JS - Item generator controlled by probability

[inusm]

I'm pretty new to JS but I want to make a very basic RPG item generator that is controlled by probability. This is what I have come up with.

I have a problem with the itemtype part. After the probability roll is done for itemtype, I want to randomly generate a group of elements under weapons, accessories, and armors.

It should be something like Rare Sword, Uncommon staff, Common gloves, or Common Chest.

How do I go about this?

[code=javascript]
var rarityNum = Math.floor( 1 + Math.random() * 100 );
var itemNum = Math.floor( 1 + Math.random() * 100 );

var rarity;
if ( rarityNum > 75 ) { rarity = "rare "; }
else if ( rarityNum > 65 ) { rarity = "uncommon "; }
else { rarity = "common "; }

var weapons =["sword","bow"," staff"];
var armors =["chest","leggin gs","gloves"];

var itemtype;
if ( itemNum > 51 ) { itemtype = "weapons"; }
else if ( itemNum > 40 ) { itemtype = "accessorie s"; }
else { itemtype = "armors"; }

document.write (rarity);
document.write (itemtype);
[/code]

[Rabbit]

I'm confused by what your question is because, from the code you have, it looks like you know how to pick an item by probability. Perhaps not in the way I would do it but you're doing it nonetheless.

[Dormilich]

I think the problem is not about choosing, but how to combine each chosen category.

currently what is missing is that you have not chosen which of the weapons/accessories/armors to use.

for that I’d also recomment to couple your data more, instead of using globals (not to mention that document.write( ) will shoot you in the foot sooner than later).

var itemStore = {
  rarity: ["rare", "uncommon", "common"],
  type: {
    weapons: ["sword", "bow", "staff"],
    armors:  ["chest", "leggings", "gloves"],
    accessories: [/* ... */]
};

then you only need to break down the probabilities to indices and you can combine.

// say you have randomly chosen:
// rarity_index  1
// item_type     "weapons"
// item_index    2
var chosenItem = itemStore.rarity[rarity_index] + " " + itemStore[item_type][type_index];

// which would get you: "uncommon staff"