Product Documentation
Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023

get_changed_area

get_changed_area
[ -halo f_micron ] 
[ -tcl_list [ true | false ] ]

Description

Creates annotations for the rectangular areas within which wiring has changed during an ECO command sequence. You must first issue an eco_begin command before making changes that you want to track, then use this command to create annotations for the changed areas as layer annotation:viaOpt objects that will be listed by layer as Changed area:ECO changed area annotations in the Optimizations page of the Annotation Browser.

Arguments

-halo f_micron

Expands changed regions by the halo value and creates a single annotation where expanded regions merge and overlap, instead of individual annotations for those regions.

Default: 0

-tcl_list [ true | false ]

Returns a Tcl list that specifies the areas changed for specific layers in the following format:

{{{s_layerName} {f_xlo f_ylo f_xhi f_yhi}…}…}

Examples

The following figure shows the difference in results when the -halo argument is specified.

Related Topics

ECO Route Commands

check_litho_errors

eco_begin

read_check_area

read_litho_errors


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