学历低干不好程序员?小伙怒怼网友写出此特效，网友纷纷倒戈点赞-技术精选-玖叶教程网

最近不知在哪个程序员论坛看到了一个程序员小伙的吐槽帖，帖子表达了这小伙伴的深深不满。帖子内容大概是这样的，是说小伙有一天在网上闲逛的时候，看到某个网站发起了一个投票，投票内容是：学历低的不适合干程序员，也干不好程序员。结果92%的投票都投给了赞成票，结果可能也刚好戳中了这个程序员小伙的痛点，可能他也因为学历点遭受过不公正待遇吧，于是他怒怼网友，写了个HTML5模拟现实圆球物理运动效果代码，网友点赞无数。

正式开讲前先推荐一下本人新建的一个web前端学习交流群627050908，不管你是web前端大牛还是小白，本群都随时欢迎你们。欢迎程序员小白前来学习，也欢迎程序员大牛灌水，吐槽，指导小白进步。

下面先上特效图，凡事讲求有图有真相嘛，睁开你的眼睛，不要眨眼，千万别错过了。

对于大牛程序员来说，这个web特效可能不值一提的，有啥好炫耀，但是对于小白程序员来说这个特效可能还是蛮吸引特们的。无论是练手，还是说复习知识点，都有很大帮助。由于篇幅有限，不贴出全部代码了，只贴出小部分代码，如对代码有兴趣，可以加群，群文件里面有特效代码。

var canvas;

var delta = [ 0, 0 ];

var stage = [ window.screenX, window.screenY, window.innerWidth, window.innerHeight ];

getBrowserDimensions();

var themes = [ [ "#10222B", "#95AB63", "#BDD684", "#E2F0D6", "#F6FFE0" ],

[ "#362C2A", "#732420", "#BF734C", "#FAD9A0", "#736859" ],

[ "#0D1114", "#102C2E", "#695F4C", "#EBBC5E", "#FFFBB8" ],

[ "#2E2F38", "#FFD63E", "#FFB54B", "#E88638", "#8A221C" ],

[ "#121212", "#E6F2DA", "#C9F24B", "#4D7B85", "#23383D" ],

[ "#343F40", "#736751", "#F2D7B6", "#BFAC95", "#8C3F3F" ],

[ "#000000", "#2D2B2A", "#561812", "#B81111", "#FFFFFF" ],

[ "#333B3A", "#B4BD51", "#543B38", "#61594D", "#B8925A" ] ];

var theme;

var worldAABB, world, iterations = 1, timeStep = 1 / 15;

var walls = [];

var wall_thickness = 200;

var wallsSetted = false;

var bodies, elements, text;

var createMode = false;

var destroyMode = false;

var isMouseDown = false;

var mouseJoint;

var mouse = { x: 0, y: 0 };

var gravity = { x: 0, y: 1 };

var PI2 = Math.PI * 2;

var timeOfLastTouch = 0;

init();

play();

function init() {

canvas = document.getElementById( 'canvas' );

document.onmousedown = onDocumentMouseDown;

document.onmouseup = onDocumentMouseUp;

document.onmousemove = onDocumentMouseMove;

document.ondblclick = onDocumentDoubleClick;

document.addEventListener( 'touchstart', onDocumentTouchStart, false );

document.addEventListener( 'touchmove', onDocumentTouchMove, false );

document.addEventListener( 'touchend', onDocumentTouchEnd, false );

window.addEventListener( 'deviceorientation', onWindowDeviceOrientation, false );

// init box2d

worldAABB = new b2AABB();

worldAABB.minVertex.Set( -200, -200 );

worldAABB.maxVertex.Set( window.innerWidth + 200, window.innerHeight + 200 );

world = new b2World( worldAABB, new b2Vec2( 0, 0 ), true );

setWalls();

reset();

}

function play() {

setInterval( loop, 1000 / 40 );

}

function reset() {

var i;

if ( bodies ) {

for ( i = 0; i < bodies.length; i++ ) {

var body = bodies[ i ]

canvas.removeChild( body.GetUserData().element );

world.DestroyBody( body );

body = null;

}

// color theme

theme = themes[ Math.random() * themes.length >> 0 ];

document.body.style[ 'backgroundColor' ] = theme[ 0 ];

bodies = [];

elements = [];

createInstructions();

for( i = 0; i < 10; i++ ) {

createBall();

}

function onDocumentMouseDown() {

isMouseDown = true;

return false;

}

function onDocumentMouseUp() {

isMouseDown = false;

return false;

}

function onDocumentMouseMove( event ) {

mouse.x = event.clientX;

mouse.y = event.clientY;

}

function onDocumentDoubleClick() {

reset();

}

function onDocumentTouchStart( event ) {

if( event.touches.length == 1 ) {

event.preventDefault();

// Faking double click for touch devices

var now = new Date().getTime();

if ( now - timeOfLastTouch < 250 ) {

reset();

return;

