From dcfa657f649a4b64942f157b359f40720a994f7c Mon Sep 17 00:00:00 2001
From: Kazhnuz <antoine@sortilege.net>
Date: Sat, 27 Apr 2019 22:04:18 +0200
Subject: [PATCH] utils: add a simple function to substract a variable to
 another to zero

---
 gamecore/utils/math.lua | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/gamecore/utils/math.lua b/gamecore/utils/math.lua
index 4168c6b..1c29373 100644
--- a/gamecore/utils/math.lua
+++ b/gamecore/utils/math.lua
@@ -40,6 +40,16 @@ function Math.round(num)
   return math.floor(num + 0.5)
 end
 
+function Math.toZero(num, sub)
+  local sub = math.floor(sub)
+
+  if math.abs(num) < sub then
+    return 0
+  else
+    return num - (sub * Math.sign(num))
+  end
+end
+
 -- VECTOR/DIRECTION functions
 -- Easy-to-use function to handle point and motion