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require 'sdl'
SDL.init(SDL::INIT_VIDEO)
screen = SDL::Screen.open(640, 480, 16, SDL::SWSURFACE)
SDL::WM::set_caption('testsprite.rb','testsprite.rb icon')
image = SDL::Surface.load_bmp("icon.bmp")
image.set_color_key(SDL::SRCCOLORKEY ,0)
$image = image.display_format
class Sprite
def initialize
@x=rand(640)
@y=rand(480)
@dx=rand(11)-5
@dy=rand(11)-5
end
def move
@x += @dx
if @x >= 640 then
@dx *= -1
@x = 639
end
if @x < 0 then
@dx *= -1
@x = 0
end
@y += @dy
if @y >= 480 then
@dy *= -1
@y = 479
end
@y += @dy
if @y < 0 then
@dy *= -1
@y = 0
end
end
def draw(screen)
SDL::Surface.blit($image, 0, 0, 32, 32, screen, @x, @y)
end
end
sprites = []
for i in 1..100
sprites << Sprite.new
end
while true
while event = SDL::Event.poll
case event
when SDL::Event::KeyDown, SDL::Event::Quit
exit
end
end
screen.fill_rect(0, 0, 640, 480, 0)
sprites.each {|i|
i.move
i.draw(screen)
}
screen.update_rect(0, 0, 0, 0)
end
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