def testOffsetReferences():
#f = TestObjects.makeHeartFace();
#f must be a face with one outer and one inner wire
f = TestObjects.makeSquareWithRoundHole();
wires = OCCUtil.wireListFromFace(f);
outer = wires[0];
inner = wires[1];
display.DisplayColoredShape(outer,'GREEN');
display.DisplayColoredShape(inner,'WHITE');
#add wires to offset.
bo = BRepOffsetAPI.BRepOffsetAPI_MakeOffset();
bo.AddWire(outer);
bo.AddWire(inner);
bo.Perform(-0.2,0.0); #do an offset
shape = bo.Shape();
for w in Topo(shape).wires():
display.DisplayColoredShape(OCCUtil.cast(shape),'YELLOW');
for e in Topo(outer).edges():
print "Outer Edge %d has %d generated shapes" % ( e.__hash__(), len(OCCUtil.listFromTopToolsListOfShape(bo.Generated(e) )) );
for e in Topo(inner).edges():
print "Inner Edge %d has %d generated shapes" % ( e.__hash__(), len(OCCUtil.listFromTopToolsListOfShape(bo.Generated(e) )) );
display.FitAll();
def offsetOnce(self,distance):
bo = BRepOffsetAPI.BRepOffsetAPI_MakeOffset();
map(bo.AddWire, self.lastWires);
print "%d wires to offset at step 1, distance = %0.3f" % ( len(self.lastWires),distance);
bo.Perform(distance,0.0);
result1 = Topo(bo.Shape());
#now offset back outwards
bo2 = BRepOffsetAPI.BRepOffsetAPI_MakeOffset();
for w in result1.wires():
bo2.AddWire(w);
print "Offsetting %0.3f" % ( (-0.5)*distance);
bo2.Perform((-0.5)*distance, 0.0);
result2 = Topo(bo2.Shape());
returnList= [];
#compound result can be a compound of edges and/or wires. weird weird
for c in OCCUtil.childShapes(bo2.Shape() ):
#display.DisplayColoredShape(c,'BLUE')
if c.ShapeType() == TopAbs.TopAbs_WIRE:
returnList.append(c); #these are actually the wires we want to keep
self.otherWires.append(c);
elif c.ShapeType() == TopAbs.TopAbs_EDGE:
w = OCCUtil.wireFromEdges([c])
returnList.append(w);
self.otherWires.append(w);
else:
print "Warning: compound resulting from offset i am confused about-- not an edge or a wire."
if len(returnList) == 0:
return returnList; #do nothing further if the offset computed no curves
else:
print "2nd step yielded %d wires" % len(returnList)
#for each original edge, compute its descendant edges
#self.edgeMap will contain entries with the original edges, pointing to the generated
#edges and the corresponding wire:
# e1 --> [ (e2, w2 ), (e3 , w3 ) ];
for w in self.lastWires:
originalWire = Topo(w);
for oe in originalWire.edges():
self.edgeMap[oe.__hash__()] = [];
#find generated values from first transformation
generatedStep1 = OCCUtil.listFromTopToolsListOfShape(bo.Generated(oe));
for ne in generatedStep1:
#find edges generated from that original edge
generatedStep2 = OCCUtil.listFromTopToolsListOfShape(bo2.Generated(ne));
for ge in generatedStep2:
#get wire this belongs to this returns a list but how could there ever be more than one?
gwires = []
for g in result2.wires_from_edge(ge):
gwires.append(g);
self.edgeMap[oe.__hash__()].append ( (ge,gwires[0] ));
self.lastWires = returnList;
return returnList;
def testOffsetReferences():
#f = TestObjects.makeHeartFace();
#f must be a face with one outer and one inner wire
f = TestObjects.makeSquareWithRoundHole()
wires = OCCUtil.wireListFromFace(f)
outer = wires[0]
inner = wires[1]
display.DisplayColoredShape(outer, 'GREEN')
display.DisplayColoredShape(inner, 'WHITE')
#add wires to offset.
bo = BRepOffsetAPI.BRepOffsetAPI_MakeOffset()
bo.AddWire(outer)
bo.AddWire(inner)
bo.Perform(-0.2, 0.0)
#do an offset
shape = bo.Shape()
for w in Topo(shape).wires():
display.DisplayColoredShape(OCCUtil.cast(shape), 'YELLOW')
for e in Topo(outer).edges():
print "Outer Edge %d has %d generated shapes" % (
e.__hash__(),
len(OCCUtil.listFromTopToolsListOfShape(bo.Generated(e))))
for e in Topo(inner).edges():
print "Inner Edge %d has %d generated shapes" % (
e.__hash__(),
len(OCCUtil.listFromTopToolsListOfShape(bo.Generated(e))))
display.FitAll()
def offsetOnceSimple(self, distance):
bo = BRepOffsetAPI.BRepOffsetAPI_MakeOffset()
map(bo.AddWire, self.lastWires)
print "%d wires to offset at step 1, distance = %0.3f" % (len(
self.lastWires), distance)
bo.Perform(distance * (0.5), 0.0)
result1 = Topo(bo.Shape())
returnList = []
#compound result can be a compound of edges and/or wires. weird weird
for c in OCCUtil.childShapes(bo.Shape()):
display.DisplayColoredShape(c, 'BLUE')
if c.ShapeType() == TopAbs.TopAbs_WIRE:
returnList.append(c)
#these are actually the wires we want to keep
elif c.ShapeType() == TopAbs.TopAbs_EDGE:
w = OCCUtil.wireFromEdges([c])
returnList.append(w)
else:
print "Warning: compound resulting from offset i am confused about-- not an edge or a wire."
#for each original edge, compute its descendant edges
#self.edgeMap will contain entries with the original edges, pointing to the generated
#edges and the corresponding wire:
# e1 --> [ (e2, w2 ), (e3 , w3 ) ];
for w in self.lastWires:
originalWire = Topo(w)
for oe in originalWire.edges():
self.edgeMap[oe.__hash__()] = []
#find generated values from first transformation
generatedStep1 = OCCUtil.listFromTopToolsListOfShape(
bo.Generated(oe))
for ne in generatedStep1:
#get wire this belongs to this returns a list but how could there ever be more than one?
gwires = []
for g in result1.wires_from_edge(ne):
gwires.append(g)
self.edgeMap[oe.__hash__()].append((ne, gwires[0]))
self.lastWires = returnList
self.otherWires.extend(returnList)
return returnList
