ripple-hover-effect
Version:
Javascript library to animate images on hover.
215 lines (181 loc) • 8.18 kB
JavaScript
/*!
* ripple-effect PACKAGED v1.0.0
* Author: Essam Abed
* MIT License
*/
var RippleEffect = function(opts) {
var vertex = `
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
}
`;
var fragment = `
uniform sampler2D image;
uniform sampler2D image2;
uniform float time;
uniform float mouseOver;
uniform float intensity;
uniform float strength;
uniform float area;
uniform float waveSpeed;
varying vec2 vUv;
#define NUM_OCTAVES 5
float rand(vec2 n) {
return fract(sin(dot(n, vec2(12.9898, 4.1414))) * 43758.5453);
}
float noise(vec2 p) {
vec2 ip = floor(p);
vec2 u = fract(p);
u = u*u*(3.0-2.0*u);
float res = mix(
mix(rand(ip),rand(ip+vec2(1.0,0.0)),u.x),
mix(rand(ip+vec2(0.0,1.0)),rand(ip+vec2(1.0,1.0)),u.x),u.y);
return res*res;
}
float fbm(vec2 x) {
float v = 0.0;
float a = 0.5;
vec2 shift = vec2(100);
// Rotate to reduce axial bias
mat2 rot = mat2(cos(0.5), sin(0.5), -sin(0.5), cos(0.50));
for (int i = 0; i < NUM_OCTAVES; ++i) {
v += a * noise(x);
x = rot * x * 2.0 + shift;
a *= 0.5;
}
return v;
}
void main(void) {
vec2 uv = vUv;
vec2 surface = strength * vec2(
mix(-0.1, 0.2, fbm(5.*uv + waveSpeed * time)),
mix(-0.1, 0.2, fbm(5.*uv + waveSpeed * time))
);
uv += mouseOver * intensity * refract(
vec2(0, 0),
surface,
1.0 / 1.333
);
vec3 _texture = texture2D(image, uv).rgb;
gl_FragColor = vec4(_texture,1.0);
}
`;
const rand = function (a, b){
return a + (b - a) * Math.random();
};
var time = 0;
var mouseOver = 0;
var playhead = rand(1, 2);
const parent = opts.parent || console.warn("no parent!");
const intensity = opts.intensity || 1;
const strength = opts.strength || 2;
const area = opts.area || 6;
const waveSpeed = opts.waveSpeed || 0.01;
const speedIn = opts.speedIn || 1.4;
const speedOut = opts.speedOut || 1.2;
var texture = opts.texture || console.error("no texture!");
var userHover = (opts.hover === undefined) ? true : opts.hover;
var easing = opts.easing || 'Expo.easeOut';
const mobileAndTabletcheck = function() {
var check = false;
(function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino|android|ipad|playbook|silk/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))) check = true;})(navigator.userAgent||navigator.vendor||window.opera);
return check;
};
const scene = new THREE.Scene();
const camera = new THREE.OrthographicCamera(
parent.offsetWidth / -2,
parent.offsetWidth / 2,
parent.offsetHeight / 2,
parent.offsetHeight / -2,
1,
1000
);
camera.position.z = 1;
const renderer = new THREE.WebGLRenderer({
antialias: false,
// alpha: true
});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setClearColor(0xffffff, 0.0);
renderer.setSize(parent.offsetWidth, parent.offsetHeight);
parent.appendChild(renderer.domElement);
const loader = new THREE.TextureLoader();
loader.crossOrigin = "";
var texture = loader.load(texture)
var texture2 = loader.load(texture2)
texture.minFilter = THREE.LinearFilter;
texture.anisotropy = renderer.getMaxAnisotropy();
const mat = new THREE.ShaderMaterial({
uniforms: {
time: { type: 'f', value: 0 },
image: { type: 't', value: texture},
image2: { type: "t", value: texture2 },
mouseOver: { type: 'f', value: mouseOver },
intensity: { type: 'f', value: intensity * playhead },
strength: { type: 'f', value: strength * playhead },
area: { type: 'f', value: area * playhead},
waveSpeed: { type: 'f', value: waveSpeed * playhead },
},
vertexShader: vertex,
fragmentShader: fragment,
transparent: true,
});
const geometry = new THREE.PlaneBufferGeometry(
parent.offsetWidth,
parent.offsetHeight,
1
);
const object = new THREE.Mesh(geometry, mat);
scene.add(object);
const addEvents = function(){
const evtIn = "mouseenter";
const evtOut = "mouseleave";
if (mobileAndTabletcheck()) {
evtIn = "touchstart";
evtOut = "touchend";
}
parent.addEventListener(evtIn, function(e) {
gsap.to(mat.uniforms.mouseOver, {
duration: speedIn,
value: 1,
ease: easing
});
});
parent.addEventListener(evtOut, function(e) {
gsap.to(mat.uniforms.mouseOver, {
duration: speedOut,
value: 0,
ease: easing
});
});
};
if (userHover) {
addEvents();
}
window.addEventListener("resize", function(e) {
renderer.setSize(parent.offsetWidth, parent.offsetHeight);
});
this.start = function(){
gsap.to(mat.uniforms.mouseOver, {
duration: speedIn,
value: 1,
ease: easing
});
}
this.stop = function(){
gsap.to(mat.uniforms.mouseOver, {
duration: speedOut,
value: 0,
ease: easing
});
};
const animate = function() {
time ++;
mat.uniforms.time.value = time;
requestAnimationFrame(animate);
renderer.render(scene, camera);
};
animate();
};