Ring System

int GameVars[65536];

const int RING_COUNT			= 53;//How many rings you have
const int RING_SET				= 54;//What ring is equipped
const int RING_TILE				= 1000;//First index to store ring tiles
const int RING_CSET				= 1010;//First index to store ring Csets
const int RING_OBTAINED			= 1020;//Frist index to store ring ids

const int NUM_RINGS		= 9;//Max number of rings you can get.
							//Due to how things work in arrays, this is one less than actual max
const int RING_MESSAGE 	= 507;//First of ten messages describing rings

void RingSystem(){
	int ring_set = GameVars[RING_SET];//Save what ring is equipped
	int old_ring= GameVars[RING_OBTAINED+ring_set];//Save item id of ring
	int ring= old_ring;//Store separately for later comparison
	int RingMessage[]= "Press left or right to change equipped ring";//It's a string!
    //You have a ring
	if(GameVars[RING_COUNT]){
		int Message[256];//Buffer for loading messages
		int string;//Message to load
		//You press right
		if(Link->PressRight){
			//Damp inputs
			Link->PressRight= false;
			Link->InputRight= false;
			//Cycle through all indices
			do{
				ring_set++;
				if(ring_set==NUM_RINGS+1)//You've reached the end of the available indices
					ring_set=0;//Set back to start
			}
			while(!GameVars[RING_OBTAINED+ring_set])
			//Reset ring id to new value
			ring= GameVars[RING_OBTAINED+ring_set];
			Game->PlaySound(SFX_MENU_SELECT);
		}
		//You press left
		else if(Link->PressLeft){
			Link->PressLeft= false;
			Link->InputLeft= false;
			do{
				ring_set--;
				if(ring_set==-1)//If you go below zero
					ring_set=NUM_RINGS;//Set to max ring
			}
			while(!GameVars[RING_OBTAINED+ring_set])
			ring= GameVars[RING_OBTAINED+ring_set];
			Game->PlaySound(SFX_MENU_SELECT);
		}
		//The ring id has changed
		if(ring!=old_ring){
			//Take away old ring
			Link->Item[old_ring]= false;
			//Give new ring
			Link->Item[ring]= true;
		}
		//Determine what index to point to
		GameVars[RING_SET]= ring_set;
		//Determine what message to point to
		string= RING_MESSAGE+ring_set;
		//Load message into buffer
		GetMessage(string, Message);
		//You have assigned a ring
		if(GameVars[RING_SET]!=-1){
			//Draw decscription of ring
			Screen->DrawString(1,24,4,FONT_GBLA,0x08,0x69,TF_NORMAL,Message,128);
			//Draw tile of ring
			Screen->FastTile(1,28,19,GameVars[RING_TILE+ring_set],
							GameVars[RING_CSET+ring_set],OP_OPAQUE);
		}
		//You have more than one ring
		if(GameVars[RING_COUNT]>=2)
			//Display a string
			Screen->DrawString(1,8,136,FONT_GBLA,0x08,0x69,TF_NORMAL,RingMessage,128);
	}
}

//D0- Message to show
//D1- Index of array to store data
//	  0-Number of Rings
//D2- Tile of ring
//D3- CSet of ring
//D4- Item id of ring

item script Ring_Item{
	void run(int message, int ring, int tile, int cset,int ring_id){
		GameVars[RING_OBTAINED+ring]= ring_id;
		GameVars[RING_TILE+ring]= tile;
		GameVars[RING_CSET+ring]= cset;
		GameVars[RING_COUNT]++;
		GameVars[RING_SET]= ring;
		Screen->Message(message);
	}
}