Question How to transform from worldspace to localspace and back with new math library?

Hi,

I need to convert some old code, but i cannot find the right methods in the new math library

Can you guys help me?

Code (CSharp):

1.  
2. var localMovement= transform.InverseTransformDirection(_rigidbody.velocity);
3. //[...] some transformation of localMovement
4. _rigidbody.velocity = transform.TransformDirection(localMovement);
5.  

 

This should do it:

Code (CSharp):

1.  
2. var localMovement= math.rotate(math.inverse(transform.rotation), _rigidbody.velocity);
3. //[...] some transformation of localMovement
4. _rigidbody.velocity = math.rotate(transform.rotation, localMovement);
5.  

The important thing here is that Unity.Mathematics.math works with Unity.Mathematics.quaternion, which you will be using a lot. Unity.Mathematics.quaternion has some quirks, though. Such as .Euler requiring Radians instead of Degrees.

 

You are a lifesaver, this works flawlessly

 

if you want to use Transform Functions like normal GO workflow, the Matrix4x4 contains many of them.
https://forum.unity.com/threads/transform-inversetransformdirection-for-ecs.652543/#post-4776839