From 78404ed56c12a0c57af9c40ef2150023991a146b Mon Sep 17 00:00:00 2001
From: "M. Sz" <mszeptuch@protonmail.com>
Date: Thu, 25 Feb 2021 09:33:47 +0100
Subject: [PATCH] cof: added Duration method

---
 d2common/d2fileformats/d2cof/helpers.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/d2common/d2fileformats/d2cof/helpers.go b/d2common/d2fileformats/d2cof/helpers.go
index 0cc7f73b..0b3b7fb2 100644
--- a/d2common/d2fileformats/d2cof/helpers.go
+++ b/d2common/d2fileformats/d2cof/helpers.go
@@ -14,3 +14,14 @@ func (c *COF) SpeedToFPS() float64 {
 
 	return fps
 }
+
+// Duration returns animation's duration
+func (c *COF) Duration() float64 {
+	const (
+		milliseconds = 1000
+	)
+
+	frameDelay := milliseconds / c.SpeedToFPS()
+
+	return float64(c.FramesPerDirection) * frameDelay
+}