require 'sdl' #require 'opengl' SDL.init( SDL::INIT_VIDEO ) screen = SDL::setVideoMode(640,480,16,SDL::SWSURFACE) #screen.setClipRect( 50,50,400,200 ) SDL::WM::setCaption('testsprite.rb','testsprite.rb icon') image = SDL::Surface.loadBMP("icon.bmp") image.setColorKey( SDL::SRCCOLORKEY ,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..100 sprites << Sprite.new end event=SDL::Event.new while true if event.poll != 0 then if event.type==SDL::Event::QUIT then break end if event.type==SDL::Event::KEYDOWN then exit end end screen.fillRect(0,0,640,480,0) sprites.each {|i| i.move i.draw(screen) } screen.updateRect(0,0,0,0) ObjectSpace.garbage_collect end