question

Here is a quick rundown of how you should structure your kinematics code:

Add a label to the object that stores whether it is currently animating using kinematics. We'll call this animLabel.

Add a label to the object for the kinematics. We'll call this kinNode.

OnReset:

animLabel = 0;
deactivatekinematics(kinNode);

Trigger where kinematics start:

initkinematics(kinNode, current);
addkinematic(kinNode, ...);
addkinematic(kinNode, ...);
double endtime = addkinematic(kinNode, ...);
updatekinematics(kinNode, current);
senddelayedmessage(current, endtime - Model.time, current);
animLabel = 1;

OnMessage:

animLabel = 0;
updatekinematics(kinNode, current);

OnDraw:

if (animLabel)
	updatekinematics(kinNode, current);

The OnMessage should call updatekinematics() one last time at the end of the kinematic so that the object goes to its final position regardless of when the last time OnDraw was called (or if it ever was).