How to See If Two Parts Are Touching

Help and Feedback Scripting Support
1

Hey fellow scripters! I wanted to make a system where if two parts were touching, they would snap together like Legos! I do not know how to do this, and I have tried looking through the dev forum, but I could not find anything that fits my needs. Thank you in advance, and let me know if you need anything more from me!

2

You can just use the Touched event of BaseParts:
https://create.roblox.com/docs/reference/engine/classes/BasePart#Touched

Depending on your specific use case, you can also look at raycasting.

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3

So when I try to do that it is required that one part is anchored but I want to be able to use a drag detector to drag the parts around. When I drag the anchored part it does not have the physics of the unanchored part that I want.


[Anchored part dragged first, and unanchored dragged second]

4

edit: nvm i’m stupid lmao, reread what you wanted. i’ll try to find a different solution

5

WAIT

6

You could anchor a part when it’s not being dragged. Does your envisioned system have any reason why that wouldn’t work?

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7

YES I JUST THOUGHT OF THAT :joy:

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8

I just realized that I could just anchor the part once it is placed so then the next piece is touching the anchored part!

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9

Hey i have a question. So if I am trying to make a lego brick connecting type thing where should I put the script that handles if the parts touch?

10

Try out CollectionService

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11

So would I make a collection service and then make a script where it applies to every part with that collection?

12

You don’t “make” a collection service—it’s a service, like Workspace or ServerStorage.

What you can do, is add a tag to your bricks, like Snappable or something idk. Then, you can use CollectionService to get every Instance that has this tag.

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13

Ok thank you! Lol I am not very experienced with the advanced services or anything really :joy:

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14

If you want the docs for collection service, the blue text I sent is actually a link to it.

@asher_dz

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15

Thank you! I will use it!

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16

Don’t hesitate to ping me (@Microwave_Toothpaste) if you need any more help.

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17

Thank you for being so helpful! I really appreciate it!!!

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