The evaluated mesh is a result of evaluated modifiers, and referencing
other evaluated IDs such as materials.
It can not be stored in the EditMesh structure which is intended to be
re-used by many areas. Such sharing was causing ownership errors causing
bugs like
T93855: Cycles crash with edit mode and simultaneous viewport and final render
The proposed solution is to store the evaluated edit mesh and its cage in
the object's runtime field. The motivation goes as following:
- It allows to avoid ownership problems like the ones in the linked report.
- Object level is chosen over mesh level is because the evaluated mesh
is affected by modifiers, which are on the object level.
This patch allows to have modifier stack of an object which shares mesh with
an object which is in edit mode to be properly taken into account (before
the change the modifier stack from the active object will be used for all
objects which share the mesh).
There is a change in the way how copy-on-write is handled in the edit mode to
allow proper state update when changing active scene (or having two windows
with different scenes). Previously, the copt-on-write would have been ignored
by skipping tagging CoW component. Now it is ignored from within the CoW
operation callback. This allows to update edit pointers for objects which are
not from the current depsgraph and where the edit_mesh was never assigned in
the case when the depsgraph was evaluated prior the active depsgraph.
There is no user level changes changes expected with the CoW handling changes:
should not affect on neither performance, nor memory consumption.
Tested scenarios:
- Various modifiers configurations of objects sharing mesh and be part of the
same scene.
- Steps from the reports: T93855, T82952, T77359
This also fixes T76609, T72733 and perhaps other reports.
Differential Revision: https://developer.blender.org/D13824
This gives a modest speedup as calculating tessellation and face
normals at the same time can be more efficiently multi-threaded.
Also avoids calculating face normals twice,
oversight in d590e223da.
Normal layers currently aren't stored in the undo step
mesh storage, since they are not stored in files at all.
However, the edit mesh expects normals to be fully
calculated, and does not keep track of a dirty state.
This patch updates the normals in the BMesh created
by loading an undo step.
Another option would be calculating the normals on
the undo mesh first, which might be better if Mesh
normal calculation is faster than BMesh calculation,
but the preferred method to access vertex normals fails
in this case, because the mesh runtime mutexes are not
initialized for undo-state meshes.
Differential Revision: https://developer.blender.org/D13859
As described in T91186, this commit moves mesh vertex normals into a
contiguous array of float vectors in a custom data layer, how face
normals are currently stored.
The main interface is documented in `BKE_mesh.h`. Vertex and face
normals are now calculated on-demand and cached, retrieved with an
"ensure" function. Since the logical state of a mesh is now "has
normals when necessary", they can be retrieved from a `const` mesh.
The goal is to use on-demand calculation for all derived data, but
leave room for eager calculation for performance purposes (modifier
evaluation is threaded, but viewport data generation is not).
**Benefits**
This moves us closer to a SoA approach rather than the current AoS
paradigm. Accessing a contiguous `float3` is much more efficient than
retrieving data from a larger struct. The memory requirements for
accessing only normals or vertex locations are smaller, and at the
cost of more memory usage for just normals, they now don't have to
be converted between float and short, which also simplifies code
In the future, the remaining items can be removed from `MVert`,
leaving only `float3`, which has similar benefits (see T93602).
Removing the combination of derived and original data makes it
conceptually simpler to only calculate normals when necessary.
This is especially important now that we have more opportunities
for temporary meshes in geometry nodes.
**Performance**
In addition to the theoretical future performance improvements by
making `MVert == float3`, I've done some basic performance testing
on this patch directly. The data is fairly rough, but it gives an idea
about where things stand generally.
- Mesh line primitive 4m Verts: 1.16x faster (36 -> 31 ms),
showing that accessing just `MVert` is now more efficient.
- Spring Splash Screen: 1.03-1.06 -> 1.06-1.11 FPS, a very slight
change that at least shows there is no regression.
- Sprite Fright Snail Smoosh: 3.30-3.40 -> 3.42-3.50 FPS, a small
but observable speedup.
- Set Position Node with Scaled Normal: 1.36x faster (53 -> 39 ms),
shows that using normals in geometry nodes is faster.
- Normal Calculation 1.6m Vert Cube: 1.19x faster (25 -> 21 ms),
shows that calculating normals is slightly faster now.
- File Size of 1.6m Vert Cube: 1.03x smaller (214.7 -> 208.4 MB),
Normals are not saved in files, which can help with large meshes.
As for memory usage, it may be slightly more in some cases, but
I didn't observe any difference in the production files I tested.
**Tests**
Some modifiers and cycles test results need to be updated with this
commit, for two reasons:
- The subdivision surface modifier is not responsible for calculating
normals anymore. In master, the modifier creates different normals
than the result of the `Mesh` normal calculation, so this is a bug
fix.
- There are small differences in the results of some modifiers that
use normals because they are not converted to and from `short`
anymore.
**Future improvements**
- Remove `ModifierTypeInfo::dependsOnNormals`. Code in each modifier
already retrieves normals if they are needed anyway.
- Copy normals as part of a better CoW system for attributes.
- Make more areas use lazy instead of eager normal calculation.
