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#
# Pong in Shoes
# a clone of http://billmill.org/pong.html
# and shoes is at http://shoooes.net
#
# This is just for kicks -- I'm very fond of NodeBox as well.
#
# There's a slightly different approach in Shoes: rather than
# redrawing the shapes, you can move the shapes around as objects.
# Yeah, see, notice how @you, @comp and @ball are used.
#
Shoes.app :width => 400, :height => 400, :resizable => false do
paddle_size = 75
ball_diameter = 20
vx, vy = [3, 4]
compuspeed = 10
bounce = 1.2
# set up the playing board
nostroke and background white
@ball = oval 0, 0, ball_diameter, :fill => "#9B7"
@you, @comp = [app.height-4, 0].map {|y| rect 0, y, paddle_size, 4, :curve => 2}
# animates at 40 frames per second
@anim = animate 40 do
# check for game over
if @ball.top + ball_diameter < 0 or @ball.top > app.height
para strong("GAME OVER", :size => 32), "\n",
@ball.top < 0 ? "You win!" : "Computer wins", :top => 140, :align => 'center'
@ball.hide and @anim.stop
end
# move the @you paddle, following the mouse
@you.left = mouse[1] - (paddle_size / 2)
nx, ny = (@ball.left + vx).to_i, (@ball.top + vy).to_i
# move the @comp paddle, speed based on `compuspeed` variable
@comp.left +=
if nx + (ball_diameter / 2) > @comp.left + paddle_size; compuspeed
elsif nx < @comp.left; -compuspeed
else 0 end
# if the @you paddle hits the ball
if ny + ball_diameter > app.height and vy > 0 and
(0..paddle_size).include? nx + (ball_diameter / 2) - @you.left
vx, vy = (nx - @you.left - (paddle_size / 2)) * 0.25, -vy * bounce
ny = app.height - ball_diameter
end
# if the @comp paddle hits the ball
if ny < 0 and vy < 0 and
(0..paddle_size).include? nx + (ball_diameter / 2) - @comp.left
vx, vy = (nx - @comp.left - (paddle_size / 2)) * 0.25, -vy * bounce
ny = 0
elsif nx + ball_diameter > app.width or nx < 0
vx = -vx
end
@ball.move nx, ny
end
end
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