subset mapping of VArray
•Always kept direct by
compositing mappings, in order to prevent long chains (see the
figure below).
•Subset slicing (by
such as va[0..10,3]) is done by subset mapping, not by making actual
data extraction, if not explicitly specified otherwise.
Therefore,
–Computationally
efficient
–Suitable for writing
in subsets of data in files.
• In other words, actual data cutting is deferred until needed – to defer operations
until needed is a policy of GPhys construction
VArray
VArray
VArray
