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require 'sdl'
SDL.init( SDL::INIT_VIDEO )
screen = SDL::setVideoMode(640,480,16,SDL::SWSURFACE)
image = SDL::Surface.loadBMP("icon.bmp")
image.setColorKey( SDL::SRCCOLORKEY || SDL::RLEACCEL ,0)
$image = image.displayFormat
class Sprite
def initialize
@x=rand(640)
@y=rand(480)
@dx=rand(11)-5
@dy=rand(11)-5
end
def move
@x += @dx
if @x >= 640 then
@dx *= -1
@x = 639
end
if @x < 0 then
@dx *= -1
@x = 0
end
@y += @dy
if @y >= 480 then
@dy *= -1
@y = 479
end
@y += @dy
if @y < 0 then
@dy *= -1
@y = 0
end
end
def draw(screen)
SDL.blitSurface($image,0,0,32,32,screen,@x,@y)
end
end
sprites = []
for i in 1..5
sprites << Sprite.new
end
class MovableSp
def initialize()
@ud=@lr=0;
end
def move()
@ud=@lr=0;
@lr=-1 if SDL::Key.press?(SDL::Key::H) or SDL::Key.press?(SDL::Key::LEFT)
@lr=1 if SDL::Key.press?(SDL::Key::L) or SDL::Key.press?(SDL::Key::RIGHT)
@ud=1 if SDL::Key.press?(SDL::Key::J) or SDL::Key.press?(SDL::Key::DOWN)
@ud=-1 if SDL::Key.press?(SDL::Key::K) or SDL::Key.press?(SDL::Key::UP)
end
def draw(screen)
SDL.blitSurface($image,0,0,32,32,screen,300+@lr*50,200+@ud*50)
end
end
sprites << MovableSp.new
while true
while event = SDL::Event2.poll
case event
when SDL::Event2::Quit
exit
when SDL::Event2::KeyDown
exit if event.sym == SDL::Key::ESCAPE
end
end
screen.fillRect(0,0,640,480,0)
SDL::Key.scan
sprites.each {|i|
i.move
i.draw(screen)
}
screen.updateRect(0,0,0,0)
end
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