it works

mechanism.lua

@@ -6,19 +6,26 @@ require 'port'
 ---@param size GridPoint
 ---@return GridPoint
 local function nextxcorner( xcorner, size )
-    local cornerLookup = {
+    -- We're looking for old size
+    local cornerLookup1 = {
+        GridPoint:new( 0, 0 ),
+        GridPoint:new( size.y - 1, 0 ),
+        GridPoint:new( size.y - 1, size.x - 1 ),
+        GridPoint:new( 0, size.x - 1 )
+    }
+    local cornerLookup2 = {
         GridPoint:new( 0, 0 ),
         GridPoint:new( size.x - 1, 0 ),
         GridPoint:new( size.x - 1, size.y - 1 ),
-        GridPoint:new( size.x - 1, size.y - 1 )
+        GridPoint:new( 0, size.y - 1 )
     }
-    local index = TableFind(cornerLookup, xcorner, function(value) value:equals(xcorner) end)
-    if index < #cornerLookup then
+    local index = TableFind(cornerLookup1, xcorner, function(xc, value) return value:equals(xc) end)
+    if index < #cornerLookup1 then
         index = index + 1
     else
         index = 0
     end
-    return cornerLookup[index]
+    return cornerLookup2[index]
 end
 
 ---@class Mechanism
@@ -49,6 +56,7 @@ function Mechanism:new( position, size, ports, color )
 end
 
 function Mechanism:rotateClockwise()
+    self.size = GridPoint:new(self.size.y, self.size.x)
     self.xcorner = nextxcorner(self.xcorner, self.size)
     for _, port in ipairs(self.ports) do
         port:rotateClockwise()
@@ -58,8 +66,6 @@ end
 function Mechanism:draw()
     love.graphics.setColor(self.color)
     local x, y = self.position:globalCoords()
-    x = x - Config.cellSize / 2
-    y = y - Config.cellSize / 2
     local w, h = self.size:globalCoords()
     love.graphics.rectangle("fill", x, y, w, h)
     for _, port in ipairs(self.ports) do