def simpleSurfBend(path=None,profile=None):
'select the centerline and the O.D. and let it sweep'
curva=FreeCAD.activeDocument().addObject("Part::Feature","CurvaSemplice")
if path==None or profile==None:
curva.Shape=Part.makeSweepSurface(*frameCmd.edges()[:2])
elif path.ShapeType==profile.ShapeType=='Edge':
curva.Shape=Part.makeSweepSurface(path,profile)
def execute(self, fp):
if fp.BendAngle<180:
if fp.thk>fp.OD/2:
fp.thk=fp.OD/2
fp.ID=fp.OD-2*fp.thk
fp.Profile=str(fp.OD)+"x"+str(fp.thk)
CenterOfBend=FreeCAD.Vector(fp.BendRadius,fp.BendRadius,0)
## make center-line ##
R=Part.makeCircle(fp.BendRadius,CenterOfBend,FreeCAD.Vector(0,0,1),225-float(fp.BendAngle)/2,225+float(fp.BendAngle)/2)
## move the cl so that Placement.Base is the center of elbow ##
from math import pi, cos, sqrt
d=(fp.BendRadius*sqrt(2)-fp.BendRadius/cos(fp.BendAngle/180*pi/2))
P=FreeCAD.Vector(-d*cos(pi/4),-d*cos(pi/4),0)
R.translate(P)
## calculate Ports position ##
fp.Ports=[R.valueAt(R.FirstParameter),R.valueAt(R.LastParameter)]
## make the shape of the elbow ##
c=Part.makeCircle(fp.OD/2,fp.Ports[0],R.tangentAt(R.FirstParameter)*-1)
b=Part.makeSweepSurface(R,c)
p1=Part.Face(Part.Wire(c))
p2=Part.Face(Part.Wire(Part.makeCircle(fp.OD/2,fp.Ports[1],R.tangentAt(R.LastParameter))))
sol=Part.Solid(Part.Shell([b,p1,p2]))
planeFaces=[f for f in sol.Faces if type(f.Surface)==Part.Plane]
#elbow=sol.makeThickness(planeFaces,-fp.thk,1.e-3)
#fp.Shape = elbow
if fp.thk<fp.OD/2:
fp.Shape=sol.makeThickness(planeFaces,-fp.thk,1.e-3)
else:
fp.Shape=sol
super(Elbow,self).execute(fp) # perform common operations
def execute(self, fp):
if fp.BendAngle<180:
if fp.thk>fp.OD/2:
fp.thk=fp.OD/2
fp.ID=fp.OD-2*fp.thk
fp.Profile=str(fp.OD)+"x"+str(fp.thk)
CenterOfBend=FreeCAD.Vector(fp.BendRadius,fp.BendRadius,0)
## make center-line ##
R=Part.makeCircle(fp.BendRadius,CenterOfBend,FreeCAD.Vector(0,0,1),225-float(fp.BendAngle)/2,225+float(fp.BendAngle)/2)
## move the cl so that Placement.Base is the center of elbow ##
from math import pi, cos, sqrt
d=(fp.BendRadius*sqrt(2)-fp.BendRadius/cos(fp.BendAngle/180*pi/2))
P=FreeCAD.Vector(-d*cos(pi/4),-d*cos(pi/4),0)
R.translate(P)
## calculate Ports position ##
fp.Ports=[R.valueAt(R.FirstParameter),R.valueAt(R.LastParameter)]
## make the shape of the elbow ##
c=Part.makeCircle(fp.OD/2,fp.Ports[0],R.tangentAt(R.FirstParameter)*-1)
b=Part.makeSweepSurface(R,c)
p1=Part.Face(Part.Wire(c))
p2=Part.Face(Part.Wire(Part.makeCircle(fp.OD/2,fp.Ports[1],R.tangentAt(R.LastParameter))))
sol=Part.Solid(Part.Shell([b,p1,p2]))
planeFaces=[f for f in sol.Faces if type(f.Surface)==Part.Plane]
#elbow=sol.makeThickness(planeFaces,-fp.thk,1.e-3)
#fp.Shape = elbow
if fp.thk<fp.OD/2:
fp.Shape=sol.makeThickness(planeFaces,-fp.thk,1.e-3)
else:
fp.Shape=sol
super(Elbow,self).execute(fp) # perform common operations
def createBentCylinderDoesNotWork(obj, rCirc):
"""Create a cylinder of radius rCirc in x-y plane which is bent in the middle and is streight in the ends.
