Class: Airsprite::SpriteSheet

Inherits:
Object
  • Object
show all
Defined in:
lib/airsprite/base.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, directory) ⇒ SpriteSheet

Returns a new instance of SpriteSheet.



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# File 'lib/airsprite/base.rb', line 38

def initialize(name, directory)
  self.name = name
  self.path = directory
  self.sprites = []

  Dir["#{self.path}*/"].each do |dir|
    self.sprites += [Sprite.new(self, dir.split('/').last, dir)]
  end

  Dir["#{self.path}*.png"].each do |file|
    self.sprites += [Sprite.new(self, File.basename(file, '.png'), file)]
  end
end

Instance Attribute Details

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/airsprite/base.rb', line 36

def height
  @height
end

#max_side ⇒ Object

Returns the value of attribute max_side.



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# File 'lib/airsprite/base.rb', line 36

def max_side
  @max_side
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/airsprite/base.rb', line 35

def name
  @name
end

#path ⇒ Object

Returns the value of attribute path.



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# File 'lib/airsprite/base.rb', line 35

def path
  @path
end

#sprites ⇒ Object

Returns the value of attribute sprites.



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# File 'lib/airsprite/base.rb', line 35

def sprites
  @sprites
end

#surface ⇒ Object

Returns the value of attribute surface.



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# File 'lib/airsprite/base.rb', line 36

def surface
  @surface
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/airsprite/base.rb', line 36

def width
  @width
end

Instance Method Details

#output ⇒ Object 



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# File 'lib/airsprite/base.rb', line 125

def output
  frames = sprites.map(&:animations).flatten.map(&:frames).flatten.sort_by(&:area)

  draw = Magick::Draw.new
  image = Magick::Image.new(@width, @height)
  draw.matte(0, 0, Magick::ResetMethod)

  frames.map do |frame|
    next if frame.x.nil? || frame.y.nil?
    #draw.composite(frame.data, frame.x, frame.y, Magick::CopyCompositeOp)
    draw.composite(frame.x, frame.y, frame.width, frame.height, frame.data, Magick::CopyCompositeOp)
    #image.store_pixels(frame.x, frame.y, frame.width, frame.height, frame.data.get_pixels(0, 0, frame.width, frame.height))
  end
  STDERR.puts "writing to #{self.path[0..-2]}.itx"
  File.open("#{self.path[0..-2]}.itx", 'w') {|f| f.write(self.to_s)}
  STDERR.puts "writing to #{self.path[0..-2]}.png"
  image.set_channel_depth(Magick::AllChannels, 8)
  draw.draw(image)
  image.write("#{self.path[0..-2]}.png")
end

#place ⇒ Object 



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# File 'lib/airsprite/base.rb', line 63

def place
  # biggest first
  frames = sprites.map(&:animations).flatten.map(&:frames).flatten.sort_by(&:area).reverse

  # figure out lowest possible power of 2
  @surface = frames.map(&:area).inject(0) {|sum, area| sum + area}
  @max_side = [frames.map(&:width), frames.map(&:height)].flatten.sort.last
  @width = 0
  @height = 0

  STDERR.puts "surface needed: #{@surface}"
  Airsprite.twos.map do |power_of_two|
    # lowest two must be >= biggest sprite size
    next unless power_of_two >= @max_side

    if (@surface / power_of_two) <= power_of_two
      if (power_of_two * Airsprite.twos[Airsprite.twos.index(power_of_two) - 1]) > @surface
        @width = power_of_two
        @height = Airsprite.twos[Airsprite.twos.index(power_of_two) - 1]
      else
        @width = power_of_two
        @height = power_of_two
      end
      STDERR.puts "surface generated: #{@width * @height}"
      break
    end
  end

  # set these sprite frames up!
  rects = [Rect.new(@width, @height, 0, 0)]

  # place frames
  frames.map do |frame|
    # find first square that can contain this sprite
    raise "No rects left to fill" if rects.empty?

    STDERR.puts "\n\n"
    STDERR.puts frame.to_short_s
    STDERR.puts rects.map(&:to_s).join("\n")
    rects.map do |rect|
      if rect.area >= frame.area && rect.width >= frame.width && rect.height >= frame.height
        frame.x = rect.x
        frame.y = rect.y

        # delete rect from list
        rects.delete(rect)
        unless rect.height == frame.height && rect.width == frame.width
          if rect.height == frame.height
            rects << Rect.new(rect.width - frame.width, rect.height, rect.x + frame.width, rect.y)
          elsif rect.width == frame.width
            rects << Rect.new(rect.width, rect.height - frame.height, rect.x, rect.y + frame.height)
          else
            rects << Rect.new(frame.width, rect.height - frame.height, rect.x, rect.y + frame.height)
            rects << Rect.new(rect.width - frame.width, rect.height, rect.x + frame.width, rect.y)
          end
        end
        break
      end
    end
  end
end

#to_s ⇒ Object 



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# File 'lib/airsprite/base.rb', line 52

def to_s
  <<-EOS
SpriteSheet
{
  name "#{name}"

#{sprites.map(&:to_s).join}
}
  EOS
end