Module: Worldgen::Render

Defined in:
lib/worldgen/render.rb

Class Method Summary collapse

Class Method Details

.heightmap(map, filename) ⇒ Object

Render a heightmap to a grayscale file. Arguments:

  • map - The heightmap to render

  • filename - The filename to use. Image format will be inferred from the filename



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# File 'lib/worldgen/render.rb', line 8

def self.heightmap map, filename
  # loading each one in is crazy slow, just throw it into a pixel map
  image = Magick::Image.new(map.size, map.size) { self.background_color = "black" }

  map.each_height do |x, y, pix_height|
    grey = ("%2X" % (pix_height * 255).round) * 3
    image.pixel_color x, y, "##{grey}"
  end

  #image.display
  image.write filename
end