例如,我在一个数组中有 3 个元素:
public function randomTile():Number
{
var tiles:Array = new Array(fire,ice,water);
var index:Number=Math.floor(Math.random()*tiles.length);
return tiles[index];
}
火(70%)、冰(10%)、水(20%)的出现几率怎么设置?
最佳答案
这应该适用于任意数量的元素,您可以指定任何机会值。
var tiles:Array = [
{"item":"fire", "chance":70 },
{"item":"ice", "chance":10 },
{"item":"water","chance":20}
];
var picked:Object = pickRandomByChance(tiles);
trace(picked.item);
public function pickRandomByChance(options:Array):Object
{
var copy:Array = [];
var range:Number = 0;
for (var i:int = 0; i < options.length; i++)
{
copy.push( { "item":options[i].item, "chance":options[i].chance } );
range += copy[i].chance;
if (i > 0)
copy[i].chance += copy[i - 1].chance;
}
var pick:Number = Math.floor(Math.random() * range);
for (i = 0; i < copy.length; i++)
{
if (pick <= copy[i].chance)
return copy[i];
}
return null;
}
关于actionscript-3 - 设置数组中元素出现的机会,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/12114189/