def move(orig_pypt, location_pypt, occtopology):
"""
This function moves an OCCtopology from the orig_pypt to the location_pypt.
Parameters
----------
orig_pypt : tuple of floats
The OCCtopology will move in reference to this point.
A pypt is a tuple that documents the xyz coordinates of a pt e.g. (x,y,z)
location_pypt : tuple of floats
The destination of where the OCCtopology will be moved in relation to the orig_pypt.
A pypt is a tuple that documents the xyz coordinates of a pt e.g. (x,y,z)
occtopology : OCCtopology
The OCCtopology to be moved.
OCCtopology includes: OCCshape, OCCcompound, OCCcompsolid, OCCsolid, OCCshell, OCCface, OCCwire, OCCedge, OCCvertex
Returns
-------
moved topology : OCCtopology (OCCshape)
The moved OCCtopology.
"""
gp_ax31 = gp_Ax3(gp_Pnt(orig_pypt[0], orig_pypt[1], orig_pypt[2]), gp_DZ())
gp_ax32 = gp_Ax3(
gp_Pnt(location_pypt[0], location_pypt[1], location_pypt[2]), gp_DZ())
aTrsf = gp_Trsf()
aTrsf.SetTransformation(gp_ax32, gp_ax31)
trsf_brep = BRepBuilderAPI_Transform(aTrsf)
trsf_brep.Perform(occtopology, True)
trsf_shp = trsf_brep.Shape()
return trsf_shp
def move(orig_pypt, location_pypt, occtopology):
"""
This function moves an OCCtopology from the orig_pypt to the location_pypt.
Parameters
----------
orig_pypt : tuple of floats
The OCCtopology will move in reference to this point.
A pypt is a tuple that documents the xyz coordinates of a pt e.g. (x,y,z)
location_pypt : tuple of floats
The destination of where the OCCtopology will be moved in relation to the orig_pypt.
A pypt is a tuple that documents the xyz coordinates of a pt e.g. (x,y,z)
occtopology : OCCtopology
The OCCtopology to be moved.
OCCtopology includes: OCCshape, OCCcompound, OCCcompsolid, OCCsolid, OCCshell, OCCface, OCCwire, OCCedge, OCCvertex
Returns
-------
moved topology : OCCtopology (OCCshape)
The moved OCCtopology.
"""
gp_ax31 = gp_Ax3(gp_Pnt(orig_pypt[0], orig_pypt[1], orig_pypt[2]), gp_DZ())
gp_ax32 = gp_Ax3(gp_Pnt(location_pypt[0], location_pypt[1], location_pypt[2]), gp_DZ())
aTrsf = gp_Trsf()
aTrsf.SetTransformation(gp_ax32,gp_ax31)
trsf_brep = BRepBuilderAPI_Transform(aTrsf)
trsf_brep.Perform(occtopology, True)
trsf_shp = trsf_brep.Shape()
return trsf_shp
def move(orig_pt, location_pt, occshape):
gp_ax31 = gp_Ax3(gp_Pnt(orig_pt[0], orig_pt[1], orig_pt[2]), gp_DZ())
gp_ax32 = gp_Ax3(gp_Pnt(location_pt[0], location_pt[1], location_pt[2]),
gp_DZ())
aTrsf = gp_Trsf()
aTrsf.SetTransformation(gp_ax32, gp_ax31)
trsf_brep = BRepBuilderAPI_Transform(aTrsf)
trsf_brep.Perform(occshape, True)
trsf_shp = trsf_brep.Shape()
return trsf_shp
def mounting_holes(base):
result = base
for i in range(0, mounting_hole_count):
center = gp_Pnt(
cos(i * M_PI / 3) * mounting_radius,
sin(i * M_PI / 3) * mounting_radius, 0.0)
center_axis = gp_Ax2(center, gp_DZ())
cylinder = BRepPrimAPI_MakeCylinder(center_axis, hole_radius,
thickness).Shape()
result = BRepAlgoAPI_Cut(result, cylinder).Shape()
cone = BRepPrimAPI_MakeCone(center_axis, hole_radius + thickness / 2.,
hole_radius, thickness / 2.)