}

timeOfLastTouch = now;

mouse.x = event.touches[ 0 ].pageX;

mouse.y = event.touches[ 0 ].pageY;

isMouseDown = true;

}

function onDocumentTouchMove( event ) {

if ( event.touches.length == 1 ) {

event.preventDefault();

mouse.x = event.touches[ 0 ].pageX;

mouse.y = event.touches[ 0 ].pageY;

}

function onDocumentTouchEnd( event ) {

if ( event.touches.length == 0 ) {

event.preventDefault();

isMouseDown = false;

}

function onWindowDeviceOrientation( event ) {

if ( event.beta ) {

gravity.x = Math.sin( event.gamma * Math.PI / 180 );

gravity.y = Math.sin( ( Math.PI / 4 ) + event.beta * Math.PI / 180 );

}

function createInstructions() {

var size = 250;

var element = document.createElement( 'div' );

element.width = size;

element.height = size;

element.style.position = 'absolute';

element.style.left = -200 + 'px';

element.style.top = -200 + 'px';

element.style.cursor = "default";

canvas.appendChild(element);

elements.push( element );

var circle = document.createElement( 'canvas' );

circle.width = size;

circle.height = size;

var graphics = circle.getContext( '2d' );

graphics.fillStyle = theme[ 3 ];

graphics.beginPath();

graphics.arc( size * .5, size * .5, size * .5, 0, PI2, true );

graphics.closePath();

graphics.fill();

element.appendChild( circle );

text = document.createElement( 'div' );

text.onSelectStart = null;

text.innerHTML = '玩法介绍： 1. 随意拖动圆球； 2.点击页面背景； 3. 晃动浏览器； 4. 双击页面背景； 5. 按住鼠标左键。';

text.style.color = theme[1];

text.style.position = 'absolute';

text.style.left = '0px';

text.style.top = '0px';

text.style.fontFamily = 'Georgia';

text.style.textAlign = 'center';

element.appendChild(text);

text.style.left = ((250 - text.clientWidth) / 2) +'px';

text.style.top = ((250 - text.clientHeight) / 2) +'px';

var b2body = new b2BodyDef();

var circle = new b2CircleDef();

circle.radius = size / 2;

circle.density = 1;

circle.friction = 0.3;

circle.restitution = 0.3;

b2body.AddShape(circle);

b2body.userData = {element: element};

b2body.position.Set( Math.random() * stage[2], Math.random() * -200 );

b2body.linearVelocity.Set( Math.random() * 400 - 200, Math.random() * 400 - 200 );

bodies.push( world.CreateBody(b2body) );

}

function createBall( x, y ) {

var x = x || Math.random() * stage[2];

var y = y || Math.random() * -200;

var size = (Math.random() * 100 >> 0) + 20;

var element = document.createElement("canvas");

element.width = size;

element.height = size;

element.style.position = 'absolute';

element.style.left = -200 + 'px';

element.style.top = -200 + 'px';

element.style.WebkitTransform = 'translateZ(0)';

element.style.MozTransform = 'translateZ(0)';

element.style.OTransform = 'translateZ(0)';

element.style.msTransform = 'translateZ(0)';

element.style.transform = 'translateZ(0)';

var graphics = element.getContext("2d");

var num_circles = Math.random() * 10 >> 0;

for (var i = size; i > 0; i-= (size/num_circles)) {

graphics.fillStyle = theme[ (Math.random() * 4 >> 0) + 1];

graphics.beginPath();

graphics.arc(size * .5, size * .5, i * .5, 0, PI2, true);

graphics.closePath();

graphics.fill();

}

canvas.appendChild(element);

elements.push( element );

var b2body = new b2BodyDef();

var circle = new b2CircleDef();

circle.radius = size >> 1;

circle.density = 1;

circle.friction = 0.3;

circle.restitution = 0.3;

b2body.AddShape(circle);

b2body.userData = {element: element};

b2body.position.Set( x, y );

b2body.linearVelocity.Set( Math.random() * 400 - 200, Math.random() * 400 - 200 );

bodies.push( world.CreateBody(b2body) );

}

function loop() {

if (getBrowserDimensions()) {

setWalls();

}

delta[0] += (0 - delta[0]) * .5;

delta[1] += (0 - delta[1]) * .5;

world.m_gravity.x = gravity.x * 350 + delta[0];

world.m_gravity.y = gravity.y * 350 + delta[1];

mouseDrag();

world.Step(timeStep, iterations);

for (i = 0; i < bodies.length; i++) {

var body = bodies[i];

var element = elements[i];

element.style.left = (body.m_position0.x - (element.width >> 1)) + 'px';

element.style.top = (body.m_position0.y - (element.height >> 1)) + 'px';

if (element.tagName == 'DIV') {

var style = 'rotate(' + (body.m_rotation0 * 57.2957795) + 'deg) translateZ(0)';

text.style.WebkitTransform = style;

text.style.MozTransform = style;

text.style.OTransform = style;

text.style.msTransform = style;

text.style.transform = style;

