Yep, at last it's here!
There are a few minor issues remaining but development can go on in
master after discussion at blender institute.
For full list of features see:
http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.72/Painting
Thanks to Sergey and Campbell for the extensive review and to the
countless artists that have given their input and reported issues during
development.
Ways how it was resetting its values (backspace) was far from satisfaying. Now, e.g. when scaling, it will reset at 1 (or whatever mouse-value it was before entering numinput), instead of some ugly 0.0 value.
Implementation details:
* Values passed to applyNumInput() are stored as default ones (val_org), if it is not EDITED.
* applyNumInput() returns a boolean saying whether it actually set values or not.
* When backspace hits its ultimate step (where it clears all EDITED flags and reset all default values),
it sets a temp FAKE_EDITED flag that will be used to apply one last time values of numinput
(so that default values actually get applied!).
There are important things to note here for code using numinput:
* Values passed to applyNumInput() should be valid and are stored as default ones (val_org), if it is not EDITED.
* bool returned by applyNumInput should be used to decide whether to apply numinput-specific post-process to data.
* *Once applyNumInput has been called*, hasNumInput returns a valid value to decide whether to use numinput as drawstr source or not.
Those two steps have to be separated (so do not use a common call to hasNumInput() to do both in the same time!).
confusion, grid snap is now the default as it seems to be the most wanted and easy to use mode.
Absolute grid snapping happens in a somewhat generic function 'applyGridAbsolute', which could also be used for objects and other transforms later on. It is conceptually similar to the 'project' snapping
option, in that it calculates a delta vector for each element on top of the overall transform, which places each node on the grid.
Node transform now uses the top-left node corner for TransformData->loc. The transform center is still the average of node centers, so that scaling and rotation works nicely.
snapGrid*** functions have been renamed to snapGridIncrement*** to distinguish better between incremental and absolute grid snapping.
The transform operators in nodes will now use the unselected nodes to generate snapping points. Unlike object snapping, node snapping works for the x/y axes separately and snaps node borders to same borders of unselected nodes. The sensitive area for node borders extends over the whole view2D range, to enable simple alignment of nodes in both x and y direction.
For snap points in the node editor an additional enum value is stored to indicate the type of node border (left/right/top/bottom). This works as a constraint on possible node alignments: only same border types align with each other.
