/*-
 * Copyright (C) 2025  Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it>
 *
 * This file is part of Tris Game.
 *
 * Tris Game is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Tris Game is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Tris Game.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <GL/gl.h>
#include "../ui/ui.h"

#define RANGE_GL 2.0f

static float xstep;
static float ystep;
static int width;
static int height;

void
engine_init(int w, int h)
{
	width = w;
	height = h;
	ui_init(w, h);

	xstep = RANGE_GL / (float) w;
	ystep = RANGE_GL / (float) h;
}

void
engine_draw_line(int x1, int y1, int x2, int y2)
{
	float _x1 = x1 * xstep - 1; float _y1 = (height - y1) * ystep - 1;
	float _x2 = x2 * xstep - 1; float _y2 = (height - y2) * ystep - 1;

	glVertex2f(_x1, _y1);
	glVertex2f(_x2, _y2);
}