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How to exchange layers safely?

tribotree

Hello,

I want to exchange layers in layout, for example, swap "M1" and "M2" , here is my code:

layer1Obj = car(exists(lpp pcCellView~>lpps lpp~>layerName == "M1"))

layer2Obj = car(exists(lpp pcCellView~>lpps lpp~>layerName == "M2"))

layer1Obj~>shapes~>layerName = "M2"

layer2Obj~>shapes~>layerName = "M1"

But this does not work, both layers change to M1 actually. Providing the layout contains lots of shapes, Is there a more efficient and safe way to change layers? 



Parents

  • That's not really surprising, because you've stored in layer1Obj and layer2Obj the LPP object, not the shapes. So what happens is that you access the LPP object for M2, change all the associated shapes to be on M1, and so those shapes will now be part of layer2Obj~>shapes along with all the original M2 shapes; then you change all the M2 shapes (including the newly converted shapes) to M1.

    Instead, do this:

    layer1Shapes=layer1Obj~>shapes
    layer2Shapes=layer2Obj~>shapes
    layer1Shapes~>layerName="M2"
    layer2Shapes~>layerName="M1"

    By doing this, you've captured the list of shapes for each layer before you start changing layers, and those lists won't change.

    Regards,

    Andrew.

Reply

  • That's not really surprising, because you've stored in layer1Obj and layer2Obj the LPP object, not the shapes. So what happens is that you access the LPP object for M2, change all the associated shapes to be on M1, and so those shapes will now be part of layer2Obj~>shapes along with all the original M2 shapes; then you change all the M2 shapes (including the newly converted shapes) to M1.

    Instead, do this:

    layer1Shapes=layer1Obj~>shapes
    layer2Shapes=layer2Obj~>shapes
    layer1Shapes~>layerName="M2"
    layer2Shapes~>layerName="M1"

    By doing this, you've captured the list of shapes for each layer before you start changing layers, and those lists won't change.

    Regards,

    Andrew.

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