Module: Chingu::GFXHelpers

Included in:
GameState, Window
Defined in:
lib/chingu/gfx_helpers.rb

Overview

Various helper-methods to manipulate the screen. All drawings depend on the global variable $window which should be an instance of Gosu::Window or Chingu::Window

Instance Method Summary collapse

Instance Method Details

#fill(color) ⇒ Object

Fills whole window with color ‘color’.



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# File 'lib/chingu/gfx_helpers.rb', line 33

def fill(color)
  $window.draw_quad(0, 0, color,
                    $window.width, 0, color,
                    $window.width, $window.height, color,
                    0, $window.height, color,
                    0, :default)
end

#fill_gradient(options) ⇒ Object

Fills window or a given rect with a gradient between two colors.

:from         - Start with this color
:to           - End with this color
:rect         - Only fill rectangle :rect with the gradient, either a Rect-instance or [x,y,width,height] Array.
:orientation  - Either :vertical (top to bottom) or :horizontal (left to right)



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# File 'lib/chingu/gfx_helpers.rb', line 61

def fill_gradient(options)
  default_options = { :from => Gosu::Color.new(255,0,0,0),
                      :to => Gosu::Color.new(255,255,255,255), 
                      :thickness => 10, 
                      :orientation => :vertical,
                      :rect => Rect.new([0, 0, $window.width, $window.height]),
                      :zorder => 0,
                      :mode => :default
                    }
			options = default_options.merge(options)
  rect = Rect.new(options[:rect])      
  if options[:orientation] == :vertical
    $window.draw_quad(  rect.x, rect.y, options[:from],
                        rect.right, rect.y, options[:from],
                        rect.right, rect.bottom, options[:to],
                        rect.x, rect.bottom, options[:to],
                        options[:zorder], options[:mode]
                      )
  else
    $window.draw_quad(  rect.x, rect.y, options[:from],
                        rect.x, rect.bottom, options[:from],
                        rect.right, rect.bottom, options[:to],
                        rect.right, rect.y, options[:to],
                        options[:zorder], options[:mode]
                      )        
  end
end

#fill_rect(rect, color) ⇒ Object

Fills a given Rect ‘rect’ with Color ‘color’



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# File 'lib/chingu/gfx_helpers.rb', line 44

def fill_rect(rect, color)
  rect = Rect.new(rect)     # Make sure it's a rect
  $window.draw_quad(  rect.x, rect.y, color,
                      rect.right, rect.y, color,
                      rect.right, rect.bottom, color,
                      rect.x, rect.bottom, color,
                      0, :default)
end