//!Collision-detection function collection
/*!
 * Collision-detection function collection
 * Provides intersection tests for several common cases
 */
/*
 * Copyright (C) 2006-2010  Alejandro Valenzuela Roca, <lanjoe9 at mexinetica dot com>
 *
 * This file is part of MotorJ, a free framework for videogame development.
 * <http://wiki.lidsol.net/wiki/index.php?title=MotorJ >
 * <http://motorj.mexinetica.com/ >
 *
 * MotorJ is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MotorJ 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with MotorJ.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Real-Time Rendering by Tomas Akenine-Möller and Eric Haines was used as
 * a reference to implement some of the algorithms.
 *
 */


/*
 * "Pixel por Pixel, polígono por polígono"
 *  - Colisión por el bien de todos
 *
 */

#ifndef COLLISIONS_H
#define COLLISIONS_H


 #include <math.h>

#ifndef NINTENDO_DS
#ifndef NINTENDO_WII

#ifdef VISUAL_STUDIO
#include <windows.h>
#endif

 #include <GL/gl.h>
 #include "lanjobot.h"
#endif
#else
 #include <nds.h>
#endif

 #include "support.h"



#define AACIL_TOL 0.1

#define COLR_NOCOLLISION  0
#define COLR_OUTSIDE		 0
#define COLR_OVERLAP		 1
#define COLR_EXACT		 1
// col_ray_tr  return values:
#define COLR_OVER		 2
#define COLR_UNDER		 3

//! Axis-aligned box vs Axis-aligned box collision test
short col_aabb_aabb(vector3 & a_min, vector3 & a_max,
		  vector3 & b_min, vector3 & b_max);

//! Axis-aligned box vs point collision test
short col_aabb_pt(vector3 & a_min, vector3 & a_max, vector3 & pt);

//! Oriented bounding box vs oriented bounding box collision test
short col_obb_obb(obb & a, obb & b);

//! Sphere-on-sphere collision test
short col_sph_sph(vector3 sphcen0, float r0,
		  vector3 sphcen1, float r1, vector3 * sph0_sph1);

//! Ray vs triangle collision test
short col_ray_tr(vector3 & ray_origin, vector3 * ray_dir, triangle & tr, vector3 * correction);

//! Point vs axis-aligned cylinder collision test
short col_pt_aacyl(vector3 & point, vector3 & cyl_base, float cyl_height, float cyl_radius, vector3 * correction);

//! Ray vs sphere collision test
short col_ray_sph(vector3 & ray_origin, vector3 & ray_dir, vector3 sphcen, float r, vector3* correctionArray);

short col_tr_aabb( triangle & tr, vector3 & a_min, vector3 & a_max);

#endif