[PCB_FORUM] Re: AxlDBCreateShape Question

  • From: fxf <fxf@xxxxxxxxxxx>
  • To: icu-pcb-forum@xxxxxxxxxxxxx
  • Date: Wed, 06 Jul 2005 17:24:54 -0400

It is more more efficient in both performancce and memory to use a rectangle in the database then a shape.
If you want the additional overhead of forcing a shape then
use the axlDBCreateOpenShape/axlDBCreateCloseShape APIs and pass a t as the second
argument to axlDBCreateCloseShape.

Note axlDBCreateShape is implemented as
axlDBCreateCloseShape( axlDBCreateOpenShape( r_path fill layer netName parent))

so to force a shape do a
axlDBCreateCloseShape( axlDBCreateOpenShape( r_path fill layer netName parent) t)

Anyone knows how to fix this? Or might this be a bug?



I confirm this behavior under 15.2 .

Methinks SKILL is trying to "help" you by up-classifying your shape if it fits one of Allegro's predefined shapes. 

One workaround would be to "clip the corners"  off your shape so SKILL would no 
longer see it as a true rectangle. But now you'd need to craft a function to calculate 
where to clip each corner based on the overall scale of the shape. Not difficult but 
should not be necessary in the first place.

Fortunately, within SKILL itself this RECTANGLE object has an objType of 
"shape" so all your code will process it just fine.


HTH,

Chris Walters
local Cadence guru
(Apple)




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