Add Lua helper functions vector.apply(v) math.sign(x, tolerance)

builtin/common/misc_helpers.lua

@@ -212,6 +212,17 @@ function math.hypot(x, y)
  return x * math.sqrt(1 + t * t)
 end
 
+--------------------------------------------------------------------------------
+function math.sign(x, tolerance)
+ tolerance = tolerance or 0
+ if x > tolerance then
+ return 1
+ elseif x < -tolerance then
+ return -1
+ end
+ return 0
+end
+
 --------------------------------------------------------------------------------
 function get_last_folder(text,count)
  local parts = text:split(DIR_DELIM)

builtin/common/vector.lua

@@ -39,6 +39,14 @@ function vector.round(v)
  }
 end
 
+function vector.apply(v, func)
+ return {
+ x = func(v.x),
+ y = func(v.y),
+ z = func(v.z)
+ }
+end
+
 function vector.distance(a, b)
  local x = a.x - b.x
  local y = a.y - b.y

doc/lua_api.txt

@@ -1280,6 +1280,7 @@ vector.distance(p1, p2) -> number
 vector.length(v) -> number
 vector.normalize(v) -> vector
 vector.round(v) -> vector
+vector.apply(v, func) -> vector
 vector.equals(v1, v2) -> bool
 For the following functions x can be either a vector or a number.
 vector.add(v, x) -> vector
@@ -1296,6 +1297,9 @@ dump(obj, dumped={})
 math.hypot(x, y)
 ^ Get the hypotenuse of a triangle with legs x and y.
  Useful for distance calculation.
+math.sign(x, tolerance)
+^ Get the sign of a number
+ Optional: Also returns 0 when the absolute value is within the tolerance (default 0)
 string:split(separator)
 ^ e.g. string:split("a,b", ",") == {"a","b"}
 string:trim()