Little refactoring

config.lua

@@ -1,3 +1,5 @@
+require 'tablefuncs'
+
 -- Global config table
 ---@class Config
 ---@field pointRadius number Radius of each grid point
@@ -27,31 +29,3 @@ Color = {
     green = { 0, 1, 0 },
     blue = { 0, 0, 1 }
 }
-
--- Find key by value in table by predicate
----@param table table
----@param value any
----@param pred function
----@return any
-function TableFind( table, value, pred )
-    for key, innervalue in pairs( table ) do
-        if pred( value, innervalue ) then
-            return key
-        end
-    end
-    return nil
-end
-
--- Find if value exists in table by predicate
----@param table table
----@param value any
----@param pred function
----@return boolean
-function TableHas( table, value, pred )
-    for _, innervalue in pairs( table ) do
-        if pred( value, innervalue ) then
-            return true
-        end
-    end
-    return false
-end

grid.lua

@@ -1,5 +1,6 @@
-require "config"
-require "point"
+require 'tablefuncs'
+require 'config'
+require 'point'
 
 -- Game grid table, acts as "global level" of some sort
 ---@class Grid

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

line.lua

@@ -1,4 +1,5 @@
-require "gridpoint"
+require 'tablefuncs'
+require 'gridpoint'
 
 -- Interactive game object
 ---@class Line

main.lua

@@ -1,17 +1,6 @@
-require "grid"
-require "point"
-require "line"
-
--- Returns local coords from global
-local function snapCoords( point )
-    local x = math.ceil( point.x / Config.cellSize )
-    local y = math.ceil( point.y / Config.cellSize )
-    return GridPoint:new( x, y )
-end
-
-local function vectorLength( startpoint, endpoint )
-    return math.sqrt( ( startpoint.x - endpoint.x ) ^ 2 +  ( startpoint.y - endpoint.y ) ^ 2 )
-end
+require 'grid'
+require 'point'
+require 'line'
 
 function love.load()
     love.graphics.setLineStyle( Config.lineStyle )
@@ -37,6 +26,9 @@ function love.load()
     )
     GameGrid:push( line2 )
 
+    ---@class Mouse
+    ---@field lastLine Line?
+    ---@field lastPoint Point?
     Mouse = {
         x = 0,
         y = 0,
@@ -60,11 +52,11 @@ function love.update( dt )
     Mouse.lastPoint = Mouse.point
     Mouse.lastPressed = Mouse.pressed
     Mouse.pressed = love.mouse.isDown( 1 )
-    Mouse.point = snapCoords( Point:new( Mouse.x, Mouse.y ) )
+    Mouse.point = GridPoint.snapCoords( Point:new( Mouse.x, Mouse.y ) )
     if Mouse.lastLine ~= nil then
         local pointsLen = #Mouse.lastLine.points
         local lastLinePoint = Mouse.lastLine.points[pointsLen]
-        if vectorLength( Mouse.point, lastLinePoint ) == 1
+        if Mouse.point:distanceTo( lastLinePoint ) == 1
             and GameGrid:inBounds( Mouse.point )
             and GameGrid:matchesLine( Mouse.point, true ) == nil
             and not lastLinePoint:equals( Mouse.lastLine.endpoint )
@@ -81,7 +73,7 @@ function love.update( dt )
 
     Mouse.dragged = Mouse.pressed
         and Mouse.startX > 0
-        and vectorLength(
+        and Point.distanceTo (
             Point:new( Mouse.x, Mouse.y ),
             Point:new( Mouse.startX, Mouse.startY )
         ) > Config.dragSensivity
@@ -114,5 +106,3 @@ function love.draw()
             love.graphics.print( tostring( Mouse.lastLine ), 128, 300 )
     end
 end
-
-

point.lua

@@ -29,3 +29,14 @@ end
 function Point:coords()
     return self.x, self.y
 end
+
+-- Return vector length between points
+---@param point Point
+---@return number
+function Point:distanceTo( point )
+    return math.sqrt(
+        ( self.x - point.x ) ^ 2 +
+        ( self.y - point.y ) ^ 2
+    )
+end
+

tablefuncs.lua

@@ -0,0 +1,27 @@
+-- Find key by value in table by predicate
+---@param table table
+---@param value any
+---@param pred function
+---@return any
+function TableFind( table, value, pred )
+    for key, innervalue in pairs( table ) do
+        if pred( value, innervalue ) then
+            return key
+        end
+    end
+    return nil
+end
+
+-- Find if value exists in table by predicate
+---@param table table
+---@param value any
+---@param pred function
+---@return boolean
+function TableHas( table, value, pred )
+    for _, innervalue in pairs( table ) do
+        if pred( value, innervalue ) then
+            return true
+        end
+    end
+    return false
+end