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index.html
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<!-- Gary Ang | Ming | playgrd -->
<!-- three.js port of Daniel Shiffman's Nature of Code Chapter 2-->
<!-- Multiple forces -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Nature of Code port in three.js</title>
<style>
</style>
<script type="text/javascript" src="./libs/three.js"></script>
<script type="text/javascript" src="./libs/OrbitControls.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.8/d3.min.js" type="text/JavaScript"></script>
<script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.7.2/p5.min.js"></script>
<script type="text/javascript" src="https://cdn.rawgit.com/josephg/noisejs/master/perlin.js"></script>
</head>
<body>
<div id='svg'></div>
<script>
var p5 = new p5();
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera( 100, window.innerWidth / window.innerHeight, 0.1, 1000 );
// var camera = new THREE.OrthographicCamera( 0,50,0,50, 0.1,1000 );
camera.position.z = 125;
camera.position.x = 50;
camera.position.y = 50;
var renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setClearColor( 0xF9B3D1, 1 );
document.body.appendChild( renderer.domElement );
var orbit = new THREE.OrbitControls( camera, renderer.domElement );
orbit.enableZoom = false;
var ambientLight = new THREE.AmbientLight( '#00FFFF' ),
hemiLight = new THREE.HemisphereLight('#D63AF9', '#2F1847', 0 ),
light = new THREE.PointLight( '#D63AF9', 1, 100 );
ambientLight.position.set( 0, 0, 0 );
hemiLight.position.set( 0, 0, 0 );
light.position.set( 0, 0, 10 );
scene.add( ambientLight );
scene.add( hemiLight );
scene.add( light );
var group = new THREE.Group();
// Box added to show the boundaries
// Box x, y and z positions indicate the centre, not the corner
var geometry = new THREE.BoxGeometry(50,50,50);
// geometry.center();
var material = new THREE.MeshToonMaterial({ color: 0xFFB4E0, opacity:0.6, transparent:true, wireframe:true, emissive: 0xFFB4E0,emissiveIntensity:0.01} );
var box = new THREE.Mesh(geometry, material);
box.position.x = 25;
box.position.y = 25;
box.position.z = 25;
group.add(box);
mover = new Mover();
mover.display();
mover.initialise();
scene.add( group );
var prevFog = true;
var wind = new THREE.Vector3(1,0,0);
var gravity = new THREE.Vector3(0,10,0);
var render = function () {
requestAnimationFrame( render );
mover.display();
mover.applyForce(wind);
mover.applyForce(gravity);
mover.update();
mover.checkEdges();
// group.rotation.x += 0.002;
// group.rotation.y += 0.002;
// group.rotation.z += 0.002;
renderer.render( scene, camera );
};
window.addEventListener( 'resize', function () {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}, false );
render();
function Mover() {
this.position = new THREE.Vector3();
this.velocity = new THREE.Vector3();
this.acceleration = new THREE.Vector3();
this.max = new THREE.Vector3(100,100,100);
this.min = new THREE.Vector3(-100,-100,-100);
this.mass = 10;
var geometry = new THREE.SphereGeometry(2,10,10);
var material = new THREE.MeshToonMaterial({ color: 0x624763, opacity:0.5, transparent:true, wireframe:true, emissive: 0x624763,emissiveIntensity:1} );
var sphere = new THREE.Mesh(geometry, material);
group.add(sphere);
this.initialise = function() {
this.position.x = 25;
this.position.y = 25;
this.position.z = 25;
this.velocity.x = 0.5;
this.velocity.y = 0.3;
this.velocity.z = 0.03;
this.acceleration.x = 0.01;
this.acceleration.y = 0.01;
this.acceleration.z = 0.001;
}
this.applyForce = function(force){
var f = force.divideScalar(this.mass);
this.acceleration.add(f);
}
this.update = function() {
this.velocity.add(this.acceleration);
this.velocity.clamp(this.min, this.max);
this.position.add(this.velocity);
this.acceleration.multiplyScalar(0);
}
this.display = function(){
sphere.position.x = this.position.x;
sphere.position.y = this.position.y;
sphere.position.z = this.position.z;
}
this.checkEdges = function() {
if (this.position.x > 50){
this.position.x = 50;
this.velocity.x *= -1;
}
else if (this.position.x < 0){
this.position.x = 0;
this.velocity.x *= -1;
}
if (this.position.y > 50){
this.position.y = 50;
this.velocity.y *= -1;
}
else if (this.position.y < 0){
this.position.y = 0;
this.velocity.y *= -1;
}
if (this.position.z > 50){
this.position.z = 50;
this.velocity.z *= -1;
}
else if (this.position.z < 0){
this.position.z = 0;
this.velocity.z *= -1;
}
}
}
</script>
</body>
</html>