split internal modules

res/modules/internal/extensions/math.lua

@@ -0,0 +1,37 @@
+function math.clamp(_in, low, high)
+    return math.min(math.max(_in, low), high)
+end
+
+function math.rand(low, high)
+    return low + (high - low) * math.random()
+end
+
+function math.normalize(num, conf)
+    conf = conf or 1
+
+    return (num / conf) % 1
+end
+
+function math.round(num, places)
+    places = places or 0
+
+    local mult = 10 ^ places
+    return math.floor(num * mult + 0.5) / mult
+end
+
+function math.sum(...)
+    local numbers = nil
+    local sum = 0
+
+    if type(...) == "table" then
+        numbers = ...
+    else
+        numbers = {...}
+    end
+
+    for _, v in ipairs(numbers) do
+        sum = sum + v
+    end
+
+    return sum
+end