Class: Hook

Inherits:
Object
  • Object
show all
Defined in:
lib/lib/items/hook.rb

Instance Method Summary collapse

Constructor Details

#initialize(window, brickyard, crane) ⇒ Hook

Returns a new instance of Hook.



14
15
16
17
18
19
20
21
22
 
# File 'lib/lib/items/hook.rb', line 14

def initialize(window, brickyard, crane)
  dir_path = File.dirname(__FILE__)
  @image = Gosu::Image.new(dir_path + '/../../media/square.png')
  @window = window
  @brickyard = brickyard
  @crane = crane

  reset!
end

Instance Method Details

#draw ⇒ Object 



99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
 
# File 'lib/lib/items/hook.rb', line 99

def draw
  @image.draw_rot(@x, CRANE_BOOM_Y, ZITEMS, 0,
                  center_x = 0.5, center_y = 0,
                  scale_x = 0.75, scale_y = TROLLEY_THICKNESS,
                  color = Gosu::Color::BLACK) # trolley
  @image.draw_rot(@x, CRANE_BOOM_Y, ZITEMS, 0,
                  center_x = 0.5, center_y = 0, # y: top
                  scale_x = 0.08, scale_y = (@y - CRANE_BOOM_Y) / TILESIZE,
                  color = Gosu::Color::BLACK) # cable
  @image.draw_rot(@x, @y, ZITEMS, 0,
                  center_x = 0.5, center_y = 1, # y: bottom
                  scale_x = 1, scale_y = HOOK_THICKNESS,
                  color = Gosu::Color::BLACK) # hook itself

  if $debug and not holding?
    coords = Gosu::Image.from_text("[#{@x}, #{@y}, #{@angle}°]", LINE_HEIGHT)
    coords.draw_rot(@x, @y, ZTEXT, @angle)
  end
end

#drop! ⇒ Object 



71
72
73
74
 
# File 'lib/lib/items/hook.rb', line 71

def drop!
  @held.start_falling!
  @held = nil
end

#find_reachable_brick ⇒ Object

Find nearest brick under hook



88
89
90
91
92
93
94
95
96
97
 
# File 'lib/lib/items/hook.rb', line 88

def find_reachable_brick
  # TODO here
  reachables = @brickyard.bricks.select {
    |ii| ii.x.between?(@x - HOOK_MAGNET_X, @x + HOOK_MAGNET_X)
  } # brick is a bit to the left or right of hook
  reachables = reachables.select {
    |ii| ii.y.between?(@y, @y + HOOK_MAGNET_Y)
  } # brick is at the same height or bit lower than hook
  reachables[0] # if multiple in reach, pick the older
end

#hold! ⇒ Object 



76
77
78
79
80
81
82
83
84
85
 
# File 'lib/lib/items/hook.rb', line 76

def hold!
  reachable_brick = find_reachable_brick
  if reachable_brick
    @held = reachable_brick
    @held.stop_falling! # to be sure
    @held.status = BRICK_STATUS_BEING_HELD
  else
    puts "no bricks nearby"
  end
end

#holding? ⇒ Boolean

Returns:

  • (Boolean) 


67
68
69
 
# File 'lib/lib/items/hook.rb', line 67

def holding?
  !@held.nil?
end

#reset! ⇒ Object

Load default setup



25
26
27
28
29
30
 
# File 'lib/lib/items/hook.rb', line 25

def reset!
  @x = CENTRE
  @y = CENTRE
  @angle = 0
  @held = nil
end

#update(button) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/lib/items/hook.rb', line 32

def update(button)
  case button
    when Gosu::MS_LEFT then
      if holding?
        drop!
      else
        hold!
      end
    when Gosu::KB_R then
      if holding?
        @held.rotate!
  end
  end

  # TODO directional movement instead of teleporting
  @x = @window.mouse_x.to_int
  @y = @window.mouse_y.to_int

  # Block movement (by bricks)
  # TODO

  # Curtail movement (by borders of working area)
  @x = [@x, HOOK_MIN_X].max
  @x = [@x, HOOK_MAX_X].min
  @y = [@y, HOOK_MIN_Y].max
  @y = [@y, HOOK_MAX_Y].min # MAX_Y does not need to care about status of
  # holding? as when TRUE the held brick should have already blocked the move

  # Update held brick
  if @held
    @held.x = @x
    @held.y = @y
  end
end