fix(math): torgba types and alpha value

imports/math/shared.lua

@@ -32,7 +32,7 @@ function math.toscalars(input, min, max, round)
     local i = 0
 
     for s in string.gmatch(input:gsub('[%w]+%w?%(', ''), '(-?[%w.%w]+)') do
-        local n = parseNumber(s, min, max, round)
+        local n = parseNumber(s, min, max, round and (round == true or i < round))
 
         i += 1
         arr[i] = n
@@ -45,7 +45,7 @@ end
 ---@param input string | table
 ---@param min? number
 ---@param max? number
----@param round? boolean
+---@param round? boolean | number If round is a number, only round n values.
 ---@return number | vector2 | vector3 | vector4
 function math.tovector(input, min, max, round)
     local inputType = type(input)
@@ -89,11 +89,14 @@ function math.normaltorotation(input)
     error(('cannot convert type %s to a rotation vector'):format(inputType), 2)
 end
 
----Tries to convert its argument to a vector.
+---Tries to convert its argument to a vector4.
 ---@param input string | table
----@return number | vector2 | vector3 | vector4
+---@return vector4
 function math.torgba(input)
-    return math.tovector(input, 0, 255, true)
+    local res = math.tovector(input, 0, 255, 3)
+    assert(type(res) == 'vector4', 'cannot convert input to rgba')
+    parseNumber(res.a, 0, 1)
+    return res
 end
 
 ---Takes a hexidecimal string and returns three integers.