So till now the user is able to place

[burnt condor]

what do you mean by stacking

[digital shard]

placing multiple prefabs on top of one another

[burnt condor]

so I take it that you can place multiple things in a single tile

[digital shard]

yes sir

[burnt condor]

so what cannot be erased?

[digital shard]

these hearts

cNnot be erase and can be stacked

[burnt condor]

so my understanding is that the tiles determine where the player can place prefabs on

[digital shard]

that eraser tool should be able to erase

[burnt condor]

Whats the code for erasing things

[digital shard]

those gray can be but hearts canot

[digital shard]

i jus replace tile with empty

just passing no tiles erases them

[burnt condor]

Have you checked that if your raycast can actually detect the hearts?

[digital shard]

what is a raycast

[burnt condor]

my bad

yours is a 2D game

https://docs.unity3d.com/ScriptReference/Physics2D.Raycast.html

you should be using the 2D part of Physics

[digital shard]

yes

[burnt condor]

read up a bit on the raycasting

[digital shard]

2D has raycast too

[burnt condor]

yes

the concept is just casting a ray into the world and getting back anything that ray intercepts with

in your case, we want it to intercept with the hearts, retrieve them in code and then destroy them

[digital shard]

i havent used it till now, is it bad?

[burnt condor]

No its not. Its probably the most go to way to interact with the world

[digital shard]

so.. how do i do that

[digital shard]

gotcha

[burnt condor]

here's where you'll have to do a little bit of digging around youtube/stackoverflow or just the internet itself

[digital shard]

need to create a raycast too right?

[burnt condor]

yep. plenty of tutorials on youtube on raycasting

[digital shard]

create ray, check if it collides, and destory if it collides with hearts

oke i will check it and contact u again

[burnt condor]

yes you got it

[digital shard]

thank you very much

[digital shard]

so a raycast needs an initial point and it can be mouse click?

[burnt condor]

yes it can

for that you'll need a reference to the camera

[digital shard]

oke

[burnt condor]

https://docs.unity3d.com/ScriptReference/Camera.ScreenPointToRay.html

[digital shard]

the raycast only worked when i instantiate it

after the prefab is spawned it didnt detect hit

[burnt condor]

Try doing a Debug.Log on the obejct you've hit to make sure its really the heart its intercepting with

Note that for the raycast to hit something, that something needs a collider on it

[digital shard]

yep

i need to use raycatHit2d ?

[burnt condor]

yes i think thats the correct one

my apologies

[digital shard]

cannot convert to 2d

if i use this it does work but like earlier, it doesnt show hit after it is already created

[burnt condor]

https://docs.unity3d.com/ScriptReference/Physics2D.Raycast.html

here

raycasting in 2D is formatted slightly different than in 3D

[digital shard]

how do i destroy the gameobject i touch

mean

what does this men

i require your assistance again

i did the destroy part but how do i make them non stackable

[burnt condor]

hmm it appears you are trying to destroy the prefab itself

try Destroy(hit.collider.gameobject) instead