path finding in Unity3d 2D game.

Hi Dears,

sorry but I really got stuck in a 2d tower defense game.
I'm using Unity 4.5 with it's new 2d feature, I searched 2d path finding everywhere and can't find good solution.
unity3d navemesh? no, no x-y plan supported.
A* pathfinding? no, didn't find 2d support too.
could anyone here help me out here?

Thanks
Leo

 

Well, If its only tower defense, then i would suggest to use coroutines.

 

i think i seen something somewhere where people were using "Beacons" You drop 2 empty game objects and move the AI to one or the other and back and forth...

 

thank you Rutenis, is Corutines a way of multithread in C#? how can I use it in a 2D tower defense for pathfinding?

 

Thanks Kilrath, I googled but can't find Beacons that is 2D pathfinding related. would you let me know more ?

 

Its bassicly timing. You could easly calculate how much time it would take to change direction, in c#.

 

HI, I use Unity's built in pathfinding in my 2D game, as it doesn't work in XY I had to rotate everything 90 degrees including the camera, so everything looks the same but the axis are XZ, the Y being the height now (which we don't use). This way, the pathfinding works like a charm

 

http://giant.gfycat.com/ActualCrazyAtlanticblackgoby.gif

http://i.imgur.com/8ItpwUw.png

https://gist.github.com/rakkarage/c0b304dfd8023f672870

here is some astar 2d pathfinder code with no navmesh or colliders... maybe helpful

 

if its for a tower defence i should use waypoints, not pathfind, mybe you would like diferente paths on the map, and set the diferent paths arbritray.

 

You might want to try this.
http://arongranberg.com/astar

You don't have to flip everything to face 90 degrees like AgusB is suggesting. It may take you a day to get used to it but I managed to code my AI using this pathfinding tool with my 2D game and it's working very well!

I suggest you read through the tutorials:
http://arongranberg.com/astar/docs/getstarted.php

Just pay attention to a setting that allows you to use 2D colliders instead of 3D colliders. You may also have to flip the pathfinding graph that it creates so that it matches your game.

 

2d games A* is the standard method
but as calavera saiz for something as simple as a tower defense game where the aliens follow the same path you dont need A*