- Remove `BKE_mesh_normals_tag_dirty` in more places since that is
now the default state of a new mesh.
- Possibly apply a similar change to derived face corner normals.
Differential Revision: https://developer.blender.org/D12770
When the 'threshold' is not used in the type we are comparing, just hide
it. This was obvious for some types (e.g. Materials), but maybe not so
on others (e.g. Polygon Sides) and potentionally confusing.
Reported by @hitrpr in chat.
Differential Revision: https://developer.blender.org/D13760
An important check to reject edge linehits when a vertex of that edge
was already hit was accidentally removed in
rB6e77afe6ec7b6a73f218f1fef264758abcbc778a
Some doc-strings were skipped because of blank-lines between
the doc-string and the symbol and needed to be moved manually.
- Added space below non doc-string comments to make it clear
these aren't comments for the symbols directly below them.
- Use doxy sections for some headers.
Ref T92709
Instead of using RPT_ERROR, use RPT_WARNING which will not raise an
exception to Python. This broke some scripts (including FBX import)
which already check for a None return value.
Ref D13458
Reviewed By: campbellbarton
It's important the coordinates the knife is operating on are never
manipulated since it will cause problems which are difficult to
troubleshoot.
Instead, use a cast in the MEM_freeN(..) call.
This reverts commit 8600d4491f.
This broke with {rB20fac2eca723} (which landed in 2.63), so long
standing bug.
Convention for paint modes is:
- when no paint mask is active, `Frame Selected` will focus the last
stroke
- when paint mask is active, `Frame Selected` will focus the selected
mask faces
To check the right vert coords we have to offset with `mp->loopstart`.
Maniphest Tasks: T93130
Differential Revision: https://developer.blender.org/D13247
According to Blender selection rules, selections should be flushed
to containing elements. Added an EDMB_select_flush() after edit
mode booleans or intersects are done. Hopefully this doesn't break
any scripts that might have been depending on the old (broken) behavior.
Allow the use of floating-point values for font point sizes, which
allows greater precision and flexibility for text output.
See D8960 for more information, details, and justification.
Differential Revision: https://developer.blender.org/D8960
Reviewed by Campbell Barton
When adding certain customdata layers (namely UVs, vertex colors and
sculpt vertex colors), the user does not get notified the specific limit
has been hit (blender just silently does nothing).
Now inform the user [decided to not do this in poll() since it could get
messy once operators are extended to operate on all selected objects, so
left this as a visible error in execute() -- or from python].
Maniphest Tasks: T92318
Differential Revision: https://developer.blender.org/D13147
Replace local static mouse coordinate storage with a single function.
also resolve inconsistencies.
- Edit-mesh selection used equality check (ignoring `U.move_threshold`).
- Motion to clear tooltips checked the value without scaling by the DPI.
Also prevent the unlikely case of the previous motion check matching
a different area by resetting the value when the active region changes.
Knife angle measurements were mis-aligned if a cut point was in space.
Specifically, the arc drawing would not match with the cut line.
Fixed by removing a correction for kcd->prev.cage.
This correction was originally added for panning with measurements to work.
In hindsight it is not needed and only introduces issues like this.
Use arrays for wmEvent coordinates, this quiets warnings with GCC11.
- `x, y` -> `xy`.
- `prevx, prevy` -> `prev_xy`.
- `prevclickx, prevclicky` -> `prev_click_xy`.
There is still some cleanup such as using `copy_v2_v2_int()`,
this can be done separately.
Reviewed By: campbellbarton, Severin
Ref D12901
This adds constrained angle mode improvements,
snapping to global and local orientation,
visible distance and angle measurements,
undo capability,
x-ray mode,
multi-object edit mode.
See https://developer.blender.org/D12600 for more details.
Note: this project moved some of the default keymappings
around a bit, as discussed with users in the thread
https://devtalk.blender.org/t/gsoc-2021-knife-tool-improvements-feedback/19047
We'll change the manual documentation in the next couple of days.
Expose a key-map preference "Fallback Tool (RMB)",
disabled by default.
The right mouse button uses the fallback tool
(currently visible selection tool in the toolbar),
instead of always tweaking.
When any selection tool is active, right mouse always tweaks.
To enable fallback selection on RMB, set the "Right Mouse Select Action"
to "Selection Tool".
Internal changes:
- Add fall-back key-maps, separate key-maps needed for when the tool is
run as a fall-back. This is needed so RMB-select can support fall-back
tools, so left-mouse can be used when it's the active tool and RMB
can be used as a fall-back action when another tool is active.
- Add options field to tools so tools without gizmos can enable the
full-back tool keymap.
- Support multiple key-maps for keymap handlers.
- Fall-back keymaps now co-exist with the tool-keymaps.
So both keymaps may be active at once - using different mouse buttons.
When gizmos are in use, a highlighted gizmo prioritizes the
tool-keymap over the fall-back keymap.
Resolves T83690.
Reviewed By: JulienKaspar
Ref D12493
- Show "Lasso Select" in menus (along with Box & Circle select)
- Show "Extrude to Cursor" (along with other extrude actions).
- Rename operators that add/extrude on Ctrl-Click
since their names were inconsistent.
This is mainly for discoverability.
