fabric-engine/SpliceSoftimage — pull request #10 by phtaylor (2014-12-15 15:55:23+00:00)
Title: Multi output op evaluation2

@andrewmacp, @helgemathee : Can you take some time to look through my changes.

I've tried to keep the changes to a minimum.
Here is an overview of the problem
1. Softimage evaluates an operator for every connected output(yes, I know, stupid!)
2. Softimage may not evaluate all connected output ports. (if something is hidden for example)
3. Softimage will evaluate the outputs in a random order.
4. Softimage provides almost no way to know if an input has changed.'

Solution
1. Use 'GetEvaluationID' to track changes in geometries and ICE attributes.
2. use a values cache to track changes in simple values.
3. use our own RTVals to compare and check for changes in Matricies.
4. update the EvalConstex when a value changes.
5. Only transfer data that has actually changed.