Continues the work of the material subsystem improvements.
This merge covers the continued development of the material editor. The
primary improvements are the addition of new data types, a new
appearance preview UI, and changes in the array data types.
New data types were added to support more advanced workflows, such as
the Render Workbench.The Image datatype allows the material to embed
the image in the card instead of pointing to an image in an external
file. Multi-buyte strings span multiple lines as the name implies.
It preserves formatting accross those lines. Also several list types
are now supported, with the primary difference being the editors.
List is a list of strings, FileList is a list of file path names, and
ImageList is a list of embedded images.
For the appearance preview, the UI now uses the same Coin library as
is used in the documents, meaning the preview will look exactly the
same as the material will be shown in the documents.
The array data types are now more complete. The default value wasn't
being used as originially envisioned and was tehrefore removed. For
3D arrays, the Python API was implemented.
There were a lot of code clean ups. This involved removing logging
statements used for debugging during development, reduction of lint
warnings, and code refactoring.
The editor can automatically convert from previous format files to the
current format. This has been extended to material files generated by
the Render WB. Old format files are displayed in the editor with a
warning icon. Selecting one will require saving the file in the new
format before it can be used.
Rework of the material handling system.
This first part concntrates on a rework of the material cards.
Rather than use a fixed list of possible properties, properties can
be defined separately in their own files and mixed to provide a
complete list of possible properties. Properties can be inherited.
The cards then provide values for the properties. These can also
be inherited allowing for small changes in cards as required.
The new property definitions are more extensive than previously.
2 and 3 dimensional arrays of properties can be defined. Values
are obtained by calling an API instead of reading from a dictionary.
For compatibility, a Python dictionary of values can be obtained
similar to how it was done previously, but this is considered a
deprecated API and won't support the newer advanced features.
The editor is completely reworked. It will be able to edit older format
material cards, but can only save them in the new format.
For testing during the development phase, a system preference can
specifiy wether the old or new material editors are to be used. This
option will be removed before release.
