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landing-pg.js
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landing-pg.js
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/*HEADING*/
var maxDist;
var mouse = { x: 0, y: 0 };
var cursor = {
x: window.innerWidth,
y: window.innerHeight
};
Math.dist = function (a, b) {
var dx = b.x - a.x;
var dy = b.y - a.y;
return Math.sqrt(Math.pow(dx, 2), Math.pow(dy, 2));
}
window.addEventListener("mousemove", function (e) {
cursor.x = e.clientX;
cursor.y = e.clientY;
});
window.addEventListener("touchmove", function (e) {
var t = e.touches[0];
cursor.x = t.clientX;
cursor.y = t.clientY;
}, {
passive: false
});
var Char = function (container, char) {
var span = document.createElement("span");
span.setAttribute('data-char', char);
span.innerText = char;
container.appendChild(span);
this.getDist = function () {
this.pos = span.getBoundingClientRect();
return Math.dist(mouse, {
x: this.pos.x + (this.pos.width / 100),
y: this.pos.y
});
}
this.getAttr = function (dist, min, max) {
var wght = max - Math.abs((max * dist / maxDist));
return Math.max(min, wght + min);
}
this.update = function (args) {
var dist = this.getDist();
this.wdth = args.wdth ? ~~this.getAttr(dist, 2000, 200) : 100; //// INVISIBLE HOVERING TEXT this.wdth = args.wdth ? ~~this.getAttr(dist, 5, 200) : 100;
this.wght = args.wght ? ~~this.getAttr(dist, 100, 800) : 400;
this.alpha = args.alpha ? this.getAttr(dist, 0, 1).toFixed(2) : 1;
this.ital = args.ital ? this.getAttr(dist, 0, 1).toFixed(2) : 0;
this.draw();
}
this.draw = function () {
var style = "";
style += "opacity: " + this.alpha + ";";
style += "font-variation-settings: 'wght' " + this.wght + ", 'wdth' " + this.wdth + ", 'ital' " + this.ital + ";";
span.style = style;
}
return this;
}
var VFont = function () {
this.scale = false;
this.flex = true;
this.alpha = false;
this.stroke = false;
this.width = true;
this.weight = true;
this.italic = true;
var innerve_heading, str, chars = [];
this.init = function () {
innerve_heading = document.getElementById("innerve_heading");
str = innerve_heading.innerText;
innerve_heading.innerHTML = "";
for (var i = 0; i < str.length; i++) {
var _char = new Char(innerve_heading, str[i]);
chars.push(_char);
}
this.set();
window.addEventListener("resize", this.setSize.bind(this));
}
this.set = function () {
innerve_heading.className = "";
innerve_heading.className += this.flex ? " flex" : "";
innerve_heading.className += this.stroke ? " stroke" : "";
this.setSize();
}
this.setSize = function () {
var fontSize = window.innerWidth / (str.length /2 );
innerve_heading.style = "font-size: " + fontSize + "px;";
if (this.scale) {
var scaleY = (window.innerHeight / innerve_heading.getBoundingClientRect().height).toFixed(2);
var lineHeight = scaleY * 0.8 ;
innerve_heading.style = "font-size: " + fontSize + "px; transform: scale(1," + scaleY + "); line-height: " + lineHeight + "em;"
}
}
this.animate = function () {
mouse.x += (cursor.x - mouse.x) / 20;
mouse.y += (cursor.y - mouse.y) / 20;
requestAnimationFrame(this.animate.bind(this));
this.render();
}
this.render = function () {
maxDist = innerve_heading.getBoundingClientRect().width / 2;
for (var i = 0; i < chars.length; i++) {
chars[i].update({
wght: this.weight,
wdth: this.width,
ital: this.italic,
alpha: this.alpha
});
}
}
this.init();
this.animate();
return this;
}
var txt = new VFont();
var gui = new dat.GUI();
gui.add(txt, 'flex').onChange(txt.set.bind(txt));
gui.add(txt, 'scale').onChange(txt.set.bind(txt));
gui.add(txt, 'alpha').onChange(txt.set.bind(txt));
gui.add(txt, 'stroke').onChange(txt.set.bind(txt));
// gui.add(txt, 'width').onChange(txt.set.bind(txt));
gui.add(txt, 'weight').onChange(txt.set.bind(txt));
gui.add(txt, 'italic').onChange(txt.set.bind(txt));