oopp - 経済統計練習帳

var dx,dy;
var bx,by;
var g;
 
function sample(){
 
bx=250;
by=500;
dx=0;
dy=0;    
 
g=-1;
 
 
 
var timer;
var delay = 100;
 
var loop = function () {
 
 
    dy=dy+g;
 
 
    bx=bx+dx;
    by=by+dy;
 
    h=0;
    if(bx>500)h=h+1;
    if(dx>0)h=h+1;
    if(h==2)dx=-dx;
    h=0;
    if(bx<0)h=h+1;
    if(dx<0)h=h+1;
 
    if(h==2)dx=-dx;
 
n1=10*Math.random();
n2=Math.floor(n1)-5;
 
if(by<0)bx=250;
if(by<0)dy=0;
if(by<0)dx=n2;    
if(by<0)by=500;
 
 
 
 
    cir();
 
    paint();
 
    clearTimeout(timer);
    timer = setTimeout(loop, delay);
}
 
loop();
 
 
}
 
function cir(){
 
delta=5;    
if(Math.random()>0.5)delta=-5;
 
h=0;    
if(bx>200)h=h+1;
if(bx<300)h=h+1;    
if(by>200)h=h+1;
if(by<300)h=h+1;      
if(dy<0)h=h+1;
if(h==5)dy=-dy;
if(h==5)dx=delta;   
 
 
 
 
 
 
}
 
 
 
function paint(){
 
var sub=new svgpaint();
 
str="<svg width=\"500\" height=\"500\">";
str=str+sub.rect(bx,500-by,10,10,"red");    
str=str+"</svg>";
 
$("#memo").html(str);   
 
}