<canvas class="webgl"></canvas>
<h1>
With Love
</h1>
<button id="play-music" type="button" aria-label="Play music"><svg fill="currentColor" viewBox="0 0 512 512" width="100" title="music">
<path d="M470.38 1.51L150.41 96A32 32 0 0 0 128 126.51v261.41A139 139 0 0 0 96 384c-53 0-96 28.66-96 64s43 64 96 64 96-28.66 96-64V214.32l256-75v184.61a138.4 138.4 0 0 0-32-3.93c-53 0-96 28.66-96 64s43 64 96 64 96-28.65 96-64V32a32 32 0 0 0-41.62-30.49z" />
</svg></button>
<script type="x-shader/x-vertex" id="vertexShader">
#define M_PI 3.1415926535897932384626433832795
uniform float uTime;
uniform float uSize;
attribute float aScale;
attribute vec3 aColor;
attribute float random;
attribute float random1;
attribute float aSpeed;
varying vec3 vColor;
varying vec2 vUv;
void main() {
float sign = 2.0* (step(random, 0.5) -.5);
float t = sign*mod(-uTime * aSpeed* 0.005 + 10.0*aSpeed*aSpeed, M_PI);
float a = pow(t, 2.0) * pow((t - sign * M_PI), 2.0);
float radius = 0.14;
vec3 myOffset =
vec3(t, 1.0, 0.0);
myOffset = vec3(radius *16.0 * pow(sin(t), 2.0) * sin(t), radius * (13.0 * cos(t) - 5.0 * cos(2.0 * t) - 2.0 * cos(3.0 * t) - cos(4.0 * t)), .15*(a*(random1 - .5))*sin(abs(10.0*(sin(.2*uTime + .2*random)))*t));
vec3 displacedPosition = myOffset;
vec4 modelPosition = modelMatrix * vec4(displacedPosition.xyz, 1.0);
vec4 viewPosition = viewMatrix * modelPosition;
viewPosition.xyz += position * aScale * uSize * pow(a, .5) * .5;
gl_Position = projectionMatrix * viewPosition;
vColor = aColor;
vUv = uv;
}
</script>
<script type="x-shader/x-fragment" id="fragmentShader">
varying vec3 vColor;
varying vec2 vUv;
void main() {
vec2 uv = vUv;
vec3 color = vColor;
float strength = distance(uv, vec2(0.5));
strength *= 2.0;
strength = 1.0 - strength;
gl_FragColor = vec4(strength * color, 1.0);
}
</script>
<script type="x-shader/x-vertex" id="vertexShader1">
#define M_PI 3.1415926535897932384626433832795
uniform float uTime;
uniform float uSize;
attribute float aScale;
attribute vec3 aColor;
attribute float phi;
attribute float random;
attribute float random1;
varying vec3 vColor;
varying vec2 vUv;
void main() {
float t = 0.01 * uTime + 12.0;
float angle = phi;
t = mod((-uTime + 100.0) * 0.06* random1 + random *2.0 * M_PI , 2.0 * M_PI);
vec3 myOffset = vec3(5.85*cos(angle * (t )), 2.0*(t - M_PI), 3.0*sin(angle * (t )/t));
vec4 modelPosition = modelMatrix * vec4(myOffset, 1.0);
vec4 viewPosition = viewMatrix * modelPosition;
viewPosition.xyz += position * aScale * uSize;
gl_Position = projectionMatrix * viewPosition;
vColor = aColor;
vUv = uv;
}
</script>
<script type="x-shader/x-fragment" id="fragmentShader1">
uniform sampler2D uTex;
varying vec3 vColor;
varying vec2 vUv;
void main() {
vec2 uv = vUv;
vec3 color = vColor;
float strength = distance(uv, vec2(0.5, .65));
strength *= 2.0;
strength = 1.0 - strength;
vec3 texture = texture2D(uTex, uv).rgb;
gl_FragColor = vec4(texture * color * (strength + .3), 1.);
}
</script>* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
overflow: hidden;
background: #16000a;
}
body {
-webkit-font-smoothing: antialiased;
color: #ffdada;
}
.webgl {
position: fixed;
width: 100vw;
height: 100vh;
top: 0;
left: 0;
outline: none;
}
body::before {
content: "";
position: absolute;
border: 8px solid;
inset: 1rem;
z-index: 100;
pointer-events: none;
}
h1 {
position: absolute;
top: 10vh;
left: 2.5rem;
right: 1rem;
text-align: center;
font-family: ador-hairline, sans-serif;
font-weight: 900;
font-size: max(1rem, 3vh);