}

// .. BOX2D UTILS

function createBox(world, x, y, width, height, fixed) {

if (typeof(fixed) == 'undefined') {

fixed = true;

}

var boxSd = new b2BoxDef();

if (!fixed) {

boxSd.density = 1.0;

}

boxSd.extents.Set(width, height);

var boxBd = new b2BodyDef();

boxBd.AddShape(boxSd);

boxBd.position.Set(x,y);

return world.CreateBody(boxBd);

}

function mouseDrag()

{

// mouse press

if (createMode) {

createBall( mouse.x, mouse.y );

} else if (isMouseDown && !mouseJoint) {

var body = getBodyAtMouse();

if (body) {

var md = new b2MouseJointDef();

md.body1 = world.m_groundBody;

md.body2 = body;

md.target.Set(mouse.x, mouse.y);

md.maxForce = 30000 * body.m_mass;

// md.timeStep = timeStep;

mouseJoint = world.CreateJoint(md);

body.WakeUp();

} else {

createMode = true;

}

// mouse release

if (!isMouseDown) {

createMode = false;

destroyMode = false;

if (mouseJoint) {

world.DestroyJoint(mouseJoint);

mouseJoint = null;

}

// mouse move

if (mouseJoint) {

var p2 = new b2Vec2(mouse.x, mouse.y);

mouseJoint.SetTarget(p2);

}

function getBodyAtMouse() {

// Make a small box.

var mousePVec = new b2Vec2();

mousePVec.Set(mouse.x, mouse.y);

var aabb = new b2AABB();

aabb.minVertex.Set(mouse.x - 1, mouse.y - 1);

aabb.maxVertex.Set(mouse.x + 1, mouse.y + 1);

// Query the world for overlapping shapes.

var k_maxCount = 10;

var shapes = new Array();

var count = world.Query(aabb, shapes, k_maxCount);

var body = null;

for (var i = 0; i < count; ++i) {

if (shapes[i].m_body.IsStatic() == false) {

if ( shapes[i].TestPoint(mousePVec) ) {

body = shapes[i].m_body;

break;

}

return body;

}

function setWalls() {

if (wallsSetted) {

world.DestroyBody(walls[0]);

world.DestroyBody(walls[1]);

world.DestroyBody(walls[2]);

world.DestroyBody(walls[3]);

walls[0] = null;

walls[1] = null;

walls[2] = null;

walls[3] = null;

}

walls[0] = createBox(world, stage[2] / 2, - wall_thickness, stage[2], wall_thickness);

walls[1] = createBox(world, stage[2] / 2, stage[3] + wall_thickness, stage[2], wall_thickness);

walls[2] = createBox(world, - wall_thickness, stage[3] / 2, wall_thickness, stage[3]);

walls[3] = createBox(world, stage[2] + wall_thickness, stage[3] / 2, wall_thickness, stage[3]);

wallsSetted = true;

}

// BROWSER DIMENSIONS

function getBrowserDimensions() {

var changed = false;

if (stage[0] != window.screenX) {

delta[0] = (window.screenX - stage[0]) * 50;

stage[0] = window.screenX;

changed = true;

}

if (stage[1] != window.screenY) {

delta[1] = (window.screenY - stage[1]) * 50;

stage[1] = window.screenY;

changed = true;

}

if (stage[2] != window.innerWidth) {

stage[2] = window.innerWidth;

changed = true;

}

if (stage[3] != window.innerHeight) {

stage[3] = window.innerHeight;

changed = true;

}

return changed;

}

写到这里，有很多程序员小伙伴要说了，全文下来就你在打广告了，有意思吗你。当然，写到这里还没结束，写这篇文章的目的也并非是推销这特效有多牛。我们也来讨论下，学历低的是不是干不好程序员，学历低是不是不适合做程序员，欢迎大家在评论区留言评论，说说大家的观点跟看法。

小编觉得吧学历多少还是有点关系的，试想你连字都看不懂，你怎么学得会编程，但是学历也并不是觉对的，有太多学历不高的程序员小伙伴写出了牛逼的代码，拿着高薪，只不过学历低的小伙伴学习编程可能稍微吃力点，毕竟学历不能证明你的全部能力，但也是能证明你部分能力的，不然也不用搞这种筛选制度。不过有志者事竟成，只要你对编程怀着一颗赤诚的心，带着浓厚的兴趣，不好高骛远，不要想着速成，一步一脚印，日积月累，我想还是能成为一个优秀的程序员的。

如果你想干程序员的，但是学历不高迷茫的，公众号：“web前端这些事”

或者你可以网上找点视频或者书籍自己看一看就知道了，适不适合只有自己最清楚。

玖叶教程网

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学历低干不好程序员?小伙怒怼网友写出此特效，网友纷纷倒戈点赞