


from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available


A      = {
    "configuration_poolformer": [
        "POOLFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP",
        "PoolFormerConfig",
        "PoolFormerOnnxConfig",
    ]
}

try:
    if not is_vision_available():
        raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
    pass
else:
    A      = ["PoolFormerFeatureExtractor"]
    A      = ["PoolFormerImageProcessor"]

try:
    if not is_torch_available():
        raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
    pass
else:
    A      = [
        "POOLFORMER_PRETRAINED_MODEL_ARCHIVE_LIST",
        "PoolFormerForImageClassification",
        "PoolFormerModel",
        "PoolFormerPreTrainedModel",
    ]


if TYPE_CHECKING:
    from .configuration_poolformer import (
        POOLFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP,
        PoolFormerConfig,
        PoolFormerOnnxConfig,
    )

    try:
        if not is_vision_available():
            raise OptionalDependencyNotAvailable()
    except OptionalDependencyNotAvailable:
        pass
    else:
        from .feature_extraction_poolformer import PoolFormerFeatureExtractor
        from .image_processing_poolformer import PoolFormerImageProcessor

    try:
        if not is_torch_available():
            raise OptionalDependencyNotAvailable()
    except OptionalDependencyNotAvailable:
        pass
    else:
        from .modeling_poolformer import (
            POOLFORMER_PRETRAINED_MODEL_ARCHIVE_LIST,
            PoolFormerForImageClassification,
            PoolFormerModel,
            PoolFormerPreTrainedModel,
        )


else:
    import sys

    A      = _LazyModule(__name__, globals()["__file__"], _import_structure)









from math import atan, cos, radians, sin, tan

from .haversine_distance import haversine_distance

A      = 6378137.0
A      = 6356752.314245
A      = 637_8137





def __UpperCAmelCase       (		__A ,						__A ,						__A ,						__A			)						->					float:



       '''simple docstring'''





       UpperCAmelCase__										=     (AXIS_A - AXIS_B) / AXIS_A
       # Parametric latitudes
       # https://en.wikipedia.org/wiki/Latitude#Parametric_(or_reduced)_latitude
       UpperCAmelCase__										=     atan((1 - flattening) * tan(radians(__A			)			)			)
       UpperCAmelCase__										=     atan((1 - flattening) * tan(radians(__A			)			)			)

       # Compute central angle between two points
       # using haversine theta. sigma =  haversine_distance / equatorial radius
       UpperCAmelCase__										=     haversine_distance(__A ,						__A ,						__A ,						__A			) / EQUATORIAL_RADIUS

       # Intermediate P and Q values
       UpperCAmelCase__										=     (b_lata + b_lata) / 2
       UpperCAmelCase__										=     (b_lata - b_lata) / 2

       # Intermediate X value
       # X = (sigma - sin(sigma)) * sin^2Pcos^2Q / cos^2(sigma/2)
       UpperCAmelCase__										=     (sin(__A			) ** 2) * (cos(__A			) ** 2)
       UpperCAmelCase__										=     cos(sigma / 2			) ** 2
       UpperCAmelCase__										=     (sigma - sin(__A			)) * (x_numerator / x_demonimator)

       # Intermediate Y value
       # Y = (sigma + sin(sigma)) * cos^2Psin^2Q / sin^2(sigma/2)
       UpperCAmelCase__										=     (cos(__A			) ** 2) * (sin(__A			) ** 2)
       UpperCAmelCase__										=     sin(sigma / 2			) ** 2
       UpperCAmelCase__										=     (sigma + sin(__A			)) * (y_numerator / y_denominator)

       return EQUATORIAL_RADIUS * (sigma - ((flattening / 2) * (x_value + y_value)))


if __name__ == "__main__":
    import doctest

    doctest.testmod()





