curve.py 文件源码

def from_tck(self, tck, points = None):
    """Change spline parameter and knot structure using a tck object returned by splprep or splrep

    Arguments:
        tck (tuple): t,c,k tuple returned by splprep
        points (int, array or None): optional sample points pecification
    """
    t,c,k = tck;
    self.degree = k;

    # set knots
    self._knots = t[k+1:-k-1];  
    self._knots_all = t;
    self._nparameter = self._knots.shape[0] + k + 1;

    #set parameter
    if isinstance(c, list):
      c = np.vstack(c);
    elif isinstance(c, np.ndarray) and c.ndim == 1:
      c = np.vstack([c]);
    c = c[:,:self._nparameter].T;

    self.ndim = c.shape[1];    
    self._parameter = c[:];

    #set points    
    if points is not None:
      self.set_points(points);

    # values and projection matrix will need to be updated after change of the knots
    self._values = None;
    self._projection = None;
    self._projection_inverse = None;  


  ############################################################################
  ### Spline getter