Glyph drawer

glyph-liner.rb

#!/usr/bin/env ruby

# glyph-liner.rb : Glyph drawer
#  by takehikom

# ImageMagick's "convert" command is required.

class GlyphLiner
  def initialize(param)
    @side = 320
    @filename = "#{param.to_s.downcase}.png"
    @path = [[:outer, 210], [:inner, 210], [:inner, 330], [:outer, 330]] # stability
    if param == :share
      @path.unshift([:outer, 270])
    end
  end

  def start
    r1 = @side / 70.0
    w1 = @side / 60.0
    w2 = w1 * 0.33
    cl = "LightGoldenrod"

    @command = "convert -size #{@side}x#{@side} xc:gray10"

    @command += " -fill none -stroke #{cl} -strokewidth #{w1}"
    @command += " -draw \"stroke-linecap round stroke-linejoin round path \'"
    xy_a = @path.map {|sym, angle| poler2xy(sym, angle)}
    a1 = xy_a.map {|ary| ary.join(",")}
    a1.unshift("M")
    a1[3, 0] = "L"
    path_s = a1.join(" ")
    @command += path_s
    @command += "\'\""

    @command += " -fill none -stroke white -strokewidth #{w2}"
    @command += " -draw \""
    x, y = poler2xy(0, 0)
    @command += "circle #{x},#{y} #{x + r1},#{y + r1} "
    [30, 150, 210, 330].each do |angle|
      next if @path.include?([:inner, angle])
      x, y = poler2xy(:inner, angle)
      @command += "circle #{x},#{y} #{x + r1},#{y + r1} "
    end
    6.times do |i|
      angle = 30 + 60 * i
      next if @path.include?([:inner, angle])
      x, y = poler2xy(:outer, angle)
      @command += "circle #{x},#{y} #{x + r1},#{y + r1} "
    end
    @command += "\""

    unless xy_a.empty?
      @command += " -fill #{cl} -stroke #{cl} -strokewidth #{w2}"
      @command += " -draw \""
      xy_a.each do |x, y|
        @command += "circle #{x},#{y} #{x + r1},#{y + r1} "
      end
      @command += "\""
    end

    @command += " -quality 95 #{@filename}"
    puts @command
    system @command
  end

  def poler2xy(r, angle)
    case r
    when :zero, :center
      r = 0.0
    when :inner
      r = @side * 0.2
    when :outer
      r = @side * 0.4
    when :frame
      r = @side
    end

    x = @side * 0.5 + r * Math.cos(Math::PI * (angle / 180.0))
    y = @side * 0.5 - r * Math.sin(Math::PI * (angle / 180.0))
    [x, y]
  end
end

if __FILE__ == $0
  GlyphLiner.new(:share).start
  GlyphLiner.new(:stability).start
end