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Multi-perspective 3D rotatable HTML5 Logo animation_html5 tutorial skills

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May 16, 2016 pm 03:45 PM

3d rotation html5 logo

This is a 3D animation special effect based on HTML5 and CSS3. Different from the previous 3D special effects, this one is completely implemented using HTML5 features instead of superimposing multiple pictures. Another feature of this 3D animation is that it can rotate infinitely, so that the HTML5 Logo can be observed from multiple perspectives.

Online demo Source code download

HTML code

XML/HTML CodeCopy content to clipboard

<div class="link-overlay">
div>
<canvas id="canvas" style="background-color:#ddd">< /canvas>

JavaScript code

JavaScript CodeCopy content to clipboard

// bind to window onload handler
window.addEventListener('load', onloadHandler, false);
/**
* Window onload handler
*/
function onloadHandler()
{
var canvas = document.getElementById('canvas');
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
var k3dmain = new K3D.Controller(canvas, true);
// generate 3D objects
var obj1 = new K3D.K3DObject();
with (obj1)
{
drawmode = "solid";
shademode = "lightsource";
sortmode = "unsorted";
addphi = -0.5;
abouty = -90;
perslevel = 1000;
init(
[{x:-80,y:180,z:0},{x:0,y:180,z:-80},{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:-50,y:150,z:-30},{x:0,y:150,z:-80},{x:0,y:130,z:-80},{x:-30,y:130,z:-50},{x:-28,y:110,z:-52},{x:0,y:110,z:-80},{x:0,y:90,z:-80},{x:-45,y:90,z:-35},{x:-44,y:80,z:-36},{x:-25,y:80,z:-55},{x:-22,y:66,z:-58},{x:0,y:60,z:-80},{x:0,y:40,z:-80},{x:-40,y:50,z:-40}],
[],
[{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]
);
}
k3dmain.addK3DObject(obj1);
var obj2 = new K3D.K3DObject();
with (obj2)
{
drawmode = "solid";
shademode = "lightsource";
sortmode = "unsorted";
addphi = -0.5;
abouty = -90;
perslevel = 1000;
init(
[{x:0,y:180,z:-80},{x:80,y:180,z:0},{x:80,y:20,z:0},{x:0,y:0,z:-80},{x:0,y:165,z:-80},{x:68,y:165,z:-12},{x:55,y:35,z:-25},{x:0,y:20,z:-80},{x:0,y:150,z:-80},{x:50,y:150,z:-30},{x:47,y:130,z:-33},{x:0,y:130,z:-80},{x:0,y:110,z:-80},{x:45,y:110,z:-35},{x:40,y:50,z:-40},{x:0,y:40,z:-80},{x:0,y:60,z:-80},{x:20,y:66,z:-60},{x:23,y:90,z:-57},{x:0,y:90,z:-80}],
[],
[{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]
);
}
k3dmain.addK3DObject(obj2);
var obj3 = new K3D.K3DObject();
with (obj3)
{
drawmode = "solid";
shademode = "lightsource";
sortmode = "unsorted";
addphi = -0.5;
abouty = -90;
perslevel = 1000;
init(
[{x:80,y:180,z:0},{x:0,y:180,z:80},{x:0,y:0,z:80},{x:80,y:20,z:0},{x:50,y:150,z:30},{x:0,y:150,z:80},{x:0,y:130,z:80},{x:30,y:130,z:50},{x:28,y:110,z:52},{x:0,y:110,z:80},{x:0,y:90,z:80},{x:45,y:90,z:35},{x:44,y:80,z:36},{x:25,y:80,z:55},{x:22,y:66,z:58},{x:0,y:60,z:80},{x:0,y:40,z:80},{x:40,y:50,z:40}],
[],
[{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[235,235,235],vertices:[4,5,6,7,8,9,10,11,4]},{color:[235,235,235],vertices:[12,13,14,15,16,17,12]}]
);
}
k3dmain.addK3DObject(obj3);
