3D Game Programming for Kids, 2nd Edition

Pushing and Pulling Shapes

In 3D programming, shapes are much easier to change than you might guess. As far back as Chapter 1, ​Project: Creating Simple Shapes​, we’ve known how to change a shape’s size, chunkiness, and rotation. It turns out that we can do even more. Lots more.

To see this, add a call to addGround() below the START CODING line. Then define the addGround() function as shown:

var ground = addGround();

function addGround() {
  var faces = 99;
  var shape = new THREE.PlaneGeometry(10, 20, faces, faces);

  var _cover = new THREE.MeshPhongMaterial({color: 'green', shininess: 0});
  var cover = Physijs.createMaterial(_cover, 0.8, 0.1);

  var mesh = new Physijs.HeightfieldMesh(shape, cover, 0);
 mesh.rotation. ...