tin_creation_remeshing_strategy.h

// Copyright (c) 2018 Coronis Computing S.L. (Spain)
// All rights reserved.
//
// This file is part of EMODnet Quantized Mesh Generator for Cesium.
//
// 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 3 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, see <https://www.gnu.org/licenses/>.
//
// Author: Ricard Campos (ricardcd@gmail.com)

#ifndef EMODNET_QMGC_TIN_CREATION_REMESHING_H
#define EMODNET_QMGC_TIN_CREATION_REMESHING_H

#include "tin_creator.h"
#include "tin_creation_utils.h"

namespace TinCreation {

class TinCreationRemeshingStrategy : public TinCreationStrategy
{
public:
    TinCreationRemeshingStrategy( double facetDistance,
                                  double facetAngle,
                                  double facetSize,
                                  double edgeSize)
            : m_facetAngle(facetAngle)
    {
        m_facetDistancePerZoom = std::vector<double>{facetDistance};
        m_facetSizePerZoom = std::vector<double>{facetSize};
        m_edgeSizePerZoom = std::vector<double>{edgeSize};
        setParamsForZoom(0);
    }

    TinCreationRemeshingStrategy(const std::vector<double>& facetDistance,
                                 double facetAngle,
                                 const std::vector<double>& facetSize,
                                 const std::vector<double>& edgeSize)
            : m_facetDistancePerZoom(facetDistance)
            , m_facetAngle(facetAngle)
            , m_facetSizePerZoom(facetSize)
            , m_edgeSizePerZoom(edgeSize)
    {
        setParamsForZoom(0);
    }

    Polyhedron create(const std::vector<Point_3>& dataPts,
                      const bool& constrainEasternVertices,
                      const bool& constrainWesternVertices,
                      const bool& constrainNorthernVertices,
                      const bool& constrainSouthernVertices);

    // WARNING: The remeshing strategy should not be used for tiled rendering!
    void setParamsForZoom(const unsigned int& zoom) {
        m_facetDistance = standardHandlingOfThresholdPerZoom(m_facetDistancePerZoom, zoom);
        m_facetSize = standardHandlingOfThresholdPerZoom(m_facetSizePerZoom, zoom);
        m_edgeSize = standardHandlingOfThresholdPerZoom(m_edgeSizePerZoom, zoom);
    }

private:
    // Algorithm parameters
    double m_facetDistance;
    double m_facetAngle;
    double m_facetSize;
    double m_edgeSize;
    std::vector<double> m_facetDistancePerZoom;
    std::vector<double> m_facetSizePerZoom;
    std::vector<double> m_edgeSizePerZoom;

    // Internal functions

    bool dataPtsArePlanar(const std::vector<Point_3>& dataPts) const;

    std::vector<Point_3> defaultPointsForPlanarTile() const;

    Polylines borderPolylineToIndividualEdges(Polyline& poly);
};

} // End namespace TinCreation

#endif //EMODNET_QMGC_TIN_CREATION_REMESHING_H