//! GLU Picker
/*!
 * A class to perform picking in a (hopefully) easier manner
 * Instructions:
 *
 * 1) Use glLoadName with a different number when rendering each "pickable" object
 *
 * 2) Use picker's PerformPicking() in ProcessEvent method. The returned object will be the closest
 *
 * 3) If you want you can look at App.currentlyPicking in your Redraw method
 * (e.g. to simplify graphics, not draw ignored objects, etc. when in picking mode)
 *
 *
 * Based in a great tutorial by gpWiki: http://gpwiki.org/index.php/OpenGL:Tutorials:Picking
 *
 */
/*
 * Copyright (C) 2010  Alejandro Valenzuela Roca, <lanjoe9 at mexinetica NOSPAMPLEASE dot com>, http://lj9.mexinetica.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/>.
 */

#ifndef PICKER_CLASS_H
#define PICKER_CLASS_H

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

#include <GL/gl.h>
#include <GL/glu.h>
#include "universe-class.h"
#include "app.h"

#define MJ_SEL_BUFF_SIZE 256


class mjPicker
{
public:
	mjPicker();
	mjPicker(GLuint bufferSize);
	~mjPicker();
	void SetBufferSize(GLuint bufferSize);

	int PerformPicking(GLfloat x, GLfloat y);
	GLfloat pickingMatrix[16];

	float selRadius;
	GLuint* selBuffer;
	GLuint selHits;
	GLuint bufferSize;


};


#endif