picker_point_cloud.h

/********************************************************************
 * Copyright (C) 2015 Liangliang Nan <liangliang.nan@gmail.com>
 * https://3d.bk.tudelft.nl/liangliang/
 *
 * This file is part of Easy3D. If it is useful in your research/work,
 * I would be grateful if you show your appreciation by citing it:
 * ------------------------------------------------------------------
 *      Liangliang Nan.
 *      Easy3D: a lightweight, easy-to-use, and efficient C++ library
 *      for processing and rendering 3D data.
 *      Journal of Open Source Software, 6(64), 3255, 2021.
 * ------------------------------------------------------------------
 *
 * Easy3D is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 3
 * as published by the Free Software Foundation.
 *
 * Easy3D 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 <http://www.gnu.org/licenses/>.
 ********************************************************************/
 
#ifndef EASY3D_GUI_PICKER_POINT_CLOUD_H
#define EASY3D_GUI_PICKER_POINT_CLOUD_H
 
 
#include <easy3d/gui/picker.h>
#include <easy3d/core/point_cloud.h>
 
 
namespace easy3d {
 
    class ShaderProgram;

    class PointCloudPicker : public Picker {
    public:
        explicit PointCloudPicker(const Camera *cam);

        unsigned int resolution() const { return hit_resolution_; }

        void set_resolution(unsigned int r) { hit_resolution_ = r; }

        PointCloud::Vertex pick_vertex(PointCloud *model, int x, int y);

        void pick_vertices(PointCloud *model, const Rect& rect, bool deselect);

        void pick_vertices(PointCloud *model, const Polygon2 &plg, bool deselect);
 
    private:
        // pick implemented in CPU (with OpenMP if supported)
        PointCloud::Vertex pick_vertex_cpu(PointCloud *model, int x, int y);
 
        // pick plain points implemented in GPU (using shader program)
        PointCloud::Vertex pick_vertex_gpu_plain(PointCloud *model, int x, int y);
 
        // pick sphere points implemented in GPU (using shader program)
        PointCloud::Vertex pick_vertex_gpu_sphere(PointCloud *model, int x, int y);
 
    private:
        unsigned int hit_resolution_;     // in pixels
        ShaderProgram*  program_;
    };
 
}
 
#endif // EASY3D_GUI_PICKER_POINT_CLOUD_H