C# (CSharp) Astronomy.Rotation_HOR_EQD Examples

Example #1

File: triangulate.cs Project: rottenjonny88/astronomy

        static AstroVector DirectionVector(AstroTime time, Observer observer, double altitude, double azimuth)
        {
            // Convert horizontal angles to a horizontal unit vector.
            var         hor  = new Spherical(altitude, azimuth, 1.0);
            AstroVector hvec = Astronomy.VectorFromHorizon(hor, time, Refraction.None);

            // Find the rotation matrix that converts horizontal vectors to equatorial vectors.
            RotationMatrix rot = Astronomy.Rotation_HOR_EQD(time, observer);

            // Rotate the horizontal (HOR) vector to an equator-of-date (EQD) vector.
            AstroVector evec = Astronomy.RotateVector(rot, hvec);

            return(evec);
        }