/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
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 * permit persons to whom the Software is furnished to do so, subject to the following   *
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 * or substantial portions of the Software.                                              *
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#ifndef __OPENSPACE_MODULE_MULTIRESVOLUME___SHENBRICKSELECTOR___H__
#define __OPENSPACE_MODULE_MULTIRESVOLUME___SHENBRICKSELECTOR___H__

#include <modules/multiresvolume/rendering/brickselector.h>

#include <modules/multiresvolume/rendering/brickcover.h>
#include <vector>

namespace openspace {

class TSP;

class ShenBrickSelector : public BrickSelector {
public:
    ShenBrickSelector(TSP* tsp, float spatialTolerance, float temporalTolerance);
    ~ShenBrickSelector() = default;
    void setSpatialTolerance(float spatialTolerance);
    void setTemporalTolerance(float temporalTolerance);
    void selectBricks(int timestep, std::vector<int>& bricks) override;

private:
    TSP* _tsp;
    float _spatialTolerance;
    float _temporalTolerance;

    void traverseOT(int timestep, unsigned int brickIndex, BrickCover coveredBricks,
        std::vector<int>& bricks);

    void traverseBST(int timestep, unsigned int brickIndex,
        unsigned int bstRootBrickIndex, int timeSpanStart, int timeSpanEnd,
        BrickCover coveredBricks, std::vector<int>& bricks);

    void selectBricks(int timestep, unsigned int brickIndex,
        unsigned int bstRootBrickIndex, int timeSpanStart, int timeSpanEnd,
        BrickCover coveredBricks, std::vector<int>& bricks);

    int linearCoords(int x, int y, int z) const;

    void selectCover(BrickCover coveredBricks, unsigned int brickIndex,
        std::vector<int>& bricks) const;
};

} // namespace openspace

#endif // __OPENSPACE_MODULE_MULTIRESVOLUME___SHENBRICKSELECTOR___H__
