How to add object

[tufail]

I like to add objects here but i don't know how to use it please help me here are the example from normal javascript

loader.load('assets/ocean.obj', function (object) {
setMaterial(object, matOcean);
addObject(object);
});

loader.load('assets/land.obj', function (object) {
setMaterial(object, matLand);
addObject(object);
});

loader.load('assets/ice.obj', function (object) {
setMaterial(object, matIce);
addObject(object);

});