6 replies to this topic

[heatedflame]

Could someone enlighten me on this: I've been thinking about how items are identified in MMORPGs. Take for example, there's a sword with Weapon Power (WP) ranging from 1 to 3.

The scenario: Unique IDs for the different WPs of the sword, but same IDs for a specific WP of a sword.
i.e. Sword WP 1 : id=0000
Sword WP 2: id=0001
Sword WP 3: id=0002

Whenever a 'Sword WP 1' is dropped from a monster, the id of the item is always fixed no matter who obtains it. Or is it the case where any new item that will have a new ID (since trading the item between players would be quite confusing)? A brief and rough idea would help a lot!

Edited by heatedflame, 18 February 2012 - 01:39 PM.

[chaz13]

I'd keep it all handled by local variables. Pick up a sword, you delete the object and the player or whatevers) WP variable now ='s that of the sword, when you drop it you create a sword object with the right stats again. Simples!

[heatedflame]

Getting confused. I'm fine with affixing a specific WP to a sword. But how to identify two similar swords of a same WP?

i.e. 1st item dropped = Sword WP 1
2nd item dropped = Sword WP 1

What I thought of was giving different IDs to each item to avoid conflicts if players were to trade items with same WP. But is that realistic/practical? Really curious how items MMORPGs (or games with inventories) work.

[Zesterer]

Who cares if they get mixed up? They are identical anyway!

[heatedflame]

Who cares if they get mixed up? They are identical anyway!

I guess that settles the part of items having the same IDs. So I would assume that there are two instances of an object if there were two swords with the same WP?

That aside, another thing boggled my mind. How about randomizing a number for the WP? Something like:

var sword_wp //resulting fixed value (WP) of the sword
sword wp = 0

var sword_wp_roll; //to randomize the value (WP) of the sword
sword_wp_roll = irandom(3) + 1

...

How to 'attach/affix' the randomized number such that it has become fixed to the object (like when object is dropped/picked up)? My thought was to randomize var_sword_wp_roll then attach it to var sword_wp.

[Yal]

var is used for temporary variables, first of all! To use a normal variable, just assign a value to it.

You should investigate Disgaea's item system. Much like characters, each item has all the stats in the game: HP, SP, ATK, DEF, INT, RES, HIT, SPD, MOV, JMP, THW, ETC... When you equip an item, the character basically gets all the item's stats added to his own stats. Also, you can level up items to raise its stats there.

Implementation-wise, you could use a 2-D array for all items in your possesion and have inventory spots on one axis and item stats for the item on that spot on the other axis.

[Mayhem Games]

If you are serious in learning the in and out's of a MMORPG, before starting I recommend you looking at Trinity Core. TC is a World of Warcraft server written in c++. It is interesting to see how a big MMO such as WoW works.