Frustum.hpp

/*
 * Stellarium Scenery3d Plug-in
 *
 * Copyright (C) 2011-2015 Simon Parzer, Peter Neubauer, Georg Zotti, Andrei Borza, Florian Schaukowitsch
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA  02110-1335, USA.
 */

#ifndef _FRUSTUM_HPP_
#define _FRUSTUM_HPP_

#include <vector>
#include "Plane.hpp"
#include "AABB.hpp"

class Frustum
{
public:
    enum Corner
    {
        NBL = 0, NBR, NTR, NTL,
        FBL, FBR, FTR, FTL,
        CORNERCOUNT
    };

    enum FrustumPlane
    {
        NEARP = 0, FARP,
        LEFT, RIGHT,
        BOTTOM, TOP,
        PLANECOUNT
    };

    enum
    {
        OUTSIDE, INTERSECT, INSIDE
    };

    Frustum();
    ~Frustum();

    void setCamInternals(float fov, float aspect, float zNear, float zFar)
    {
        this->fov = fov;
        this->aspect = aspect;
        this->zNear = zNear;
        this->zFar = zFar;
    }

    void calcFrustum(Vec3d p, Vec3d l, Vec3d u);
    const Vec3f &getCorner(Corner corner) const;
    const Plane &getPlane(FrustumPlane plane) const;
    int pointInFrustum(const Vec3f &p);
    int boxInFrustum(const AABB &bbox);

    void drawFrustum() const;
    void saveDrawingCorners();
    void resetCorners();
    float fov;
    float aspect;
    float zNear;
    float zFar;
    Mat4d m;
    AABB bbox;

    std::vector<Vec3f> drawCorners;
    AABB drawBbox;

    std::vector<Vec3f> corners;
    std::vector<Plane*> planes;

private:


};

#endif