function startTracking(e) {
e.preventDefault();
if (active) active.stop();
active = pointer()
.pipe(
(v) => {
const nodePos = node.getBoundingClientRect();
const nodeCenter = {
x: nodePos.left + (nodePos.width / 2),
y: nodePos.top + (nodePos.height / 2)
};
const angleFromCenter = angle(nodeCenter, v);
return angleFromCenter;
},
applyOffset(nodeRotation.get())
)
.start(nodeRotation);
}
.start((e) => {
e.preventDefault();
pointer(ballXY.get()).start(ballXY);
});