}
button {
position: absolute;
left: 0;
top: 0;
bottom: 0;
height: 12vh;
width: 12vh;
transform: translateY(2vh);
right: 0;
margin: auto;
-webkit-appearance: none;
background: transparent;
color: inherit;
border: none;
cursor: pointer;
}
svg {
width: 3.5vh;
}
/* Poly Heart model by Quaternius [CC0] (https://creativecommons.org/publicdomain/zero/1.0/) via Poly Pizza (https://poly.pizza/m/1yCRUwFnwX)
*/
import * as THREE from "https://cdn.skypack.dev/[email protected]";
import { gsap } from "https://cdn.skypack.dev/[email protected]";
import { GLTFLoader } from "https://cdn.skypack.dev/[email protected]/examples/jsm/loaders/GLTFLoader";
class World {
constructor({
canvas,
width,
height,
cameraPosition,
fieldOfView = 75,
nearPlane = 0.1,
farPlane = 100
}) {
this.parameters = {
count: 1500,
max: 12.5 * Math.PI,
a: 2,
c: 4.5
};
this.textureLoader = new THREE.TextureLoader();
this.scene = new THREE.Scene();
this.scene.background = new THREE.Color(0x16000a);
this.clock = new THREE.Clock();
this.data = 0;
this.time = { current: 0, t0: 0, t1: 0, t: 0, frequency: 0.0005 };
this.angle = { x: 0, z: 0 };
this.width = width || window.innerWidth;
this.height = height || window.innerHeight;
this.aspectRatio = this.width / this.height;
this.fieldOfView = fieldOfView;
this.camera = new THREE.PerspectiveCamera(
fieldOfView,
this.aspectRatio,
nearPlane,
farPlane
);
this.camera.position.set(
cameraPosition.x,
cameraPosition.y,
cameraPosition.z
);
this.scene.add(this.camera);
this.renderer = new THREE.WebGLRenderer({
canvas,
antialias: true
});
this.pixelRatio = Math.min(window.devicePixelRatio, 2);
this.renderer.setPixelRatio(this.pixelRatio);
this.renderer.setSize(this.width, this.height);
this.timer = 0;
this.addToScene();
this.addButton();
this.render();
this.listenToResize();
this.listenToMouseMove();
}
start() {}
render() {
this.renderer.render(this.scene, this.camera);
this.composer && this.composer.render();
}
loop() {
this.time.elapsed = this.clock.getElapsedTime();
this.time.delta = Math.min(
60,
(this.time.current - this.time.elapsed) * 1000
);
if (this.analyser && this.isRunning) {
this.time.t = this.time.elapsed - this.time.t0 + this.time.t1;
this.data = this.analyser.getAverageFrequency();
this.data *= this.data / 2000;
this.angle.x += this.time.delta * 0.001 * 0.63;
this.angle.z += this.time.delta * 0.001 * 0.39;
const justFinished = this.isRunning && !this.sound.isPlaying;
if (justFinished) {
this.time.t1 = this.time.t;
this.audioBtn.disabled = false;
this.isRunning = false;
const tl = gsap.timeline();
this.angle.x = 0;
this.angle.z = 0;
tl.to(this.camera.position, {
x: 0,
z: 4.5,
duration: 4,
ease: "expo.in"
});
tl.to(this.audioBtn, {
opacity: () => 1,
duration: 1,
ease: "power1.out"
});
} else {
this.camera.position.x = Math.sin(this.angle.x) * this.parameters.a;
this.camera.position.z = Math.min(
Math.max(Math.cos(this.angle.z) * this.parameters.c, 1.75),
6.5
);
}
}
this.camera.lookAt(this.scene.position);
if (this.heartMaterial) {
this.heartMaterial.uniforms.uTime.value +=
this.time.delta * this.time.frequency * (1 + this.data * 0.2);
}
if (this.model) {
this.model.rotation.y -= 0.0005 * this.time.delta * (1 + this.data);
}
if (this.snowMaterial) {
this.snowMaterial.uniforms.uTime.value +=
this.time.delta * 0.0004 * (1 + this.data);
}
this.render();
this.time.current = this.time.elapsed;
requestAnimationFrame(this.loop.bind(this));
}
listenToResize() {
window.addEventListener("resize", () => {
