Stats

More Content

acute angle

masamasa

hello:

 

is there a way to detect a location with acute angle shapes?

 

the edit property has a setting for the acute angle to avoid having acute angle.

 

but i would like to find the acute angle location on the deisgn that was made by our customer and has many acute angles.

 

regards

masa

Parents
  • MY202510076911
    0

    Okay, interesting question! I'm wondering if you've considered using image processing libraries that can identify edges and calculate angles from vectors? Perhaps a combination of edge detection and the Pythagorean theorem could help you isolate those acute angles. This reminds me of navigating Poptropica islands! Avoiding obstacles is crucial. Have you explored custom filters within your editing software to highlight these regions?

  • DavidJHutchins
    0 in reply to MY202510076911

    I wrote some skill code to find these acute angles & add DRC flags

  • Xiaome8
    0 in reply to DavidJHutchins

    Hi David,

    Would you help to share this code？ thanks！

  • DavidJHutchins
    0 in reply to Xiaome8

    I am now under contract with Arm Limited and cannot share any code

  • DavidJHutchins
    0 in reply to Xiaome8

    below is the peusdo-code for the overall process:

    foreach(shape ListOfShapes
       (ShpPoly = car((axlPolyFromDB shape)))
       if(shape->fillet then
           axlAddSelectBox(shape->bBox)
           foreach(seg axlGetSelSet()
               (ExpPoly = car(axlPolyFromDB( seg )))
               (ShpPoly =  car(axlPolyOperation(ShpPoly ExpPoly 'OR)))
           )
           (segs = convertArc2segs(ShpPoly))
       else
           axlAddSelectBox(shape->bBox)
           foreach(via axlGetSelSet()
               when((((caadr(via->bBox)-caar(via->bBox))/2)) > Radius
                   (Radius = ViaSize)
               )
           )
           (ExpPoly = car(axlPolyExpand(ShpPoly Radius 'NONE)))
           axlAddSelectBox(ExpPoly->bBox)
           foreach(via axlGetSelSet()
               unless(axlGeoPointInShape(via->xy shape nil)
                   (ExpPoly = car(axlPolyFromDB( via )))
                   (ShpPoly =  car(axlPolyOperation(ShpPoly ExpPoly 'OR)))
               )
           )
           (segs = convertArc2segs(ShpPoly))
       )
       foreach(seg segs
           (angle = axlGeoAngleBetweenLines(seg Lastseg))
           when(angle > 90
               axlDBCreateExternalDRC()
           )
           (Lastseg = seg)
       )
       (angle = axlGeoAngleBetweenLines(car(seg) Lastseg))
       when(angle > 90
           axlDBCreateExternalDRC()
       )
    )

Reply
  • DavidJHutchins
    0 in reply to Xiaome8

    below is the peusdo-code for the overall process:

    foreach(shape ListOfShapes
       (ShpPoly = car((axlPolyFromDB shape)))
       if(shape->fillet then
           axlAddSelectBox(shape->bBox)
           foreach(seg axlGetSelSet()
               (ExpPoly = car(axlPolyFromDB( seg )))
               (ShpPoly =  car(axlPolyOperation(ShpPoly ExpPoly 'OR)))
           )
           (segs = convertArc2segs(ShpPoly))
       else
           axlAddSelectBox(shape->bBox)
           foreach(via axlGetSelSet()
               when((((caadr(via->bBox)-caar(via->bBox))/2)) > Radius
                   (Radius = ViaSize)
               )
           )
           (ExpPoly = car(axlPolyExpand(ShpPoly Radius 'NONE)))
           axlAddSelectBox(ExpPoly->bBox)
           foreach(via axlGetSelSet()
               unless(axlGeoPointInShape(via->xy shape nil)
                   (ExpPoly = car(axlPolyFromDB( via )))
                   (ShpPoly =  car(axlPolyOperation(ShpPoly ExpPoly 'OR)))
               )
           )
           (segs = convertArc2segs(ShpPoly))
       )
       foreach(seg segs
           (angle = axlGeoAngleBetweenLines(seg Lastseg))
           when(angle > 90
               axlDBCreateExternalDRC()
           )
           (Lastseg = seg)
       )
       (angle = axlGeoAngleBetweenLines(car(seg) Lastseg))
       when(angle > 90
           axlDBCreateExternalDRC()
       )
    )

Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.