class IRB::Canvas
Public Class Methods
Source
# File lib/irb/easter-egg.rb, line 32 def initialize((h, w)) @data = (0..h-2).map { [0] * w } @scale = [w / 2.0, h-2].min @center = Complex(w / 2, h-2) end
Public Instance Methods
Source
# File lib/irb/easter-egg.rb, line 55 def draw @data.each {|row| row.fill(0) } yield @data.map {|row| row.map {|n| " ',;"[n] }.join }.join("\n") end
Source
# File lib/irb/easter-egg.rb, line 38 def line((x1, y1), (x2, y2)) p1 = Complex(x1, y1) / 2 * @scale + @center p2 = Complex(x2, y2) / 2 * @scale + @center line0(p1, p2) end
Private Instance Methods
Source
# File lib/irb/easter-egg.rb, line 44 def line0(p1, p2) mid = (p1 + p2) / 2 if (p1 - p2).abs < 1 x, y = mid.rect @data[y / 2][x] |= (y % 2 > 1 ? 2 : 1) else line0(p1, mid) line0(p2, mid) end end