def make_offset(wire_or_face,
offsetDistance,
altitude=0,
joinType=GeomAbs_Arc):
'''
builds a offsetted wire or face from a wire or face
construct an offsetted version of the shape
@param wire_or_face: the wire or face to offset
@param offsetDistance: the distance to offset
@param altitude: move the offsetted shape to altitude
from the normal of the wire or face
@param joinType: the type of offset you want
can be one of GeomAbs_Arc, GeomAbs_Tangent, GeomAbs_Intersection
note: a shape that has a negative offsetDistance will return
a sharp corner
'''
from OCC.Core.BRepOffsetAPI import BRepOffsetAPI_MakeOffset
_joints = [GeomAbs_Arc, GeomAbs_Tangent, GeomAbs_Intersection]
assert joinType in _joints, '%s is not one of %s' % (joinType, _joints)
try:
offset = BRepOffsetAPI_MakeOffset(wire_or_face, joinType)
offset.Perform(offsetDistance, altitude)
if offset.IsDone():
return ST(offset.Shape())
else:
return None
except RuntimeError('failed to offset shape'):
return None
def __init__(self,
spine,
distance,
altitude=0.,
join=Geometry.ARC,
is_open=False):
offset = BRepOffsetAPI_MakeOffset(spine.object, join, is_open)
offset.Perform(distance, altitude)
self._w = Wire(offset.Shape())
def getDaoOffsetWire(self, offset):
classicWire = self.getCached('getDaoClassicWire')
tool = BRepOffsetAPI_MakeOffset()
tool.AddWire(classicWire)
tool.Perform(-offset)
offsetWire = tool.Shape()
return offsetWire
def create_offsets(face, nr_of_counters, distance_between_contours):
offset = BRepOffsetAPI_MakeOffset()
offset.Init(GeomAbs_Arc)
for wi in TopologyExplorer(face).wires():
offset.AddWire(wi)
for i in range(nr_of_counters):
offset.Perform(-distance_between_contours * i)
if offset.IsDone():
yield offset.Shape()
def make_offsets(face, num, distance):
offset = BRepOffsetAPI_MakeOffset(face, GeomAbs_Arc, False)
# add all wires to offset algo
for w in TopologyExplorer(face).wires():
offset.AddWire(w)
result = []
# perform offsets
for i in range(num):
offset.Perform(-1 * distance * i)
if offset.IsDone():
# display.DisplayShape(offset.Shape(), update=True)
result.append(offset.Shape())
return result
def makeOffsetWire(aWire, offset):
tool = BRepOffsetAPI_MakeOffset()
tool.AddWire(aWire)
tool.Perform(offset)
aOffsetWire = tool.Shape()
return aOffsetWire
def getShapeOffset(shape, offset):
tool = BRepOffsetAPI_MakeOffset()
tool.AddWire(shape)
tool.Perform(offset)
shape = tool.Shape()
return shape