Adds 3D-Tiling options to the sculpt tool. This is very similar to the
symmetry options in the sense that it replicates the strokes. For tiling
this replication happens with a linear offset to fill the whole object
along one or more axis.
This allows to create geometry that can be tiled seamless. One use case
is the creation of tileable textures by sculpting high resolution
geometry and then rendering it with an orthographic camera to create
maps for diffuse, normal, etc
Notes:
Patch by Tilman Blumhagen with minor changes (move tile flags to paint
symmetry flags).
After some feedback from artists, leaving tiling value to constant
offset, though I suspect that some method that uses the object
bounding box dynamically might be good to have too. It can
be added later though :)
Thanks a lot for the patch!
Patch: D1426
multires.
Code had special guards for such edges to stop this from happening. I
don't see why this is needed though since code above assigns smoothed
positions for all vertices in the grid.
After removing the guards I saw that this in fact was the only place
where grd adjacency was used, so I completely removed it.
Rename calc_flatten_center to calc_area_center,
since theres no 'flatten' spesific logic there.
Also refactor calc_area_center, calc_area_normal, calc_area_normal_and_center
so they're next to eachother - they're almost the same,
having them scattered about isn't helpful.
Pinch would give a flat result on either side of the stroke,
because points were dragged towards a single point.
Now pinch is projected on the sculpt plane, which gives a tighter crease.
The reverse is true too - blob brush which shares the code is also more curved.
Thing is, those functions always reallocate the whole keyblock's data mem,
while in some cases we already have right amount of elements, so we can just
copy over. Further more, `BKE_key_convert_from_offset`, despite its name,
was not making any check nor allocation on keyblock's data elements!
So split 'copy' operation itself in `BKE_key_update_from_...`,
where no mem checks/operations are performed (only an assert).
Only useful in sculpt mode currently, but will be used by fix for T35170 too.
Make the UI API more consistent and reduce confusion with some naming.
mainly:
- API function calls
- enum values
some internal static functions have been left for now
Operators that trigger UI events (but nothing else)
were using 'CANCELLED' making it impossible to tell if an invoke
function failed, or opened a menu.
