SKID'S PROFILE

author=coelocanth
Skid, you want to use the "code" forum tag to quote code blocks (4th icon from the right,

).

To answer your question, $gameVariables is a global that is defined by one of the engine scripts. So you can reference it from any plugin (also the javascript console for debugging - press F8 or F12 in test mode).

All the core scripts are in the js folder with names starting with rpg_ for the game systems part.
Normally you want to override (patch / alias) the core classes with a plugin script rather than editing the original. But you will want to *read* the original scripts when writing plugins.

The way to patch objects in javascript is simply to set the member name to a new function.

Scene_Shop.prototype.sellingPrice = function() {
    return this._buyWindow.price(this._item);
};

Often you want to preserve the original function to base call it, you do that by assigning to a local variable

var MYPLUGIN_Scene_Shop_sellingPrice = Scene_Shop.prototype.sellingPrice;

Scene_Shop.prototype.sellingPrice = function() {

    return MYPLUGIN_Scene_Shop_sellingPrice.call(this) * 2;

};

If you look at the source of existing plugins, you'll find lots of variations on the above.

The code you were asking about looks like a replacement for the shop processing event command from the 4th post.

So you'd need to patch Game_Interpreter.prototype.command302 with your own version.

 var goods = [     

[ 0, 4, 1, $gameVariables.value(0001) ],     

[ 0, 3, 1, 10 ] ]  



SceneManager.push(Scene_Shop); 

SceneManager.prepareNextScene(goods, false);]