def redim(self,nPts,overwrite=True,distribution='sin'):
"""
Redimension and redistribution of airfoil points using cosine function.
More points are located at leading and trailing edge.
Parameters
----------
numPts : integer
number of points for target airfoil. If number of points is same
as source airfoil, points will be redistributed to make smooth
surface
overwrite : bool
If True then self.pts, self.upPts and self.loPts will be
overwritten, otherwise will return array of redimensioned points
in format of self.pts
"""
if nPts%2==0:
nPts1 = nPts/2
nPts2 = nPts/2+1
else:
nPts1 = (nPts+1)/2
nPts2 = nPts1
#nPts *= 0.5
t1 = self._get_point_distribution(nPts1,distribution)
t2 = self._get_point_distribution(nPts2,distribution)
self._create_splines()
xUp, yUp = self._curveUp(t1)
xLo, yLo = self._curveLo(t2)
upPts = np.transpose(np.vstack([xUp,yUp]))
loPts = np.transpose(np.vstack([xLo,yLo]))
coord = geom.join_coordinates(upPts,loPts)
if overwrite:
self.pts = coord
self.ptsUp = upPts
self.ptsLo = loPts
else:
return coord
def _join_coordinates(self):
self.pts = geom.join_coordinates(self.ptsUp, self.ptsLo)