def helicalextrusion(wire, height, angle):
face_a = Face(wire)
face_b = face_a.copy()
face_transform = App.Matrix()
face_transform.rotateZ(angle)
face_transform.move(App.Vector(0, 0, height))
face_b.transformShape(face_transform)
spine = Wire(Line(fcvec([0., 0, 0]), fcvec([0, 0, height])).toShape())
auxspine = makeHelix(height * 2 * pi / abs(angle), height, 10., 0,
bool(angle < 0))
faces = [face_a, face_b]
pipeshell = BRepOffsetAPI.MakePipeShell(spine)
pipeshell.setSpineSupport(spine)
pipeshell.add(wire)
pipeshell.setAuxiliarySpine(auxspine, True, False)
assert (pipeshell.isReady())
pipeshell.build()
faces.extend(pipeshell.shape().Faces)
fullshell = Shell(faces)
solid = Solid(fullshell)
if solid.Volume < 0:
solid.reverse()
assert (solid.Volume >= 0)
return (solid)
def split_face_with_scales(
face: Part.Face,
scales: list = [.75, .5],
) -> list:
from BOPTools.GeneralFuseResult import GeneralFuseResult
s1 = face.copy().scale(scales[0])
s2 = face.copy().scale(scales[1])
center_of_mass = face.CenterOfMass
tr1 = center_of_mass.sub(s1.CenterOfMass)
s1.Placement.Base = tr1
tr2 = center_of_mass.sub(s2.CenterOfMass)
s2.Placement.Base = tr2
area1 = face.cut(s1)
area2 = s1.cut(s2)
e1, e2 = sorted(face.Edges, key=lambda x: x.Length, reverse=True)[0:2]
v1 = e1.CenterOfMass
v2 = e2.CenterOfMass
poly = Part.makePolygon([v1, center_of_mass, v2])
faces = []
for area in (area1, area2):
pieces, map_ = area.generalFuse([poly])
gr = GeneralFuseResult([area, poly], (pieces, map_))
gr.splitAggregates()
comp = Part.Compound(gr.pieces)
faces.extend(comp.Faces)
faces.append(Part.Face(s2))
return faces
def helicalextrusion(wire, height, angle):
face_a = Face(wire)
face_b = face_a.copy()
face_transform = App.Matrix()
face_transform.rotateZ(angle)
face_transform.move(App.Vector(0,0,height))
face_b . transformShape(face_transform)
step = 2 + int(angle / pi * 4 )
angleinc = angle / (step - 1)
zinc = height / (step-1)
spine = makePolygon([(0, 0, i * zinc) for i in range(step)])
auxspine = makePolygon(
[
(cos(i * angleinc),
sin(i * angleinc),
i * height/(step-1))for i in range(step)
])
faces=[face_a,face_b ]
pipeshell = BRepOffsetAPI.MakePipeShell(spine)
pipeshell.setSpineSupport(spine)
pipeshell.add(wire)
pipeshell.setAuxiliarySpine(auxspine,True,False)
assert(pipeshell.isReady())
pipeshell.build()
faces.extend(pipeshell.shape().Faces)
fullshell = Shell(faces)
solid = Solid(fullshell)
if solid.Volume < 0:
solid.reverse()
assert(solid.Volume >= 0)
return(solid)
def helicalextrusion(wire, height, angle):
face_a = Face(wire)
face_b = face_a.copy()
face_transform = App.Matrix()
face_transform.rotateZ(angle)
face_transform.move(App.Vector(0, 0, height))
face_b . transformShape(face_transform)
spine = Wire(Line(fcvec([0., 0, 0]), fcvec([0, 0, height])).toShape())
auxspine = makeHelix(height * 2 * pi / angle, height, 1.)
faces = [face_a, face_b]
pipeshell = BRepOffsetAPI.MakePipeShell(spine)
pipeshell.setSpineSupport(spine)
pipeshell.add(wire)
pipeshell.setAuxiliarySpine(auxspine, True, False)
assert(pipeshell.isReady())
pipeshell.build()
faces.extend(pipeshell.shape().Faces)
fullshell = Shell(faces)
solid = Solid(fullshell)
if solid.Volume < 0:
solid.reverse()
assert(solid.Volume >= 0)
return(solid)
def execute(self,fp):
b = fp.pin_circle_radius
d = fp.roller_diameter
e = fp.eccentricity
n = fp.teeth_number
p = b/n
s = fp.segment_count
ang = fp.pressure_angle_lim
c = fp.pressure_angle_offset
q = 2*math.pi/float(s)
# Find the pressure angle limit circles
minAngle = -1.0
maxAngle = -1.0
for i in range(0, 180):
x = self.calc_pressure_angle(p, d, n, i * math.pi / 180.)
