Class: DXOpal::Sprite

Inherits:
Object
  • Object
show all
Extended by:
CollisionCheck::ClassMethods
Includes:
CollisionCheck, Physics
Defined in:
opal/dxopal/sprite.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(x = 0, y = 0, image = nil) ⇒ Sprite

Returns a new instance of Sprite



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# File 'opal/dxopal/sprite.rb', line 34

def initialize(x=0, y=0, image=nil)
  @x, @y, @image = x, y, image
  @z = 0
  @angle = 0
  @scale_x = @scale_y = 1.0
  if image
    @center_x = image.width / 2
    @center_y = image.height / 2
  end

  @visible = true
  @vanished = false
  _init_collision_info(@image)
end

Instance Attribute Details

#angle ⇒ Object

Set angle (0~360, default: 0)



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# File 'opal/dxopal/sprite.rb', line 51

def angle
  @angle
end

#center_x ⇒ Object

Set rotation center (default: center of `image`)



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# File 'opal/dxopal/sprite.rb', line 55

def center_x
  @center_x
end

#center_y ⇒ Object

Set rotation center (default: center of `image`)



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# File 'opal/dxopal/sprite.rb', line 55

def center_y
  @center_y
end

#scale_x ⇒ Object

Set horizontal/vertical scale (default: 1.0)



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# File 'opal/dxopal/sprite.rb', line 53

def scale_x
  @scale_x
end

#scale_y ⇒ Object

Set horizontal/vertical scale (default: 1.0)



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# File 'opal/dxopal/sprite.rb', line 53

def scale_y
  @scale_y
end

#visible ⇒ Object

Returns the value of attribute visible



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# File 'opal/dxopal/sprite.rb', line 48

def visible
  @visible
end

#x ⇒ Object

Returns the value of attribute x



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# File 'opal/dxopal/sprite.rb', line 57

def x
  @x
end

#y ⇒ Object

Returns the value of attribute y



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# File 'opal/dxopal/sprite.rb', line 57

def y
  @y
end

#z ⇒ Object

Returns the value of attribute z



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# File 'opal/dxopal/sprite.rb', line 48

def z
  @z
end

Class Method Details

.clean(sprites) ⇒ Object

Remove vanished sprites (and nils) from the array, destructively



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# File 'opal/dxopal/sprite.rb', line 20

def self.clean(sprites)
  sprites.reject!{|sprite|
    sprite.nil? || sprite.vanished?
  }
end

.draw(sprites) ⇒ Object

Draw each of the given sprites (unless it is vanished)



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# File 'opal/dxopal/sprite.rb', line 27

def self.draw(sprites)
  sprites.flatten.sort_by(&:z).each do |sprite|
    next if sprite.respond_to?(:vanished?) && sprite.vanished?
    sprite.draw
  end
end

.update(sprites) ⇒ Object

Call #update on each sprite (unless it is vanished or do not have #update)



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# File 'opal/dxopal/sprite.rb', line 11

def self.update(sprites)
  sprites.each do |sprite|
    next if !sprite.respond_to?(:update)
    next if sprite.respond_to?(:vanished?) && sprite.vanished?
    sprite.update
  end
end

Instance Method Details

#draw ⇒ Object

Draw this sprite to Window



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# File 'opal/dxopal/sprite.rb', line 85

def draw
  raise "image not set to Sprite" if @image.nil?
  return if !@visible

  Window.draw_ex(@x, @y, @image,
                 scale_x: @scale_x, scale_y: @scale_y,
                 angle: @angle, center_x: @center_x, center_y: @center_y)
end

#image ⇒ Object 



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# File 'opal/dxopal/sprite.rb', line 69

def image; @image; end

#image=(img) ⇒ Object 



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# File 'opal/dxopal/sprite.rb', line 70

def image=(img)
  @image = img
  if @collision.nil?
    self.collision = [0, 0, img.width-1, img.height-1]
  end
  if @center_x.nil?
    @center_x = img.width / 2
    @center_y = img.height / 2
  end
end

#vanish ⇒ Object 



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# File 'opal/dxopal/sprite.rb', line 81

def vanish; @vanished = true; end

#vanished? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'opal/dxopal/sprite.rb', line 82

def vanished?; @vanished; end