Function ballistics_calculate_zero_angle 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn ballistics_calculate_zero_angle(
    inputs: *const FFIBallisticInputs,
    wind: *const FFIWindConditions,
    atmosphere: *const FFIAtmosphericConditions,
    zero_distance: c_double,
) -> c_double

Calculate the zero angle for a target distance through the C ABI.

Safety

inputs may be null, in which case this function returns NaN. When non-null, it must point to a valid, properly aligned FFIBallisticInputs that remains readable and is not mutated for the duration of this call. wind and atmosphere may also be null; each non-null pointer has the same requirements for its corresponding type.