//===========================================================
//RPG Maker MV Improved Loot System
//使用方法:
//按照以下格式添加到数据库 敌人 的备注栏
//<loot:掉落数[物品1:权重1,物品2:权重2,...]>
//每样物品以 物品类别-物品id:权重 格式添加，物品之间用','分隔
//例如:<loot:2[w-1:3,i-1:2,a-2:5]>
//i:道具 w:武器 a:防具
//author:dukesward
//version: 1.0
//===========================================================
//rpg_objects.js::4267
var Game_Enemy_Alias = Game_Enemy_Alias || {},
ITEM_TYPE_MAPPING = {
'i': 'Items',
'w': 'Weapons',
'a': 'Armors'
};
Array.prototype.removeItem = function(item) {
var temp = [];
for(var i in this) {
if(this.hasOwnProperty(i) && this[i] !== item) temp.push(this[i]);
}
return temp;
};
Game_Enemy_Alias.setup = Game_Enemy.prototype.setup;
Game_Enemy.prototype.setup = function(enemyId, x, y) {
Game_Enemy_Alias.setup.call(this, enemyId, x, y);
//load loot data from enemy metadata
this.processLoot();
}
Game_Enemy.prototype.processLoot = function() {
var loot = this.enemy().meta.loot,
re = /([0-9])\[(.*)\]/,
match = loot ? loot.match(re) : null;
//set number of drop items and drop item list
if(match) {
this._lootNumber = parseInt(match[1]);
this._lootList = match[2].split(',');
}
}
//rpg_objects::4327
Game_Enemy.prototype.makeDropItems = function() {
var list = this._lootList,
dropped = [],
debug = 0;
while(dropped.length < this._lootNumber && list.length > 0) {
var prevRate = 0, temp = [], total = this.calculateTotalRate(list);
var rand = Math.random();
inner:
for(var i in list) {
if(list.hasOwnProperty(i)) {
var tokens = list[i].split(':');
prevRate = temp[1] || 0;
//caculate drop rate for each item in dropitem list
temp = this.calculateDropRate(tokens[1], total, prevRate);
if(this.isDropped(rand, temp)) {
var info = tokens[0].split('-'),
type = info[0] ? ITEM_TYPE_MAPPING[info[0]] : null,
item = info[1] ? window['$data'+type][info[1]] : null;
//add dropped item into dropped, meanwhile remove from list
dropped.push(item);
list = list.removeItem(list[i]);
break inner;
}
}
}
}
return dropped;
}
Game_Enemy.prototype.calculateTotalRate = function(items) {
var total = 0;
//loop through items and add all rates up
for(var i in items) {
if(items.hasOwnProperty(i)) {
var tokens = items[i].split(':'),
rate = parseInt(tokens[1]) || 0;
total += rate;
}
}
return total;
}
Game_Enemy.prototype.calculateDropRate = function(rate, total, prev) {
var temp = prev,
rate = parseInt(rate) || 0,
rateToAdd = Math.round(rate/total*100)/100 + prev;
//the range of drop rate is determined by both current and prev items
return [temp, rateToAdd];
};
Game_Enemy.prototype.isDropped = function(rand, range) {
return rand > range[0] && rand < range[1];
}
挺好的啊，权重计算掉落也是个不错的思路呢。（主要可以多掉落感觉挺不错的），加油