection PolarAngleDirection)
18 {
19  if (ANTI_CLOCKWISE == AzimuthAngleDirection)
20  {
21  if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
22  {
23  AzimuthAngle = atan2(TelescopeDirectionVector.y, TelescopeDirectionVector.x);
24  PolarAngle = asin(TelescopeDirectionVector.z);
25  }
26  else
27  {
28  AzimuthAngle = atan2(TelescopeDirectionVector.y, TelescopeDirectionVector.x);
29  PolarAngle = acos(TelescopeDirectionVector.z);
30  }
31  }
32  else
33  {
34  if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
35  {
36  AzimuthAngle = atan2(-TelescopeDirectionVector.y, TelescopeDirectionVector.x);
37  PolarAngle = asin(TelescopeDirectionVector.z);
38  }
39  else
40  {
41  AzimuthAngle = atan2(-TelescopeDirectionVector.y, TelescopeDirectionVector.x);
42  PolarAngle = acos(TelescopeDirectionVector.z);
43  }
44  }
45 }
46 
47 const TelescopeDirectionVector
48 TelescopeDirectionVectorSupportFunctions::TelescopeDirectionVectorFromSphericalCoordinate(
49  const double AzimuthAngle, AzimuthAngleDirection AzimuthAngleDirection, const double PolarAngle,
50  PolarAngleDirection PolarAngleDirection)
51 {
52  TelescopeDirectionVector Vector {0, 0, 0};
53 
54  if (ANTI_CLOCKWISE == AzimuthAngleDirection)
55  {
56  if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
57  {
58  Vector.x = cos(PolarAngle) * cos(AzimuthAngle);
59  Vector.y = cos(PolarAngle) * sin(AzimuthAngle);
60  Vector.z = sin(PolarAngle);
61  }
62  else
63  {
64  Vector.x = sin(PolarAngle) * sin(AzimuthAngle);
65  Vector.y = sin(PolarAngle) * cos(AzimuthAngle);
66  Vector.z = cos(PolarAngle);
67  }
68  }
69  else
70  {
71  if (FROM_AZIMUTHAL_PLANE == PolarAngleDirection)
72  {
73  Vector.x = cos(PolarAngle) * cos(-AzimuthAngle);
74  Vector.y = cos(PolarAngle) * sin(-AzimuthAngle);
75  Vector.z = sin(PolarAngle);
76  }
77  else
78  {
79  Vector.x = sin(PolarAngle) * sin(-AzimuthAngle);
80  Vector.y = sin(PolarAngle) * cos(-AzimuthAngle);
81  Vector.z = cos(PolarAngle);
82  }
83  }
84 
85  return Vector;
86 }
87 
88 } // namespace AlignmentSubsystem
89 } // namespace INDI
INDI::AlignmentSubsystem::TelescopeDirectionVectorSupportFunctions::TelescopeDirectionVectorFromSphericalCoordinate
const TelescopeDirectionVector TelescopeDirectionVectorFromSphericalCoordinate(const double AzimuthAngle, AzimuthAngleDirection_t AzimuthAngleDirection, const double PolarAngle, PolarAngleDirection_t PolarAngleDirection)
Calculates a telescope direction vector from the supplied spherical coordinate information.
Definition: TelescopeDirectionVectorSupportFunctions.cpp:48
INDI::AlignmentSubsystem::TelescopeDirectionVectorSupportFunctions::SphericalCoordinateFromTelescopeDirectionVector
void SphericalCoordinateFromTelescopeDirectionVector(const TelescopeDirectionVector TelescopeDirectionVector, double &AzimuthAngle, AzimuthAngleDirection_t AzimuthAngleDirection, double &PolarAngle, PolarAngleDirection_t PolarAngleDirection)
Calculates a spherical coordinate from the supplied telescope direction vector.
Definition: TelescopeDirectionVectorSupportFunctions.cpp:15
Vector
The Vector class This implements the Directional Cosine used by Taki in his Matrix method....
Definition: scopesim_helper.h:566
INDI
Namespace to encapsulate INDI client, drivers, and mediator classes.
Definition: AlignmentSubsystemForClients.cpp:12
INDI::AlignmentSubsystem::TelescopeDirectionVector
Holds a nomalised direction vector (direction cosines)
Definition: Common.h:69
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