DBID of overlapping components

Hi

It depends on what you mean by overlapping components, is it 2 place bounds overlapping, pins overlapping or what define if they are overlapping?

You could setup drc checks for this and run through the DRCs.

Best regards

Ole

Our library components have shapes on "PCKAGE GEOMETRY/DFA_BOUND_(TOP,BOTTOM)"
so I think I would need to find those components which shapes on this layer are overlapping (can touch but cannot go one on the another).

Hi

DFA constraints in Allegro are built for this exact purpose and you can even specify spacing between dfa bounds on different component classes.

You can enable and set this up within Setup->Constraints->DFA Constraint Spreadsheet

After you've set this up online DRC checking will be performed and you will get a DRC error immediately.

I once did a movie about this which can be seen on YouTube at https://youtu.be/tyiPnsQqx7Q (it is in Danish but you should get the idea from watching it)

Will this work for you or do you have another reason for wanting to do this using SKILL?

Best regards

Ole

I know this tool but not sure how to use it to achieve my goal.

The reason I need to find this DBID from inside SKILL is for automatic documentation creation for Production Facility.

What I need to do is:
1) find DBID of overlapping components
2) create layer with surrounding lines arround this 2 or more overlaping components

Second part I have almost done and it is working well, but I am giving DBIDs manualy, so just need to find somehow this DBIDs

Hi

notice that dbid's are not static!

you could walk over all dfa bounds and do math to find out if they overlap

l = axlDBGetDesign()->symbols
foreach(lid l
refdes = lid->refdes ; get the reference designator
foreach(cid lid->children
when(lowerCase(cid->layer) == "package geometry/place_bound_top"
; here you have a single geometry and needs to check it against other geometries

)
)
)

I would however use DFA as stated above and then run over all DRCs to find the objects (components) causing the issue and then create the rectangle

Best regards

Ole

If you would do it without the Allegro DRC system then you need to check each component to all other components.

Quickest way to do this is first check bBox overlap, if so then check if the polygon is overlapping, meaning an result with 'AND' operation.

So something like this:

;lsym = setof(id axlDBGetDesign()->symbols id->isMirrored)                ;bottom side
lsym = setof(id axlDBGetDesign()->symbols not(id->isMirrored))  ;top side
pcre = pcreCompile("package geometry/dfa_bound" 1)
while(lsym
    id1 = car(lsym)
    lsym = cdr(lsym)
    foreach(id2 lsym
        ;first do a rough compare, compare bbox overlap of ID1 and ID2. This is faster than doing polygon compare
        when( _axlIsBoxOverlap(id1->bBox id2->bBox)
            ;if overlap then do polygon compare
            lchildrenID1 = setof(id id1->children pcreMatchp(pcre    id->layer))
            lchildrenID2 = setof(id id2->children pcreMatchp(pcre    id->layer))
            when(and(lchildrenID1 lchildrenID2)
                lpolyID1= mapcar('car mapcar('axlPolyFromDB lchildrenID1))
                lpolyID2= mapcar('car mapcar('axlPolyFromDB lchildrenID2))
                lANDpoly = axlPolyOperation(lpolyID1 lpolyID2 'AND)
                when(car(lANDpoly)
                        axlMsgPut("%L @%P - %L @%P have overlapping geometry" id1->refdes id1->xy id2->refdes id2->xy )
                )
            )
        )
    )
)

Bram

That works perfect, exactly what I was looking for.
Nevertheless I have one issue with duplicates.
I am inserting result into the list and I get:
(("C24006"  "R24020") ("C16036" "MP32004") ( "R24020" "C24006") ("MP32004" "C16036"))

So there are duplicates but with different order. 
Can you please help with deleting those duplicates to get list like 
(("C24006"  "R24020") ("C16036" "MP32004"))

Thank you in advance.

That works perfect, exactly what I was looking for.
Nevertheless I have one issue with duplicates.
I am inserting result into the list and I get:
(("C24006"  "R24020") ("C16036" "MP32004") ( "R24020" "C24006") ("MP32004" "C16036"))

So there are duplicates but with different order. 
Can you please help with deleting those duplicates to get list like 
(("C24006"  "R24020") ("C16036" "MP32004"))

Thank you in advance.

That is weird. It goes through each symbol and puts it in 'ID1' , but for each ID1 it looks at all other symbols (ID2), excluding the previously checked ID1's.

So double hits should not occur. If you have double symbol dbID's in the lsym then it is possible.

Could you try to add the following 'unique' line ?

pcre = pcreCompile("package geometry/dfa_bound" 1)

lsym = unique(lsym)
while(lsym

Otherwise post the code which you have currently.

Yes you are right. I have made mistake in my code. Now it works.
Thank you !