ConstantWind.hpp

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// Constant Wind Field Model
// Simple constant wind vector in NED frame
#pragma once
 
#include <vulcan/wind/WindTypes.hpp>
 
namespace vulcan::constant_wind {
 
// ============================================================================
// Constant Wind from NED Components
// ============================================================================

template <typename Scalar>
wind::WindVector<Scalar> from_ned(const Scalar &north, const Scalar &east,
                                  const Scalar &down = Scalar(0)) {
    return wind::WindVector<Scalar>{.north = north, .east = east, .down = down};
}
 
// ============================================================================
// Constant Wind from Speed and Direction
// ============================================================================

template <typename Scalar>
wind::WindVector<Scalar> from_speed_direction(const Scalar &speed,
                                              const Scalar &direction_from) {
    // Wind blows FROM direction_from, so velocity is in opposite direction
    // North component: -speed * cos(direction_from)
    // East component: -speed * sin(direction_from)
    return wind::WindVector<Scalar>{
        .north = -speed * janus::cos(direction_from),
        .east = -speed * janus::sin(direction_from),
        .down = speed * Scalar(0) // Zero down component, maintain scalar type
    };
}
 
} // namespace vulcan::constant_wind