Need help with a TD

Need help with a TD

Does anyone know how to make a good blocking checker? I need a way to make it so you cant just block off the path. Please help!

1) use cliffs

2) use pathing blockers (find em at a doodad catogerie)

He wants a PATHING checker system to check if the path has been walled with towers and units can pass.

Its impossiable without making very laggy trigger systems.

What most tower systems use is the order unit to move to location so if the path is blocked the units flip into attack mode and kill the towers.

ahhh, k. well units start attacking by themselves if they cant complete their moving order. if they cant come to the other side theyll just start attacking

Thanks for the help guys! Now I can actually play online without cheaters