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 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 _fuse_nut_ramps_to_bracket(bracket: Part.Solid, thickness: float,
set_screw_cutout_length: float,
set_screw_cutout_width: float,
ramp_height: float) -> Part.Solid:
"""Fuse nut ramps to bracket so nut doesn't spin when tightening screw.
::
|\
| \
|__\
:param bracket: Bracket
:param thickness: Thickness
:param set_screw_cutout_length: Length of set screw cutout
:param set_screw_cutout_width: Width of set screw cutout
:param ramp_height: Height of ramp.
"""
ramp_length = set_screw_cutout_length / 2.0
ramp_angle = (180 - 120) / 2 # Hexagonal nuts have 120 degree angles
# opposite = tan(theta) * adjacent (toa in soh-cah-toa rule)
height = tan(radians(ramp_angle)) * ramp_length
# Right Triangle
bottom_left = Vector(0, 0, 0)
top_left = Vector(0, 0, height)
bottom_right = Vector(ramp_length, 0, 0)
vectors = [bottom_left, top_left, bottom_right]
face = make_face_from_vectors(vectors)
rotation = 45
left_ramp = face.extrude(Vector(0, set_screw_cutout_width, 0))
right_ramp = left_ramp.copy()
left_ramp.rotate(Vector(0, 0, 0), Vector(0, 0, -1), rotation)
right_ramp.rotate(Vector(0, 0, 0), Vector(0, 0, -1), 180 + rotation)
cutout_length_offset = set_screw_cutout_length * cos(radians(rotation))
left_ramp.translate(
Vector(thickness * 2, (thickness * 2) + cutout_length_offset,
ramp_height))
cutout_width_offset = set_screw_cutout_width * cos(radians(rotation))
right_ramp.translate(
Vector((thickness * 2) + cutout_length_offset + cutout_width_offset,
(thickness * 2) + cutout_width_offset, ramp_height))
bracket = bracket.fuse(left_ramp)
return bracket.fuse(right_ramp)
def execute1(self, fp):
fp.gear.z = fp.teeth
fp.gear.pressure_angle = fp.pressure_angle.Value * pi / 180.
fp.gear.pitch_angle = fp.pitch_angle.Value * pi / 180
fp.gear.backlash = fp.backlash
fp.gear._update()
pts = fp.gear.points(num=fp.numpoints)
tooth = self.create_tooth()
teeth = [tooth]
rot = App.Matrix()
rot.rotateZ(2 * pi / fp.teeth)
top_cap = [i.Edges[0] for i in tooth.Faces]
bottom_cap = [i.Edges[3] for i in tooth.Faces]
for i in range(fp.teeth - 1):
new_tooth = teeth[-1].transformGeometry(rot)
edge1 = new_tooth.Faces[0].Edges[2]
edge2 = teeth[-1].Faces[-1].Edges[1]
face1 = make_face(edge1, edge2)
teeth.append(face1)
teeth.append(new_tooth)
top_cap.append(face1.Edges[3])
bottom_cap.append(face1.Edges[1])
top_cap += [i.Edges[0] for i in new_tooth.Faces]
bottom_cap += [i.Edges[3] for i in new_tooth.Faces]
edge1 = teeth[0].Faces[0].Edges[2]
edge2 = teeth[-1].Faces[-1].Edges[1]
face1 = make_face(edge1, edge2)
teeth.append(face1)
top_cap.append(face1.Edges[3])
bottom_cap.append(face1.Edges[1])
top_cap = Face(Wire(top_cap))
bottom_cap = Face(Wire(bottom_cap))
fcs = Compound(teeth).Faces
top_cap.reverse()
fp.Shape = Solid(Shell(fcs + [top_cap, bottom_cap]))
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)