def operate(self,design):
operationgeom = design.sketches[self.sketchid].output_csg()
layers = [design.return_layer_definition().getlayer(item) for item in self.layer_links]
try:
laminate1 = design.op_from_ref(self.operation_link1).output[self.getoutputref()].csg
except NoOperation:
laminate1 = Laminate(design.return_layer_definition())
laminate2 = Laminate(design.return_layer_definition())
for layer in layers:
laminate2.replacelayergeoms(layer,operationgeom)
lsout = laminate1.binaryoperation(laminate2,self.function)
return lsout
