ｘし８７ - 経済統計練習帳

var ball,bx;
var dy,dx;
var g;
 
function sample() {
 
var sub=new ex();
sub.faststep();
ball=sub.ball;
bx = sub.bx;
dx = sub.dx;
dy=sub.dy;
g=sub.g;
 
 
 
 var timer;
var delay = 100;
 
var loop = function () {
 
    var sub2 = new ex();
    sub2.ball = ball;
    sub2.dy = dy;
    sub2.g = g;
    sub2.bx = bx;
    sub2.dx = dx;
    sub2.move();
    ball = sub2.ball;
    dy = sub2.dy;
    bx = sub2.bx
    dx = sub2.dx;
 
    paint();
 
 
 
 
    clearTimeout(timer);
    timer = setTimeout(loop, delay);
}
 
loop();
 
paint();
 
}   
 
function paint(){
 
var sub=new svgpaint();
 
str="<svg width=\"700\" height=\"700\">";    
str=str+sub.rect(bx,500-ball,5,5,"red");
str=str+"</svg>";
 
$("#memo").html(str);
 
 
}
 
 
 
class ex{
 
ball:number;
dy:number;
dx:number;
g:number;
bx:number;
 
faststep():void{
 
this.ball=500;
this.dy=0;
this.dx=10;
this.g=9.8;
this.bx=250;
 
}
 
move():void{
 
var delta:number;
 
delta=0.1;
 
this.dy=this.dy-delta*this.g;
 
this.ball=this.ball+delta*this.dy;
this.bx=this.bx+delta*this.dx;
 
var h:number;
 
h=0;
if(this.ball<0)h=h+1;
if(this.dy<0)h=h+1;
if(h==2)this.dy=-1*this.dy;
 
h=0;
if(this.bx<0)h=h+1;
if(this.dx<0)h=h+1;
if(h==2)this.dx=-1*this.dx;
 
h=0;
if(this.bx>500)h=h+1;
if(this.dx>0)h=h+1;
if(h==2)this.dx=-1*this.dx;
 
}
 
 
 
}