Class: Renderer

Inherits:
Object show all
Defined in:
lib/gamebox/core/renderer.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/gamebox/core/renderer.rb', line 4

def initialize
  clear_drawables
end

Instance Method Details

#clear_drawables ⇒ Object 



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# File 'lib/gamebox/core/renderer.rb', line 27

def clear_drawables
  @drawables = {}
  @layer_orders = {}
  @parallax_layers = []
end

#draw(target) ⇒ Object 



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# File 'lib/gamebox/core/renderer.rb', line 34

def draw(target)
  center_x = viewport.width / 2
  center_y = viewport.height / 2

  target.rotate(-viewport.rotation, center_x, center_y) do
    z = 0
    @parallax_layers.each do |parallax_layer|
      drawables_on_parallax_layer = @drawables[parallax_layer]

      if drawables_on_parallax_layer
        @layer_orders[parallax_layer].each do |layer|

          trans_x = viewport.x_offset parallax_layer
          trans_y = viewport.y_offset parallax_layer

          z += 1
          drawables_on_parallax_layer[layer].each do |drawable|
            drawable.draw target, trans_x, trans_y, z
          end
        end
      end
    end
  end
end

#move_layer(from_parallax, from_layer, to_parallax, to_layer) ⇒ Object

move all actors from one layer to another note, this will remove all actors in that layer!



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# File 'lib/gamebox/core/renderer.rb', line 61

def move_layer(from_parallax, from_layer, to_parallax, to_layer)
  drawable_list = @drawables[from_parallax][from_layer].dup

  drawable_list.each do |drawable|
    unregister_drawable drawable      
    drawable.parallax = to_parallax
    drawable.layer = to_layer
    register_drawable drawable      
  end
end

#register_drawable(drawable) ⇒ Object 



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# File 'lib/gamebox/core/renderer.rb', line 8

def register_drawable(drawable)
  layer = drawable.layer
  parallax = drawable.parallax
  unless @drawables[parallax]
    @drawables[parallax] = {}
    @parallax_layers = @drawables.keys.sort.reverse
  end
  unless @drawables[parallax][layer]
    @drawables[parallax][layer] = []
    @layer_orders[parallax] = @drawables[parallax].keys.sort
  end
  @drawables[parallax][layer] << drawable
end

#unregister_drawable(drawable) ⇒ Object 



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# File 'lib/gamebox/core/renderer.rb', line 23

def unregister_drawable(drawable)
  @drawables[drawable.parallax][drawable.layer].delete drawable
end