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Problem with obtaining correct bounding box

KetCadence

 Hello All,

I am working on one of the module where I need to obtain bounding box for some of the components of PCB using skill script.

I have already written skill script to obtain bounding box for selected components.

I am using  "axlDBGetExtents" function for this.

However, I am facing one problem with this method.

Problem:

Bounding boxes obtained using this function are larger than what I need.

For my purpose, I need bounding box prefereably (or I would say ideally) of the size of top surface of the component.

My Current Method:

I have used "t" as second argument for axlDBGetExtents(id t) function.

According to documentation,  by using "t" as a second argument, bounding box only for visible parts of component is selected.

I am controlling visibility by using "Display->Color/Visibility" option.

I am choosing to disable all options except "Package Geometry -> Assembly_Top & Display_Top".

 

Please let me know if I am doing something wrong here as I have started using this software only a month ago.

Any suggestions that would help me in resolving this problem are welcome.

 

 

 

Parents

  • I'm using specific layers DFA_BOUND_xxx or PLACE_BOUND_xxx and bBox property.

    As I do it:

    ;
    ; Get object boundary box.
    ; First trying get Dfa_Bound_Top(Bottom)
    ; if Dfa not present trying Place_Bound_Top(Bottom)
    ; if Place not present get bBox property.
    ;
    defun( getObjectBBox (object)
        let( ( objectChildren child dfaLayer placeLayer result)
            if(object->isMirrored
                then dfaLayer = "PACKAGE GEOMETRY/DFA_BOUND_BOTTOM" placeLayer = "PACKAGE GEOMETRY/PLACE_BOUND_BOTTOM"
                else dfaLayer = "PACKAGE GEOMETRY/DFA_BOUND_TOP" placeLayer = "PACKAGE GEOMETRY/PLACE_BOUND_TOP"
            )
            objectChildren = object->children
            ; only Symbols have objectChildren
            if(objectChildren then
                ; find Dfa_Bound_ shape
                foreach( child objectChildren
                    if((child->objType == "shape" && child->layer == dfaLayer) then
                        result = child->bBox
                    )
                )
                ; find Place_Bound_ shape
                if(!result then
                    foreach( child objectChildren
                        if((child->objType == "shape" && child->layer == placeLayer) then
                            result = child->bBox
                        )
                    )
                )
            )
            if(!result then result = object->bBox)
            result
        ) ; let
    ) ; defun
Reply

  • I'm using specific layers DFA_BOUND_xxx or PLACE_BOUND_xxx and bBox property.

    As I do it:

    ;
    ; Get object boundary box.
    ; First trying get Dfa_Bound_Top(Bottom)
    ; if Dfa not present trying Place_Bound_Top(Bottom)
    ; if Place not present get bBox property.
    ;
    defun( getObjectBBox (object)
        let( ( objectChildren child dfaLayer placeLayer result)
            if(object->isMirrored
                then dfaLayer = "PACKAGE GEOMETRY/DFA_BOUND_BOTTOM" placeLayer = "PACKAGE GEOMETRY/PLACE_BOUND_BOTTOM"
                else dfaLayer = "PACKAGE GEOMETRY/DFA_BOUND_TOP" placeLayer = "PACKAGE GEOMETRY/PLACE_BOUND_TOP"
            )
            objectChildren = object->children
            ; only Symbols have objectChildren
            if(objectChildren then
                ; find Dfa_Bound_ shape
                foreach( child objectChildren
                    if((child->objType == "shape" && child->layer == dfaLayer) then
                        result = child->bBox
                    )
                )
                ; find Place_Bound_ shape
                if(!result then
                    foreach( child objectChildren
                        if((child->objType == "shape" && child->layer == placeLayer) then
                            result = child->bBox
                        )
                    )
                )
            )
            if(!result then result = object->bBox)
            result
        ) ; let
    ) ; defun
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