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Merge pull request #134 from huskier/master

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Add mirroring operation for 3D CQ object and add tessellate(0.1) in the BoundBox function
This commit is contained in:
Dave Cowden 2016-01-21 20:12:52 -05:00
commit 9922755bae
4 changed files with 123 additions and 1 deletions
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13
cadquery/cq.py
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@ -742,6 +742,19 @@ class CQ(object):
return self.newObject([o.rotate(axisStartPoint, axisEndPoint, angleDegrees)
for o in self.objects])
def mirror(self, mirrorPlane="XY", basePointVector=(0, 0, 0)):
"""
Mirror a single CQ object. This operation is the same as in the FreeCAD PartWB's mirroring
:param mirrorPlane: the plane to mirror about
:type mirrorPlane: string, one of "XY", "YX", "XZ", "ZX", "YZ", "ZY" the planes
:param basePointVector: the base point to mirror about
:type basePointVector: tuple
"""
newS = self.newObject([self.objects[0].mirror(mirrorPlane, basePointVector)])
return newS.first()
def translate(self, vec):
"""
Returns a copy of all of the items on the stack moved by the specified translation vector.

16
cadquery/freecad_impl/shapes.py
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@ -184,9 +184,23 @@ class Shape(object):
def isValid(self):
return self.wrapped.isValid()
def BoundingBox(self):
def BoundingBox(self, tolerance=0.1):
self.wrapped.tessellate(tolerance)
return BoundBox(self.wrapped.BoundBox)
def mirror(self, mirrorPlane="XY", basePointVector=(0, 0, 0)):
if mirrorPlane == "XY" or mirrorPlane== "YX":
mirrorPlaneNormalVector = FreeCAD.Base.Vector(0, 0, 1)
elif mirrorPlane == "XZ" or mirrorPlane == "ZX":
mirrorPlaneNormalVector = FreeCAD.Base.Vector(0, 1, 0)
elif mirrorPlane == "YZ" or mirrorPlane == "ZY":
mirrorPlaneNormalVector = FreeCAD.Base.Vector(1, 0, 0)
if type(basePointVector) == tuple:
basePointVector = Vector(basePointVector)
return Shape.cast(self.wrapped.mirror(basePointVector.wrapped, mirrorPlaneNormalVector))
def Center(self):
# A Part.Shape object doesn't have the CenterOfMass function, but it's wrapped Solid(s) does
if isinstance(self.wrapped, FreeCADPart.Shape):

58
doc/examples.rst
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@ -312,6 +312,64 @@ introduce horizontal and vertical lines, which make for slightly easier coding.
* :py:meth:`Workplane`
* :py:meth:`Workplane.extrude`
Mirroring 3D Objects
-----------------------------
.. cq_plot::
result0 = (cadquery.Workplane("XY")
.moveTo(10,0)
.lineTo(5,0)
.threePointArc((3.9393,0.4393),(3.5,1.5))
.threePointArc((3.0607,2.5607),(2,3))
.lineTo(1.5,3)
.threePointArc((0.4393,3.4393),(0,4.5))
.lineTo(0,13.5)
.threePointArc((0.4393,14.5607),(1.5,15))
.lineTo(28,15)
.lineTo(28,13.5)
.lineTo(24,13.5)
.lineTo(24,11.5)
.lineTo(27,11.5)
.lineTo(27,10)
.lineTo(22,10)
.lineTo(22,13.2)
.lineTo(14.5,13.2)
.lineTo(14.5,10)
.lineTo(12.5,10 )
.lineTo(12.5,13.2)
.lineTo(5.5,13.2)
.lineTo(5.5,2)
.threePointArc((5.793,1.293),(6.5,1))
.lineTo(10,1)
.close())
result = result0.extrude(100)
result = result.rotate((0, 0, 0),(1, 0, 0), 90)
result = result.translate(result.val().BoundingBox().center.multiply(-1))
mirXY_neg = result.mirror(mirrorPlane="XY", basePointVector=(0, 0, -30))
mirXY_pos = result.mirror(mirrorPlane="XY", basePointVector=(0, 0, 30))
mirZY_neg = result.mirror(mirrorPlane="ZY", basePointVector=(-30,0,0))
mirZY_pos = result.mirror(mirrorPlane="ZY", basePointVector=(30,0,0))
result = result.union(mirXY_neg).union(mirXY_pos).union(mirZY_neg).union(mirZY_pos)
build_object(result)
.. topic:: Api References
.. hlist::
:columns: 2
* :py:meth:`Workplane.moveTo`
* :py:meth:`Workplane.lineTo`
* :py:meth:`Workplane.threePointArc`
* :py:meth:`Workplane.extrude`
* :py:meth:`Workplane.mirror`
* :py:meth:`Workplane.union`
* :py:meth:`CQ.rotate`
Creating Workplanes on Faces
-----------------------------

37
tests/TestCadQuery.py
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@ -550,6 +550,43 @@ class TestCadQuery(BaseTest):
self.assertEqual(10,currentS.faces().size())
def testBoundingBox(self):
"""
Tests the boudingbox center of a model
"""
result0 = (Workplane("XY")
.moveTo(10,0)
.lineTo(5,0)
.threePointArc((3.9393,0.4393),(3.5,1.5))
.threePointArc((3.0607,2.5607),(2,3))
.lineTo(1.5,3)
.threePointArc((0.4393,3.4393),(0,4.5))
.lineTo(0,13.5)
.threePointArc((0.4393,14.5607),(1.5,15))
.lineTo(28,15)
.lineTo(28,13.5)
.lineTo(24,13.5)
.lineTo(24,11.5)
.lineTo(27,11.5)
.lineTo(27,10)
.lineTo(22,10)
.lineTo(22,13.2)
.lineTo(14.5,13.2)
.lineTo(14.5,10)
.lineTo(12.5,10 )
.lineTo(12.5,13.2)
.lineTo(5.5,13.2)
.lineTo(5.5,2)
.threePointArc((5.793,1.293),(6.5,1))
.lineTo(10,1)
.close())
result = result0.extrude(100)
bb_center = result.val().BoundingBox().center
self.saveModel(result)
self.assertAlmostEqual(14.0, bb_center.x, 3)
self.assertAlmostEqual(7.5, bb_center.y, 3)
self.assertAlmostEqual(50.0, bb_center.z, 3)
def testCutThroughAll(self):
"""
Tests a model that uses more than one workplane