简单漂亮的jQuery+css3线条步骤流程动画特效,鼠标悬停到哪一步,就动画凸起突出展示。
js代码
<script>
var process = $('.process');
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var SECTION_WIDTH = 200;
var sections = [];
var create = function(start) {
var section = {
start: start,
width: SECTION_WIDTH,
height: 45,
hMax: 35,
hMod: 0,
progress: 0,
dot: {
x: 0,
y: 0
}
};
section.end = section.start + section.width;
section.dot.x = section.start + section.width/2;
section.dot.y = section.height;
sections.push(section);
};
var draw = function(s) {
var wMod = s.width * 0.3;
ctx.beginPath();
ctx.moveTo(s.start, s.height);
ctx.bezierCurveTo(
s.start+wMod, s.height,
s.start+wMod, s.height - s.hMod,
s.start + s.width/2, s.height - s.hMod
);
ctx.bezierCurveTo(
s.end-wMod, s.height - s.hMod,
s.end-wMod, s.height,
s.end, s.height
);
ctx.lineWidth = 4;
ctx.strokeStyle = 'white';
ctx.stroke();
ctx.beginPath();
ctx.fillStyle = 'white';
ctx.arc(s.dot.x, s.dot.y, 8, 0, Math.PI * 2);
ctx.fill();
};
function quad(progress) {
return Math.pow(progress, 2);
}
function makeEaseOut(delta) {
return function(progress) {
return 1 - delta(1 - progress);
}
}
var quadOut = makeEaseOut(quad);
var bend = function(s) {
if(s.progress < s.hMax) {
var delta = quadOut(s.progress/s.hMax);
s.hMod = s.hMax*delta;
s.dot.y = s.height - s.hMax*delta;
s.progress++;
}
};
var reset = function(s) {
if(s.progress > 0) {
var delta = quadOut(s.progress/s.hMax);
s.hMod = s.hMax*delta;
s.dot.y = s.height - s.hMax*delta;
s.progress -= 2;
} else {
s.hMod = 0;
s.dot.y = s.height;
s.progress = 0;
}
};
var currentSection = 0;
process.on('mousemove', function(event) {
var section = Math.floor((event.clientX - process.offset().left) / SECTION_WIDTH);
currentSection = section;
process.find('.active').removeClass('active');
process.find('li').eq(section).addClass('active');
});
create(0);
create(200);
create(400);
create(600);
var loop = function() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
sections.forEach(function(s, index) {
if(currentSection === index) {
bend(s);
} else {
reset(s);
}
draw(s);
});
window.requestAnimationFrame(loop);
};
loop();</script>
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