X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Factivity.cpp;fp=source%2Factivity.cpp;h=05a489259801245247b8d5fda67e9f337ce5a822;hb=cc29ebb178d4695573f10a829534cb660e14e79d;hp=0000000000000000000000000000000000000000;hpb=26fb816da7078d687f7540e2e0a2d525801592f7;p=netvis.git

diff --git a/source/activity.cpp b/source/activity.cpp
new file mode 100644
index 0000000..05a4892
--- /dev/null
+++ b/source/activity.cpp
@@ -0,0 +1,30 @@
+#include <cmath>
+#include <msp/time/units.h>
+#include "activity.h"
+
+using namespace Msp;
+
+Activity::Activity():
+	average(0)
+{ }
+
+void Activity::add_bytes(unsigned n)
+{
+	// Scale for correct integral
+	average += n*0.06935;
+}
+
+void Activity::tick(const Time::TimeDelta &dt)
+{
+	static Time::TimeDelta last_dt;
+	static float decay = 0;
+
+	if(dt!=last_dt)
+	{
+		// Half-life in 10 seconds
+		decay = pow(0.933f, dt/Time::sec);
+		last_dt = dt;
+	}
+
+	average *= decay;
+}