Photo Tear

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</head>
<body>
<canvas class="webgl"></canvas>
<div class="info">
    <svg id="hand" viewBox="0 0 175 200" fill="none" xmlns="http://www.w3.org/2000/svg">
        <path d="M173.272 82.5157C161.668 70.5528 146.803 62.2655 130.526 58.6846C118.575 55.6811 106.321 54.0528 94.0011 53.8313V20.8535C93.8062 15.2638 91.4057 9.97869 87.3246 6.15411C83.2435 2.32953 77.8139 0.276704 72.2233 0.444604C66.6327 0.276704 61.2031 2.32953 57.122 6.15411C53.0409 9.97869 50.6404 15.2638 50.4455 20.8535V83.0757L40.49 73.2446C36.1045 68.9428 30.2064 66.5329 24.0633 66.5329C17.9201 66.5329 12.0221 68.9428 7.63662 73.2446C5.43939 75.3674 3.69046 77.9095 2.49342 80.7204C1.29638 83.5313 0.675563 86.5539 0.667733 89.609C0.553645 95.5326 2.79095 101.26 6.88996 105.538L35.8855 139.885C37.2844 148.66 40.3015 157.1 44.7833 164.773C48.0577 170.674 52.2595 176.011 57.2277 180.578V192.525C57.2082 194.228 57.8424 195.874 58.9999 197.124C60.1573 198.374 61.75 199.133 63.45 199.245H150.001C151.701 199.133 153.294 198.374 154.451 197.124C155.609 195.874 156.243 194.228 156.223 192.525V175.725C168.45 161.166 175.07 142.717 174.89 123.707V86.3735C174.812 84.9394 174.24 83.5764 173.272 82.5157V82.5157ZM162.445 124.018C162.843 140.561 157.077 156.662 146.268 169.191C144.894 170.31 144.003 171.914 143.779 173.671V187.111H69.9833V177.902C69.9848 176.883 69.736 175.879 69.2586 174.979C68.7812 174.078 68.0899 173.309 67.2455 172.738C62.5824 168.915 58.732 164.197 55.9211 158.862C51.9575 152.15 49.416 144.695 48.4544 136.96C48.3876 135.614 47.8854 134.325 47.0233 133.289L16.41 97.0757C15.4129 96.0917 14.6212 94.9195 14.0808 93.627C13.5405 92.3346 13.2622 90.9477 13.2622 89.5468C13.2622 88.146 13.5405 86.7591 14.0808 85.4666C14.6212 84.1742 15.4129 83.0019 16.41 82.0179C18.4587 80.0002 21.2189 78.8691 24.0944 78.8691C26.9699 78.8691 29.7301 80.0002 31.7788 82.0179L50.4455 100.685V120.222L62.89 114V20.8535C63.1113 18.5757 64.2079 16.4726 65.9487 14.987C67.6896 13.5015 69.939 12.7494 72.2233 12.889C74.5076 12.7494 76.7569 13.5015 78.4978 14.987C80.2387 16.4726 81.3353 18.5757 81.5566 20.8535V94.2757L94.0011 96.9513V66.3379C99.2229 66.4409 104.436 66.8148 109.619 67.4579V100L119.574 102.178V68.889C122.126 69.3868 124.739 69.9468 127.414 70.6313C130.64 71.4754 133.818 72.4932 136.934 73.6802V105.725L146.89 107.902V78.2224C152.546 81.0774 157.781 84.6997 162.445 88.9868V124.018Z" fill="white"/>
    </svg>
</div>
  <script type="module" src="./script.js"></script>

