Engine calling update_event, key_pressed_event, and key_released_event

git-svn-id: svn://anubis/anaglym/trunk@98 99a6e188-d820-4881-8870-2d33a10e2619

tests/ballstairs.lua

@@ -1,9 +1,15 @@
 
-function update()
+function update_event()
     ballx, bally, ballz = ball:getPosition()
     ag.setCamera(7, -6, 15, ballx, bally, ballz, 0, 0, 1)
 end
 
+function key_pressed_event(key)
+    if (key == "d") then
+        ball2:destroy()
+    end
+end
+
 arena = ag.loadStaticModel("boxarena")
 ball = ag.loadModel("checkerball")
 ball:setPosition(-7, 7.4, 12)