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webgl_custom_attributes_points.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Verge3D webgl - custom attributes [particles]</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
</head>
<body>
<div id="info"><a href="https://www.soft8soft.com/verge3d" target="_blank" rel="noopener">Verge3D</a> - custom attributes example - particles</div>
<div id="container"></div>
<script type="x-shader/x-vertex" id="vertexshader">
attribute float size;
attribute vec3 customColor;
varying vec3 vColor;
void main() {
vColor = customColor;
vec4 mvPosition = modelViewMatrix * vec4(position, 1.0);
gl_PointSize = size * (300.0 / -mvPosition.z);
gl_Position = projectionMatrix * mvPosition;
}
</script>
<script type="x-shader/x-fragment" id="fragmentshader">
uniform vec3 color;
uniform sampler2D pointTexture;
varying vec3 vColor;
void main() {
gl_FragColor = vec4(color * vColor, 1.0);
gl_FragColor = gl_FragColor * texture2D(pointTexture, gl_PointCoord);
}
</script>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"v3d": "../build/v3d.module.js",
"v3d/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as v3d from 'v3d';
import Stats from 'v3d/addons/libs/stats.module.js';
let renderer, scene, camera, stats;
let sphere;
const WIDTH = window.innerWidth;
const HEIGHT = window.innerHeight;
init();
animate();
function init() {
camera = new v3d.PerspectiveCamera(40, WIDTH / HEIGHT, 1, 10000);
camera.position.z = 300;
scene = new v3d.Scene();
const amount = 100000;
const radius = 200;
const positions = new Float32Array(amount * 3);
const colors = new Float32Array(amount * 3);
const sizes = new Float32Array(amount);
const vertex = new v3d.Vector3();
const color = new v3d.Color(0xffffff);
for (let i = 0; i < amount; i++) {
vertex.x = (Math.random() * 2 - 1) * radius;
vertex.y = (Math.random() * 2 - 1) * radius;
vertex.z = (Math.random() * 2 - 1) * radius;
vertex.toArray(positions, i * 3);
if (vertex.x < 0) {
color.setHSL(0.5 + 0.1 * (i / amount), 0.7, 0.5);
} else {
color.setHSL(0.0 + 0.1 * (i / amount), 0.9, 0.5);
}
color.toArray(colors, i * 3);
sizes[i] = 10;
}
const geometry = new v3d.BufferGeometry();
geometry.setAttribute('position', new v3d.BufferAttribute(positions, 3));
geometry.setAttribute('customColor', new v3d.BufferAttribute(colors, 3));
geometry.setAttribute('size', new v3d.BufferAttribute(sizes, 1));
//
const material = new v3d.ShaderMaterial({
uniforms: {
color: { value: new v3d.Color(0xffffff) },
pointTexture: { value: new v3d.TextureLoader().load('textures/sprites/spark1.png') }
},
vertexShader: document.getElementById('vertexshader').textContent,
fragmentShader: document.getElementById('fragmentshader').textContent,
blending: v3d.AdditiveBlending,
depthTest: false,
transparent: true
});
//
sphere = new v3d.Points(geometry, material);
scene.add(sphere);
//
renderer = new v3d.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(WIDTH, HEIGHT);
const container = document.getElementById('container');
container.appendChild(renderer.domElement);
stats = new Stats();
container.appendChild(stats.dom);
//
window.addEventListener('resize', onWindowResize);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
requestAnimationFrame(animate);
render();
stats.update();
}
function render() {
const time = Date.now() * 0.005;
sphere.rotation.z = 0.01 * time;
const geometry = sphere.geometry;
const attributes = geometry.attributes;
for (let i = 0; i < attributes.size.array.length; i++) {
attributes.size.array[i] = 14 + 13 * Math.sin(0.1 * i + time);
}
attributes.size.needsUpdate = true;
renderer.render(scene, camera);
}
</script>
</body>
</html>