Prototyping The Game - Developing Games With Ruby - page 57

50 sound . play( true )
51 else
52 sound . pause
53 end
54
55 if $window . button_down?( Gosu :: MsLeft )
56 shoot( * camera . mouse_coords)
57 end
58 end
59
60 def moving?
61 any_button_down?( Gosu :: KbA , Gosu :: KbD , Gosu :: KbW , Gosu :: KbS )
62 end
63
64 def draw
65 @shadow . draw_rot( @x - 1 , @y - 1 , 0 , @body_angle )
66 @body . draw_rot( @x , @y , 1 , @body_angle )
67 @gun . draw_rot( @x , @y , 2 , @gun_angle )
68 end
69
70 def speed
71 @speed ||= 1.0
72 if moving?
73 @speed += 0.03 if @speed < 5
74 else
75 @speed = 1.0
76 end
77 @speed
78 end
79
80 private

81
82 def any_button_down? ( * buttons)
83 buttons . each do | b |
84 return true if $window . button_down?(b)
85 end
86 false
87 end
88
89 def change_angle (previous_angle, up, down, right, left)
90 if $window . button_down?(up)
91 angle = 0.0
92 angle += 45.0 if $window . button_down?(left)
93 angle -= 45.0 if $window . button_down?(right)
94 elsif $window . button_down?(down)
95 angle = 180.0