VikingScientist
commented
4 years ago # import just the parts we need
from splipy.io import G2
from splipy import curve_factory
from splipy import surface_factory
from splipy.utils.NACA import NACA
import numpy as np
# let the two first slices be circles
# scale them so they lie in the range x=(0,1)
c1 = curve_factory.circle(r=0.5) + (0.5, 0)
c2 = c1 + (0,0,1)
# create different NACA profiles. Multiplying them scales them,
# while the addition moves them to the right z-coordinate (height)
c3 = 1.0*NACA(2,4,40) + (0,0,2)
c4 = 0.8*NACA(2,4,30) + (0,0,3)
c5 = 0.7*NACA(2,4,20) + (0,0,4)
c6 = 0.5*NACA(2,4,20) + (0,0,5)
c7 = 0.2*NACA(2,4,20) + (0,0,6)
# loft the surface
surf = surface_factory.loft(c1,c2,c3,c4,c5,c6,c7)
# strictly not neccessary, but swapping the parametric directions makes the
# current visualizer point outwards (right-hand rule). Inside is typically dark
surf.swap()
# dump the result in whatever format you fancy. g2 is the GoTools format and
# is accepted by our inhouse visualizer
with G2("out.g2") as f:
f.write(surf)More on the definition of NACA wing profiles: http://airfoiltools.com/airfoil/naca4digit
More on the definition of GoTools (G2) file format: https://github.com/SINTEF-Geometry/GoTools
Visualizer for G2 files: https://github.com/VikingScientist/SplineGUI
VictorAlulema
Dear Andre, Could you provide an example code for the generation of the loft operation you present here: https://github.com/VikingScientist/Splipy/blob/master/images/loft.png https://github.com/VikingScientist/Splipy/blob/master/images/loft.png?raw=true