</body>
</html>

CSS

JS

console.clear();

import * as THREE from 'https://cdn.skypack.dev/three@0.125.0';
import gsap from "https://cdn.skypack.dev/gsap@3.5.1";

const BackgroundGradient = (colorA, colorB) => {
  var mesh = new THREE.Mesh(
  new THREE.PlaneBufferGeometry(2, 2, 1, 1),
  new THREE.ShaderMaterial({
    uniforms: {
      uColorA: { value: new THREE.Color(colorA) },
      uColorB: { value: new THREE.Color(colorB) } },

vertexShader: `
            varying vec2 vUv;
            void main(){
                vUv = uv;
                float depth = -1.; //or maybe 1. you can experiment
                gl_Position = vec4(position.xy, depth, 1.);
            }
          `,
    fragmentShader:
    `
            varying vec2 vUv;
            uniform vec3 uColorA;
            uniform vec3 uColorB;
            void main(){
                gl_FragColor = vec4(
                    mix( uColorA, uColorB, vec3(vUv.y)),
                    1.
                );
            }
          ` }));

mesh.material.depthWrite = false;
  mesh.renderOrder = -99999;
  return mesh;
};

class Stage
{
  constructor(domCanvasElement, topColor, bottomColor)
  {
    this.canvas = domCanvasElement;
    this.scene = new THREE.Scene();

this.sizes = {
      width: 0,
      height: 0 };

/**
     * Background Gradient
     */

this.background = BackgroundGradient(bottomColor, topColor);
    this.scene.add(this.background);

/**
     * Camera
     */

this.camera = new THREE.PerspectiveCamera(30, this.sizes.width / this.sizes.height, 0.1, 100);
    this.camera.position.set(0, 0, 6);
    this.scene.add(this.camera);

/**
     * Camera Group
     */

this.cameraGroup = new THREE.Group();

this.scene.add(this.cameraGroup);

/**
     * Renderer
     */
    const renderer = new THREE.WebGLRenderer({
      canvas: this.canvas,
      antialias: window.devicePixelRatio === 1 ? true : false });

renderer.physicallyCorrectLights = true;
    renderer.outputEncoding = THREE.sRGBEncoding;
    renderer.toneMapping = THREE.ACESFilmicToneMapping;
    renderer.toneMappingExposure = 1;

this.renderer = renderer;

window.addEventListener('resize', () => {this.onResize();});

this.onResize();

}

onResize()
  {
    // Update sizes
    this.sizes.width = window.innerWidth;
    this.sizes.height = window.innerHeight;

if (this.sizes.width < 800) this.camera.position.z = 10;else
    this.camera.position.z = 6;

// Update camera
    this.camera.aspect = this.sizes.width / this.sizes.height;
    this.camera.updateProjectionMatrix();

// Update renderer
    this.renderer.setSize(this.sizes.width, this.sizes.height);
    this.renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
  }

add(item)
  {
    this.scene.add(item);
  }

cameraAdd(item)
  {
    this.cameraGroup.add(item);
  }

render(elapsedTime)
  {
    this.cameraGroup.position.copy(this.camera.position);
    this.cameraGroup.rotation.copy(this.camera.rotation);
    this.renderer.render(this.scene, this.camera);
  }}

class Loader
{
  constructor(color = 'black', shadow = "white", size = 1)
  {
    this.mesh = new THREE.Mesh(
    new THREE.PlaneBufferGeometry(2, 2, 1, 1),
    new THREE.ShaderMaterial({
      uniforms: {
        uColor: { value: new THREE.Color(color) },
        uColorShadow: { value: new THREE.Color(shadow) },
        uProgress: { value: 0 },
        uAlpha: { value: 1 },
        uNoiseSize: { value: size } },

vertexShader: `
        
                
                void main(){
             
                    gl_Position = vec4(position.xy, 0.5, 1.);
                }
                `,
      fragmentShader: `

uniform vec3 uColor;
                uniform float uAlpha;
            
                void main () {
                    gl_FragColor = vec4(uColor, uAlpha);
                }
            `,
      transparent: true,
      depthTest: false }));

