Class: DXRuby::Tiled::StaggeredLayer

Inherits:
TileLayer show all
Defined in:
lib/dxruby_tiled/layer_staggered.rb

Instance Attribute Summary

Attributes inherited from TileLayer

#height, #startx, #starty, #width

Attributes inherited from Layer

#name, #offset_x, #offset_y, #opacity, #properties, #visible, #z_index

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from TileLayer

#[], #[]=, #at, #change_at, #include?, #tile_at

Methods inherited from Layer

create

Constructor Details

#initialize(data, map) ⇒ StaggeredLayer

Returns a new instance of StaggeredLayer.



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# File 'lib/dxruby_tiled/layer_staggered.rb', line 4

def initialize(data, map)
  super
  @stagger_axis_y    = map.stagger_axis_y
  @stagger_index_odd = map.stagger_index_odd
end

Class Method Details

.pixel_height(map) ⇒ Object 



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# File 'lib/dxruby_tiled/layer_staggered.rb', line 117

def self.pixel_height(map)
  map.stagger_axis_y ?

    map.tile_height * (map.height + 1) / 2 :
    map.tile_height * map.height + map.tile_height / 2
end

.pixel_width(map) ⇒ Object 



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# File 'lib/dxruby_tiled/layer_staggered.rb', line 111

def self.pixel_width(map)
  map.stagger_axis_y ?

    map.tile_width * map.width + map.tile_width / 2 :
    map.tile_width * (map.width + 1) / 2
end

Instance Method Details

#render(pos_x, pos_y, target = DXRuby::Window, z = @z_index, offset_x = 0, offset_y = 0, opacity = 1.0) ⇒ Object Also known as: draw 



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# File 'lib/dxruby_tiled/layer_staggered.rb', line 10

def render(pos_x, pos_y, target = DXRuby::Window, z = @z_index, offset_x = 0, offset_y = 0, opacity = 1.0)
  super
  
  pos_x, pos_y = 0, 0 if @fixed
  tile_width2  = @tile_width / 2
  tile_height2 = @tile_height / 2
  off_x = offset_x + @offset_x - pos_x
  off_y = offset_y + @offset_y - pos_y
  x1, y1 = xy_at(@tile_width  - @tilesets.tile_right  - off_x,
                 @tile_height - @tilesets.tile_bottom - off_y)
  x2, y2 = xy_at(@render_target.width  - @tilesets.tile_left - off_x - 1,
                 @render_target.height - @tilesets.tile_top  - off_y - 1)
  x_range = ((x1 - 1)..(x2 + 1))
  y_range = ((y1 - 1)..(y2 + 1))
  
  if @stagger_axis_y
    y_range.public_send(@renderorder_y ? :each : :reverse_each) do |y|
      x0 = @stagger_index_odd ^ y.even? ? tile_width2 : 0
      x_range.public_send(@renderorder_x ? :each : :reverse_each) do |x|
        @tilesets[self[x, y]].render(
          x * @tile_width   + off_x + x0,
          y *  tile_height2 + off_y,
          @render_target)
      end
    end
  else
    y_range.public_send(@renderorder_y ? :each : :reverse_each) do |y|
      x_range.public_send(@renderorder_x ? :each : :reverse_each) do |x|
        next if @stagger_index_odd ^ x.even?
        @tilesets[self[x, y]].render(
          x *  tile_width2 + off_x,
          y * @tile_height + off_y,
          @render_target)
      end
      x_range.public_send(@renderorder_x ? :each : :reverse_each) do |x|
        next unless @stagger_index_odd ^ x.even?
        @tilesets[self[x, y]].render(
          x *  tile_width2 + off_x,
          y * @tile_height + off_y + tile_height2,
          @render_target)
      end
    end
  end
  
  target.draw_alpha(0, 0, @render_target, @opacity * 255, z + @z_index)
end

#vertexs(x, y) ⇒ Object 



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# File 'lib/dxruby_tiled/layer_staggered.rb', line 89

def vertexs(x, y)
  w, h = @tile_width / 2, @tile_height / 2
  if @stagger_axis_y
    x0 = @stagger_index_odd ^ y.even? ? w : 0
    return [
      [ x0 + x * w * 2 + w    , y * h         ],
      [ x0 + x * w * 2        , y * h + h     ],
      [ x0 + x * w * 2 + w    , y * h + h * 2 ],
      [ x0 + x * w * 2 + w * 2, y * h + h     ]
    ]
  else
    y0 = @stagger_index_odd ^ x.even? ? h : 0
    return [
      [ x * w + w    , y0 + y * h * 2         ],
      [ x * w        , y0 + y * h * 2 + h     ],
      [ x * w + w    , y0 + y * h * 2 + h * 2 ],
      [ x * w + w * 2, y0 + y * h * 2 + h     ]
    ]
  end
end

#xy_at(pos_x, pos_y) ⇒ Object 



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# File 'lib/dxruby_tiled/layer_staggered.rb', line 58

def xy_at(pos_x, pos_y)
  if @stagger_axis_y
    y = (pos_y * 2 / @tile_height).floor
    pos_x -= @tile_width / 2 if @stagger_index_odd ^ y.even?
    x = (pos_x / @tile_width).floor
    dx = pos_x % @tile_width
    dy = pos_y % (@tile_height / 2)
    if (dy < @tile_height / 2 - dx * @tile_height / @tile_width)
      y -= 1
      x += @stagger_index_odd ^ y.even? ? -1 : 0
    elsif (dy < dx * @tile_height / @tile_width - @tile_height / 2)
      y -= 1
      x += @stagger_index_odd ^ y.even? ? 0 : 1
    end
  else
    x = (pos_x * 2 / @tile_width).floor
    pos_y -= @tile_height / 2 if @stagger_index_odd ^ x.even?
    y = (pos_y / @tile_height).floor
    dx = pos_x % (@tile_width / 2)
    dy = pos_y % @tile_height
    if (dy < @tile_height / 2 - dx * @tile_height / @tile_width)
      x -= 1
      y += @stagger_index_odd ^ x.even? ? -1 : 0
    elsif (dy > dx * @tile_height / @tile_width + @tile_height / 2)
      x -= 1
      y += @stagger_index_odd ^ x.even? ? 0 : 1
    end
  end
  return x, y
end