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def tick args
defaults args
render args
calc args
input args
end
def defaults args
args.state.ball.debounce ||= 3 * 60
args.state.ball.size ||= 10
args.state.ball.size_half ||= args.state.ball.size / 2
args.state.ball.x ||= 640
args.state.ball.y ||= 360
args.state.ball.dx ||= 5.randomize(:sign)
args.state.ball.dy ||= 5.randomize(:sign)
args.state.left_paddle.y ||= 360
args.state.right_paddle.y ||= 360
args.state.paddle.h ||= 120
args.state.paddle.w ||= 10
args.state.left_paddle.score ||= 0
args.state.right_paddle.score ||= 0
end
def render args
render_center_line args
render_scores args
render_countdown args
render_ball args
render_paddles args
render_instructions args
end
begin :render_methods
def render_center_line args
args.outputs.lines << [640, 0, 640, 720]
end
def render_scores args
args.outputs.labels << [
[320, 650, args.state.left_paddle.score, 10, 1],
[960, 650, args.state.right_paddle.score, 10, 1]
]
end
def render_countdown args
return unless args.state.ball.debounce > 0
args.outputs.labels << [640, 360, "%.2f" % args.state.ball.debounce.fdiv(60), 10, 1]
end
def render_ball args
args.outputs.solids << solid_ball(args)
end
def render_paddles args
args.outputs.solids << solid_left_paddle(args)
args.outputs.solids << solid_right_paddle(args)
end
def render_instructions args
args.outputs.labels << [320, 30, "W and S keys to move left paddle.", 0, 1]
args.outputs.labels << [920, 30, "O and L keys to move right paddle.", 0, 1]
end
end
def calc args
args.state.ball.debounce -= 1 and return if args.state.ball.debounce > 0
calc_move_ball args
calc_collision_with_left_paddle args
calc_collision_with_right_paddle args
calc_collision_with_walls args
end
begin :calc_methods
def calc_move_ball args
args.state.ball.x += args.state.ball.dx
args.state.ball.y += args.state.ball.dy
end
def calc_collision_with_left_paddle args
if solid_left_paddle(args).intersect_rect? solid_ball(args)
args.state.ball.dx *= -1
elsif args.state.ball.x < 0
args.state.right_paddle.score += 1
calc_reset_round args
end
end
def calc_collision_with_right_paddle args
if solid_right_paddle(args).intersect_rect? solid_ball(args)
args.state.ball.dx *= -1
elsif args.state.ball.x > 1280
args.state.left_paddle.score += 1
calc_reset_round args
end
end
def calc_collision_with_walls args
if args.state.ball.y + args.state.ball.size_half > 720
args.state.ball.y = 720 - args.state.ball.size_half
args.state.ball.dy *= -1
elsif args.state.ball.y - args.state.ball.size_half < 0
args.state.ball.y = args.state.ball.size_half
args.state.ball.dy *= -1
end
end
def calc_reset_round args
args.state.ball.x = 640
args.state.ball.y = 360
args.state.ball.dx = 5.randomize(:sign)
args.state.ball.dy = 5.randomize(:sign)
args.state.ball.debounce = 3 * 60
end
end
def input args
input_left_paddle args
input_right_paddle args
end
begin :input_methods
def input_left_paddle args
if args.inputs.controller_one.key_down.down || args.inputs.keyboard.key_down.s
args.state.left_paddle.y -= 40
elsif args.inputs.controller_one.key_down.up || args.inputs.keyboard.key_down.w
args.state.left_paddle.y += 40
end
end
def input_right_paddle args
if args.inputs.controller_two.key_down.down || args.inputs.keyboard.key_down.l
args.state.right_paddle.y -= 40
elsif args.inputs.controller_two.key_down.up || args.inputs.keyboard.key_down.o
args.state.right_paddle.y += 40
end
end
end
begin :assets
def solid_ball args
centered_rect args.state.ball.x, args.state.ball.y, args.state.ball.size, args.state.ball.size
end
def solid_left_paddle args
centered_rect_vertically 0, args.state.left_paddle.y, args.state.paddle.w, args.state.paddle.h
end
def solid_right_paddle args
centered_rect_vertically 1280 - args.state.paddle.w, args.state.right_paddle.y, args.state.paddle.w, args.state.paddle.h
end
def centered_rect x, y, w, h
[x - w / 2, y - h / 2, w, h]
end
def centered_rect_vertically x, y, w, h
[x, y - h / 2, w, h]
end
end
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