Hi heba, In case you refer to the example '3D Models - Snap To Screen', the touch direction inaccuracy is expected since this example only shows how to bind JS events to our API and does not handle the cases where those touch events might need to be converted in order to improve the experience.
In general AR.Property Animations are very smooth since they run in our 30-60 FPS render loop.
almost 6 years ago
The rotation of 3D model isn't smooth, sometimes be in opposite of touch direction or not in correct direction over all
I use your sample of car by this values -> AR.PropertyAnimation(this.modelCar, "rotate.roll", -25, 335, 10000);