// Update sizes
this.width = window.innerWidth;
this.height = window.innerHeight;
// Update camera
this.camera.aspect = this.width / this.height;
this.camera.updateProjectionMatrix();
this.renderer.setSize(this.width, this.height);
});
}
listenToMouseMove() {
window.addEventListener("mousemove", (e) => {
const x = e.clientX;
const y = e.clientY;
gsap.to(this.camera.position, {
x: gsap.utils.mapRange(0, window.innerWidth, 0.2, -0.2, x),
y: gsap.utils.mapRange(0, window.innerHeight, 0.2, -0.2, -y)
});
});
}
addHeart() {
this.heartMaterial = new THREE.ShaderMaterial({
fragmentShader: document.getElementById("fragmentShader").textContent,
vertexShader: document.getElementById("vertexShader").textContent,
uniforms: {
uTime: { value: 0 },
uSize: { value: 0.2 },
uTex: {
value: new THREE.TextureLoader().load(
"https://assets.codepen.io/74321/heart.png"
)
}
},
depthWrite: false,
blending: THREE.AdditiveBlending,
transparent: true
});
const count = this.parameters.count; //2000
const scales = new Float32Array(count * 1);
const colors = new Float32Array(count * 3);
const speeds = new Float32Array(count);
const randoms = new Float32Array(count);
const randoms1 = new Float32Array(count);
const colorChoices = [
"white",
"red",
"pink",
"crimson",
"hotpink",
"green"
];
const squareGeometry = new THREE.PlaneGeometry(1, 1);
this.instancedGeometry = new THREE.InstancedBufferGeometry();
Object.keys(squareGeometry.attributes).forEach((attr) => {
this.instancedGeometry.attributes[attr] = squareGeometry.attributes[attr];
});
this.instancedGeometry.index = squareGeometry.index;
this.instancedGeometry.maxInstancedCount = count;
for (let i = 0; i < count; i++) {
const phi = Math.random() * Math.PI * 2;
const i3 = 3 * i;
randoms[i] = Math.random();
randoms1[i] = Math.random();
scales[i] = Math.random() * 0.35;
const colorIndex = Math.floor(Math.random() * colorChoices.length);
const color = new THREE.Color(colorChoices[colorIndex]);
colors[i3 + 0] = color.r;
colors[i3 + 1] = color.g;
colors[i3 + 2] = color.b;
speeds[i] = Math.random() * this.parameters.max;
}
this.instancedGeometry.setAttribute(
"random",
new THREE.InstancedBufferAttribute(randoms, 1, false)
);
this.instancedGeometry.setAttribute(
"random1",
new THREE.InstancedBufferAttribute(randoms1, 1, false)
);
this.instancedGeometry.setAttribute(
"aScale",
new THREE.InstancedBufferAttribute(scales, 1, false)
);
this.instancedGeometry.setAttribute(
"aSpeed",
new THREE.InstancedBufferAttribute(speeds, 1, false)
);
this.instancedGeometry.setAttribute(
"aColor",
new THREE.InstancedBufferAttribute(colors, 3, false)
);
this.heart = new THREE.Mesh(this.instancedGeometry, this.heartMaterial);
console.log(this.heart);
this.scene.add(this.heart);
}
addToScene() {
this.addModel();
this.addHeart();
this.addSnow();
}
async addModel() {
this.model = await this.loadObj(
"https://assets.codepen.io/74321/heart.glb"
);
this.model.scale.set(0.01, 0.01, 0.01);
this.model.material = new THREE.MeshMatcapMaterial({
matcap: this.textureLoader.load(
"https://assets.codepen.io/74321/3.png",
() => {
gsap.to(this.model.scale, {
x: 0.35,
y: 0.35,
z: 0.35,
duration: 1.5,
ease: "Elastic.easeOut"
});
}
),
color: "#ff89aC"
});
this.scene.add(this.model);
}
addButton() {
this.audioBtn = document.querySelector("button");
this.audioBtn.addEventListener("click", () => {
this.audioBtn.disabled = true;
if (this.analyser) {
this.sound.play();
this.time.t0 = this.time.elapsed;
this.data = 0;
this.isRunning = true;
