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Error when void shape?????????

ELEKVN

   I want to creat one shape and void it.
  I could creat shape by blow code
        
        ;*************************
        mypath = axlPathStart( list(-3200.000:5812.000))
        mypath = axlPathLine( mypath, 0.0, -3200.000:5020.000)
        mypath = axlPathLine( mypath, 0.0, -4016.000:5020.000)
        mypath = axlPathLine( mypath, 0.0, -4016.000:5812.000)
        mypath = axlPathLine( mypath, 0.0, -3200.000:5812.000)
        myshape = axlDBCreateOpenShape( mypath, t,"etch/top", "GND")
        axlDBCreateCloseShape( myshape)
        ;*****************************
 But I could't void this shape by below code:
         ;******************************
        axlSetFindFilter(?enabled (list "noall" "Shapes" "Voids") ?onButtons (list "noall" "Shapes" "Voids"))
        while((axlSelect)
        myshape = axlGetSelSet()
            foreach(myshapes myshape
            myvoidpath = axlPathStart( list(-3519.000:5586.000))
            myvoidpath = axlPathLine( myvoidpath, 0.0, -3519.000:5259.000)
            myvoidpath = axlPathLine( myvoidpath, 0.0, -3742.000:5259.000)
            myvoidpath = axlPathLine( myvoidpath, 0.0, -3742.000:5586.000)
            myvoidpath = axlPathLine( myvoidpath, 0.0, -3519.000:5586.000)
            axlDBCreateVoid(myshapes, myvoidpath)
            axlDBCreateCloseShape( myshapes)
            )
        ;****************************
I see warning in Allegro screen:

    E- Unfilled shape can not contain voids
    E- Database object is not a shape.
    
Can you  help me correct it.


Thank you.
Elek
   

Parents

  • You can't void an existing shape like that. To perform that task you should:

    1/ Extract the polygon of the existing shape (Use axlPolyFromDB).

    2/ Create a new open shape from that polygon

    3/ Create your void

    4/ Create the closed shape

    5/ Delete the original shape if all the above steps are successful.

    Dave

  • in reply to eDave

    Hi Dave,

      I try your prompt several times, but I failed. Could you please answer me here? Thanks in advance.

      Firstly, I add a rectangle on one layer by using axlDBCreateOpenShape(), and execute axlDBCreateVoidCircle() to add 9 circle on it. Then, I want to add three bar to overlap the circle. Void the shape and generate the shape like the following picture. But the skill window tell me -- E -(SPMHDB-186): Void must be within the shape. I don't know how to define the bar's  coordinate. Maybe it is out of the range after the circle is void. Please help me. Thanks again.

    path1 = axlPathStart( list(-30:30 -30:-30 30:-30 30:30 -30:30) )

    shp1 = axlDBCreateOpenShape( path1, t, "ETCH/TOP", nil )

    axlDBCreateVoidCircle( shp1 list(-19:19 8) )

    axlDBCreateVoidCircle( shp1 list(0:19 8) )

    ...

    ...

    ...        ;The above is ok, now the circles and shape is generated.

    path2 = axlPathStart( list(-19:21 -19:17 30:17 30:21 -19:21) )

    Poly = axlPolyFromDB(shp1 ?layer "ETCH/TOP")

    shp2 = axlDBCreateOpenShape(??)

      Dave, please help me.

  • in reply to Jason Hsu

    Personally I would approach this in a different way; first create a rectangle polygon, then create a list of polygons which contain the 9 circles and 3 bars.  Then do an axlPolyOperation with 'ANDNOT. 

    axlPolyOperation(poly_of_rect   list_of_VoidPoly 'ANDNOT)

    This will create a resulting polygon as shown above with which you create a shape on the etch layer.

    Bram

Reply
  • in reply to Jason Hsu

    Personally I would approach this in a different way; first create a rectangle polygon, then create a list of polygons which contain the 9 circles and 3 bars.  Then do an axlPolyOperation with 'ANDNOT. 

    axlPolyOperation(poly_of_rect   list_of_VoidPoly 'ANDNOT)

    This will create a resulting polygon as shown above with which you create a shape on the etch layer.

    Bram

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