models.py 文件源码

def project_tilt_to_pa(tilt, inclination):

    """
    This function ...
    :param tilt:
    :param inclination:
    :return:
    """

    # Get the tilt angle and inclination in radians
    tilt_radian = tilt.to("radian").value
    i_radian = inclination.to("radian").value

    denominator = math.sqrt(math.sin(tilt_radian)**2 * math.sin(i_radian)**2 + math.cos(tilt_radian)**2)

    cos_pa = math.sin(tilt_radian) * math.sin(i_radian) / denominator
    sin_pa = math.cos(tilt_radian) / denominator

    pa_radian = math.atan2(sin_pa, cos_pa) * Unit("radian")

    return pa_radian.to("deg")

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