result = BRepAlgoAPI_Cut(result, cone.Shape()).Shape()
return result
def _make_circle(self):
circle = gp_Circ(gp_Ax2(gp_Pnt(1, 2, 3), gp_DZ()), 2.)
return Shape.cast(BRepBuilderAPI_MakeEdge(circle).Edge())
def _make_ellipse(self):
ellipse = gp_Elips(gp_Ax2(gp_Pnt(1, 2, 3), gp_DZ()), 4.0, 2.0)
return Shape.cast(BRepBuilderAPI_MakeEdge(ellipse).Edge())
def build_tooth():
base_center = gp_Pnt2d(
pitch_circle_radius + (tooth_radius - roller_radius), 0)
base_circle = gp_Circ2d(gp_Ax2d(base_center, gp_Dir2d()), tooth_radius)
trimmed_base = GCE2d_MakeArcOfCircle(base_circle,
M_PI - (roller_contact_angle / 2.),
M_PI).Value()
Proxy(trimmed_base).Reverse() # just a trick
p0 = Proxy(trimmed_base).StartPoint()
p1 = Proxy(trimmed_base).EndPoint()
# Determine the center of the profile circle
x_distance = cos(
roller_contact_angle / 2.) * (profile_radius + tooth_radius)
y_distance = sin(
roller_contact_angle / 2.) * (profile_radius + tooth_radius)
profile_center = gp_Pnt2d(pitch_circle_radius - x_distance, y_distance)
# Construct the profile circle gp_Circ2d
profile_circle = gp_Circ2d(gp_Ax2d(profile_center, gp_Dir2d()),
profile_center.Distance(p1))
geom_profile_circle = GCE2d_MakeCircle(profile_circle).Value()
# Construct the outer circle gp_Circ2d
outer_circle = gp_Circ2d(gp_Ax2d(gp_Pnt2d(0, 0), gp_Dir2d()), top_radius)
geom_outer_circle = GCE2d_MakeCircle(outer_circle).Value()
inter = Geom2dAPI_InterCurveCurve(geom_profile_circle, geom_outer_circle)
num_points = inter.NbPoints()
assert isinstance(p1, gp_Pnt2d)
if num_points == 2:
if p1.Distance(inter.Point(1)) < p1.Distance(inter.Point(2)):
p2 = inter.Point(1)
else:
p2 = inter.Point(2)
elif num_points == 1:
p2 = inter.Point(1)
else:
exit(-1)
# Trim the profile circle and mirror
trimmed_profile = GCE2d_MakeArcOfCircle(profile_circle, p1, p2).Value()
# Calculate the outermost point
p3 = gp_Pnt2d(
cos(tooth_angle / 2.) * top_radius,
sin(tooth_angle / 2.) * top_radius)
# and use it to create the third arc
trimmed_outer = GCE2d_MakeArcOfCircle(outer_circle, p2, p3).Value()
# Mirror and reverse the three arcs
mirror_axis = gp_Ax2d(gp_Origin2d(), gp_DX2d().Rotated(tooth_angle / 2.))
