Class: Gridmap

Inherits:
Array
  • Object
show all
Defined in:
lib/gridmap.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(map_path, symbol_details, tile_size) ⇒ Gridmap

Returns a new instance of Gridmap.



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# File 'lib/gridmap.rb', line 3

def initialize(map_path, symbol_details, tile_size)
    @tile_size = tile_size
    @connected_tiles = []
    @orientated_tiles = []

    IO.readlines(map_path).each_with_index do |line, y|
        gridline = []
        line.chomp.split("").each_with_index do |symbol, x|
          t = Tile.new(x, y, tile_size, symbol_details[symbol])
          gridline      << t
          @connected_tiles  << t if t.details[:connected]
          @orientated_tiles   << t if t.details[:orientated]
      end
        self << gridline
    end

    #Since all lines should contain the same number of characters, the width is set by counting the number of characters in the first line.

  @grid_width  = self.first.count - 1
  @grid_height = self.count - 1

  @pixel_width = (@grid_width + 1) * tile_size
  @pixel_height = (@grid_height + 1) * tile_size
end

Instance Attribute Details

#connected_tiles ⇒ Object (readonly)

Returns the value of attribute connected_tiles.



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# File 'lib/gridmap.rb', line 2

def connected_tiles
  @connected_tiles
end

#grid_height ⇒ Object (readonly)

Returns the value of attribute grid_height.



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# File 'lib/gridmap.rb', line 2

def grid_height
  @grid_height
end

#grid_width ⇒ Object (readonly)

Returns the value of attribute grid_width.



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# File 'lib/gridmap.rb', line 2

def grid_width
  @grid_width
end

#orientated_tiles ⇒ Object (readonly)

Returns the value of attribute orientated_tiles.



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# File 'lib/gridmap.rb', line 2

def orientated_tiles
  @orientated_tiles
end

#pixel_height ⇒ Object (readonly)

Returns the value of attribute pixel_height.



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# File 'lib/gridmap.rb', line 2

def pixel_height
  @pixel_height
end

#pixel_width ⇒ Object (readonly)

Returns the value of attribute pixel_width.



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# File 'lib/gridmap.rb', line 2

def pixel_width
  @pixel_width
end

#tile_size ⇒ Object (readonly)

Returns the value of attribute tile_size.



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# File 'lib/gridmap.rb', line 2

def tile_size
  @tile_size
end

Instance Method Details

#angle_orientated_tiles ⇒ Object 



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# File 'lib/gridmap.rb', line 103

def angle_orientated_tiles
  #Sets angle for orientated tiles based on nearest connected tile in a clockwise direction.

  #CHANGE THIS METHOD AS YOU WISH.

  @orientated_tiles.each do |t1|
      @connected_tiles.each do |t2|
       if t2.y == t1.y - 1
         #dont change from default angle

       elsif t2.x == t1.x + 1
         t1.angle = 90
       elsif t2.y == t1.y + 1
         t1.angle = 180
       elsif t2.x == t1.x - 1
         t1.angle = 270
       else
         #dont change from default angle

       end
      end
  end
end

#check(x, y) ⇒ Object

The check method checks a tile with the given grid co-ordinates to see if it is connected or not. The logic here prevents a tile from being checked if it lies outside the grid.



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# File 'lib/gridmap.rb', line 30

def check(x, y)
  if y < 0 || x < 0 || y > @grid_height || x > @grid_width
    false
  elsif self[y][x].details[:connected] || self[y][x].details[:orientated]
    true
  else
    false
  end
end

#define_tiles(window, images) ⇒ Object 



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# File 'lib/gridmap.rb', line 27

def define_tiles(window, images)
  #The check method checks a tile with the given grid co-ordinates to see if it is connected or not.

  #The logic here prevents a tile from being checked if it lies outside the grid.

  def check(x, y)
    if y < 0 || x < 0 || y > @grid_height || x > @grid_width
      false
    elsif self[y][x].details[:connected] || self[y][x].details[:orientated]
      true
    else
      false
    end
  end 

  #Works out connections for connected or orientated tiles.

  (@connected_tiles + @orientated_tiles).each do |tile|
        connections    = [false, false, false, false] # up right down left

        connections[0] = check(tile.x, tile.y - 1) #up

    connections[1] = check(tile.x + 1, tile.y) #right

    connections[2] = check(tile.x, tile.y + 1) #down

    connections[3] = check(tile.x - 1, tile.y) #left

    tile.connections = connections
  end

  #Sets image and angle for connected tiles based on their connections.

  @connected_tiles.each do |tile|
    case tile.connections.count(true)
    when 0
      img_key = :block
    when 1
      img_key = :straight
      tile.angle = 90 if tile.connections[1] || tile.connections[3]
    when 2
      if tile.connections == [true, false, true, false]
        img_key = :straight
      elsif tile.connections == [false, true, false, true]
        img_key = :straight
        tile.angle = 90
      else
        img_key = :corner
        case tile.connections
        when [false, true, true, false]
          #angle does not need to change

        when [false, false, true, true]
          tile.angle = 90
        when [true, false, false, true]
          tile.angle = 180
        when [true, true, false, false]
          tile.angle = 270
        end
      end
    when 3
      img_key = :tri
      for n in 0..3
        tile.angle = 90 * n if tile.connections[n] == false
      end
    when 4
      img_key = :quad
    end

    tile.image = Gosu::Image.new(window, images[img_key], true)
  end

  angle_orientated_tiles

  #Sets image for all non-connected tiles.

  self.each do |line|
    line.each do |tile|
      unless tile.details[:connected]
        #img_key is inferred from the tile's type!

        img_key = tile.details[:type].to_sym
        tile.image = Gosu::Image.new(window, images[img_key], true)
      end
    end
  end
end

#draw_tiles ⇒ Object 



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# File 'lib/gridmap.rb', line 123

def draw_tiles
  self.each {|line| line.each {|tile| tile.draw}}
end

#find_tile(x, y) ⇒ Object 



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# File 'lib/gridmap.rb', line 127

def find_tile(x, y)
  self[(y / @tile_size).floor][(x / @tile_size).floor]
end