}

get progress()
  {
    return this.mesh.material.uniforms.uProgress.value;
  }

set progress(newValue)
  {
    this.mesh.material.uniforms.uProgress.value = newValue;
  }

get alpha()
  {
    return this.mesh.material.uniforms.uAlpha.value;
  }

set alpha(newValue)
  {
    this.mesh.material.uniforms.uAlpha.value = newValue;
  }

get noiseSize()
  {
    return this.mesh.material.uniforms.uNoiseSize.value;
  }

set noiseSize(newValue)
  {
    this.mesh.material.uniforms.uNoiseSize.value = newValue;
  }}

const ripVertexShader = `
	uniform float uTearAmount;
	uniform float uTearWidth;
	uniform float uTearXAngle;
	uniform float uTearYAngle;
	uniform float uTearZAngle;
	uniform float uTearXOffset;
	uniform float uXDirection;
	uniform float uRipSide;
	uniform float uRipSeed;

varying vec2 vUv;
	varying float vAmount;

mat4 rotationX( in float angle ) {
		return mat4(	1.0,		0,			0,			0,
						0, 	cos(angle),	-sin(angle),		0,
						0, 	sin(angle),	 cos(angle),		0,
						0, 			0,			  0, 		1);
	}

mat4 rotationY( in float angle ) {
		return mat4(	cos(angle),		0,		sin(angle),	0,
								0,		1.0,			 0,	0,
						-sin(angle),	0,		cos(angle),	0,
								0, 		0,				0,	1);
	}

mat4 rotationZ( in float angle ) {
		return mat4(	cos(angle),		-sin(angle),	0,	0,
						sin(angle),		cos(angle),		0,	0,
								0,				0,		1,	0,
								0,				0,		0,	1);
	}

void main(){

float ripAmount = 0.0;
		float yAmount = max(0.0, (uTearAmount - (1.0 - uv.y)));
		float zRotate = uTearZAngle * yAmount;
		float xRotate = uTearXAngle * yAmount;
		float yRotate = uTearYAngle * yAmount;
		vec3 rotation = vec3(xRotate* yAmount, yRotate* yAmount, zRotate* yAmount);

float halfHeight = float(HEIGHT) * 0.5;
		float halfWidth = (float(WIDTH) - uTearWidth * 0.5) * 0.5;

vec4 vertex = vec4(position.x + (halfWidth * uXDirection) - halfWidth, position.y + halfHeight, position.z, 1.0);

vertex = vertex * rotationY(rotation.y ) * rotationX(rotation.x  ) * rotationZ(rotation.z  );
		vertex.x += uTearXOffset * yAmount + ripAmount + halfWidth ;
		vertex.y -= halfHeight;

vec4 modelPosition = modelMatrix * vertex;
		vec4 viewPosition = viewMatrix * modelPosition;
		vec4 projectedPosition = projectionMatrix * viewPosition;

gl_Position = projectedPosition;

vUv = uv;
		vAmount = yAmount;
	}
`;

const ripFragmentShader = `
	uniform sampler2D uMap;
	uniform sampler2D uRip;
	uniform sampler2D uBorder;

uniform vec3 uShadeColor;
	uniform float uUvOffset;
	uniform float uRipSide;
	uniform float uTearXAngle;
	uniform float uShadeAmount;
	uniform float uTearWidth;
	uniform float uWhiteThreshold;
	uniform float uTearOffset;

varying vec2 vUv;
	varying float vAmount;

void main () {

bool rightSide = uRipSide == 1.0;
		float ripAmount = -1.0;
		float width = float(WIDTH);
		float widthOverlap = (uTearWidth * 0.5) + width;

bool frontSheet = uTearXAngle > 0.0;

float xScale = widthOverlap / float(FULL_WIDTH);
		vec2 uvOffset = vec2(vUv.x * xScale + uUvOffset, vUv.y);
		vec4 textureColor = texture2D(uMap, uvOffset);
		vec4 borderColor = texture2D(uBorder, uvOffset);
		if(borderColor.r > 0.0) textureColor = vec4(vec3(0.95), 1.0);

float ripRange = uTearWidth / widthOverlap;
		float ripStart = rightSide ? 0.0 : 1.0 - ripRange;

float alpha = 1.0;

float ripX = (vUv.x - ripStart) / ripRange;
		float ripY = vUv.y * 0.5 + (0.5 * uTearOffset);
		vec4 ripCut = texture2D(uRip, vec2(ripX, ripY));
		vec4 ripColor = texture2D(uRip, vec2(ripX * 0.9, ripY - 0.02));

float whiteness = dot(vec4(1.0), ripCut) / 4.0;

