HistoryReplace and ReplayHistory


#1

Hello,

With the last releases we have this new functions in Rhino commands. There is no documentation about it. What is his purpose and how they works?

Thanks,


(Dale Fugier) #2

Rhino.Commands.Command.ReplayHistory repeats an operation of a command.

The C++ SDK documention goes further by explaining that Rhino calls uses the virtual ReplayHistory functions to to remake an objects when inputs have changed. If a command supports history, it must override exactly one of the ReplayHistory functions. Simple commands can use the simple version of replay history that just just generates a new object. Complex commands, like Project and Intersect need to override the complex version of replay history that uses a results[] array to return multiple objects.

If you are looking for a code sample, you can find one here.

https://github.com/dalefugier/SampleCsCommands/blob/master/SampleCsHistory.cs