Correction of animation mechanics.

I think I found a "bug" in the system animations triggered by a real value type used as the frame number instead of using integers, it provokes the overlay of distortions in the transitions between frames, I need extreme accuracy in of animation frames, that is, I mean that the frames are not divided into smaller pieces after the decimal point, and used (INT-U32) type instead of (float F32). how can I fix it? Who can tell all the points of entry to make it right without breaking at this time, anything else?