Roblox grid placement system for attachments

[Guest_2000123145]

1. What do you want to achieve?
   I want a building system inside of my game exactly how roblox has it’s building system when it comes to placing down attachments.

2. What is the issue?
   I don’t know how to make it

3. What solutions have you tried so far?
   I’ve tried youtube, this devforum, etc. Can’t find one.

Additional info to replicate behavior:
The roblox grid system is 0.125 studs; It places the attachments at 0.125 stud intervals. For example: These four attachments have the positions: -14.125, 0, 0 / -14, 0, 0 / -13.875, 0, 0 and -13.75, 0, 0.

They’re also half way inside whatever part they’re placed on:

I did this in about 10 seconds, just a super easy grid/placement system.

Thanks!

[meet_theHAXER (HAXXER)]

grid system is easy:
Suppose you have a random position 0.142, 0, 2.107

you want the interval to be whatever studs, so you will round them like this:
for x:
first divide by interval you will get 0.142/0.125 = 1.136
round it up it will become 1
now multiply it back by interval, 1*0.125 = 0.125

for z:
first divide by interval you will get 2.107/0.125 = 16.856
round it up it will become 17
now multiply it back by interval, 17*0.125 = 2.125

there you go, you have the grid system

[Guest_2000123145]

Sure, that could work, and that’s what I’ve tried doing. However, my attachment can appear inside of another part.

Say we have a 2x2x2 cube at 0,1,0. The back face of the cube is at ~,~, -1. Now, lets take that through your formula.
-1/0.125 = -8
-8 * 0.125 = -1

So now my… wait that theoretically works!? Hold on, let me try that! Give me an hour though, I’m in school rn

[Guest_2000123145]

IT WORKS!!!

THANK YOU SOO MUCH!!!