var nodes = ["cubeMesh1", "sphereMesh1", "cylinderMesh1"];
var cam = ccbGetActiveCamera();

ccbRegisterOnFrameEvent(function() {
    var nearObject = false;
    
    for (var i = 0; i < nodes.length; i++) {
        var nodePos = ccbGetSceneNodeProperty(ccbGetSceneNodeFromName(nodes[i]), "Position");
        var camPos = ccbGetSceneNodeProperty(cam, "Position");
        var distance = getDistance(nodePos.x, nodePos.y, nodePos.z, camPos.x, camPos.y, camPos.z);
        
        if (distance < 30) {
            print("near to: " + nodes[i]);
            nearObject = true;
            break; 
        }
    }
    
    if (!nearObject) {
        print("near to: nothing");
    }
});

function getDistance(x1, y1, z1, x2, y2, z2) {
    var dx = x2 - x1;
    var dy = y2 - y1;
    var dz = z2 - z1;
    
    return Math.sqrt(dx * dx + dy * dy + dz * dz);
}