Detected Layer-to-Layer Polygons that overlap

Maxwell,

I've attached a SKILL function that will find shape that overlap from one layer to layer to the next. After you load the SKILL file type 'cal shapetest' (without the ') on the Allegro command line.  A shapetest.log file is created. If you use the Viewlog to open the log file you can click on the coords in the log file and screen will zoom center to that coord.

You could enhance this function to give percentages by comparing the areas of the overlap poly and the 2 polys that were 'AND. 

 -aCraig

Just curious.

Why do you need to measure the overlap?

Hi MaxwellJ I don't know if there an pre-existing solution, but this is a good Project idea I can give you some pointers

1. first have an user interface to accept any 2 layers, ( a form with one pulldown selecting one layer and another selecting the other)

2. make sure that all the shapes have voltage properties

3. select all the shapes in the first layer/select all the shapes in second layer store them in a list/array

4. I remember there is an procedure in skill help files that would deduct any overlap between 2 shapes

5. modify the procedure to pass only the co-ordinates(consider them to be on the same layer)

6. you can calculate ratio clearly by comparing the Area of overlapping shapes

7. calculate the z distance by adding all the dielectric thickness between them

I can see a good use on my projects since it involves a lot of 48V routing

But unfortunately I am involved in something else and have no time to code I will work on this on a later time

This is the way I know which I think can implement this,

I am sure there might be other ways Good Luck

regards

Venkata

Maxwell,

 Attached is an application that will find overlapping shapes on adjacent layers. Open the log file using Viewlog then select the coord to view center to the shape.

 -aCraig