World of Warcraft map tiler.

wow_map_tiler.rb

# WoW Map Tiler
require 'chunky_png'

# find tiles

print "Finding tiles..."

tile_image_names = Dir.glob("input/**/map*.png").sort


tile_datum = Array.new

tile_image_names.each do |image_name|
  tile_data = {}

  coord_reg = /(\d{1,})_(\d{1,})/;
  x_coord   = coord_reg.match(image_name)[1].to_i
  y_coord   = coord_reg.match(image_name)[2].to_i

  tile_data['file_name']   = image_name
  tile_data['x_map_coord'] = x_coord
  tile_data['y_map_coord'] = y_coord

  tile_datum.push tile_data
end

print "done!\n"

# Find coordinate dimension extents

coords = {}
coords['x_min'] = tile_datum.map{|data| data['x_map_coord'] }.min
coords['x_max'] = tile_datum.map{|data| data['x_map_coord'] }.max

coords['y_min'] = tile_datum.map{|data| data['y_map_coord'] }.min
coords['y_max'] = tile_datum.map{|data| data['y_map_coord'] }.max

puts "COORDS [#{coords['x_min']},#{coords['y_min']}]-[#{coords['x_max']},#{coords['y_max']}]"


# create matrix of image locations

print "Finding tile image offsets..."

# sample first image
first_tile  = ChunkyPNG::Image.from_file tile_datum.first['file_name']
tile_width  = first_tile.width
tile_height = first_tile.height

tile_datum.each do |tile_data|
  # offset from min

  x_tile_offset = tile_data['x_map_coord'] - coords['x_min']
  y_tile_offset = tile_data['y_map_coord'] - coords['y_min']

  tile_data['x_pixel_coord'] = x_tile_offset * tile_width
  tile_data['y_pixel_coord'] = y_tile_offset * tile_height
end

print "done!\n"


coords['x_pmin'] = tile_datum.map{|data| data['x_pixel_coord'] }.min
coords['x_pmax'] = tile_datum.map{|data| data['x_pixel_coord'] }.max

coords['y_pmin'] = tile_datum.map{|data| data['y_pixel_coord'] }.min
coords['y_pmax'] = tile_datum.map{|data| data['y_pixel_coord'] }.max

puts "COORDS [#{coords['x_pmin']},#{coords['y_pmin']}]-[#{coords['x_pmax']},#{coords['y_pmax']}]"

# paste in tiles to master map (loaded one at a time)

print "Creating blank map image..."

map_width  = coords['x_pmax'] + tile_width
map_height = coords['y_pmax'] + tile_height

map_image = ChunkyPNG::Image.new map_width, map_height, ChunkyPNG::Color::TRANSPARENT

print "done!\n"

print "Pasting tiles\n"

tile_datum.each_with_index do |tile_data, index|
    puts "Inserting tile #{index+1}/#{tile_datum.size}"
    image_x = tile_data['x_pixel_coord']
    image_y = tile_data['y_pixel_coord']

    image = ChunkyPNG::Image.from_file tile_data['file_name']
    map_image.compose! image, image_x, image_y
end

print "done!\n"

print "Saving image..."

map_image.save("mastermap.png");

print "done!\n"