Spline.h

/******************************************************************************\

  CAMotics is an Open-Source simulation and CAM software.
  Copyright (C) 2011-2019 Joseph Coffland <joseph@cauldrondevelopment.com>

  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/>.

\******************************************************************************/

#pragma once


#include "Entity.h"

#include <vector>

namespace DXF {
  class Spline : public Entity {
    unsigned degree;
    /* Spline flag (bit coded):
     * 1 = Closed spline
     * 2 = Periodic spline
     * 4 = Rational spline
     * 8 = Planar
     * 16 = Linear (planar bit is also set)
     */
    unsigned flags;
    std::vector<cb::Vector3D> ctrlPts;
    std::vector<double> weights;
    std::vector<double> knots;

  public:
    Spline(unsigned degree, unsigned flags) : degree(degree), flags(flags) {}

    unsigned getDegree() const {return degree;}
    unsigned getFlags() const {return flags;}
    const std::vector<cb::Vector3D> &getControlPoints() const {return ctrlPts;}
    const std::vector<double> &getWeights() const {return weights;}
    const std::vector<double> &getKnots() const {return knots;}

    // From Entity
    void addKnot(double k) {knots.push_back(k);}
    void addVertex(const cb::Vector3D &v, double weight = 1.0) {ctrlPts.push_back(v); weights.push_back(weight);}
    type_t getType() const {return DXF_SPLINE;}
  };
}