Find the closest point position

Questions
1

I’m having a project with 4 planes with an image on it. I’m using orbitcontrols to move around the 4 planes. The 2 pictures here give you and idea what I mean:

frontview
frontview1440×1024 17.4 KB

topview
topview1440×1024 21.1 KB

What I want now is that when you stop dragging with the orbitcontrols and for example, you end up with the camera position (4, 0, -4) like in the example, the camera needs to snap to the closest plane position. My question is how I need to calculate this with a Vector3, so it returns the position of the plane that is the closets to the stop point.

2

Have you considered to compute the (squared) euclidian distance from your stop point to all plane positions and then choose the plane with the smallest distance?

3

function get_info(c_p) {
var ps = [ [0, 0, 0], [10, 0, -10], [0, 0, -20], [-10, 0, -10] ];
function g_dis(pos) { return Math.hypot( pos[0] - c_p[0], pos[1] - c_p[1], pos[2] - c_p[2] ); };
ps.forEach( (_, i) => ps[i] = [i+1,_, g_dis(_)] );
return ps.sort( (a,b) => a[2] - b[2] );
}
Ex: alert( get_info( [4, 0, -4] ).join('\n') );

The get_info function takes an array of [x,y,z] and returns a two dimensional array sorted by shortest distance.