紙吹雪を爆発させようとしていますが、紙吹雪の投影に問題があります。私のアイデアは、すべての方向 (1 秒) に外側に向かって高速で爆発し、紙吹雪が地面に浮くというものです。展開できないので、計算が間違っていると思います。
three.js コードを使用して、いくつかの mod を作成しました。
http://givememypatientinfo.com/ParticleBlocksConfetti.html
どんな提案でも大歓迎です。私は three.js の初心者ですが、ライブラリが大好きです!
コード：
var container, stats;
var camera, controls, scene, projector, renderer;
var objects = [], plane;
var vel = 1;
var vel2 = 0.01;
var accel = .3;
var accel2 = -.9;
var force = 1;
var frame = 0;
var mouse = new THREE.Vector2(),
offset = new THREE.Vector3(),
INTERSECTED, SELECTED;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 1000;
/*//controls = new THREE.TrackballControls( camera );
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;*/
scene = new THREE.Scene();
scene.add( new THREE.AmbientLight( 0x505050 ) );
var light = new THREE.SpotLight( 0xffffff, 1.5 );
light.position.set( 0, 500, 2000 );
light.castShadow = true;
light.shadowCameraNear = 200;
light.shadowCameraFar = camera.far;
light.shadowCameraFov = 50;
light.shadowBias = -0.00022;
light.shadowDarkness = 0.5;
light.shadowMapWidth = 2048;
light.shadowMapHeight = 2048;
scene.add( light );
var geometry = new THREE.CubeGeometry( 40, 40, 40 );
//make confetti for particle system
for ( var i = 0; i < 100; i ++ ) {
var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } ) );
//object.material.ambient = object.material.color;
/*object.position.x = Math.random() * 500 - 100;
object.position.y = Math.random() * 500 - 100;
object.position.z = 300;*/
object.position.x = Math.random() * 100 - 100;
object.position.y = Math.random() * 100 - 100;
object.position.z = 300;
object.rotation.x = Math.random() * 2 * Math.PI;
object.rotation.y = Math.random() * 2 * Math.PI;
object.rotation.z = Math.random() * 2 * Math.PI;
object.scale.x = .1;
object.scale.y = Math.random() * .8 + .1;
object.scale.z = Math.random() * .5 + .1;
object.castShadow = false;
object.receiveShadow = true;
scene.add( object );
objects.push( object );
}
plane = new THREE.Mesh( new THREE.PlaneGeometry( 2000, 2000, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.25, transparent: true, wireframe: true } ) );
plane.visible = false;
scene.add( plane );
projector = new THREE.Projector();
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.sortObjects = false;
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.shadowMapEnabled = true;
renderer.shadowMapType = THREE.PCFShadowMap;
container.appendChild( renderer.domElement );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = '<a href="http://threejs.org" target="_blank">three.js</a> webgl - draggable cubes';
container.appendChild( info );
}
function animate_particles(frame) {
//will update each particle
if (frame < 50){
var pCount = objects.length-1;
if (frame < 40){
vel += accel*2;
}else {
vel = vel + accel2;
}
while(pCount > -1) {
if (frame < 30){
objects[pCount].position.y += vel;
}else{
objects[pCount].position.y -= vel;
}
//objects[pCount].rotation.x += Math.random()*.7;
//objects[pCount].rotation.z += Math.random()*.01;
//objects[pCount].rotation.y += Math.random()*.01;
pCount--;
}
}
}
function animate() {
requestAnimationFrame( animate );
animate_particles(frame);
render();
//stats.update();
}
function render() {
renderer.render( scene, camera );
frame++;
}
</script>