def FuselageOML(NoseLengthRatio=0.182,
TailLengthRatio=0.293,
Scaling=[55.902, 55.902, 55.902],
NoseCoordinates=[0, 0, 0],
CylindricalMidSection=False,
SimplificationReqd=False):
# Instantiates a parametric fuselage outer mould line (OML) geometry for a given
# set of design variables.
FuselageOMLSurf, SternPoint = _BuildFuselageOML(NoseLengthRatio,
TailLengthRatio,
CylindricalMidSection,
SimplificationReqd)
if not (FuselageOMLSurf) or FuselageOMLSurf is None:
return
ScalingF = [0, 0, 0]
ScalingF[0] = Scaling[0] / 55.902
ScalingF[1] = Scaling[1] / 55.902
ScalingF[2] = Scaling[2] / 55.902
# Overall scaling
FuselageOMLSurf = act.ScaleObjectWorld000(FuselageOMLSurf, ScalingF)
# A few other ways of performing the scaling...
# Variant one: this depends on the current CPlane!
# FuselageOMLSurf = rs.ScaleObject(FuselageOMLSurf, (0,0,0), Scaling)
# Variant two: define plane in World coordinates
#P = rs.PlaneFromFrame((0,0,0),(1,0,0),(0,1,0))
#TransfMatrix = Rhino.Geometry.Transform.Scale(P, Scaling[0], Scaling[1], Scaling[2])
#FuselageOMLSurf = rs.TransformObjects(FuselageOMLSurf, TransfMatrix)
# Variant three: World coordinate system based scaling
#xform = rs.XformScale(Scaling)
#FuselageOMLSurf = rs.TransformObjects(FuselageOMLSurf, xform)
SternPoint[0] = SternPoint[0] * ScalingF[0]
SternPoint[1] = SternPoint[1] * ScalingF[1]
SternPoint[2] = SternPoint[2] * ScalingF[2]
# Positioning
MoveVec = rs.VectorCreate(NoseCoordinates, [0, 0, 0])
FuselageOMLSurf = rs.MoveObject(FuselageOMLSurf, MoveVec)
SternPoint[0] = SternPoint[0] + NoseCoordinates[0]
SternPoint[1] = SternPoint[1] + NoseCoordinates[1]
SternPoint[2] = SternPoint[2] + NoseCoordinates[2]
return FuselageOMLSurf, SternPoint
def _TransformAirfoil(self, C):
# Internal function. Given a normal airfoil, unit chord, nose in origin,
# chord along x axis, applies scaling, rotations, positioning and smoothing
# Smoothing
for i in range(1, self.SmoothingIterations + 1):
rs.FairCurve(C)
# Find the actual leading edge point - the airfoil may have stretched as
# as a result of the smoothing or it may have been incorrectly defined
# through a series of coordinates
RefLine = rs.AddLine((-100, 0, -100), (-100, 0, 100))
ClosestPoints = rs.CurveClosestObject(RefLine, C)
P = rs.AddPoint(ClosestPoints[1])
MoveVec = rs.VectorCreate((0, 0, 0), P)
rs.MoveObject(C, MoveVec)
# Garbage collection
rs.DeleteObjects((RefLine, P))
# Now find the trailing edge points
PUpper = rs.CurveStartPoint(C)
PLower = rs.CurveEndPoint(C)
TECentre = ((PUpper[0] + PLower[0]) / 2, (PUpper[1] + PLower[1]) / 2,
(PUpper[2] + PLower[2]) / 2)
if PUpper[2] < PLower[2]:
print "Warning: the upper and lower surface intersect at the TE."
TECentrePoint = rs.AddPoint(TECentre)
AxisOfRotation = rs.VectorCreate((0, 0, 0), (0, 1, 0))
L1 = rs.AddLine((0, 0, 0), (1, 0, 0))
L2 = rs.AddLine((0, 0, 0), TECentrePoint)
AngRot = rs.Angle2(L1, L2)
# The angle returned by Angle2 is always positive so:
if TECentre[2] < 0:
rs.RotateObject(C, (0, 0, 0), AngRot[0], AxisOfRotation)
else:
rs.RotateObject(C, (0, 0, 0), -AngRot[0], AxisOfRotation)
# Garbage collection
rs.DeleteObjects((TECentrePoint, L1, L2))
# Find the trailing edge point again after rotating it onto the x axis
PUpper = rs.CurveStartPoint(C)
PLower = rs.CurveEndPoint(C)
TECentre = [(PUpper[0] + PLower[0]) / 2, (PUpper[1] + PLower[1]) / 2,
(PUpper[2] + PLower[2]) / 2]
ActualChordLength = TECentre[0]
# Scale the airfoil to unit chord
#rs.ScaleObject(C, (0,0,0), (1/ActualChordLength, 1, 1/ActualChordLength))
act.ScaleObjectWorld000(
C, (1 / ActualChordLength, 1, 1 / ActualChordLength))
# Now we can assume that airfoil is normalised to the unit chord, with
# its leading edge in the origin, trailing edge in (1,0,0)
Chrd = rs.AddLine((0, 0, 0), (1, 0, 0))
# Scaling
ScaleFact = (self.ChordLength, self.ChordLength, self.ChordLength)
# same as rs.ScaleObject(C, (0,0,0), ScaleFact)
act.ScaleObjectWorld000(C, ScaleFact)
# same as rs.ScaleObject(Chrd, (0,0,0), ScaleFact)
act.ScaleObjectWorld000(Chrd, ScaleFact)
# Twist
rs.RotateObject(C, (0, 0, 0), self.Twist,
rs.VectorCreate((0, 0, 0), (0, 1, 0)))
rs.RotateObject(Chrd, (0, 0, 0), self.Twist,
rs.VectorCreate((0, 0, 0), (0, 1, 0)))
# Dihedral
rs.RotateObject(C, (0, 0, 0), -self.Rotation,
rs.VectorCreate((0, 0, 0), (1, 0, 0)))
rs.RotateObject(Chrd, (0, 0, 0), -self.Rotation,
rs.VectorCreate((0, 0, 0), (1, 0, 0)))
# 3d positioning
MoveVec = rs.VectorCreate(self.LeadingEdgePoint, (0, 0, 0))
rs.MoveObject(C, MoveVec)
rs.MoveObject(Chrd, MoveVec)
return C, Chrd
