examples/mnit_moles: regulate framerate

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/examples/mnit_moles/src/moles.nit b/examples/mnit_moles/src/moles.nit
index a28514c..99af690 100644 (file)
--- a/examples/mnit_moles/src/moles.nit
+++ b/examples/mnit_moles/src/moles.nit
@@ -18,6 +18,7 @@
 module moles
 
 import mnit
+import realtime
 
 class Hole
        var game : Game
@@ -174,6 +175,8 @@ class MyApp
 
        var screen : nullable Screen = null
 
+       var target_dt = 20000000
+
        init do super
 
        redef fun init_window
@@ -187,8 +190,16 @@ class MyApp
        do
                var screen = self.screen
                if screen != null then
+                       var clock = new Clock
+
                        screen.game.do_turn
                        screen.do_frame( display )
+
+                       var dt = clock.lapse
+                       if dt.sec == 0 and dt.nanosec < target_dt then
+                               var sleep_t = target_dt - dt.nanosec
+                               sys.nanosleep(0, sleep_t)
+                       end
                end
        end