in src/visual.ts [936:953]
public getRectAnimationSettings(firstValue: number, secondValue: number): LineAnimationSettings {
const isReverted: boolean = secondValue - firstValue < 0;
if (isReverted) {
return {
startX: firstValue,
endX: secondValue,
endWidth: firstValue - secondValue
};
}
// x always the same, in this case only width changes
return {
startX: firstValue,
endX: firstValue,
endWidth: secondValue - firstValue
};
}