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js imitation Matrix letter drop effect code sharing

PHPz

May 16, 2016 pm 03:44 PM

This article mainly shows the JS imitation The Matrix letter dropping effect. Friends who need it can refer to it:

Friends who have watched The Matrix may be familiar with the subtitle effect at the beginning. Since the video was played Since then, many web designers have been imitating this effect of letters falling, and finally there is a text display effect of "I love you". You can modify it slightly and use it to express your love to your lover on Valentine's Day. ~

Operation renderings:

Let’s run it too.

I would like to share with you the js imitation Matrix letter drop effect code as follows:

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JS仿黑客帝国字母掉落效果</title>
<style type=text/css>
.matrix{padding-right: 0px; padding-left: 0px; font-size: 10pt; padding-bottom: 0px; margin: 0px; width: 10px; padding-top: 0px; font-family: lucida console, courier, monotype; text-align: center}
</style>
</head>
<body>
<center>JS仿黑客帝国字母掉落效果</center><br><center>

<SCRIPT language=JavaScript type=text/javascript>
var rows=11; // must be an odd number
var speed=50; // lower is faster
var reveal=2; // between 0 and 2 only. The higher, the faster the word appears
var effectalign="default" //enter "center" to center it.
var w3c=document.getElementById && !window.opera;;
var ie45=document.all && !window.opera;
var ma_tab, matemp, ma_bod, ma_row, x, y, columns, ma_txt, ma_cho;
var m_coch=new Array();
var m_copo=new Array();
window.onload=function() {
 if (!w3c && !ie45) return
 var matrix=(w3c)?document.getElementById("matrix"):document.all["matrix"];
 ma_txt=(w3c)?matrix.firstChild.nodeValue:matrix.innerHTML;
 ma_txt=" "+ma_txt+" ";
 columns=ma_txt.length;
 if (w3c) {
 while (matrix.childNodes.length) matrix.removeChild(matrix.childNodes[0]);
 ma_tab=document.createElement("table");
 ma_tab.setAttribute("border", 0);
 ma_tab.setAttribute("align", effectalign);
 ma_tab.style.backgroundColor="#000000";
 ma_bod=document.createElement("tbody");
 for (x=0; x<rows; x++) {
 ma_row=document.createElement("tr");
 for (y=0; y<columns; y++) {
 matemp=document.createElement("td");
 matemp.setAttribute("id", "Mx"+x+"y"+y);
 matemp.className="matrix";
 matemp.appendChild(document.createTextNode(String.fromCharCode(160)));
 ma_row.appendChild(matemp);
 }
 ma_bod.appendChild(ma_row);
 }
 ma_tab.appendChild(ma_bod);
 matrix.appendChild(ma_tab);
 } else {
 ma_tab=&#39;<ta&#39;+&#39;ble align="&#39;+effectalign+&#39;" border="0" style="background-color:#000000">&#39;;
 for (var x=0; x<rows; x++) {
 ma_tab+=&#39;<t&#39;+&#39;r>&#39;;
 for (var y=0; y<columns; y++) {
 ma_tab+=&#39;<t&#39;+&#39;d class="matrix" id="Mx&#39;+x+&#39;y&#39;+y+&#39;">?</&#39;+&#39;td>&#39;;
 }
 ma_tab+=&#39;</&#39;+&#39;tr>&#39;;
 }
 ma_tab+=&#39;</&#39;+&#39;table>&#39;;
 matrix.innerHTML=ma_tab;
 }
 ma_cho=ma_txt;
 for (x=0; x<columns; x++) {
 ma_cho+=String.fromCharCode(32+Math.floor(Math.random()*94));
 m_copo[x]=0;
 }
 ma_bod=setInterval("mytricks()", speed);
}

