ImageEngine/cortex — pull request #152 by andrewkaufman (2013-10-19 02:01:49+00:00)
Title: GU_CortexPrimitives in SOP_ParameterisedHolders

This request breaks binary compatibility in IECoreHoudini by introducing new virtual functions, and completely changing the behaviour of SOP_ParameterisedHolders. The new workflow takes advantage of our custom Houdini primitives, and eliminates the need for the NodePassData hack in the blind data. From a user perspective, the main changes are:

- ParameterisedHolder SOPs have a nameFilter parm (w/ disable toggle)
- These are used to pre-filter each input geometry (or not if toggled off)
- ProceduralHolder outputs a single CortexObject holding its procedural
- OpHolder operates several times per cook, once for each named input shape
- Shapes matching the filter are operated on, and returned as CortexObjects, maintaining their name
- Shapes not matching are passed through unchanged, whether they were normal geo or CortexObjects
- It can be forced to operate only once by disabling the nameFilter or by passing a single named shape
- CortexConverter SOP now operates in both directions (converting between CortexObjects and native geo)
- It also has a nameFilter, with similar pass-through behaviour as the OpHolder

Fixes #36