mirror_base = Handle_Geom2d_TrimmedCurve.DownCast(
Proxy(trimmed_base).Copy())
mirror_profile = Handle_Geom2d_TrimmedCurve.DownCast(
Proxy(trimmed_profile).Copy())
mirror_outer = Handle_Geom2d_TrimmedCurve.DownCast(
Proxy(trimmed_outer).Copy())
Proxy(mirror_base).Mirror(mirror_axis)
Proxy(mirror_profile).Mirror(mirror_axis)
Proxy(mirror_outer).Mirror(mirror_axis)
Proxy(mirror_base).Reverse()
Proxy(mirror_profile).Reverse()
Proxy(mirror_outer).Reverse()
# Replace the two outer arcs with a single one
outer_start = Proxy(trimmed_outer).StartPoint()
outer_mid = Proxy(trimmed_outer).EndPoint()
outer_end = Proxy(mirror_outer).EndPoint()
outer_arc = GCE2d_MakeArcOfCircle(outer_start, outer_mid,
outer_end).Value()
# Create an arc for the inside of the wedge
inner_circle = gp_Circ2d(gp_Ax2d(gp_Pnt2d(0, 0), gp_Dir2d()),
top_radius - roller_diameter)
inner_start = gp_Pnt2d(top_radius - roller_diameter, 0)
inner_arc = GCE2d_MakeArcOfCircle(inner_circle, inner_start,
tooth_angle).Value()
Proxy(inner_arc).Reverse()
# Convert the 2D arcs and two extra lines to 3D edges
plane = gp_Pln(gp_Origin(), gp_DZ())
arc1 = BRepBuilderAPI_MakeEdge(geomapi_To3d(trimmed_base, plane)).Edge()
arc2 = BRepBuilderAPI_MakeEdge(geomapi_To3d(trimmed_profile, plane)).Edge()
arc3 = BRepBuilderAPI_MakeEdge(geomapi_To3d(outer_arc, plane)).Edge()
arc4 = BRepBuilderAPI_MakeEdge(geomapi_To3d(mirror_profile, plane)).Edge()
arc5 = BRepBuilderAPI_MakeEdge(geomapi_To3d(mirror_base, plane)).Edge()
p4 = Proxy(mirror_base).EndPoint()
p5 = Proxy(inner_arc).StartPoint()
lin1 = BRepBuilderAPI_MakeEdge(gp_Pnt(p4.X(), p4.Y(), 0),
gp_Pnt(p5.X(), p5.Y(), 0)).Edge()
arc6 = BRepBuilderAPI_MakeEdge(geomapi_To3d(inner_arc, plane)).Edge()
p6 = Proxy(inner_arc).EndPoint()
lin2 = BRepBuilderAPI_MakeEdge(gp_Pnt(p6.X(), p6.Y(), 0),
gp_Pnt(p0.X(), p0.Y(), 0)).Edge()
wire = BRepBuilderAPI_MakeWire(arc1)
wire.Add(arc2)
wire.Add(arc3)
wire.Add(arc4)
wire.Add(arc5)
wire.Add(lin1)
wire.Add(arc6)
wire.Add(lin2)
face = BRepBuilderAPI_MakeFace(wire.Wire())
wedge = BRepPrimAPI_MakePrism(face.Shape(), gp_Vec(0.0, 0.0, thickness))
return wedge.Shape()
def cut_out(base):
outer = gp_Circ2d(gp_OX2d(), top_radius - 1.75 * roller_diameter)
inner = gp_Circ2d(gp_OX2d(), center_radius + 0.75 * roller_diameter)
geom_outer = GCE2d_MakeCircle(outer).Value()
geom_inner = GCE2d_MakeCircle(inner).Value()
Proxy(geom_inner).Reverse()
base_angle = (2. * M_PI) / mounting_hole_count
hole_angle = atan(hole_radius / mounting_radius)
correction_angle = 3 * hole_angle
left = gp_Lin2d(gp_Origin2d(), gp_DX2d())
right = gp_Lin2d(gp_Origin2d(), gp_DX2d())
left.Rotate(gp_Origin2d(), correction_angle)
right.Rotate(gp_Origin2d(), base_angle - correction_angle)
geom_left = GCE2d_MakeLine(left).Value()
geom_right = GCE2d_MakeLine(right).Value()
inter_1 = Geom2dAPI_InterCurveCurve(geom_outer, geom_left)
inter_2 = Geom2dAPI_InterCurveCurve(geom_outer, geom_right)
inter_3 = Geom2dAPI_InterCurveCurve(geom_inner, geom_right)
inter_4 = Geom2dAPI_InterCurveCurve(geom_inner, geom_left)
if inter_1.Point(1).X() > 0:
p1 = inter_1.Point(1)
else:
p1 = inter_1.Point(2)
if inter_2.Point(1).X() > 0:
p2 = inter_2.Point(1)
else:
p2 = inter_2.Point(2)