function mytricks() {
 x=0;
 for (y=0; y<columns; y++) {
 x=x+(m_copo[y]==100);
 ma_row=m_copo[y]%100;
 if (ma_row && m_copo[y]<100) {
 if (ma_row<rows+1) {
 if (w3c) {
 matemp=document.getElementById("Mx"+(ma_row-1)+"y"+y);
 matemp.firstChild.nodeValue=m_coch[y];
 }
 else {
 matemp=document.all["Mx"+(ma_row-1)+"y"+y];
 matemp.innerHTML=m_coch[y];
 }
 matemp.style.color="#33ff66";
 matemp.style.fontWeight="bold";
 }
 if (ma_row>1 && ma_row<rows+2) {
 matemp=(w3c)?document.getElementById("Mx"+(ma_row-2)+"y"+y):document.all["Mx"+(ma_row-2)+"y"+y];
 matemp.style.fontWeight="normal";
 matemp.style.color="#00ff00";
 }
 if (ma_row>2) {
 matemp=(w3c)?document.getElementById("Mx"+(ma_row-3)+"y"+y):document.all["Mx"+(ma_row-3)+"y"+y];
 matemp.style.color="#009900";
 }
 if (ma_row<Math.floor(rows/2)+1) m_copo[y]++;
 else if (ma_row==Math.floor(rows/2)+1 && m_coch[y]==ma_txt.charAt(y)) zoomer(y);
 else if (ma_row<rows+2) m_copo[y]++;
 else if (m_copo[y]<100) m_copo[y]=0;
 }
 else if (Math.random()>0.9 && m_copo[y]<100) {
 m_coch[y]=ma_cho.charAt(Math.floor(Math.random()*ma_cho.length));
 m_copo[y]++;
 }
 }
 if (x==columns) clearInterval(ma_bod);
}

function zoomer(ycol) {
 var mtmp, mtem, ytmp;
 if (m_copo[ycol]==Math.floor(rows/2)+1) {

 for (ytmp=0; ytmp<rows; ytmp++) {
 if (w3c) {
 mtmp=document.getElementById("Mx"+ytmp+"y"+ycol);
 mtmp.firstChild.nodeValue=m_coch[ycol];
 }
 else {
 mtmp=document.all["Mx"+ytmp+"y"+ycol];
 mtmp.innerHTML=m_coch[ycol];
 }
 mtmp.style.color="#33ff66";
 mtmp.style.fontWeight="bold";
 }
 if (Math.random()<reveal) {
 mtmp=ma_cho.indexOf(ma_txt.charAt(ycol));
 ma_cho=ma_cho.substring(0, mtmp)+ma_cho.substring(mtmp+1, ma_cho.length);
 }
 if (Math.random()<reveal-1) ma_cho=ma_cho.substring(0, ma_cho.length-1);
 m_copo[ycol]+=199;
 setTimeout("zoomer("+ycol+")", speed);
 }
 else if (m_copo[ycol]>200) {
 if (w3c) {
 mtmp=document.getElementById("Mx"+(m_copo[ycol]-201)+"y"+ycol);
 mtem=document.getElementById("Mx"+(200+rows-m_copo[ycol]--)+"y"+ycol);
 }
 else {
 mtmp=document.all["Mx"+(m_copo[ycol]-201)+"y"+ycol];
 mtem=document.all["Mx"+(200+rows-m_copo[ycol]--)+"y"+ycol];
 }
 mtmp.style.fontWeight="normal";
 mtem.style.fontWeight="normal";
 setTimeout("zoomer("+ycol+")", speed);
 }
 else if (m_copo[ycol]==200) m_copo[ycol]=100+Math.floor(rows/2);
 if (m_copo[ycol]>100 && m_copo[ycol]<200) {
 if (w3c) {
 mtmp=document.getElementById("Mx"+(m_copo[ycol]-101)+"y"+ycol);
 mtmp.firstChild.nodeValue=String.fromCharCode(160);
 mtem=document.getElementById("Mx"+(100+rows-m_copo[ycol]--)+"y"+ycol);
 mtem.firstChild.nodeValue=String.fromCharCode(160);
 }
 else {
 mtmp=document.all["Mx"+(m_copo[ycol]-101)+"y"+ycol];
 mtmp.innerHTML=String.fromCharCode(160);
 mtem=document.all["Mx"+(100+rows-m_copo[ycol]--)+"y"+ycol];
 mtem.innerHTML=String.fromCharCode(160);
 }
 setTimeout("zoomer("+ycol+")", speed);
 }
}
// -->
</SCRIPT>
<p id=matrix>I love u</p>

</center>
</body>
</html>

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