地形生成AS3

Question

我试图通过把一些随机的广场舞台上做了地形，但我不能这样做，这是我的代码。

import flash.display.Sprite; 


var i:Number; 
var h:Number = 0; 
var black:Sprite = new Sprite; 


for (i = 0; i < 600; i++) 
{ 
    if (randon <= 0.5) 
    { 
     i += 40; 
     black.graphics.beginFill(000000); 
     black.graphics.drawRect(i,h,40,40); 
     black.graphics.endFill(); 
     addChild(black); 
    } 

    if (randon>=0.5) 
    { 
     i += 40; 
    } 
} 


var randon:Number; 
randon = Math.random(); 

Answer 1

import flash.display.Sprite; 

var h:Number=0; 
var black:Sprite = new Sprite() ; // missing constructor 
addChild(black); 

for (var i:int=0; i<600; i+=40) // can do definition in here - int is preferred 
{ 
    if (Math.random()<=0.5) // inline 
    { 
     black.graphics.beginFill(000000); 
     black.graphics.drawRect(i,h,40,40); 
     black.graphics.endFill(); 
    } 
}