Class: Doom::Wad::Colormap

Inherits:
Object
  • Object
show all
Defined in:
lib/doom/wad/colormap.rb

Constant Summary collapse

MAPS = 
34
MAP_SIZE = 
256

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(maps) ⇒ Colormap

Returns a new instance of Colormap.



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# File 'lib/doom/wad/colormap.rb', line 11

def initialize(maps)
  @maps = maps
end

Instance Attribute Details

#maps ⇒ Object (readonly)

Returns the value of attribute maps.



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# File 'lib/doom/wad/colormap.rb', line 9

def maps
  @maps
end

Class Method Details

.load(wad) ⇒ Object

Raises:



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# File 'lib/doom/wad/colormap.rb', line 25

def self.load(wad)
  data = wad.read_lump('COLORMAP')
  raise Error, 'COLORMAP lump not found' unless data

  maps = MAPS.times.map do |i|
    offset = i * MAP_SIZE
    data[offset, MAP_SIZE].bytes
  end

  new(maps)
end

Instance Method Details

#[](map_index) ⇒ Object 



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# File 'lib/doom/wad/colormap.rb', line 15

def [](map_index)
  @maps[map_index]
end

#map_color(color_index, light_level) ⇒ Object 



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# File 'lib/doom/wad/colormap.rb', line 19

def map_color(color_index, light_level)
  map_index = 31 - (light_level >> 3)
  map_index = map_index.clamp(0, 31)
  @maps[map_index][color_index]
end