When nodes are loaded from a .blend file they can potentially have undefined types. This can happen if a type has been deprecated and removed, or if node types were defined in a python script that has not been loaded correctly. Previously all such nodes would automatically be removed from a node tree, assuming that their types were deprecated and no longer in use (more commonly caused by loading new nodes in an older Blender version). Due to the possibility of dynamic registration it is no longer feasible to simply delete such nodes.
Display and handling of node trees was simply disabled before this patch, so that a node tree where any node or socket type was undefined would not be displayed at all. To give more information and avoid problems caused by necessary checks for the typeinfo pointer, there is now a 'Undefined' fallback type for trees, nodes and sockets. These types are used as placeholders in case the real type is not registered and can provide useful visual feedback on undefined nodes.
PyNodes opens up the node system in Blender to scripters and adds a number of UI-level improvements.
=== Dynamic node type registration ===
Node types can now be added at runtime, using the RNA registration mechanism from python. This enables addons such as render engines to create a complete user interface with nodes.
Examples of how such nodes can be defined can be found in my personal wiki docs atm [1] and as a script template in release/scripts/templates_py/custom_nodes.py [2].
=== Node group improvements ===
Each node editor now has a tree history of edited node groups, which allows opening and editing nested node groups. The node editor also supports pinning now, so that different spaces can be used to edit different node groups simultaneously. For more ramblings and rationale see (really old) blog post on code.blender.org [3].
The interface of node groups has been overhauled. Sockets of a node group are no longer displayed in columns on either side, but instead special input/output nodes are used to mirror group sockets inside a node tree. This solves the problem of long node lines in groups and allows more adaptable node layout. Internal sockets can be exposed from a group by either connecting to the extension sockets in input/output nodes (shown as empty circle) or by adding sockets from the node property bar in the "Interface" panel. Further details such as the socket name can also be changed there.
[1] http://wiki.blender.org/index.php/User:Phonybone/Python_Nodes
[2] http://projects.blender.org/scm/viewvc.php/trunk/blender/release/scripts/templates_py/custom_nodes.py?view=markup&root=bf-blender
[3] http://code.blender.org/index.php/2012/01/improving-node-group-interface-editing/
Zooming in on images in Image window now shows pixels again (was filtered).
Now the glaDrawPixelsTex() and glaDrawPixelsAuto() have an argument to
define if images should zoom in with linear filter, or draw pixels.
Automatic switching for drawing pixel buffers via glDrawPixels or using GPU textures
It works with a User Preference limit, in megapixels, to define whether to use
GPU or direct pixel drawing. Default is now initialized to 10 MP (4k buffers).
Especially for zooming out (draw smaller) texture drawing is much smaller. Also
Nvidia cards typically draw much faster with textures in general.
Added to node backdrop first now, the other editors follow in a next commit.
For coders: added new DNA function to initialize new struct variables, so you
don't have to sub-version files anymore.
DNA_struct_elem_find(fd->filesdna, "structname", "typename", "varname")
"filesdna" is the sdna description of the current file being versioned.
Tiny tweak.
Dragging option (cursor change) for region dividers in editors was having an
un-even sensitivity hotspot. This conflicted with header buttons for example,
where the hotspot and bottons overlapped.
Now the hotspot is around the region-edge evenly.
Fix for 2.66a
Screencast could be started twice in a row, but it then also added two handlers
for drawing an overlay circle around mouse cursor. After ending the screencast,
this circle then kept being drawn.
Getting the 'CTX_data_main' while un-fullscreen'ing a space would do a context lookup into the view3d_context which had an uninitialized layer.
since view3d_context doesn't hold a 'main' member it never did anything but cleaner not to do context lookups while modifying the view.
- noticed while checking on a real bug :)
The operator names all show up in the Search button. As such is nicer if they
can all have the main words capitalized.
e.g. "Snap strips" should be "Snap Strips"
"Copy to clipboard" should be "Copy to Clipboard"
This was done with a mix of bash tools, regex, and manual work because I'm too rushed into regex :)
+ fix bge stereo eye separation tooltip
in user preferences in place.
New scroller code made user pref scroller jump back on activating add-ons,
because that causes a full blender system refresh.
- The main window has sliders, which was drawn behind the region
- If property region had slider too, it got even worse.
Basically the node editor is UI view, so drawing another UI on top isn't
functioning well in general.
Now scrollbars correctly hide and show, making space for the actual contents
in a region. It solves several old hacks, and puts view2d code a bit more
back in control as well.
Implementation notes:
- The view2d mask feature is working again
- The #define V2D_SCROLL_HORIZONTAL_HIDE means: "turn on hiding".
- Code for UI_view2d_region_reinit() is enforcing better standard view settings
But... two hack/patches needed to be added:
- Region panel drawing: if after generating the button panels it appears
a scroller hides or reveils, it calls all the generating code again.
(a simple scale doesn't work due to rounding differences in layout code)
- View2d code that maps 'tot' and 'cur' rects: if this code detects that
the mask changes, it calcs the map code again.
Also a bugfix (issue in 2.65)
- The left/bottom area split widget was drawing 1 pixel too large sometimes,
leaving bad trails on moving area dividers.
This codec is absolutely needed to generate DCP using OpenDCP,
before that external application to convert JP2 to J2K was used
which slowed down export a lot.
New codec is exposed to image format settings panel and called
Codec. Default one is JP2 which creates files with .jp2 extension,
new one is called J2K which creates with .j2c extension.
Other changes:
- Fixed avi jpeg warning which was treating as error here.
- Made it so extension is detecting from ImageFormatData instead
of image file type, which makes it possible to have different
extension for the same file type depending on it's settings.
IRIS format should still be changed (depending on number of
channels it'll be .bw, .rgb or .rgba extension)
- Default image format settings would be set from image buffer
when re-saving it. Makes it possible to easily open .j2c file
and save it using J2K codec (without this change it'll save as
.jp2 using JP2 codec)
- The corner 'duplicate/merge area' widget was drawing too often.
(Added comment in subwindow 'active' code, too many redraws are being
sent on moving mouse over region eddges)
- Since 2.50, the .blends have the current file name stored
- In versions up to 2.65.0 this didn't save for files saved from startup
(i.e. files saved without loading a file)
Code now adds the file name after all, except for recovery loads.
Recoded the (2.65.1 version) region scale, which happened on loading files with
different saved size windows. Also scaling window itself was affected.
Old method: scaled region widths based on area/editor scaling factors.
That was leading to too small or too large button regions easily.
New method: region width/height now are in DPI control. Much nicer!
- On changing dpi, buttons remain visually same widths.
- On changing window sizes, the button views and zooms stick to exactly same.
Caveat: people who were using Blender with 'extreme' dpi setting, might find
the layouts slightly differ. Not sure if this is worth version patching...
Todo: overlapping regions that overlap together draw badly. Fix underway.
ED_region_visible_rect(ar, rect)
Returns the visible rect inside a region, subtracting the overlapping UI regions.
Added with minimal overhead, only called once per region draw.
Also fixes the 'Auto Key' warning print in 3d window (was behind properties)
- on setting lower DPI, the regions that were scrolled down would start moving down
1 pixel on every draw. Caused by rounding error. (int + 0.1 vs int -0.1)
(Ancient bug)
- circles used in outliner - to denote selection/active - now draw bigger, and better
centered. (2.66 fix only)
