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Symmetric extrude with respect to the workplane

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Added additional parameter (both=Flase by default) to the extrude method
which allows to symmetrically extrude with respect to he current
workplane
This commit is contained in:
adam-urbanczyk 2016-05-22 20:31:27 +02:00
parent bcea03d4d6
commit 32160d16a2
1 changed files with 11 additions and 4 deletions
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15
cadquery/cq.py
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@ -1967,7 +1967,7 @@ class Workplane(CQ):
if clean: newS = newS.clean()
return newS
def extrude(self, distance, combine=True, clean=True):
def extrude(self, distance, combine=True, clean=True, both=False):
"""
Use all un-extruded wires in the parent chain to create a prismatic solid.
@ -1975,6 +1975,7 @@ class Workplane(CQ):
:type distance: float, negative means opposite the normal direction
:param boolean combine: True to combine the resulting solid with parent solids if found.
:param boolean clean: call :py:meth:`clean` afterwards to have a clean shape
:param boolean both: extrude in both directions symmetrically
:return: a CQ object with the resulting solid selected.
extrude always *adds* material to a part.
@ -1990,8 +1991,9 @@ class Workplane(CQ):
Support for non-prismatic extrusion ( IE, sweeping along a profile, not just
perpendicular to the plane extrude to surface. this is quite tricky since the surface
selected may not be planar
"""
r = self._extrude(distance) # returns a Solid (or a compound if there were multiple)
"""
r = self._extrude(distance,both=both) # returns a Solid (or a compound if there were multiple)
if combine:
newS = self._combineWithBase(r)
else:
@ -2254,11 +2256,12 @@ class Workplane(CQ):
return self.newObject([r])
def _extrude(self, distance):
def _extrude(self, distance, both=False):
"""
Make a prismatic solid from the existing set of pending wires.
:param distance: distance to extrude
:param boolean both: extrude in both directions symmetrically
:return: a FreeCAD solid, suitable for boolean operations.
This method is a utility method, primarily for plugin and internal use.
@ -2305,6 +2308,10 @@ class Workplane(CQ):
for ws in wireSets:
thisObj = Solid.extrudeLinear(ws[0], ws[1:], eDir)
toFuse.append(thisObj)
if both:
thisObj = Solid.extrudeLinear(ws[0], ws[1:], eDir.multiply(-1.))
toFuse.append(thisObj)
return Compound.makeCompound(toFuse)