gsap.to(this.audioBtn, {
opacity: 0,
duration: 1,
ease: "power1.out"
});
} else {
this.loadMusic().then(() => {
console.log("music loaded");
});
}
});
}
loadObj(path) {
const loader = new GLTFLoader();
return new Promise((resolve) => {
loader.load(
path,
(response) => {
resolve(response.scene.children[0]);
},
(xhr) => {},
(err) => {
console.log(err);
}
);
});
}
loadMusic() {
return new Promise((resolve) => {
const listener = new THREE.AudioListener();
this.camera.add(listener);
// create a global audio source
this.sound = new THREE.Audio(listener);
const audioLoader = new THREE.AudioLoader();
audioLoader.load(
"https://assets.codepen.io/74321/ukulele.mp3",
(buffer) => {
this.sound.setBuffer(buffer);
this.sound.setLoop(false);
this.sound.setVolume(0.5);
this.sound.play();
this.analyser = new THREE.AudioAnalyser(this.sound, 32);
// get the average frequency of the sound
const data = this.analyser.getAverageFrequency();
this.isRunning = true;
this.t0 = this.time.elapsed;
resolve(data);
},
(progress) => {
gsap.to(this.audioBtn, {
opacity: () => 1 - progress.loaded / progress.total,
duration: 1,
ease: "power1.out"
});
},
(error) => {
console.log(error);
}
);
});
}
addSnow() {
this.snowMaterial = new THREE.ShaderMaterial({
fragmentShader: document.getElementById("fragmentShader1").textContent,
vertexShader: document.getElementById("vertexShader1").textContent,
uniforms: {
uTime: { value: 0 },
uSize: { value: 0.3 },
uTex: {
value: new THREE.TextureLoader().load(
"https://assets.codepen.io/74321/heart.png"
)
}
},
depthWrite: false,
blending: THREE.AdditiveBlending,
transparent: true
});
const count = 550;
const scales = new Float32Array(count * 1);
const colors = new Float32Array(count * 3);
const phis = new Float32Array(count);
const randoms = new Float32Array(count);
const randoms1 = new Float32Array(count);
const colorChoices = ["red", "pink", "hotpink", "green"];
const squareGeometry = new THREE.PlaneGeometry(1, 1);
this.instancedGeometry = new THREE.InstancedBufferGeometry();
Object.keys(squareGeometry.attributes).forEach((attr) => {
this.instancedGeometry.attributes[attr] = squareGeometry.attributes[attr];
});
this.instancedGeometry.index = squareGeometry.index;
this.instancedGeometry.maxInstancedCount = count;
for (let i = 0; i < count; i++) {
const phi = (Math.random() - 0.5) * 10;
const i3 = 3 * i;
phis[i] = phi;
randoms[i] = Math.random();
randoms1[i] = Math.random();
scales[i] = Math.random() * 0.35;
const colorIndex = Math.floor(Math.random() * colorChoices.length);
const color = new THREE.Color(colorChoices[colorIndex]);
colors[i3 + 0] = color.r;
colors[i3 + 1] = color.g;
colors[i3 + 2] = color.b;
}
this.instancedGeometry.setAttribute(
"phi",
new THREE.InstancedBufferAttribute(phis, 1, false)
);
this.instancedGeometry.setAttribute(
"random",
new THREE.InstancedBufferAttribute(randoms, 1, false)
);
this.instancedGeometry.setAttribute(
"random1",
new THREE.InstancedBufferAttribute(randoms1, 1, false)
);
this.instancedGeometry.setAttribute(
"aScale",
new THREE.InstancedBufferAttribute(scales, 1, false)
);
this.instancedGeometry.setAttribute(
"aColor",
new THREE.InstancedBufferAttribute(colors, 3, false)
);
this.snow = new THREE.Mesh(this.instancedGeometry, this.snowMaterial);
this.scene.add(this.snow);
}
}
const world = new World({
canvas: document.querySelector("canvas.webgl"),
cameraPosition: { x: 0, y: 0, z: 4.5 }
});
world.loop();
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