About Transform.TransformDirection()

[Guybrush]

Hi Nina,

Thanks a lot for your detailed response.

@Nina

The DrawRay method uses a starting and a target point in World Space coordinates to draw the ray.

Yes

@Nina

If you rotate the game object and want to align the ray with a specific axis “controlled” by the game object, you have to rotate the ray along with the game object.

Yes

@Nina

Fortunately, you don’t have to do the maths yourself because Unity provides a method for you: TransformDirection.

Yes, TransformDirection does this. However, what confuses me is its API definition. From our conversation we both agree that TransformDirection takes a world space coordinates and turns it into local space. Otherwise to ray does not rotate along with the game object. Yes?

But the API definition of TransformDirection says that it “transforms direction from local space to world space.”

I totally understand what TransformDirection does in this case but it does not seem to match its API description.