#include <stdio.h>
#include <stdlib.h>
#include <rand.h>
#include <libps.h>

#include "message.h"

static char* messageptr;
static int messxpos;
static short sinewave;
static u_char messon = 0;

void StartMessage(char* messptr) {

	messageptr = messptr;
	messxpos = 320;
	sinewave = 0;
	messon = 1;

}


void PlotMessage(GsOT* OT) {

	GsSPRITE letterspr;
	int letterno = 0;
	int x = messxpos;
	short sine = sinewave;
	char letter;

	if (messon) {
		InitGsSprite(&letterspr);
		while (x<320 && *(messageptr+letterno)!=0) {
			letterspr.x = x; letterspr.y = 120+(DJsin(sine)>>8);
			letter = *(messageptr+letterno);
			if (letter!=32) {
				CalcLetterPos(&letterspr, letter);
				GsSortFastSprite(&letterspr, OT, 3);
			}
			x+=16; letterno++;
			if ((sine+=256) >= 4096) sine-=4096;
		}
	}

}


u_char Message() {

	u_char retval = 0;
	
	if (messon) {
		if ((messxpos-=2) == -16) {
			if ((sinewave+=256) >= 4096) sinewave-=4096;
			messxpos = 0;
			messageptr++;
			if (*(messageptr)==0) {retval = 1; messon = 0;}
		}
		if ((sinewave+=64) >= 4096) sinewave-=4096;
	}
	
	return retval;

}