I had write one line of query language in ProtelDXP as the following:
IsTrack and ((ABS(X1-X2)-ABS(Y1-Y2))=0)
Its target is to find out all the tracks with their lean at 45-degree or 135-degree.
After the execution of the program, some tracks are found while some tracks satisfied
with the constrain are leaked. I guess that the reason is the precision of floating
point number calculation. So I change it to the following format:
IsTrack and ((ABS(X1-X2)-ABS(Y1-Y2)) between -1 and 1).
But this time, strange things happen: the queried tracks are nearlly all the tracks
with 0 degree, not 45-degree or 135-degree. Who can tell me why. Is it a bug of DXP?
Thank you very much!
Roboy of BUAA
[EMAIL PROTECTED]
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/leave.html
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Forum Guidelines Rules:
* http://www.techservinc.com/protelusers/forumrules.html
*
* Browse or Search previous postings:
* http://www.mail-archive.com/[EMAIL PROTECTED]
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
