Recently I'v finished "game speed" property. This parameter I need to speed up some simulation parts. Now, finally, is engine working properly. I'v measured right Creature speed across different game speed settings and I'v realized that my previous algorithm was making phantom time differences in higher speeds. Currently is everything all right, and creatures are moving exactly fast in every game speed.
Something to my timer settings:
1.Main Update is runnig at 25 fps (40msec)
2.Background Update is running at 4 fps (250msec)
With speed of "2" I have updates in 125msec/20msec. Speed modifier is just divider to the timers.
Screens from right results for creature movement in speed of "1" and "2". Delta time is now correct.
The brake parameter is criterion of how to slow down creature movement until they are facing right direction. More angle they need turn, more brake is needed to ther movement
Curretnly I'm working on Nature as gameObject type and its substances.