From e7c5efe8e4216dc00068c54658aadbba5b1e4556 Mon Sep 17 00:00:00 2001
From: "M. Sz" <mszeptuch@protonmail.com>
Date: Thu, 25 Feb 2021 09:30:59 +0100
Subject: [PATCH] cof: added SpeedToFPS method

---
 d2common/d2fileformats/d2cof/helpers.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 d2common/d2fileformats/d2cof/helpers.go

diff --git a/d2common/d2fileformats/d2cof/helpers.go b/d2common/d2fileformats/d2cof/helpers.go
new file mode 100644
index 00000000..0cc7f73b
--- /dev/null
+++ b/d2common/d2fileformats/d2cof/helpers.go
@@ -0,0 +1,16 @@
+package d2cof
+
+// SpeedToFPS returns FPS value basing on cof's speed
+func (c *COF) SpeedToFPS() float64 {
+	const (
+		baseFPS      = 25
+		speedDivisor = 256
+	)
+
+	fps := baseFPS * (float64(c.Speed) / speedDivisor)
+	if fps == 0 {
+		fps = baseFPS
+	}
+
+	return fps
+}