/// <summary>
/// Converts the specified <see cref="PolygonGrid"/> to a <see
/// cref="PathFigureCollection"/>.</summary>
/// <param name="grid">
/// The <see cref="PolygonGrid"/> to convert.</param>
/// <returns>
/// A frozen <see cref="PathFigureCollection"/> containing one <see cref="PathFigure"/> for
/// each polygonal <see cref="PolygonGrid.Element"/> in the specified <paramref
/// name="grid"/>.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="grid"/> is a null reference.</exception>
/// <remarks>
/// <b>ToFigures</b> returns the results of <see cref="ToFigure"/> for each <see
/// cref="PolygonGrid.Element"/> in the specified <paramref name="grid"/>, shifted by the
/// corresponding <see cref="PolygonGrid.GridToDisplay"/> result. Each polygonal <see
/// cref="PolygonGrid.Element"/> is therefore represented by one <see cref="PathFigure"/>.
/// </remarks>
public static PathFigureCollection ToFigures(this PolygonGrid grid)
{
int width = grid.Size.Width, height = grid.Size.Height;
var figures = new PathFigureCollection(width * height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
PointD offset = grid.GridToDisplay(x, y);
PathFigure figure = grid.Element.ToFigure(offset);
figures.Add(figure);
}
}
figures.Freeze();
return(figures);
}