var obj4 = new K3D.K3DObject();
with (obj4)
{
drawmode = "solid";
shademode = "lightsource";
sortmode = "unsorted";
addphi = -0.5;
abouty = -90;
perslevel = 1000;
init(
[{x:0,y:180,z:80},{x:-80,y:180,z:0},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:0,y:165,z:80},{x:-68,y:165,z:12},{x:-55,y:35,z:25},{x:0,y:20,z:80},{x:0,y:150,z:80},{x:-50,y:150,z:30},{x:-47,y:130,z:33},{x:0,y:130,z:80},{x:0,y:110,z:80},{x:-45,y:110,z:35},{x:-40,y:50,z:40},{x:0,y:40,z:80},{x:0,y:60,z:80},{x:-20,y:66,z:60},{x:-23,y:90,z:57},{x:0,y:90,z:80}],
[],
[{color:[227,76,38],vertices:[0,1,2,3,0]},{color:[240,101,41],vertices:[4,5,6,7,4]},{color:[235,235,235],vertices:[8,9,10,11,8]},{color:[235,235,235],vertices:[12,13,14,15,16,17,18,19,12]}]
);
}
k3dmain.addK3DObject(obj4);
var objBase = new K3D.K3DObject();
with (objBase)
{
drawmode = "solid";
shademode = "lightsource";
sortmode = "unsorted";
addphi = -0.5;
abouty = -90;
perslevel = 1000;
init(
[{x:0,y:0,z:-80},{x:-80,y:20,z:0},{x:0,y:0,z:80},{x:80,y:20,z:0}],
[],
[{color:[227,76,38],vertices:[0,2,1,0]},{color:[227,76,38],vertices:[0,3,2,0]}]
);
}
k3dmain.addK3DObject(objBase);
var objHtml = new K3D.K3DObject();
with (objHtml)
{
drawmode = "solid";
shademode = "lightsource";
//sortmode = "unsorted";
color = [64,64,64];
doublesided = true;
addphi = -0.5;
abouty = 100;
scale = 0.75;
perslevel = 1000;
init(
[{x:-80,y:40,z:0},{x:-70,y:40,z:0},{x:-70,y:30,z:0},{x:-60,y:30,z:0},{x:-60,y:40,z:0},{x:-50,y:40,z:0},{x:-50,y:10,z:0},{x:-60,y:10,z:0},{x:-60,y:20,z:0},{x:-70,y:20,z:0},{x:-70,y:10,z:0},{x:-80,y:10,z:0},{x:-40,y:40,z:0},{x:-10,y:40,z:0},{x:-10,y:30,z:0},{x:-20,y:30,z:0},{x:-20,y:10,z:0},{x:-30,y:10,z:0},{x:-30,y:30,z:0},{x:-40,y:30,z:0},{x:0,y:40,z:0},{x:10,y:40,z:0},{x:20,y:30,z:0},{x:30,y:40,z:0},{x:40,y:40,z:0},{x:40,y:10,z:0},{x:30,y:10,z:0},{x:30,y:30,z:0},{x:20,y:20,z:0},{x:10,y:30,z:0},{x:10,y:10,z:0},{x:0,y:10,z:0},{x:50,y:40,z:0},{x:60,y:40,z:0},{x:60,y:20,z:0},{x:80,y:20,z:0},{x:80,y:10,z:0},{x:50,y:10,z:0}],
[],
[{vertices:[0,1,2,3,4,5,6,7,8,9,10,11,0]},{vertices:[12,13,14,15,16,17,18,19,12]},{vertices:[20,21,22,23,24,25,26,27,28,29,30,31,20]},{vertices:[32,33,34,35,36,37,32]}]
);
}
k3dmain.addK3DObject(objHtml);
// add render loop callback
var ctx = canvas.getContext('2d');
var rotationOffset = 0;
var len = (canvas.height > canvas.width ? canvas.height : canvas.width) * 0.7;
k3dmain.clearBackground = false;
k3dmain.callback = function()
{
// manually clear bg - as we want to render some extra goodies
ctx.clearRect(0, 0, canvas.width, canvas.height);
// draw bg effect before K3D does its 3D rendering
ctx.save();
ctx.translate(canvas.width/2, canvas.height/2);
ctx.rotate(rotationOffset);
// first fill pass - outer rays
var RAYCOUNT = 24;
ctx.fillStyle = "#eee";
ctx.beginPath();
for (var i=0; i
{
// rotate context
ctx.rotate(TWOPI / RAYCOUNT);
ctx.moveTo(0, 0);
ctx.lineTo(-20, len);
ctx.lineTo(20, len);
}
ctx.closePath();
ctx.fill();
// second fill pass - inner rays
ctx.fillStyle = "#fff";
ctx.beginPath();
for (var i=0; i
{
// rotate context
ctx.rotate(TWOPI / RAYCOUNT);
