Do some preparation for touch config screen

funcs.lua

@@ -68,16 +68,43 @@ function formatBigNum(number)
     else
         return
     end
-    local pos = Mod1(string.len(s), 3)
+    local pos = math.mod1(string.len(s), 3)
     return string.sub(s, 1, pos)
         .. string.gsub(string.sub(s, pos+1), "(...)", ",%1")
 end
 
-function Mod1(n, m)
-    -- returns a number congruent to n modulo m in the range [1;m] (as opposed to [0;m-1])
+function math.clamp(x, min, max)
+    if max < min then
+        min, max = max, min
+    end
+    return x < min and min or (x > max and max or x)
+end
+
+-- Returns a number congruent to n modulo m in the range [1;m] (as opposed to [0;m-1])
+function math.mod1(n, m)
     return ((n-1) % m) + 1
 end
 
+---Round a number with specified unit
+---@param n number
+---@param u number # Default: 10
+---@return number
+function math.roundUnit(n,u)
+    local u = u or 10
+    return math.floor(n/u+.5)*u
+end
+
+---@param t1 table
+---@param t2 table
+---@return table t
+---Merge 2 tables into one<br>(**WARNING**: t2 can **overwrite** some value of t1 if both tables have some same keys!)
+function table.merge(t1,t2)
+    local t
+    for k, v in pairs(t1) do t[k] = v end
+    for k, v in pairs(t2) do t[k] = v end
+    return t
+end
+
 function table.contains(table, element)
     for _, value in pairs(table) do
           if value == element then
@@ -107,13 +134,6 @@ function table.lowest(table)
 	return lowest
 end
 
-function math.clamp(x, min, max)
-    if max < min then
-        min, max = max, min
-    end
-    return x < min and min or (x > max and max or x)
-end
-
 function drawText(text, x, y, size, orientation, color)
 	if color == nil then color = {1, 1, 1, 1} end
 	love.graphics.setFont(FONT_tromi)