if (!rightSide && whiteness <= uWhiteThreshold)
		{
			whiteness = dot(vec4(1.0), ripColor) / 4.0;
			if(whiteness >= uWhiteThreshold) textureColor = ripColor;
			else alpha = 0.0;
		} 
		if (rightSide && whiteness >= uWhiteThreshold) alpha = 0.0;

gl_FragColor = mix(vec4(textureColor.rgb, alpha), vec4(uShadeColor, alpha), vAmount * uShadeAmount);
	}
`;

class Photo
{
  constructor(textures, destoryCallback)
  {
    this.destroyCallback = destoryCallback;
    this.photoTexture = textures.photo;
    this.borderTexture = textures.border;
    this.ripTexture = textures.rip;
    this.interactive = false;

this.group = new THREE.Group();
    this.group.rotation.z = (Math.random() * 2 - 1) * Math.PI;
    this.group.position.y = 10;

setTimeout(() => {
      this.interactive = true;
    }, 400);

const introAnimation = gsap.timeline({
      delay: 0.3,
      defaults: {
        duration: 0.8,
        ease: 'power3.out' } });

introAnimation.to(this.group.rotation, { z: 0 }, 0);
    introAnimation.to(this.group.position, { y: 0 }, 0);

const width = 3;
    const tearWidth = 0.4;

this.sheetSettings = {
      widthSegments: 30,
      heightSegments: 50,
      tearOffset: Math.random(),
      width: width,
      height: 2,
      tearAmount: 0,
      tearWidth: tearWidth,
      ripWhiteThreshold: 0.7,
      left: {
        uvOffset: 0,
        ripSide: 0,
        tearXAngle: -0.01,
        tearYAngle: -0.1,
        tearZAngle: 0.05,
        tearXOffset: 0,
        direction: -1,
        shadeColor: new THREE.Color('white'),
        shadeAmount: 0.2 },

right: {
        uvOffset: (width - tearWidth) / width * 0.5,
        ripSide: 1,
        tearXAngle: 0.2,
        tearYAngle: 0.1,
        tearZAngle: -0.1,
        tearXOffset: 0,
        direction: 1,
        shadeColor: new THREE.Color('black'),
        shadeAmount: 0.4 } };

this.sides = [
    {
      id: 'left',
      mesh: null,
      material: null },

{
      id: 'right',
      mesh: null,
      material: null }];

this.sheetPlane = new THREE.PlaneBufferGeometry(this.sheetSettings.width / 2 + this.sheetSettings.tearWidth / 2, this.sheetSettings.height, this.sheetSettings.widthSegments, this.sheetSettings.heightSegments);

this.sides.forEach((side) =>
    {
      side.material = this.getRipMaterial(side.id);
      side.mesh = new THREE.Mesh(this.sheetPlane, side.material);

if (this.sheetSettings[side.id].tearXAngle > 0)
      {
        side.mesh.position.z += 0.0001;
      }
      this.group.add(side.mesh);
    });

}

getRipMaterial(side)
  {
    const material = new THREE.ShaderMaterial({
      defines: {
        HEIGHT: this.sheetSettings.height,
        WIDTH: this.sheetSettings.width / 2,
        FULL_WIDTH: this.sheetSettings.width,
        HEIGHT_SEGMENTS: this.sheetSettings.heightSegments,
        WIDTH_SEGMENTS: this.sheetSettings.widthSegments },

uniforms: {
        uMap: { value: this.photoTexture },
        uRip: { value: this.ripTexture },
        uBorder: { value: this.borderTexture },
        uRipSide: { value: this.sheetSettings[side].ripSide },
        uTearWidth: { value: this.sheetSettings.tearWidth },
        uWhiteThreshold: { value: this.sheetSettings.ripWhiteThreshold },
        uTearAmount: { value: this.sheetSettings.tearAmount },
        uTearOffset: { value: this.sheetSettings.tearOffset },
        uUvOffset: { value: this.sheetSettings[side].uvOffset },
        uTearXAngle: { value: this.sheetSettings[side].tearXAngle },
        uTearYAngle: { value: this.sheetSettings[side].tearYAngle },
        uTearZAngle: { value: this.sheetSettings[side].tearZAngle },
        uTearXOffset: { value: this.sheetSettings[side].tearXOffset },
        uXDirection: { value: this.sheetSettings[side].direction },
        uShadeColor: { value: this.sheetSettings[side].shadeColor },
        uShadeAmount: { value: this.sheetSettings[side].shadeAmount } },

