Little refactoring

gridpoint.lua

@@ -1,5 +1,5 @@
-require "point"
-require "config"
+require 'point'
+require 'config'
 
 -- Point table with grid-based coordinates
 ---@class GridPoint: Point
@@ -17,5 +17,15 @@ end
 -- Same as coords, but converted to global coords
 ---@return number, number
 function GridPoint:globalCoords()
-    return self.x * Config.cellSize - Config.cellSize / 2, self.y * Config.cellSize - Config.cellSize / 2
+    return self.x * Config.cellSize - Config.cellSize / 2,
+    self.y * Config.cellSize - Config.cellSize / 2
+end
+
+-- Returns local coords from global
+---@param point Point
+---@return GridPoint
+function GridPoint.snapCoords( point )
+    local x = math.ceil( point.x / Config.cellSize )
+    local y = math.ceil( point.y / Config.cellSize )
+    return GridPoint:new( x, y )
 end