Blender currently has 2 algorithms for merging vertices:
- `BKE_mesh_merge_verts`;
- `blender::geometry::create_merged_mesh`
`BKE_mesh_merge_verts` has a simplified algorithm to work with Array,
Mirror and Screw modifiers. It doesn't support merge results that would
create new faces. However it has shortcuts to be more efficient in
these modifiers.
`blender::geometry::create_merged_mesh` tries to predict all possible
outcomes. So it's a more complex. But it loses in performance to
`BKE_mesh_merge_verts` in some cases.
The performance comparison between these two depends on many factors.
`blender::geometry::create_merged_mesh` works with a context that has
only the affected geometry. Thus a smaller region of the mesh is read
for duplicate checking. Therefore, the smaller the affected geometry,
the more efficient the operation.
By my tests `blender::geometry::create_merged_mesh` beats
`BKE_mesh_merge_verts` when less than 20% of the geometry is affected
in worst case `MESH_MERGE_VERTS_DUMP_IF_EQUAL` or 17% in case of
`MESH_MERGE_VERTS_DUMP_IF_MAPPED` .
For cases where the entire geometry is affected, a 30% loss was noticed,
largely due to the creation of a context that represents the entire mesh.
Co-authored-by: Germano Cavalcante <germano.costa@ig.com.br>
Pull Request #105136
When using the frame channel operators from #104523
the framing would fail under the following circumstance.
* In the graph editor
* Using normalized view
* with a curve that has a y-extent of less than the focus threshold of 0.01
The issue was the the clamping code was
before the normalization multiplication.
Pull Request #105121
When using the "Frame Channel" operator in the Dope Sheet
the view would always go back to the top.
Fix it by copying the y bounds when in the Dope Sheet.
Pull Request #105123
Using spans instead of raw pointers helps to differentiate ararys from
pointers to single elements, gives bounds checking in debug builds, and
conveniently stores the number of elements in the same variable.
Also make variable naming consistent. For example, use `loops` instead
of `mloop`. The plural helps to clarify that the variable is an array.
I didn't change positions because there is a type mismatch between
C and C++ code that is ugly to manage. All remaining code can be
converted to C++, then that change will be simpler.
Pull Request #105138
This code seems to be left over from before edges, polys, and loops were
stored in CustomData. They are already copied by the CustomData copy
calls directly above, which already deal with every other layer.
Resolving builtin uniforms and uniform blocks when creating
shader interface. This maps builtin uniforms to uniforms
defined by the shader. Works the same as the OpenGL
builtin uniforms.
Pull Request #105128
When using ShaderCreateInfo with builtin uniform(blocks) there are
cases where the current implementation could not find an existing
block. The reason is that it uses name matching and name matching
requires that the shader inputs are sorted based on the name hash.
This change fixes this by first for the sorting of the shader
inputs before resolving the builtins.
Pull Request #105127
Cycles fallback display shader previously did not use viewport.
This would crash or cause the display not to show when using
GPU backends other than OpenGL, if another display shader
was unavailable.
Now use ShaderCreateInfo for Cycles fallback display.
Authored by Apple: Michael Parkin-White
Ref #96261
Pull Request #104987
This patch will give access to the physical device limits
of the device associated with the context. In vulkan each
device has different limits and the application is
responsible to match these limits as the vulkan driver
just ignores calls that don't match these limits.
Those limits are GPUBackend specific and therefore are not
added to GPU_capabilities.
Pull Request #105125
If the resolution attribute exists, it needs to be set to a non-zero
value for the newly added curves. While it might also make sense
to interpolate the value from neighbor curves, for now it's
simplest to just set it to the default value of 12.
Pull Request #105094
The code below has to handle the case when `sample_length` is greater
or equal to the total length already anyway, so we can just make that
a valid input. Currently, the snake hook brush for curves also makes
use of passing in larger sample lengths which current results in crashes
in debug builds.
When trying to rotate in curves edit mode using proportional editing
and connected only mode, Blender would crash.
This was because the `TransData` structs for disconnected elements
did not have the location field populated, resulting in a null pointer
access.
The fix skips these elements entirely using `TD_SKIP`.
Extend the `GRAPH_OT_paste` operator with an enum to define the value offset.