if inter_3.Point(1).X() > 0:
p3 = inter_3.Point(1)
else:
p3 = inter_3.Point(2)
if inter_4.Point(1).X() > 0:
p4 = inter_4.Point(1)
else:
p4 = inter_4.Point(2)
trimmed_outer = GCE2d_MakeArcOfCircle(outer, p1, p2).Value()
trimmed_inner = GCE2d_MakeArcOfCircle(inner, p4, p3).Value()
plane = gp_Pln(gp_Origin(), gp_DZ())
arc1 = BRepBuilderAPI_MakeEdge(geomapi_To3d(trimmed_outer, plane)).Edge()
lin1 = BRepBuilderAPI_MakeEdge(gp_Pnt(p2.X(), p2.Y(), 0),
gp_Pnt(p3.X(), p3.Y(), 0)).Edge()
arc2 = BRepBuilderAPI_MakeEdge(geomapi_To3d(trimmed_inner, plane)).Edge()
lin2 = BRepBuilderAPI_MakeEdge(gp_Pnt(p4.X(), p4.Y(), 0),
gp_Pnt(p1.X(), p1.Y(), 0)).Edge()
cutout_wire = BRepBuilderAPI_MakeWire(arc1)
cutout_wire.Add(lin1)
cutout_wire.Add(arc2)
cutout_wire.Add(lin2)
# Turn the wire into a face
cutout_face = BRepBuilderAPI_MakeFace(cutout_wire.Wire())
filleted_face = BRepFilletAPI_MakeFillet2d(cutout_face.Face())
explorer = BRepTools_WireExplorer(cutout_wire.Wire())
while explorer.More():
vertex = explorer.CurrentVertex()
filleted_face.AddFillet(vertex, roller_radius)
explorer.Next()
cutout = BRepPrimAPI_MakePrism(filleted_face.Shape(),
gp_Vec(0.0, 0.0, thickness)).Shape()
result = base
rotate = gp_Trsf()
for i in range(0, mounting_hole_count):
rotate.SetRotation(gp_OZ(), i * 2. * M_PI / mounting_hole_count)
rotated_cutout = BRepBuilderAPI_Transform(cutout, rotate, True)
result = BRepAlgoAPI_Cut(result, rotated_cutout.Shape()).Shape()
return result
# Add fillets to all edges through the explorer
mkFillet = BRepFilletAPI_MakeFillet(myBody.Shape())
anEdgeExplorer = TopExp_Explorer(myBody.Shape(), TopAbs_EDGE)
while anEdgeExplorer.More():
anEdge = topods.Edge(anEdgeExplorer.Current())
mkFillet.Add(thickness / 12.0, anEdge)
anEdgeExplorer.Next()
myBody = mkFillet
# Create the neck of the bottle
neckLocation = gp_Pnt(0, 0, height)
neckAxis = gp_DZ()
neckAx2 = gp_Ax2(neckLocation, neckAxis)
myNeckRadius = thickness / 4.0
myNeckHeight = height / 10.0
mkCylinder = BRepPrimAPI_MakeCylinder(neckAx2, myNeckRadius, myNeckHeight)
myBody = BRepAlgoAPI_Fuse(myBody.Shape(), mkCylinder.Shape())
# Our goal is to find the highest Z face and remove it
faceToRemove = None
zMax = -1
# We have to work our way through all the faces to find
# the highest Z face so we can remove it for the shell
# Add fillets to all edges through the explorer
mkFillet = BRepFilletAPI_MakeFillet(myBody.Shape())
anEdgeExplorer = TopExp_Explorer(myBody.Shape(), TopAbs_EDGE)
while anEdgeExplorer.More():
anEdge = topods.Edge(anEdgeExplorer.Current())
mkFillet.Add(thickness / 12.0, anEdge)
anEdgeExplorer.Next()
myBody = mkFillet
# Create the neck of the bottle
neckLocation = gp_Pnt(0, 0, height)
neckAxis = gp_DZ()
neckAx2 = gp_Ax2(neckLocation, neckAxis)
myNeckRadius = thickness / 4.0
myNeckHeight = height / 10.0
mkCylinder = BRepPrimAPI_MakeCylinder(neckAx2, myNeckRadius, myNeckHeight)
myBody = BRepAlgoAPI_Fuse(myBody.Shape(), mkCylinder.Shape())
# Our goal is to find the highest Z face and remove it
faceToRemove = None
zMax = -1
# We have to work our way through all the faces to find the highest Z face so we can remove it for the shell
aFaceExplorer = TopExp_Explorer(myBody.Shape(), TopAbs_FACE)
