Linear curves from script at runtime?

Hi,
We're loading model data, including animation from a custom format, and this implies creating Keyframes and Curves and Clips at runtime as the data is streamed on demand.

The issue I'm having is, I have not found a single working solution yet for setting specific keyframe tangents to linear.
Setting in and out tangent values doesn't change the fact that it remains a curve, we need to be able to change the tangent type
Is there any working solution for this?

This doesn't seem to work : https://forum.unity.com/threads/how-to-set-an-animation-curve-to-linear-through-scripting.151683/

Thanks.

Edit: Currently using a "hack", by duplicating every key one time forward, but this is not a perfect solution, while it does make the curves look more linear, it's a performance loss.

 

Have you ever tried out https://assetstore.unity.com/packages/tools/gui/runtime-curve-editor-11835? You can visually(not just from scripts) edit curves at runtime.

 

I was able to make it tangent:

Code (CSharp):

1.  
2.        AnimationCurve myCurve = new AnimationCurve(myKeyframes.ToArray());
3.  
4.         // Set here the keyframe tangents to Auto.
5.         for (int i = 0; i < myCurve.length; i++)
6.         {
7.             myCurve.SmoothTangents(i, 0);
8.         }

 

what is myKeyframes?