Transform.right unexpected result

[heady osprey]

I'm having a small issue with Unity Transform:

This is the game window, I am hovering over the smaller subPart

The code that tells me the side I have selected:

float fwdBack = Vector3.Dot(target.transform.root.forward, hit.normal); // Z
            float rightLeft = Vector3.Dot(target.transform.root.right, hit.normal); // X
            float upDown = Vector3.Dot(target.transform.root.up, hit.normal);       // Y

This works perfectly for the bigger part, but the smaller one has an issue where transform.right returns a value -1.192093E-07

Not sure what to make of this or how to find a solution

[rotund mist]

A dot product of zero tells you that the vectors are orthogonal

(that number is essentially zero)

[heady osprey]

Yeah, but what if the Dot product returns -2.2853E-10

[rotund mist]

Then they're orthogonal

For all intents and purposes

[heady osprey]

Ahh, so I should treat that as a 0 then

[rotund mist]

You understand this number is just a really tiny decimal yes?

0.0000000002285...

[heady osprey]

Ahh, no i did not 😅

[rotund mist]

Scientific notation

[heady osprey]

I read that as "really big number" tbh

Whenever I see an E in a number

[rotund mist]

Pay attention to the exponent 😉

Negative exponent means small