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BSplineCurve.h
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BSplineCurve.h
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// This file is part of NURBS, a simple NURBS library.
// github repo: https://github.com/aijm/NURBS
// Copyright (C) 2018 Jiaming Ai <[email protected]>
#ifndef BSPLINECURVE_H
#define BSPLINECURVE_H
#include <igl/opengl/glfw/Viewer.h>
using namespace Eigen;
using namespace std;
struct BSplineCurve
{
/*input format:
_n : P_0,P_1,...,P_n; _n is the final index
_k : order of BSpline
_controlP: P_0,P_1,...,P_n; (n+1) by 2 or 3
_knots : t_0,t_1,...,t_(n+k); */
BSplineCurve(int _n, int _k, MatrixXd _controlP, vector<double> _knots);
// find the knot interval of t by binary searching
int find_ind(double t);
// evaluate the coordinate of curvePoint with parameter t
MatrixXd eval(double t);
// display by libigl
void show(igl::opengl::glfw::Viewer& viewer, double resolution = 0.01);
int n; // P_0,P_1,...,P_n; _n is the final index
int k; // order of BSpline
vector<double> knots;
MatrixXd controlP;
};
#endif // !BSPLINECURVE_H