How to snap objects into place?

Unity Engine
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I’m currently doing a school project that lets users do breadboarding in VR. One thing I’d like to do is for users to select and place components in the right places on a breadboard, like this (skip to 8:25):

I currently have a model of a breadboard and can grab the electronics components (using Distance Grabbable script from Oculus samples). The model of the breadboard has individual components for every single pin-out. Given this, what’s a good way for me to snap components into the pin-outs? I’m quite new to unity dev and VR development, so any help here would be great.

model pic: Imgur: The magic of the Internet

Thanks!

2

Snapping into place takes a bit of math. The basic idea is:

  • Get the distance between the component position and the first column of holes, along (say) just the X axis: dist = part.x - firstHole.x;
  • Divide this by the hole spacing, round it, and then multiply by the hole spacing again. This rounds to the nearest multiple of the hole spacing: dist = Mathf.Round(dist / holeSpacing) * holeSpacing;
  • Add the position of the first column of holes back in: part.x = dist + firstHole.x;

You will probably need to do that for Z as well. And do all this when the part is released (when I presume you are also going to set the Y position to the proper value for an inserted part).

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