I am looking to make some changes to this demo:
Instead of having colored particles, I want to assign an image to each one. Should I use a cube for this purpose? Or is there a way to use an image with Vector3?
Here is the code for the example:
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var container, stats;
var camera, scene, renderer, particles, geometry, materials = [], parameters, i, h, color;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 3000 );
camera.position.z = 1000;
scene = new THREE.Scene();
scene.fog = new THREE.FogExp2( 0x000000, 0.0007 );
geometry = new THREE.Geometry();
for ( i = 0; i < 20000; i ++ ) {
var vertex = new THREE.Vector3();
vertex.x = Math.random() * 2000 - 1000;
vertex.y = Math.random() * 2000 - 1000;
vertex.z = Math.random() * 2000 - 1000;
geometry.vertices.push( vertex );
}
parameters = [
[ [1, 1, 0.5], 5 ],
[ [0.95, 1, 0.5], 4 ],
[ [0.90, 1, 0.5], 3 ],
[ [0.85, 1, 0.5], 2 ],
[ [0.80, 1, 0.5], 1 ]
];
for ( i = 0; i < parameters.length; i ++ ) {
color = parameters[i][0];
size = parameters[i][1];
materials[i] = new THREE.PointCloudMaterial( { size: size } );
particles = new THREE.PointCloud( geometry, materials[i] );
particles.rotation.x = Math.random() * 6;
particles.rotation.y = Math.random() * 6;
particles.rotation.z = Math.random() * 6;
scene.add( particles );
}
renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
}
function onDocumentTouchStart( event ) {
if ( event.touches.length === 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
}
function onDocumentTouchMove( event ) {
if ( event.touches.length === 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
var time = Date.now() * 0.00005;
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
camera.lookAt( scene.position );
for ( i = 0; i < scene.children.length; i ++ ) {
var object = scene.children[ i ];
if ( object instanceof THREE.PointCloud ) {
object.rotation.y = time * ( i < 4 ? i + 1 : - ( i + 1 ) );
}
}
for ( i = 0; i < materials.length; i ++ ) {
color = parameters[i][0];
h = ( 360 * ( color[0] + time ) % 360 ) / 360;
materials[i].color.setHSL( h, color[1], color[2] );
}
renderer.render( scene, camera );
}
Thank you in advance for any assistance.
PS. I am new to working with three.js, so any guidance would be greatly appreciated.