transparent: true,
      vertexShader: ripVertexShader,
      fragmentShader: ripFragmentShader });

return material;
  }

shouldCompleteRip()
  {
    return this.sheetSettings.tearAmount >= 1.5;
  }

updateUniforms()
  {
    if (this.interactive && this.shouldCompleteRip())
    {
      this.remove();
    } else

{
      if (this.sheetSettings.tearAmount === 0) this.sheetSettings.tearOffset = Math.random();
      this.sides.forEach((side) =>
      {
        const uniforms = side.mesh.material.uniforms;

uniforms.uTearAmount.value = this.sheetSettings.tearAmount;
        uniforms.uTearOffset.value = this.sheetSettings.tearOffset;
        uniforms.uUvOffset.value = this.sheetSettings[side.id].uvOffset;
        uniforms.uTearXAngle.value = this.sheetSettings[side.id].tearXAngle;
        uniforms.uTearYAngle.value = this.sheetSettings[side.id].tearYAngle;
        uniforms.uTearZAngle.value = this.sheetSettings[side.id].tearZAngle;
        uniforms.uTearXOffset.value = this.sheetSettings[side.id].tearXOffset;
        uniforms.uXDirection.value = this.sheetSettings[side.id].direction;
        uniforms.uShadeColor.value = this.sheetSettings[side.id].shadeColor;
        uniforms.uShadeAmount.value = this.sheetSettings[side.id].shadeAmount;
        uniforms.uWhiteThreshold.value = this.sheetSettings.ripWhiteThreshold;
      });
    }

}

completeRip()
  {
    if (this.sheetSettings.tearAmount >= 1.15) this.remove();else
    this.reset();
  }

reset()
  {
    gsap.to(this.sheetSettings, { tearAmount: 0, onUpdate: () => this.updateUniforms() });
  }

remove()
  {
    this.interactive = false;
    this.destroyCallback();
    const removeAnimation = gsap.timeline({ defaults: { duration: 1, ease: 'power2.in' }, onComplete: () => this.destroyMe() });
    removeAnimation.to(this.sheetSettings, { tearAmount: 1.5 + Math.random() * 1.5, ease: 'power2.out', onUpdate: () => this.updateUniforms() });
    removeAnimation.to(this.group.position, { z: 1 }, 0);

this.sides.forEach((side) =>
    {
      removeAnimation.to(side.mesh.position, { y: -3 + Math.random() * -3, x: (2 + Math.random() * 3) * (this.sheetSettings[side.id].ripSide - 0.5) }, 0);
      removeAnimation.to(side.mesh.rotation, { z: (-2 + Math.random() * -3) * (this.sheetSettings[side.id].ripSide - 0.5) }, 0);
    });
  }

destroyMe()
  {
    this.sheetPlane.dispose();
    this.sides.forEach((side) =>
    {
      side.material.dispose();
      this.group.remove(side.mesh);
    });
  }}

let interacted = false;

/**
 * Stage
 */

const canvas = document.querySelector('canvas.webgl');
const stage = new Stage(canvas, '#F1EBE4', '#D5C3AE');

/**
 * Loaders
 */

const loaderScreen = new Loader('black');
stage.add(loaderScreen.mesh);

const loadingManager = new THREE.LoadingManager(
() =>
{
  const tl = gsap.timeline();
  tl.to(loaderScreen, { progress: 1, alpha: 0, duration: .5, ease: 'power4.inOut' }, 0);

init();
});

const textureLoader = new THREE.TextureLoader(loadingManager);

/**
 * Lights
 */

let envLight = new THREE.AmbientLight({ color: 'white', intensity: 6 });
stage.add(envLight);

let pointLight = new THREE.PointLight({ color: 'white', intensity: 20 });
pointLight.position.z = -1;
stage.add(pointLight);

