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Version 1.9 Build 1488

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coordsys.copy - Function

	Package	general
	Module	images
	Tool	coordsys

Copy this Coordsys tool

Synopsis
copy()

Returns
Coordsys tool or fail

Description

Glish uses copy-on-write semantics. This sometimes means that it maintains a reference between variables that you would rather it didn't.

This function returns a copy, not a reference, of the Coordsys tool. It is your responsibility to call the done function on the new tool.

Example

- cs := coordsys()
- cs2 := cs             # Reference
- cs.done()
- cs
F
- cs2                   # cs2 gets doned when c2 does
F 
-
- cs := coordsys()
- cs2 := cs.copy()      # Copy
- cs.done()
- cs
F
- cs2
ref [busy=<function>, result=<function>,...   # cs2 is still viable
- cs2.done()
- cs2                   # Now it's done
F