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I have a polygon (METAL1) in an instance. Im using
dbTransform to get the xy of the polygon w.r.t toplevel, but im not able to. For rectangles it is working fine but for polygons it is not giving the exact xy.
exact xy = 15.9:1.36
with transform = (17.533 4.965)
((db:54977564 cellView db:63255596 objType "inst"
prop nil bBox
nil groupMembers nil isAnyInst t
isShape nil matchPoints nil net
nil parent nil physConns nil
pin nil purpose "cell" textDisplays
nil assocTextDisplays nil baseName "I1"
cellName "XOR" instHeader db:63559468 instTerms
nil libName "test_lib" master db:64806956
name "I1" numInst 1 viewName
"layout" conns nil mag 1.0
orient "R0" status "firm" transform
((16.855 4.76) "R0" 1.0) xy
(db:64837364 cellView db:64806956 objType "polygon"
prop nil bBox
nil groupMembers nil isAnyInst nil
isShape t matchPoints nil net
nil parent nil physConns nil
pin nil purpose "drawing" textDisplays
nil assocTextDisplays nil layerName "ME1"
layerNum 46 lpp
("ME1" "drawing") nPoints
Please let me know why im getting an error for polygons.
Well, you've not said what you're doing. You've just said you're using dbTransform (and there isn't a function called that), without any clue as to what the arguments are. Then you just listed a list with the expanded view of an instance and a polygon. I've no idea what the "xy" of a polygon means - a polygon is made up of a series of points.If you're more explicit about what you're doing - ideally with code and the output it generates - it might be easier to help you. Since the dbTransformPoint() function is pretty simple (if that's what you're using), and widely used, it's very likely to be something you're doing wrong in your code.Best Regards,Andrew.
In the code I have a LayercyclicField where by selecting a layer from that field I calculate the union of all the bBox of that layer. But for polygons it si not giving expected output. Sample inputs have been given in the forum.I hope this helps. Let me know if anything else is required.Yes Andrew I mean dbTransformPoint(). And by xy I mean llx:lly of the polygon.I used the command with the following arguments. dbTransformPoint(1.145:0.505 list(16.388:4.46 "R0" 1.0))output: (17.533 4.965)But the output should be 15.9:1.36Thanks.
Well, it's been a while since I did maths at school, but last time I looked 1.145+16.388=17.533 and 0.505+4.46=4.965.So I cannot see how you can possibly expect 15.9:1.36?If I assume you're trying to transform all the points in the polygon by the "transform" of the instance (rather than the lower left of the instance's bbox), then that would be:foreach(mapcar point polygon~>points dbTransformPoint(point inst~>transform))and that gives:((18.27 5.97) (18.19 5.97) (18.19 6.63) (18.27 6.63) (18.27 7.92) (18.15 7.92) (18.15 8.16) (18.0 8.16) (18.0 5.265) (18.15 5.265) (18.15 5.52) (18.27 5.52))So I can't work out where you get 15.9:1.36 from!Regards,Andrew.
Ok I was looking at the wrong instance. its ok. Nothing wrong with the command.Thanks,