The little streight part is necessary, because otherwise the part is not displayed
correctly after performing a boolean operations. Thus we need some overlapping
between bent part and the socket.
:param group: Group where to add created objects.
:param rCirc: Radius of the cylinder.
See documentation picture elbow-cacluations.png
"""
# Convert alpha to degree value
dims = Elbow.extractDimensions(obj)
aux = dims.calculateAuxiliararyPoints()
alpha = float(dims.BendAngle.getValueAs("deg"))
rBend = dims.M / 2.0
# Put a base on the streight part.
base = Part.makeCircle(rCirc, aux["p5"], aux["p5"])
# Add trajectory
line1 = Part.makeLine(aux["p5"], aux["p2"])
arc = Part.makeCircle(
rBend, aux["p3"], FreeCAD.Vector(0, 0, 1), 225 - alpha / 2, 225 + alpha / 2)
line2 = Part.makeLine(aux["p4"], aux["p6"])
trajectory = Part.Shape([line1, arc, line2])
# Show trajectory for debugging.
# W Part.Wire([line1, arc, line2])
# Part.show(W)
# Add a cap (circle, at the other end of the bent cylinder).
cap = Part.makeCircle(rCirc, aux["p5"], aux["p5"])
# Sweep the circle along the trajectory.
sweep = Part.makeSweepSurface(trajectory, base) # Does not work
sweep = Part.makeSweepSurface(W, base) # Does not work.
# The sweep is only a 2D service consisting of walls only.
# Add circles on both ends of this wall.
end1 = Part.Face(Part.Wire(base))
# Create other end.
end2 = Part.Face(Part.Wire(cap))
solid = Part.Solid(Part.Shell([end1, sweep, end2]))
return solid
def execute(self, obj):
self.Height = float(obj.Height)
self.BaseRadius = float(obj.BaseRadius)
self.MiddleRadius = float(obj.MiddleRadius)
point1 = App.Vector(self.BaseRadius, 0, 0)
point2 = App.Vector(self.MiddleRadius, 0, self.Height / 2)
point3 = App.Vector(0, 0, self.Height)
Result = None
bsp = Part.BSplineCurve()
bsp.buildFromPoles([point1, point2, point3])
shp = bsp.toShape()
circle = Part.makeCircle(self.BaseRadius, App.Vector(0, 0, 0),
App.Vector(0, 0, 1))
sweep = Part.makeSweepSurface(circle, shp)
base = Part.Face(Part.Wire(circle))
shell1 = Part.Shell([base, sweep])
nResult = Part.makeSolid(shell1)
Result = nResult.removeSplitter()
obj.Shape = Result
def createBentCylinder(obj, rCirc):
"""Create a cylinder of radius rCirc in x-y plane which is bent in the middle.
:param group: Group where to add created objects.
:param rCirc: Radius of the cylinder.
See documentation picture sweep-elbow-cacluations.png.
"""
# Convert alpha to degree value
dims = SweepElbow.extractDimensions(obj)
aux = dims.calculateAuxiliararyPoints()
alpha = float(dims.BendAngle.getValueAs("deg"))
rBend = (aux["p3"] - aux["p5"]).Length
# Put a base on the streight part.
base = Part.makeCircle(rCirc, aux["p5"], aux["p5"])
# Add trajectory
trajectory = Part.makeCircle(rBend, aux["p3"], FreeCAD.Vector(0, 0, 1),
225 - alpha / 2, 225 + alpha / 2)
# Show trajectory for debugging.
# W = W1.fuse([trajectory.Edges])
# Part.Show(W)
# Add a cap (circle, at the other end of the bent cylinder).
cap = Part.makeCircle(rCirc, aux["p6"], aux["p6"])
# Sweep the circle along the trajectory.
sweep = Part.makeSweepSurface(trajectory, base)
# The sweep is only a 2D service consisting of walls only.
# Add circles on both ends of this wall.
end1 = Part.Face(Part.Wire(base))
# Create other end.
end2 = Part.Face(Part.Wire(cap))
solid = Part.Solid(Part.Shell([end1, sweep, end2]))
return solid