Options are:
| Option | Effect |
| ------------------- | ----------------------------------------------------------------------------- |
| No Offset | use the same key values as the copied keys |
| Cursor Value | align the leftmost key with the cursor value |
| Current Frame Value | Evaluate the curve under the cursor align the leftmost key with it |
| Right Key | Align the rightmost key with the first key that is to the right of the cursor |
| Left Key | Align the leftmost key with the first key that is to the left of the cursor |
Pull Request #104512
This might've been a merge error, the result of color mixing
was being overwritten by a simple copy of source to destination
inside of layerCopyValue_propcol.
When implementing the operator to select linked vertices in weight paint mode, the new `AtomicDisjointSet` was used.
In order to keep the code consistent, and also prepare it to add things like Extending/Shrinking selection, the select linked faces logic was also updated.
It now also makes use of the `AtomicDisjointSet` by connecting all edges of each poly. In order to find connecting Faces you then have to check if edges of that poly share a connection.
Pull Request #104577
The stoke shader of grease pencil uses a geometry shader stage. Apple
devices don't support shaders with geometry shader stage. In the
OpenGL driver there was a pass-through implemented so it didn't fail.
When using the metal backend this needs to be solved more explicitly.
This change patches the grease pencil shader to support both the
backends supporting a geometry stage and those without.
Fixes#105059
Pull Request #105116
This was actually caused by two problems. The first is that the
code actually deliberately detects if nothing happened and pushed
an undo step, a bugfix for a problem that no longer exists.
The second was that SCULPT_test_location sometimes does a closest
point search instead of ray casting and didn't check the result
against the brush radius.
Complex EEVEE nodegraphs, particularly those combining
multiple principledBSDF shader nodes have a tendancy
to require a large number of simultaneous live registers
due to function call depth. In some instances, this
causes substantial performance drop and corruption if
the stack gets too large.
To mitigate this, splitting calls to closure_eval such
that only a single individual closure is evaluated in each
call reduces the number of live registers required. This
is preferred over using compound closure evaluation
functions which require a large amount of in-flight data.
Note that this is generally not more optimal, if the stack
does not spill, as there is an increased instruction count.
The specific trade-off depends on the exact architecture
in question. Hence, this is limited to AMD GPUs.
Authored by Apple: Michael Parkin-White
Ref #96261
Pull Request #104985
66dda2b902 made an incorrect change to account for the special
case for NURBS. Instead, make the step that turns the lengths into
parameters more explicit, and pass the correct total length for each
curve, even in the cyclic case.
Pull Request #105079
This resulted in disappearing NURBS curves when joining them with other
curve types in some cases. The attribute has to be handles similarly to
the radius and resolution attributes rather than as simple generic data.
The attribute was retrieved when converting to Bezier curves when it
wasn't necessary. Instead copy it like a regular attribute if any of the
result curves are NURBS. Also fix a check for an empty span for the
attribute which was never false.
Invalid node trees (e.g. when nodes are linked in a cycle) can not be
evaluated and the viewer is not available in them. This commit just adds
some null checks to handle this case more gracefully.
This is refering to drag & drop within Blender which is using the
drop-box system.
Previously Escape would cancel the dragging, but still pass on the event
to other event handlers, which could trigger other behavior. For example
cancelling dragging a file in a file browser dialog would also cancel
the file browser operation and close the window. Right-click didn't
cancel anything even though we usually use both Escape and right-click
as a way to cancel the operation.
Now both escape and right-click both cancel the dragging and the event
is not passed on further.
Pull Request: #104838
Do the domain check directly in the field input class to avoid the need
for another function to do it elsewhere. Also move one function to
be closer to a similar one, rename some functions, and avoid the need
for two intermediate span variables.
Erroneous cache warming case where the generated material is
identical to default material and cached shader is re-used,
resulting in case where the parent shader is identical to the
source.
Authored by Apple: Michael Parkin-White
Ref #96261
Originally caused by 6514bb05ea
More cases where the active/default color attributes were not set
correctly:
[1] Using the old Python vertex_colors API (vertex_colors.new)
[2] OBJ importer
[3] Collada importer
[4] Data Transfer layout (both standalone operator and "Generate Data
Layers" from the modifier)
Similar to 101d04f41f.
Brought over from https://archive.blender.org/developer/D16977, see
discussion there why some of the code for data transfer is not for the
genereal attribute API.
Pull Request #105020
