3D Game Programming for Kids, 2nd Edition

Building a Forest with Functions

We’ll need a lot of trees for our forest. We could build them one at a time, but we’re not going to do that. Instead, let’s add the following JavaScript after all of the avatar body parts:

​function​ makeTreeAt(x, z) {
  ​var​ trunk = ​new​ THREE.Mesh(
    ​new​ THREE.CylinderGeometry(50, 50, 200),
    ​new​ THREE.MeshBasicMaterial({color: ​'sienna'​})
  );

  ​var​ top = ​new​ THREE.Mesh(
    ​new​ THREE.SphereGeometry(150),
    ​new​ THREE.MeshBasicMaterial({color: ​'forestgreen'​})
  );
  top.position.y = 175;
  trunk.add(top);

  trunk.position.​set​(x, -75, z);
  scene.add(trunk);
}

makeTreeAt( 500, ...