gistfile1.diff

--- teeworlds-0.5.1-src/src/game/client/components/hud.cpp 
+++ teeworlds/teeworlds-0.5.1-src/src/game/client/components/hud.cpp 
@@ -18,7 +18,12 @@
 
 HUD::HUD()
 {
-	
+	// OR: memset(&fps_samples,0.0f,MAX_FPS_SAMPLES);
+	for(int i = 0; i < MAX_FPS_SAMPLES; i++)
+		fps_samples[i] = 0.0f;
+	
+	fps_sum = 0.0f;
+	fps_index = 0;
 }
 	
 void HUD::on_reset()
@@ -151,8 +156,18 @@
 {
 	if(config.cl_showfps)
 	{
+		// calculate avg. fps, 
+		fps_sum -= fps_samples[fps_index];
+		fps_sum += 1.0f / client_frametime();
+		fps_samples[fps_index] = 1.0f / client_frametime();
+		
+		// reset counter when max samples reached
+		fps_index++;
+		if(fps_index == MAX_FPS_SAMPLES-1)
+			fps_index = 0;
+		
 		char buf[512];
-		str_format(buf, sizeof(buf), "%d", (int)(1.0f/client_frametime()));
+		str_format(buf, sizeof(buf), "%d", (int)(fps_sum / MAX_FPS_SAMPLES));
 		gfx_text(0, width-10-gfx_text_width(0,12,buf,-1), 5, 12, buf, -1);
 	}
 }