regularsurfacesampler.h

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/*
    toxic - A Global Illumination Renderer
    Copyright (C) 2003-2004 Francois Beaune
    Contact: http://toxicengine.sourceforge.net/

    This file is part of toxic.

    toxic 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.

    toxic 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 toxic; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef TOXIC_RENDERER_REGULARSURFACESAMPLER_H
#define TOXIC_RENDERER_REGULARSURFACESAMPLER_H

#include "common/math/real.h"
#include "globals.h"
#include "isurfacesampler.h"

namespace toxic {

    class Context;

    class RegularSurfaceSampler : public ISurfaceSampler {
    public:
        //! 'w' is the width of the grid (the number of columns).
        //! 'h' is the height of the grid (the number of rows).
        //! The size of the sample vector is w * h.
        RegularSurfaceSampler(int w, int h);

        //! Generates a fresh sample vector.
        virtual void GenerateNewSamples(const Context &context);

    private:
        const int m_w;  //!< Width of the grid.
        const int m_h;  //!< Height of the grid.

        const sheep::Real m_inv_w;  //!< Equals 1.0 / m_w.
        const sheep::Real m_inv_h;  //!< Equals 1.0 / m_h.
    };

#include "regularsurfacesampler.inl"

}

#endif  // !TOXIC_RENDERER_REGULARSURFACESAMPLER_H

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