How to CFrame surface to surface?

Help and Feedback Scripting Support
1

So Imagine I have a house,
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The Primary CFrame of the the group is the bottom base of the house.

Now Imagine I got a flat terrarin,
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What I want is to attach the bottom of the house with the top surface of the terrarin. How am i suppose to do this?

2

You could probably just raycast down, get the hit normal, and then set the CFrame of the house based on the normal and hit position.

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3

Guess I have to learn normal’s and hit positions…

4

Well the normal is essentially the direction a raycast hit is facing.

Let’s say you raycast down on a part.

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image623Ă—526 42.9 KB

That green ball can represent the hit position.
The normal basically just means the orientation of the hit surface. In this case, it would point out from the hit angled a bit because the part is rotated.
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(yes I built an arrow out of attachments; I’m too lazy to draw on it)

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5

That’s pretty cool, I will surely try fiddleing with it…

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