/***********************************************************************************
 *                                                                                 *
 * Voreen - The Volume Rendering Engine                                            *
 *                                                                                 *
 * Copyright (C) 2005-2012 University of Muenster, Germany.                        *
 * Visualization and Computer Graphics Group <http://viscg.uni-muenster.de>        *
 * For a list of authors please refer to the file "CREDITS.txt".                   *
 *                                                                                 *
 * This file is part of the Voreen software package. Voreen is free software:      *
 * you can redistribute it and/or modify it under the terms of the GNU General     *
 * Public License version 2 as published by the Free Software Foundation.          *
 *                                                                                 *
 * Voreen 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 in the file   *
 * "LICENSE.txt" along with this file. If not, see <http://www.gnu.org/licenses/>. *
 *                                                                                 *
 * For non-commercial academic use see the license exception specified in the file *
 * "LICENSE-academic.txt". To get information about commercial licensing please    *
 * contact the authors.                                                            *
 *                                                                                 *
 ***********************************************************************************/

#ifndef VRN_VOLUMESLICER_H
#define VRN_VOLUMESLICER_H

#include "voreen/core/processors/volumerenderer.h"

#include "voreen/core/properties/floatproperty.h"
#include "voreen/core/properties/transfuncproperty.h"
#include "voreen/core/properties/cameraproperty.h"
#include "voreen/core/properties/intproperty.h"
#include "voreen/core/properties/buttonproperty.h"

namespace voreen {

/**
 * A VolumeRenderer that uses slicing to produce pictures.
 */
class VolumeSlicer : public VolumeRenderer {
public:
    /**
     * Constructor.
     */
    VolumeSlicer();

    virtual ~VolumeSlicer();

    virtual void initialize() throw (tgt::Exception);

protected:

    FloatProperty samplingRate_;
    TransFuncProperty transferFunc_;  ///< the property that controls the transfer-function
    CameraProperty camera_;           ///< the camera used for lighting calculations

    tgt::vec3* cubeVertices_;
    int* nSeq_; // permutation indice°s
    int* v1_; // edge start indices
    int* v2_; // edge end indices

    GeometryPort geometryInport_;
    VolumePort volumeInport_;

    float maxLength_;
    int frontIdx_;
    int backIdx_;
    float sliceDistance_;

    void updateVertices();
    void setupUniforms(tgt::Shader* slicingPrg);

    static const std::string loggerCat_; ///< category used in logging
};

} // namespace voreen

#endif // VRN_VOLUMESLICER_H
