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Question by wedermarco · Jul 21, 2020 at 10:51 PM · vector3vector2rubikscube

Get the rotation vector from 2 vectors

Hello, I'm trying to rotate a "Matrix". I have a 3x3 Matrix like shown on the image below.

Unity has no 3x3 Matrices so I tried solving it with Vectors.

If I have the starting Vector (-1/ -1) and the end Vector (-1 / 1) is there a way to get the rotation vector? (like an inverse Matrix) (I will have to solve this problem in 3 dimensions so to just get the angle between 2 vectors isn't a solution)

Thanks in advance :)

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Answer by andrew-lukasik · Jul 21, 2020 at 11:07 PM

Unity has no 3x3 Matrices

wat


 using Unity.Mathematics;
 
 var a = new float3x3();
 var b = new float3x3();
 var c = math.mul( a , b );
 var d = math.inverse(c);
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avatar image wedermarco · Jul 21, 2020 at 11:22 PM 0
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wow, all this time I didn't know this existed. Thanks a lot man. Do you know if there is also a way to have a 3 dimensional matrix like 3x3x3?

avatar image andrew-lukasik wedermarco · Jul 22, 2020 at 07:41 AM 0
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I've never seen 3x3x3. BUT. You can create this structure yourself - if you know the math behind well enough.

 public struct float3x3x3
 {
     public float3x3 c0;
     public float3x3 c1;
     public float3x3 c2;
 }

boom, DONE ; )


float3x3.cs

matrix multiplication code


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