【Unity】固定幅ビットマップフォントを使う

# create_bmfont.rb
require 'erb'

HEADER = <<EOD
%YAML 1.1
%TAG !u! tag:unity3d.com,2011:
--- !u!128 &12800000
Font:
  m_ObjectHideFlags: 0
  m_PrefabParentObject: {fileID: 0}
  m_PrefabInternal: {fileID: 0}
  m_Name: <%=name%>
  serializedVersion: 4
  m_AsciiStartOffset: 0
  m_Kerning: .100000001
  m_LineSpacing: .100000001
  m_CharacterSpacing: 1
  m_CharacterPadding: 0
  m_ConvertCase: 0
  m_DefaultMaterial:
  m_CharacterRects:
EOD

FOOTER = <<EOD
  m_Texture: {fileID: 0}
  m_KerningValues: []
  m_PixelScale: .100000001
  m_FontData:
  m_FontSize: 0
  m_Ascent: 0
  m_DefaultStyle: 0
  m_FontNames: []
  m_FallbackFonts: []
  m_FontRenderingMode: 0
EOD

RECT_TEMPLATE = <<EOD
  - serializedVersion: 2
    index: <%=char_code%>
    uv:
      serializedVersion: 2
      x: <%=uv_x%>
      y: <%=uv_y%>
      width: <%=uv_w%>
      height: <%=uv_h%>
    vert:
      serializedVersion: 2
      x: <%=vert_x%>
      y: <%=vert_y%>
      width: <%=vert_w%>
      height: <%=vert_h%>
    width: <%=width%>
    flipped: 0
EOD

def main(name, w, h, start)
  print ERB.new(HEADER).result(binding)

  vert_x = vert_y = 0
  vert_w = 16
  vert_h = -16
  width = 160
  uv_w = 1.0 / w
  uv_h = 1.0 / h
  rect_erb = ERB.new(RECT_TEMPLATE)
  h.times do |iy|
    uv_y = (h - 1 - iy) * uv_h
    w.times do |ix|
      uv_x = ix * uv_w
      char_code = ix + iy * w + start
      print rect_erb.result(binding)
    end
  end

  print ERB.new(FOOTER).result(binding)
end


if $0 == __FILE__
  main('BitmapFont', 16, 8, 32)
end