#                        R E I D . T C L
# BRL-CAD
#
# Copyright (c) 2005-2011 United States Government as represented by
# the U.S. Army Research Laboratory.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# version 2.1 as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this file; see the file named COPYING for more
# information.
#
###
#
# assign region IDs to all regions under some assembly starting at
# some given region ID number.
#


proc  reid { args } {

    set extern_commands [list db get_regions attr]

    foreach cmd $extern_commands {
	catch {auto_load $cmd} val
	if {[expr [string compare [info command $cmd] $cmd] != 0]} {
	    puts stderr "[info script]: Application fails to provide command '$cmd'"
	    return
	}
    }

    set argc [llength $args]
    if { ($argc != 2 && $argc != 4) || ($argc == 4 && [lindex $args 0] != "-n") } {
	puts "Usage: reid \[-n <num>\] assembly regionID"
	return
    }

    if { [llength $args] == 4} {
	set incrval [lindex $args 1]
	set name [lindex $args 2]
	set regionid [lindex $args 3]
    } elseif { [llength $args] == 2} {
	set incrval 1
	set name [lindex $args 0]
	set regionid [lindex $args 1]
    }

    set objData [db get $name]
    if { [lindex $objData 0] != "comb" } {
	puts "Not a combination."
	return
    }

    set regions [get_regions $name]
    foreach region $regions {
	attr set $region region_id $regionid
	incr regionid $incrval
    }
    return [expr $regionid - $incrval ]
}

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