How to define an origin to a Spacial vector

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Hello everyone!
I have one triangular mesh consequently I have an array with the normal vector of each triangles.
Here's the thing. I don't really understand how this works but this normals are free in space right?
I want to give them an origin point like. I want to define that the normal v1 must have its origin in the point 0,0,0.
How can I do this?
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Guillaume
Guillaume 2019-4-2
I think you need to explain better what you want (and what that has to do with matlab). A mathematical vector does not have an origin, that makes no sense. A vector is just a direction. However, you can certainly store a point together with a vector.

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