Flatten unwrap selected objects (for UDK lightmaps)

(credit to this guy for my starting point)

Scenario

• You need some quick-n-dirty unwraps for lightmap baking
• You need channel 2 unwrapped uniquely
• You will improve them later

Usage

• Select one or more objects
• Run script
• Script applies a flatten-map unwrap to channel 2
• Warning: scripts collapses objects down to editable poly

  
-- MixeScript snippet: Flatten unwrap selected objects 
-- applies a flatten-map unwrap to selected objects, then collapses them down to editable poly.

--USAGE
-- Select one or more objects
-- Run script
-- Script applies a flatten-map unwrap to channel 2
-- Warning: scripts collapses objects down to editable poly

-- SETTINGS
UnwrapChannel = 2
 
objarray = getCurrentSelection()
max modify mode    
  
for obj in objarray do 
(
 convertto obj editable_mesh
    modPanel.setCurrentObject obj
    subObjectLevel = 4
    UnwrapMod = Unwrap_UVW name:"UnwrapMod"
    UnwrapMod.setApplyToWholeObject true
    addModifier obj UnwrapMod
    Temp = obj.modifiers["UnwrapMod"]
    Temp.setMapChannel UnwrapChannel
    Temp.setTVSubObjectMode 3
    Temp.flattenMap 45.0 #() 0.01 true 0 true true     
    subObjectLevel = 0
 UnwrapMod.packnoparams()
 UnwrapMod.pack 1 0.02 true true true
 convertto obj editable_poly 
)
select objarray