$(function() {
// Vars
var pointsA = [],
pointsB = [],
$canvas = null,
canvas = null,
context = null,
vars = null,
points = 8,
viscosity = 20,
mouseDist = 70,
damping = 0.05,
showIndicators = false;
mouseX = 0,
mouseY = 0,
relMouseX = 0,
relMouseY = 0,
mouseLastX = 0,
mouseLastY = 0,
mouseDirectionX = 0,
mouseDirectionY = 0,
mouseSpeedX = 0,
mouseSpeedY = 0;
/**
* Get mouse direction
*/
function mouseDirection(e) {
if (mouseX < e.pageX)
mouseDirectionX = 1;
else if (mouseX > e.pageX)
mouseDirectionX = -1;
else
mouseDirectionX = 0;
if (mouseY < e.pageY)
mouseDirectionY = 1;
else if (mouseY > e.pageY)
mouseDirectionY = -1;
else
mouseDirectionY = 0;
mouseX = e.pageX;
mouseY = e.pageY;
relMouseX = (mouseX - $canvas.offset().left);
relMouseY = (mouseY - $canvas.offset().top);
}
$(document).on('mousemove', mouseDirection);
/**
* Get mouse speed
*/
function mouseSpeed() {
mouseSpeedX = mouseX - mouseLastX;
mouseSpeedY = mouseY - mouseLastY;
mouseLastX = mouseX;
mouseLastY = mouseY;
setTimeout(mouseSpeed, 50);
}
mouseSpeed();
/**
* Init button
*/
function initButton() {
// Get button
var button = $('.btn-liquid');
var buttonWidth = button.width();
var buttonHeight = button.height();
// Create canvas
$canvas = $('<canvas></canvas>');
button.append($canvas);
canvas = $canvas.get(0);
canvas.width = buttonWidth+100;
canvas.height = buttonHeight+100;
context = canvas.getContext('2d');
// Add points
var x = buttonHeight/2;
for(var j = 1; j < points; j++) {
addPoints((x+((buttonWidth-buttonHeight)/points)*j), 0);
}
addPoints(buttonWidth-buttonHeight/5, 0);
addPoints(buttonWidth+buttonHeight/10, buttonHeight/2);
addPoints(buttonWidth-buttonHeight/5, buttonHeight);
for(var j = points-1; j > 0; j--) {
addPoints((x+((buttonWidth-buttonHeight)/points)*j), buttonHeight);
}
addPoints(buttonHeight/5, buttonHeight);
addPoints(-buttonHeight/10, buttonHeight/2);
addPoints(buttonHeight/5, 0);
// addPoints(x, 0);
// addPoints(0, buttonHeight/2);
// addPoints(0, buttonHeight/2);
// addPoints(buttonHeight/4, 0);
// Start render
renderCanvas();
}
/**
* Add points
*/
function addPoints(x, y) {
pointsA.push(new Point(x, y, 1));
pointsB.push(new Point(x, y, 2));
}
/**
* Point
*/
function Point(x, y, level) {
this.x = this.ix = 50+x;
this.y = this.iy = 50+y;
this.vx = 0;
this.vy = 0;
this.cx1 = 0;
this.cy1 = 0;
this.cx2 = 0;
this.cy2 = 0;
this.level = level;
}
Point.prototype.move = function() {
this.vx += (this.ix - this.x) / (viscosity*this.level);
this.vy += (this.iy - this.y) / (viscosity*this.level);
var dx = this.ix - relMouseX,
dy = this.iy - relMouseY;
var relDist = (1-Math.sqrt((dx * dx) + (dy * dy))/mouseDist);
// Move x
if ((mouseDirectionX > 0 && relMouseX > this.x) || (mouseDirectionX < 0 && relMouseX < this.x)) {
if (relDist > 0 && relDist < 1) {
this.vx = (mouseSpeedX / 4) * relDist;
}
}
this.vx *= (1 - damping);
this.x += this.vx;
// Move y
if ((mouseDirectionY > 0 && relMouseY > this.y) || (mouseDirectionY < 0 && relMouseY < this.y)) {
