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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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13
cadquery/cq.py
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@ -1967,7 +1967,7 @@ class Workplane(CQ):
if clean: newS = newS.clean() if clean: newS = newS.clean()
return newS 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. 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 :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 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 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. :return: a CQ object with the resulting solid selected.
extrude always *adds* material to a part. extrude always *adds* material to a part.
@ -1991,7 +1992,8 @@ class Workplane(CQ):
perpendicular to the plane extrude to surface. this is quite tricky since the surface perpendicular to the plane extrude to surface. this is quite tricky since the surface
selected may not be planar 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: if combine:
newS = self._combineWithBase(r) newS = self._combineWithBase(r)
else: else:
@ -2254,11 +2256,12 @@ class Workplane(CQ):
return self.newObject([r]) 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. Make a prismatic solid from the existing set of pending wires.
:param distance: distance to extrude :param distance: distance to extrude
:param boolean both: extrude in both directions symmetrically
:return: a FreeCAD solid, suitable for boolean operations. :return: a FreeCAD solid, suitable for boolean operations.
This method is a utility method, primarily for plugin and internal use. This method is a utility method, primarily for plugin and internal use.
@ -2306,6 +2309,10 @@ class Workplane(CQ):
thisObj = Solid.extrudeLinear(ws[0], ws[1:], eDir) thisObj = Solid.extrudeLinear(ws[0], ws[1:], eDir)
toFuse.append(thisObj) toFuse.append(thisObj)
if both:
thisObj = Solid.extrudeLinear(ws[0], ws[1:], eDir.multiply(-1.))
toFuse.append(thisObj)
return Compound.makeCompound(toFuse) return Compound.makeCompound(toFuse)
def _revolve(self, angleDegrees, axisStart, axisEnd): def _revolve(self, angleDegrees, axisStart, axisEnd):