hw6

throw garbage

by Rebecca Chen

HTML

<div id="info">trash
  <br>
  <button id="thtrow" style="width:20%">throw</button>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r78/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js">


</script>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>

CSS

#info {
  position: absolute;
  top: 2%;
  width: 100%;
  padding: 10px;
  text-align: center;
  color: #ffff00
}

body {
  overflow: hidden;
}

JavaScript

var scene, renderer, camera;
var controls;
var pos, vel, force;
var ball;
var clock = new THREE.Clock();

init();
animate();

$("#thtrow").click(
  function() {
    pos.set(0, 50, 0);
    vel.set(30, 0, 0);
    force.set(0, -10, 0);
  }
);

function init() {
  scene = new THREE.Scene();
  renderer = new THREE.WebGLRenderer();
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.setClearColor(0x888888);
  document.body.appendChild(renderer.domElement);

  camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
  camera.position.z = 500;
  controls = new THREE.OrbitControls(camera, renderer.domElement);

  var gridXZ = new THREE.GridHelper(100, 10, 'red', 'white');
  scene.add(gridXZ);

  window.addEventListener('resize', onWindowResize, false);
  ////////////////////////////////////////////////////////////
  ball = new THREE.Mesh(new THREE.SphereGeometry(3, 20, 20), new THREE.MeshNormalMaterial());
  scene.add(ball);

  pos = new THREE.Vector3(0, 50, 0);
  vel = new THREE.Vector3(30, 0, 0);
  force = new THREE.Vector3(0, -10, 0);

}

function onWindowResize() {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(window.innerWidth, window.innerHeight);
}

function animate() {
  var dt = clock.getDelta();
  controls.update();
  requestAnimationFrame(animate);

  vel.add(force.clone().multiplyScalar(dt));
  pos.add(vel.clone().multiplyScalar(dt));
  ball.position.copy(pos);

  if (pos.y < 0) {
    force.y = 0;
    vel.set(0, 0, 0);
  }

  renderer.render(scene, camera);
}