/**
 * Materials
 */

const images = [
{
  texture: textureLoader.load('https://images.unsplash.com/photo-1544027993-37dbfe43562a?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D'),
  colors: [[192, 208, 220], [217, 190, 174]] },

{
  texture: textureLoader.load('https://images.unsplash.com/photo-1521839745427-1f25030b3a46?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D'),
  colors: [[168, 163, 150], [218, 180, 141]] }];

let currentImage = -1;
const textureRip = textureLoader.load('https://assets.codepen.io/557388/rip.jpg');
const textureBorder = textureLoader.load('https://assets.codepen.io/557388/border.png');

/**
 * Paper
 */

const postInitTextureLoader = new THREE.TextureLoader();

const getMousePos = (x, y) =>
{
  return {
    x: x / stage.sizes.width * 2 - 1,
    y: -(y / stage.sizes.height) * 2 + 1 };

};

const down = (x, y) =>
{
  if (photos.length && photos[0].interactive)
  {
    interacted = true;
    hideHand();
    let pos = getMousePos(x, y);
    mouseStart.x = pos.x;
    mouseStart.y = pos.y;
    mouseDown = true;
  }
};

const move = (x, y) =>
{
  if (mouseDown && photos.length && photos[0].interactive)
  {
    let pos = getMousePos(x, y);
    let distanceY = mouseStart.y - pos.y;

photos[0].sheetSettings.tearAmount = Math.max(2 * distanceY, 0);
    photos[0].updateUniforms();
  }
};

const up = () =>
{
  if (mouseDown && photos.length && photos[0].interactive)
  {
    mouseDown = false;
    photos[0].completeRip();
  }
};

const loadExtraPhoto = () =>
{
  const nextImage = extraImages.shift();
  images.push({
    texture: postInitTextureLoader.load(nextImage.file),
    colors: nextImage.colors });

};

const addNewPhoto = () =>
{
  currentImage++;
  if (currentImage >= images.length) currentImage = 0;

if (images.length - currentImage < 2 && extraImages.length) loadExtraPhoto();

mouseDown = false;

const nextImage = images[currentImage];

let photo = new Photo(
  {
    photo: nextImage.texture,
    rip: textureRip,
    border: textureBorder },

() => addNewPhoto());

photos.unshift(photo);
  stage.add(photo.group);

gsap.to(stage.background.material.uniforms.uColorB.value, {
    r: nextImage.colors[0][0] / 255,
    g: nextImage.colors[0][1] / 255,
    b: nextImage.colors[0][2] / 255,
    ease: 'power4.inOut',
    duration: 1 });

gsap.to(stage.background.material.uniforms.uColorA.value, {
    r: nextImage.colors[1][0] / 255,
    g: nextImage.colors[1][1] / 255,
    b: nextImage.colors[1][2] / 255,
    ease: 'power4.inOut',
    duration: 1 });

};

const init = () =>
{
  addNewPhoto();

window.addEventListener('mousedown', event => down(event.clientX, event.clientY));
  window.addEventListener('touchstart', event => down(event.touches[0].clientX, event.touches[0].clientY));
  window.addEventListener('mousemove', event => move(event.clientX, event.clientY));
  window.addEventListener('touchmove', event => move(event.touches[0].clientX, event.touches[0].clientY));
  window.addEventListener('mouseup', up);
  window.addEventListener('touchend', up);
};

/**
 * Tick
 */

const clock = new THREE.Clock();

const tick = () =>
{
  const elapsedTime = clock.getElapsedTime();
  stage.render(elapsedTime);
  window.requestAnimationFrame(tick);
};

tick();

const hand = document.getElementById('hand');
const downDuration = 2;
const upDuration = 0.7;

hintAnimation.pause();

const showHand = () =>
{
  if (!interacted)
  {
    hintAnimation.play();
    gsap.to(hand, { opacity: 1 });
  }
};

const hideHand = () =>
{
  gsap.to(hand, { opacity: 0, onComplete: () => hintAnimation.pause() });
};

setTimeout(() => showHand(), 5000);

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