Not

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Design Verification >
   Design Verification Commands >
       Object Creation Commands >
           Not

Input: Two DV layers (containing polygons)

Output: DV layer (containing polygons)

Description: Creates and returns a DV layer that contains geometry generated from the first layer geometry areas that are not common to the second layer geometry. This is not a symmetric operation. The order of the input layers does change the results.

• Not(A, B): Area covered by geometry on layer A that is not also covered by geometry on layer B.

• Not(B, A): Area covered by geometry on layer B that is not also covered by geometry on layer A.

• Geometry on input layers that are imported is merged prior to performing the Not operation. In the following example the two rectangles on layer A are merged into one polygon before doing the Not(A, B) operation. The result of the Not is one polygon.

• If the input layers are not imported (they are created within DV), the geometry is used “as is”. In the following example the two rectangles on layer A are not merged before doing the Not(A, B) operation. The results of the Not are a rectangle and a polygon that overlap.

Rule Set Example (JScript):

var layer1 = DVChecker.ImportLayer("trace");

var layer2 = DVChecker.ImportLayer("ground");

var notLayer = DVChecker.Not(layer1, layer2);

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