Gettting the corrdinates to the top level in SKILL

Hi Kapil

You can use dbTransformBBox. Suppose "x" is the id of a lower hierarchical instance. You can do it as follows:

dbTransformBBox(x~>bBox x~>transform)


Best regards
Quek

Actually, the bBox of an instance is already transformed. The bBox of the master of the instance is not. Thus, the following two values should be the same (Supposing inst is the database id of the instance):

box1 = inst~>bBox
box2 = dbTransformBBox(inst~>master~>bBox inst~>transform)
box1 == box2

Basically, to understand how to translate the coordinates up the hierarchy, you need to know a few things and a few commands.

A transform is a list of information about an instance in the hierarchy. It consists of the xy coordinate, rotation and magnification of an instance in the cell that it is placed.

Here is a sample transform:  list(list(89.0 275.5) "R90" 1.0)

You can access the transform of an instance using:  inst~>transform

Any shape or instance one level down in that instance can have its points transformed to top level coordinates using:

dbTransformPoint(pt inst~>transform)
or
dbTransformBBox(bBox inst~>transform)

When you have multiple levels of hierarchy, you will need to concatenate the transforms from each instance in the hierarchy path to get one transform. You can do this with:

dbConcatTransform(transform1 transform2)

Start with the lowest transform in the hierarchy and concat it with the next level transform. Take the new transform and concat it with the next higher level transform and repeat this until you get to the top level. You can then transform points from objects within the lowest level instance all the way to the top.

Two other useful commands for interactive use when editing in place are geEditToWindowPoint and geWindowToEditPoint.

geEditToWindowPoint(
w_windowId
l_editCellViewPoint
)
=> l_windowCellViewPoint

Translates coordinate values when you are using edit in place. geWindowToEditPoint applies the top-level cellview's coordinates to the cellview being edited; geEditToWindowPoint does the reverse.

Derek

Hi Kapil,

Also you can use geTransformUserBBox() similar to dbTransformBBox(). Also, you may be interested in concatenating transforms if you are processing more than one level of hierarchy, so for this there is a dbConcatTransform().

 geTransformUserBBox(
  l_bbox
  l_transform
 )
=> l_bBox_new

 dbConcatTransform(
  l_list1
  l_list2
 )
=> l_list_new


Nice answers Derek by the way.

Regards,

Lawrence.

Thanks a lot Quek,Derek and Lawrence.ill try out the functions and be back .

Regards,

Kapil

 Hi,

 there is also the function geWindowToEditPoint if you wish to process your skillcode while in EIP mode.

 BR,

rence