for your information,information: now i can set drop rate but it random to drop item type
1.item drop rate only affect chances(possibility)to drop/get items as kill a creep,normal(base)item drop rate is 100% and 100% does not
mean that for sure(100%) item will drop, for simplicity,the higher the item drop rate,the higher the chance to get/drop item
ps:item drop rate = item drop ratio
2.item quality ratio(not equal to item drop rate or item drop ratio or both) only affect the type(i.e. common-grey color,uncommon-blue,
rare-gold,unique-purple)of item as it drop.I dont know the actual mechanism(calculating formula) of this but for sure the higher the
item quality ratio,the higher the chance(dont confuse with 1.)to get item with higher type(ie uncommon,rare,unique) item quality ratio of 100% means that item drop is 100% common,no chance(0%) to get others type.
3.the chance of item will drop and quality of item drop are only alter(affect)by the increase/decrease of item drop ratio&item quality
ratio of a particular tower which kill(last hit) a creep and try to generate item.in another word,if a tower kill a creep,items
will generate becoz of killing event and the chance of the particular item will drop and the types of items will drop are affected by
the item drop ratio&item quality rate of that kill tower have,and also affected by other towers(not killing)which do buff the creep(
(like ray blaster-add item quality ratio&item drop ratio) and also tower builders(eg,alchemist) and skill of keeper of wisdom.
if can, pls also hack to able to add item quality ratio , thx
info source-http://www.eeve.org/board/viewtopic.php?f=60&t=4012