GLCameraFrustum.h

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//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
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//    (at your option) any later version.
//
//    Scorched3D is distributed in the hope that it will be useful,
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//    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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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#if !defined(AFX_GLCAMERAFRUSTUM_H__4C341296_0589_46D5_BFD7_3114534F7E2D__INCLUDED_)
#define AFX_GLCAMERAFRUSTUM_H__4C341296_0589_46D5_BFD7_3114534F7E2D__INCLUDED_

#include <engine/GameStateI.h>
#include <common/Vector.h>

class GLCameraFrustum : public GameStateI
{
public:
        static GLCameraFrustum *instance();

        static Vector FrustrumRed;
        static Vector FrustrumBlue;
        static Vector FrustrumGreen;
        static Vector FrustrumWhite;

        virtual void draw(const unsigned state);

        bool sphereInFrustum(Vector &point, float fRadius = 1, Vector &color = FrustrumWhite);
        bool sphereInFrustumThreadSafe(Vector &point, float fRadius);
        void backupFrustum();
        void restoreFrustum();
        void drawBilboard(
                Vector &position, Vector &color, float alpha,
                float width, float height, bool additive, int texCoord);

        Vector &getBilboardVectorX();
        Vector &getBilboardVectorY();

        float *getViewMatrix() { return s.fView; }

protected:
        static GLCameraFrustum *instance_;
        struct Settings
        {
                float frustum_[6][4];
                float fProj[16];
                float fView[16];
                float fClip[16];
                float viewport[4];
                float aspect;
        } s, b;

        void normalize(float vector[4]);

private:
        GLCameraFrustum();
        virtual ~GLCameraFrustum();

};

#endif // !defined(AFX_GLCAMERAFRUSTUM_H__4C341296_0589_46D5_BFD7_3114534F7E2D__INCLUDED_)

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