Function fenris::element::map_physical_coordinates

pub fn map_physical_coordinates<T, Element, GeometryDim>(
    element: &Element,
    x: &OPoint<T, GeometryDim>
) -> Result<OPoint<T, GeometryDim>, Box<dyn Error>>where
    T: Real,
    Element: FiniteElement<T, GeometryDim = GeometryDim, ReferenceDim = GeometryDim>,
    GeometryDim: DimName + DimMin<GeometryDim, Output = GeometryDim>,
    DefaultAllocator: DimAllocator<T, GeometryDim>,

Maps physical coordinates x to reference coordinates xi by solving the equation x - T(xi) = 0 using Newton’s method.