from Paolo Ciccone (pciccone)
Im not that keen on this functionality since vertex groups in blender are for weight painting and OBJ's groups are more like sub-objects, The conversion between these is a poor approximation (one vertex group per face).
But this is still useful for using blender with poser so accepting these 2 patches.
Made some changes from the patch
*Export*
- vgroup off by default, since this is mainly useful for corner cases
- findVertexGroupName() - changed how exporting selects a vertex group for a face, use the highest combind weight for each group instead of the number of checking how many times the verts are in a group because they could have a zero weight.
- findVertexGroupName() - would fail if a faces verts were not in any groups, now return a (null) group
- Allow modifiers to export with vgroups
*Import*
- disable by default
- ignore (null) groups
- fixed a problem where the patch broke SPLIT_GROUPS
- move the group definition out of global namespace, breaks importing as a module.
--- Patch submission info
The import/export scripts included with Blender 2.48 don't save/preserve groups defined in OBJ file. This presents a
couple of issues: users loading an obj file with groups are not able to use a rather important set of data. When the
file is then saved the groups are lost bringing up both the issue of data loss and loss of functionality as groups are
used for rigging and morph target creation for Poser/DAZ Studio and all compatible applications. Of course other
animation/modeling packages that use OBJ files might be affected.
The solution that I present here simply patches the excellent python scripts written by Campbell Barton and Jiri Hnidek.
The new code implements the preservation of groups by creating Blender vertex groups during import and by re-writing
those groups in the OBJ file during export. Of course group ownership is idetermined at the face/polygon level and not
at the vertex level.
This rather simple solution makes Blender instantly one of the better tools to create Poser Morph targets (Full Body
Morphs) and conforming figures and clothing. Of course it's also adding a more complete support for the whole OBJ spec.
The patches are fitting well inside the established logic, have a minimal impact and are totally transparent to the
user. See the attached video (about 7 minutes long) for more details.
I noticed that the original scripts are formatted with tabs. I think it would be a good idea to follow the standard
Python recommendation and convert the scripts to use spaces. I didn't want to do it on my side as it would generate
a patch that replaces the whole file, not something that I wanted to do with my first submission :) But it would help
if people with access to SVN could do it.
Here is a short video that demonstrates the updates:
http://www.paolociccone.com/blender_obj_scripts.html
Cheers!
----
After quite a bit of searching, I finally found where the various UI functions were wrapped for use in Py Layouts.
For the reference of others, check out editors/interface/interface_api.c
nobody seriously uses this format for graphics these days, and if they did, the export from blender is unlikely be to be useful, its just different views of the mesh edges projected into a 2D xfig file (quantized to int's too).
from Kevin Morgan (forTe)
imports images as quads in the 3D view
made some changes
- images that fail to import give an error popup rather then a script error
- extension input is only shown for batch directory importing
- extension comparison is now case insensitive
- importing images from "/" failed, (bug in Blender.sys.dirname), use os.path.dirname since os is needed for batch import in other places.
- disable Esc for quitting because escaping from the file selector would quit the script too.
Minor changes are...
- default size is smaller then it was but still too big IMHO, presets are huge.
- deselect all objects and make the new bolt active
- place the new bolt at the 3D cursor location
*Added initial material buttons (Material Color, Ray Transparency, Ray Mirror, Subsurface Scattering)
Only works for default material atm.
*some layout tweaks to the lamp panels.
* Split the buttons_data.py into separate files, this makes it easier to maintain them.
Notes: Added an extra modifier file, because modifiers are for different object types.
* Added basic lamp buttons and Sun/Sky settings.
As the camera buttons they only work for the default light object for now.
* Some minor code cleanup
even though the format allows materials and textures to be written separately the textures wont load right in maya or 3dsmax unless each texture has its own material.
* Added camera buttons.
* Added poll to check on active object type.
ToDo:
* Lens Unit "lens" and "angle" don't update each other. Needs RNA fix.
* Buttons only work for default camera now, needs better context.
- when the attribute check function failed it didnt set an error raising a SystemError instead
- Rasterizer.getMaterialMode would never return KX_BLENDER_MULTITEX_MATERIAL
- PropertySensor value attribute checking function was always returning a fail.
- Vertex Self Shadow python script didnt update for meshes with modifiers.
This has been wrapped under Scene.RenderData, and can currently be accessed under the 'Image' panel in the Scene settings.
As in the old code, image types are only included if they are enabled when compiling. Also note that image-type specific settings have not been wrapped yet.
* Made separator item work horizontal & vertical.
* Add colon (:) automatic for int/float/enum/string.
* Added space variables to uiStyle and use them in the
layout engine.
* Added initial World buttons by Thomas Dinges, thanks!
* Added some code for modifiers in the Object Data context.
This will become a template though.
* Use a common poll() callback in the scripts to reduce code.
* Headers and menus can now be created in python.
* Replaced the uiMenuItem functions to create menus with equivalent
uiItem functions using a layout, removing duplicated code.
* More uiItem functions are now exposed to python.
* The text editor header, panels and one of its menus are now created
in space_text.py.
* Buttons window data context icon new changes depending on active
object.
Issues
* Icons are not wrapped yet, hardcoded ints at the moment.
* The ID browse template is unfinished.
* Changed the buttons window contexts to be like the mockups:
scene, world, object, data, material, texture, particles, physics
* Removed temporary C layout code for buttons and scene.
