Builtin: Add vector.floor helper function

builtin/common/vector.lua

@@ -31,6 +31,14 @@ function vector.normalize(v)
 	end
 end
 
+function vector.floor(v)
+	return {
+		x = math.floor(v.x),
+		y = math.floor(v.y),
+		z = math.floor(v.z)
+	}
+end
+
 function vector.round(v)
 	return {
 		x = math.floor(v.x + 0.5),
@@ -130,4 +138,3 @@ function vector.divide(a, b)
 			z = a.z / b}
 	end
 end
-

doc/lua_api.txt

@@ -1812,7 +1812,8 @@ Spatial Vectors
 * `vector.distance(p1, p2)`: returns a number
 * `vector.length(v)`: returns a number
 * `vector.normalize(v)`: returns a vector
-* `vector.round(v)`: returns a vector, each dimension rounded to floor
+* `vector.floor(v)`: returns a vector, each dimension rounded down
+* `vector.round(v)`: returns a vector, each dimension rounded to nearest int
 * `vector.apply(v, func)`: returns a vector
 * `vector.equals(v1, v2)`: returns a boolean