demo completed

mechanism.lua

@@ -55,6 +55,7 @@ function Mechanism:new( position, size, ports, color )
     return mechanism
 end
 
+---@return Mechanism
 function Mechanism:clone()
     local ports = {}
     for _, port in ipairs(self.ports) do
@@ -67,6 +68,25 @@ function Mechanism:clone()
         ports = ports,
         color = self.color
     }
+    setmetatable( mechanism, { __index = self } )
+
+    return mechanism
+end
+
+function Mechanism:intersectsPoint( point )
+    return point.x >= self.position.x and
+        point.x < self.position.x + self.size.x and
+        point.y >= self.position.y and
+        point.y < self.position.y + self.size.y
+end
+
+function Mechanism:intersectsOther( mechanism )
+    return mechanism.position.x + mechanism.size.x > self.position.x and
+        mechanism.position.x <
+        self.position.x + self.size.x and
+        mechanism.position.y  + mechanism.size.y > self.position.y and
+        mechanism.position.y < self.position.y + self.size.y
+
 end
 
 function Mechanism:rotateClockwise()