Method: PDF::Writer::Graphics#star

Defined in:
lib/pdf/writer/graphics.rb

#star(cx, cy, length, rays = 5) ⇒ Object

Draws a star centered on (x, y) with rays portions of length from the centre. Stars with an odd number of rays should have the top ray pointing toward the top of the document. This will not create a “star” with fewer than four points.

New Point

(cx, cy)

Subpath

New



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# File 'lib/pdf/writer/graphics.rb', line 416

def star(cx, cy, length, rays = 5)
  rays = 4 if rays < 4
  points = []
  part = Math::PI / rays.to_f

  0.step((rays * 4), 2) do |ray|
    if ((ray / 2) % 2 == 0)
      dist = length / 2.0
    else
      dist = length
    end

    x = cx + Math.cos((1.5 + ray / 2.0) * part) * dist
    y = cy + Math.sin((1.5 + ray / 2.0) * part) * dist
    points << [ x, y ]
  end

  polygon(points)
  move_to(cx, cy)
  self
end