ratu - 経済統計練習帳

<!DOCTYPE html>
<html>
    <head>
        <title>abc</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="sample.js"></script>
    <script src="jquery.js"></script>
    <script src="svgpaint.js"></script>
    </head>
    <body onload="sample()">
    <div id="memo">TODO write content</div>
    </body>
</html>
 
 
var by,dy,dt,g;
 
function sample(){
 
    dt=0.1;
    dy=0;
    by=500;
    g=9.8;
 
 
    var timer;
var delay = 100;
 
var loop = function () {
 
    dy=dy-dt*g;
 
    h=0;
    if(dy<0)h=h+1;
    if(by<0)h=h+1;
    if(h==2)dy=-dy;
 
    by=by+dt*dy;
 
 
 
    paint();
 
    clearTimeout(timer);
    timer = setTimeout(loop, delay);
}
 
loop();
 
 
 
}
 
function paint(){
 
var sub=new svgpaint();
 
str="<svg width=\"500\" height=\"500\">";
str=str+sub.rect(250,500-by,5,5,"blue");
str=str+"</svg>";
 
$("#memo").html(str);   
 
}