a_shape_circle.h

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/*
         Copyright 2010-2020 Pierre SMARS (smars@yuntech.edu.tw)
         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 2 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 <http://www.gnu.org/licenses/>.
*/
#ifndef _A_SHAPE_CIRCLE_H_
#define _A_SHAPE_CIRCLE_H_
 
// .NAME a_shape_circle
// .SECTION Author
// Pierre Smars
#include "a_shape.h"
 
class a_shape_circle : public a_shape
{
        public:
                a_shape_circle(): a_shape(7) {};
                virtual const std::string classname() const {return "a_shape_circle";}
    static const std::string help();
                a_point closest_point(const a_point p) const;
                double dist_point(const a_point p) const;
                void p3pts(const a_point p1, const a_point p2, const a_point p3); //circle passes through 3 points
                a_point dir() const {return a_point(para_[0],para_[1],para_[2]);}
                a_point orig() const {return a_point(para_[3],para_[4],para_[5]);}
                double radius() const {return para_[6];}
                void dir(const a_point pt) {para_[0] = pt.x(); para_[1] = pt.y(); para_[2] = pt.z();} 
                void orig(const a_point pt) {para_[3] = pt.x(); para_[4] = pt.y(); para_[5] = pt.z();} 
                void radius(double r) {para_[6] = r;} 
                void random_hint(const std::vector<a_point>& pts);
                void fit_cloud(std::vector<a_point>& pts, short nl=1);
                void export_points(const unsigned int nseg, const std::vector<a_point>& pts) const;
                void export_lines(const unsigned int nseg, const std::vector<a_point>& pts) const;
 
        protected:
};
#endif