if ( x < ang) and (minAngle < 0):
minAngle = float(i)
if (x < -ang) and (maxAngle < 0):
maxAngle = float(i-1)
minRadius = self.calc_pressure_limit(p, d, e, n, minAngle * math.pi / 180.)
maxRadius = self.calc_pressure_limit(p, d, e, n, maxAngle * math.pi / 180.)
# unused
# Wire(Part.makeCircle(minRadius,App.Vector(-e, 0, 0)))
# Wire(Part.makeCircle(maxRadius,App.Vector(-e, 0, 0)))
App.Console.PrintMessage("Generating cam disk\r\n")
#generate the cam profile - note: shifted in -x by eccentricicy amount
i=0
x = self.calc_x(p, d, e, n, q*i / float(n))
y = self.calc_y(p, d, e, n, q*i / n)
x, y = self.check_limit(x,y,maxRadius,minRadius,c)
points = [App.Vector(x-e, y, 0)]
for i in range(0,s):
x = self.calc_x(p, d, e, n, q*(i+1) / n)
y = self.calc_y(p, d, e, n, q*(i+1) / n)
x, y = self.check_limit(x, y, maxRadius, minRadius, c)
points.append([x-e, y, 0])
wi = make_bspline_wire([points])
wires = []
mat= App.Matrix()
mat.move(App.Vector(e, 0., 0.))
mat.rotateZ(2 * np.pi / n)
mat.move(App.Vector(-e, 0., 0.))
for _ in range(n):
wi = wi.transformGeometry(mat)
wires.append(wi)
cam = Face(Wire(wires))
#add a circle in the center of the cam
if fp.hole_radius.Value:
centerCircle = Face(Wire(Part.makeCircle(fp.hole_radius.Value, App.Vector(-e, 0, 0))))
cam = cam.cut(centerCircle)
to_be_fused = []
if fp.show_disk0==True:
if fp.disk_height.Value==0:
to_be_fused.append(cam)
else:
to_be_fused.append(cam.extrude(App.Vector(0, 0, fp.disk_height.Value)))
#secondary cam disk
if fp.show_disk1==True:
App.Console.PrintMessage("Generating secondary cam disk\r\n")
second_cam = cam.copy()
mat= App.Matrix()
mat.rotateZ(np.pi)
mat.move(App.Vector(-e, 0, 0))
if n%2 == 0:
mat.rotateZ(np.pi/n)
mat.move(App.Vector(e, 0, 0))
second_cam = second_cam.transformGeometry(mat)
if fp.disk_height.Value==0:
to_be_fused.append(second_cam)
else:
to_be_fused.append(second_cam.extrude(App.Vector(0, 0, -fp.disk_height.Value)))
#pins
if fp.show_pins==True:
App.Console.PrintMessage("Generating pins\r\n")
pins = []
for i in range(0, n + 1):
x = p * n * math.cos(2 * math.pi / (n + 1) * i)
y = p * n * math.sin(2 * math.pi / (n + 1) * i)
pins.append(Wire(Part.makeCircle(d / 2, App.Vector(x, y, 0))))
pins = Face(pins)
z_offset = -fp.pin_height.Value / 2;
if fp.center_pins==True:
if fp.show_disk0==True and fp.show_disk1==False:
z_offset += fp.disk_height.Value / 2;
elif fp.show_disk0==False and fp.show_disk1==True:
z_offset += -fp.disk_height.Value / 2;
#extrude
if z_offset!=0:
pins.translate(App.Vector(0, 0, z_offset))
if fp.pin_height!=0:
pins = pins.extrude(App.Vector(0, 0, fp.pin_height.Value))
to_be_fused.append(pins);
if to_be_fused:
fp.Shape = Part.makeCompound(to_be_fused)
