How to copy and rotate a shape with special angle like 30 degree in skill coding?

 Not sure of your application but have you tried

dbCopyFig(
d_fig
d_cellView
[ l_transform ]
 )

Use the transform option to rotate the object. '((0 0) "R90" 1.0) would rotate the object 90 degrees.

Hi Richard,

There's dbTransformCellView which will transform everything in a cellView by the specified magnification and angle. Note that this cannot transform objects which are constrained to only be at 90 degree multiples (such as instances), so you should normally do this on flat layout.

So if you want to transform selected shapes, what you could do is write a function which moves them (using dbMoveFig) to a temporary cellView, does a dbTransformCellView() and then moves them back to the original cellView.

This is probably easier than trying to write your own  code to transform every kind of shape by arbitrary angles. There's leHiRotate, but this is an "hi" function and doesn't have a procedural equivalent.

Regards,

Andrew.

Hi Richard, Andrew,

Ha; I did not know dbTransformCellView could do that! Andrew is right, of course; that is indeed the easiest solution—provided that function is available in your version of Virtuoso.

I had started writing a small solution; I’ll append it here in case it helps. It basically implements arbitrary affine transformations on points, plus a small dbCopyFig-like helper function:

matrix = VedaGeomAffineMakeIdentity()
matrix = VedaGeomAffineScale(matrix 2.0 0.5)
matrix = VedaGeomAffineRotate(matrix 30*degrees)

VedaGeomAffineCopyFig(fig cv matrix)

I’ve included a tiny demo in the source tree; it draws some shapes on the y* layers of a given cell view:

load("path/to/geom-affine.ils")
load("path/to/demo/demo.ils")
VedaGeomAffineDemo(geGetEditCellView())

You can find the code (full of TODOs) here (Git repository, snapshot):

• http://dd.crosstwine.com/git/?p=veda/misc/geom-affine.git

• http://dd.crosstwine.com/git?p=veda/misc/geom-affine.git;a=snapshot;h=HEAD;sf=tgz

The license is MIT/Expat. Let me know if you need more info… or have some patches :)

Cheers, -D

ztzg, 

Thank you for your help. As a beginner and not dedicate to layout, it seems hard for me to ultilize your code.

I'll try it when I have time.

Hi Andrew,

 I tried your solution. It seems have precision issues.

When the rotation angle can divide 360 exactly, like 20,30,60 etc., It looks great.

But when I try to place 19 semilar shapes  along a circular edge with same interval, it doesn't work well. 

I'm guessing that you're rotating each shape incrementally, which would mean you accumulate rounding errors. You didn't share your code, so that's purely a guess.

I wrote the following:

procedure(CCFcreateRotatedShape(cv layerName angle inner outer width)
    let((tempCv)
        tempCv=dbOpenCellViewByType(cv~>libName cv~>cellName "scratch" "maskLayout" "w")
        dbCreateRect(tempCv layerName list(inner:-width/2.0 outer:width/2.0))
        dbTransformCellView(tempCv 1.0 angle)
        foreach(shape tempCv~>shapes
            dbCopyFig(shape cv list(0:0 "R0" 1))
        )
        dbClose(tempCv)
        t
    )
)

procedure(CCFrotateExample(@key (cv geGetEditCellView()) (spines 20) (inner 25) (outer 45) (width 4)
            (layer1 "Metal3") (layer2 "Metal2"))
    let((radius)
        radius=(inner+outer)/2.0
        dbCreateEllipse(cv layer1 list(-radius:-radius radius:radius))
        for(i 0 sub1(spines)
            CCFcreateRotatedShape(cv layer2 i*360.0/spines inner outer width)
        )
    )
)

And then ran (using gpdk090):

CCFrotateExample(?spines 19 ?layer1 "Via2" ?layer2 "Via5")

(purely to get some pretty colours). As you can see, this looks pretty evenly spaced and the shapes look regular:

The setup has 2000 DBUPerUU so has a good level of resolution - I don't know what your database resolution is compared with the size of your structure.

Regards,

Andrew.