From 76bc8d4482bf5e84ef309b32efbdcb0ed7840f08 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20Hlusi=C4=8Dka?= <jakub.hlusicka@email.cz>
Date: Wed, 31 Aug 2016 22:47:54 +0200
Subject: [PATCH] print out FPS in debug

---
 src/simulation.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/simulation.rs b/src/simulation.rs
index 0e81c6b..f1ff06d 100644
--- a/src/simulation.rs
+++ b/src/simulation.rs
@@ -2,7 +2,9 @@ use std::collections::HashSet;
 use std::time::Instant;
 use std::time::Duration;
 use std::marker::PhantomData;
+use num::One;
 use na;
+use na::Cast;
 use na::Point2;
 use na::Vector2;
 use glium::DisplayBuild;
@@ -102,6 +104,13 @@ impl<F: CustomFloat> Simulation<F> {
             delta = now - self.last_updated_instant.unwrap();
         }
 
+        if self.context.debugging {
+            let delta_millis: F = <F as One>::one()
+                / Cast::from((delta * 1000).as_secs() as f64 / 1000.0);
+
+            println!("FPS: {}", delta_millis);
+        }
+
         self.last_updated_instant = Some(now);
         let result = self.context.update(self.facade.as_mut().unwrap(), self.debug);