if (relDist > 0 && relDist < 1) {
this.vy = (mouseSpeedY / 4) * relDist;
}
}
this.vy *= (1 - damping);
this.y += this.vy;
};
/**
* Render canvas
*/
function renderCanvas() {
// rAF
rafID = requestAnimationFrame(renderCanvas);
// Clear scene
context.clearRect(0, 0, $canvas.width(), $canvas.height());
context.fillStyle = '#fff';
context.fillRect(0, 0, $canvas.width(), $canvas.height());
// Move points
for (var i = 0; i <= pointsA.length - 1; i++) {
pointsA[i].move();
pointsB[i].move();
}
// Create dynamic gradient
var gradientX = Math.min(Math.max(mouseX - $canvas.offset().left, 0), $canvas.width());
var gradientY = Math.min(Math.max(mouseY - $canvas.offset().top, 0), $canvas.height());
var distance = Math.sqrt(Math.pow(gradientX - $canvas.width()/2, 2) + Math.pow(gradientY - $canvas.height()/2, 2)) / Math.sqrt(Math.pow($canvas.width()/2, 2) + Math.pow($canvas.height()/2, 2));
var gradient = context.createRadialGradient(gradientX, gradientY, 300+(300*distance), gradientX, gradientY, 0);
gradient.addColorStop(0, '#102ce5');
gradient.addColorStop(1, '#E406D6');
// Draw shapes
var groups = [pointsA, pointsB]
for (var j = 0; j <= 1; j++) {
var points = groups[j];
if (j == 0) {
// Background style
context.fillStyle = '#1CE2D8';
} else {
// Foreground style
context.fillStyle = gradient;
}
context.beginPath();
context.moveTo(points[0].x, points[0].y);
for (var i = 0; i < points.length; i++) {
var p = points[i];
var nextP = points[i + 1];
var val = 30*0.552284749831;
if (nextP != undefined) {
// if (nextP.ix > p.ix && nextP.iy < p.iy) {
// p.cx1 = p.x;
// p.cy1 = p.y-val;
// p.cx2 = nextP.x-val;
// p.cy2 = nextP.y;
// } else if (nextP.ix > p.ix && nextP.iy > p.iy) {
// p.cx1 = p.x+val;
// p.cy1 = p.y;
// p.cx2 = nextP.x;
// p.cy2 = nextP.y-val;
// } else if (nextP.ix < p.ix && nextP.iy > p.iy) {
// p.cx1 = p.x;
// p.cy1 = p.y+val;
// p.cx2 = nextP.x+val;
// p.cy2 = nextP.y;
// } else if (nextP.ix < p.ix && nextP.iy < p.iy) {
// p.cx1 = p.x-val;
// p.cy1 = p.y;
// p.cx2 = nextP.x;
// p.cy2 = nextP.y+val;
// } else {
p.cx1 = (p.x+nextP.x)/2;
p.cy1 = (p.y+nextP.y)/2;
p.cx2 = (p.x+nextP.x)/2;
p.cy2 = (p.y+nextP.y)/2;
context.bezierCurveTo(p.x, p.y, p.cx1, p.cy1, p.cx1, p.cy1);
// continue;
// }
// context.bezierCurveTo(p.cx1, p.cy1, p.cx2, p.cy2, nextP.x, nextP.y);
} else {
nextP = points[0];
p.cx1 = (p.x+nextP.x)/2;
p.cy1 = (p.y+nextP.y)/2;
context.bezierCurveTo(p.x, p.y, p.cx1, p.cy1, p.cx1, p.cy1);
}
}
// context.closePath();
context.fill();
}
if (showIndicators) {
// Draw points
context.fillStyle = '#000';
context.beginPath();
for (var i = 0; i < pointsA.length; i++) {
var p = pointsA[i];
context.rect(p.x - 1, p.y - 1, 2, 2);
}
context.fill();
// Draw controls
context.fillStyle = '#f00';
context.beginPath();
for (var i = 0; i < pointsA.length; i++) {
var p = pointsA[i];
context.rect(p.cx1 - 1, p.cy1 - 1, 2, 2);
context.rect(p.cx2 - 1, p.cy2 - 1, 2, 2);
}
context.fill();
}
}
// Init
initButton();
});