ctx.moveTo(0, 0);
ctx.lineTo(-15, len);
ctx.lineTo(15, len);
}
ctx.closePath();
ctx.fill();
ctx.restore();
rotationOffset = 0.005;
// apply user interaction to rotation
for (var i=0, objs=k3dmain.objects; i
{
objs[i].ophi = targetRotationX;
}
if (targetRotationX > -0.5) targetRotationX -= 0.05;
else if (targetRotationX < -0.55) targetRotationX = 0.05;
if (targetRotationX > -0.55 && targetRotationX < -0.5) targetRotationX = -0.5;
};
// start demo loop
k3dmain.paused = true;
setInterval(function(){k3dmain.tick()}, 1000/60);
}
// nifty drag/touch event capture code borrowed from Mr Doob http://mrdoob.com/
var targetRotationX = 0;
var targetRotationOnMouseDownX = 0;
var mouseX = 0;
var mouseXOnMouseDown = 0;
var targetRotationY = 0;
var targetRotationOnMouseDownY = 0;
var mouseY = 0;
var mouseYOnMouseDown = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
document.addEventListener('mousedown', onDocumentMouseDown, false);
document.addEventListener('touchstart', onDocumentTouchStart, false);
document.addEventListener('touchmove', onDocumentTouchMove, false);
function onDocumentMouseDown( event ) {
event.preventDefault();
document.addEventListener('mousemove', onDocumentMouseMove, false);
document.addEventListener('mouseup', onDocumentMouseUp, false);
document.addEventListener('mouseout', onDocumentMouseOut, false);
mouseXOnMouseDown = event.clientX - windowHalfX;
targetRotationOnMouseDownX = targetRotationX;
mouseYOnMouseDown = event.clientY - windowHalfY;
targetRotationOnMouseDownY = targetRotationY;
}
function onDocumentMouseMove( event )
{
mouseX = event.clientX - windowHalfX;
targetRotationX = targetRotationOnMouseDownX (mouseX - mouseXOnMouseDown) * 0.02;
mouseY = event.clientY - windowHalfY;
targetRotationY = targetRotationOnMouseDownY (mouseY - mouseYOnMouseDown) * 0.02;
}
function onDocumentMouseUp( event )
{
document.removeEventListener('mousemove', onDocumentMouseMove, false);
document.removeEventListener('mouseup', onDocumentMouseUp, false);
document.removeEventListener('mouseout', onDocumentMouseOut, false);
}
function onDocumentMouseOut( event )
{
document.removeEventListener('mousemove', onDocumentMouseMove, false);
document.removeEventListener('mouseup', onDocumentMouseUp, false);
document.removeEventListener('mouseout', onDocumentMouseOut, false);
}
function onDocumentTouchStart( event )
{
if (event.touches.length == 1)
{
event.preventDefault();
mouseXOnMouseDown = event.touches[0].pageX - windowHalfX;
targetRotationOnMouseDownX = targetRotationX;
mouseYOnMouseDown = event.touches[0].pageY - windowHalfY;
targetRotationOnMouseDownY = targetRotationY;
}
}
function onDocumentTouchMove( event )
{
if (event.touches.length == 1)
{
event.preventDefault();
mouseX = event.touches[0].pageX - windowHalfX;
targetRotationX = targetRotationOnMouseDownX (mouseX - mouseXOnMouseDown) * 0.05;
mouseY = event.touches[0].pageY - windowHalfY;
targetRotationY = targetRotationOnMouseDownY (mouseX - mouseYOnMouseDown) * 0.05;
}
}

以上就是本文的全部内容，希望对大家的学习有所帮助。

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