get vertex from an obj file.

hello guys...i've a question.

you can access the vertex of an obj file ?

i try with this...but it doesn't work.

import peasy.*;
PShape shp;
PeasyCam cam;

void setup() {
  size(1000, 1000, P3D);
  shp=loadShape("face.obj");
  println(shp.getVertexCount());
  cam = new PeasyCam(this, 100);
  cam.setMinimumDistance(50);
  cam.setMaximumDistance(500);
}

void draw() {
  lights();
  directionalLight(255, 150, 200, -1, 0, 0);
  background(0);
  shape(shp);
}

the result of println(shp.getVertexCount()) is 0.

thank you!! :)