int pcunshaded(int handle, string channel_name)
pciterate iterates over all the points, this function
only iterates over points where the channel in channel_name has
not yet been written to.
The function returns 1 while there are points left in the iteration loop, or 0 when there are no further points. This lets you use the function as the condition in a while loop.
This function will not work correctly when used in multi-threaded OPs. It is not possible to nest
pcunshadedor pciterate loops for the same handle. That is, for a single pcopen call, only one
pcunshadedor pciterate loop may be entered.
Computations involving derivatives inside
pcunshadedloops may have slightly different results. If derivatives are required for variables which aren’t set by pcimport it may be better to pre-compute the derivatives before the
pcunshadedloop is entered.