require 'ftor'
module Rubygame

class Surface
  def draw_line_s(point1, point2, color, thickness)
    half_thickness = thickness/2.0
    x1 = point1[0]
    y1 = point1[1]
    x2 = point2[0]
    y2 = point2[1]

    point1_vector = Ftor.new x1, y1
    point2_vector = Ftor.new x2, y2

    line_vector = point2_vector-point1_vector
    perp_vector = line_vector.normal.unit

    points = []
    pvt = perp_vector*half_thickness
    poly_point1 = Ftor.new(x1,y1)+pvt
    poly_point2 = Ftor.new(x2,y2)+pvt
    poly_point3 = Ftor.new(x2,y2)-pvt
    poly_point4 = Ftor.new(x1,y1)-pvt

    points << [poly_point1.x,poly_point1.y]
    points << [poly_point2.x,poly_point2.y]
    points << [poly_point3.x,poly_point3.y]
    points << [poly_point4.x,poly_point4.y]
    points << [poly_point1.x,poly_point1.y]

    draw_polygon_s points, color
    draw_circle_s [x1,y1], half_thickness, color
    draw_circle_s [x2,y2], half_thickness, color
  end
end

end # module Rubygame