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Function to detect if a given bBox is entirely covered by metal

Kodela

Hi,

any existing functions which is able to detect if a given bBox (on a given visible layer) is entirely covered by metal (can be Via pad, pin pad, shape, clines)?

e.g given a bBox, the function can detect the voids within the bBox and return a nil, else return a t.

 

if not, any existing basic function that i can start with to write such a function?

  • There is no such existing function. You need to create a polygon as large as your bBox.
    Then get from each copper element the polygons (axlDBGetPad, axlDBGetShapes and then pull each shape through axlPolyFromDB) and then do an axlPolyOperation( bbox_poly list_of_cu_poly 'ANDNOT). This subtracts all CU poly's from the bbox poly. If any poly remains then you have voids.
    Perhaps you need also to do something with the voids in shapes, axlPolyFromHole.

    If you have many elements it is wise to do a pre-selection (axlAddSelectBox) of the via's, cline(segs) and shapes.
    Polygon operation can take some time if you pass a lot of items.
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