How to determine neighboring points?

Question

JavaScript

There is a 3d scene on which there are many points, when choosing the Y point, I need to find the nearest points to the left and right.
I managed to determine the nearest points due to the distanceTo function

var myPoint = new THREE.Vector3(point.x, point.y, point.z)
for (var i = 0; i < points.length; i++) {
var vector = new THREE.Vector3(points[i].x, point.y, points[i].z);
//получаю дистанцию
myPoint.distanceTo(vector);
}

But the problem is that due to this I can determine the nearest points, but the sides are not taken into account here. And I just need to find the point on the left and right. Need ideas on how to make it work

Answer 1

There is nothing easier to check that the point is to the right of myPoint:
point.x < point[i].x