Implement the next phases of bounds improvement design #96968.
Mainly the following changes:
Don't use `Object.runtime.bb` for performance caching volume bounds.
This is redundant with the cache in most geometry data-block types.
Instead, this becomes `Object.runtime.bounds_eval`, and is only used
where it's actually needed: syncing the bounds from the evaluated
geometry in the active depsgraph to the original object.
Remove all redundant functions to access geometry bounds with an
Object argument. These make the whole design confusing, since they
access geometry bounds at an object level.
Use `std::optional<Bounds<float3>>` to pass and store bounds instead
of an allocated `BoundBox` struct. This uses less space, avoids
small heap allocations, and generally simplifies code, since we
usually only want the min and max anyway.
After this, to avoid performance regressions, we should also cache
bounds in volumes, and maybe the legacy curve and GP data types
(though it might not be worth the effort for those legacy types).
Pull Request: https://projects.blender.org/blender/blender/pulls/114933
This patch adds support for full precision compositing for the Realtime
Compositor. A new precision option was added to the compositor to change
between half and full precision compositing, where the Auto option uses
half for the viewport compositor and the interactive render compositor,
while full is used for final renders.
The compositor context now need to implement the get_precision() method
to indicate its preferred precision. Intermediate results will be stored
using the context's precision, with a number of exceptions that can use
a different precision regardless of the context's precision. For
instance, summed area tables are always stored in full float results
even if the context specified half float. Conversely, jump flooding
tables are always stored in half integer results even if the context
specified full. The former requires full float while the latter has no
use for it.
Since shaders are created for a specific precision, we need two variants
of each compositor shader to account for the context's possible
precision. However, to avoid doubling the shader info count and reduce
boilerplate code and development time, an automated mechanism was
employed. A single shader info of whatever precision needs to be added,
then, at runtime, the shader info can be adjusted to change the
precision of the outputs. That shader variant is then cached in the
static cache manager for future processing-free shader retrieval.
Therefore, the shader manager was removed in favor of a cached shader
container in the static cache manager.
A number of utilities were added to make the creation of results as well as
the retrieval of shader with the target precision easier. Further, a
number of precision-specific shaders were removed in favor of more
generic ones that utilizes the aforementioned shader retrieval
mechanism.
Pull Request: https://projects.blender.org/blender/blender/pulls/113476
Design task: #93551
This PR replaces the auto smooth option with a geometry nodes modifier
that sets the sharp edge attribute. This solves a fair number of long-
standing problems related to auto smooth, simplifies the process of
normal computation, and allows Blender to automatically choose between
face, vertex, and face corner normals based on the sharp edge and face
attributes.
Versioning adds a geometry node group to objects with meshes that had
auto-smooth enabled. The modifier can be applied, which also improves
performance.
Auto smooth is now unnecessary to get a combination of sharp and smooth
edges. In general workflows are changed a bit. Separate procedural and
destructive workflows are available. Custom normals can be used
immediately without turning on the removed auto smooth option.
**Procedural**
The node group asset "Smooth by Angle" is the main way to set sharp
normals based on the edge angle. It can be accessed directly in the add
modifier menu. Of course the modifier can be reordered, muted, or
applied like any other, or changed internally like any geometry nodes
modifier.
**Destructive**
Often the sharp edges don't need to be dynamic. This can give better
performance since edge angles don't need to be recalculated. In edit
mode the two operators "Select Sharp Edges" and "Mark Sharp" can be
used. In other modes, the "Shade Smooth by Angle" controls the edge
sharpness directly.
### Breaking API Changes
- `use_auto_smooth` is removed. Face corner normals are now used
automatically if there are mixed smooth vs. not smooth tags. Meshes
now always use custom normals if they exist.
- In Cycles, the lack of the separate auto smooth state makes normals look
triangulated when all faces are shaded smooth.
- `auto_smooth_angle` is removed. Replaced by a modifier (or operator)
controlling the sharp edge attribute. This means the mesh itself
(without an object) doesn't know anything about automatically smoothing
by angle anymore.
- `create_normals_split`, `calc_normals_split`, and `free_normals_split`
are removed, and are replaced by the simpler `Mesh.corner_normals`
collection property. Since it gives access to the normals cache, it
is automatically updated when relevant data changes.
Addons are updated here: https://projects.blender.org/blender/blender-addons/pulls/104609
### Tests
- `geo_node_curves_test_deform_curves_on_surface` has slightly different
results because face corner normals are used instead of interpolated
vertex normals.
- `bf_wavefront_obj_tests` has different export results for one file
which mixed sharp and smooth faces without turning on auto smooth.
- `cycles_mesh_cpu` has one object which is completely flat shaded.
Previously every edge was split before rendering, now it looks triangulated.
Pull Request: https://projects.blender.org/blender/blender/pulls/108014
Currently object bounds (`object.runtime.bb`) are lazily initialized
when accessed. This access happens from arbitrary threads, and
is unprotected by a mutex. This can cause access to stale data at
best, and crashes at worst. Eager calculation is meant to keep this
working, but it's fragile.
Since e8f4010611, geometry bounds are cached in the geometry
itself, which makes this object-level cache redundant. So, it's clearer
to build the `BoundBox` from those cached bounds and return it by
value, without interacting with the object's cached bounding box.
The code change is is mostly a move from `const BoundBox *` to
`std::optional<BoundBox>`. This is only one step of a larger change
described in #96968. Followup steps would include switching to
a simpler and smaller `Bounds` type, removing redundant object-
level access, and eventually removing `object.runtime.bb`.
Access of bounds from the object for mesh, curves, and point cloud
objects should now be thread-safe. Other object types still lazily
initialize the object `BoundBox` cache since they don't have
a data-level cache.
Pull Request: https://projects.blender.org/blender/blender/pulls/113465
The experimental GPU compositor is leaking memory in any setup.
This is because the current implementation of the render texture pool
always created a new texture and only freed the textures upon deletion.
This was a temporary implementation until a proper implementation that
uses the DRW textures pool was used.
This patch implements a small texture pool as a temporary fix until the
aforementioned DRW texture pool implementation is done.
The GPU compositor crops the viewed images to the render resolution.
While the original size and content of the input to the viewer should be
retained as is.
This patch fixes that by specializing compositors that can use composite
outputs to be able to view images of any arbitrary size. This is still
missing the translation offset of the viewer, but this shall be tackled
separately.
The experimental GPU compositor always returned the first view in
multi-view rendering. This patch fixes that by also checking for the
view name of the context when searching for the appropriate pass.
Don't assume existence of GPU backend in (background) preview rendering.
Also add null pointer checks and rely on assert instead to detect
invalid usage of GPU_render_begin/end, so that potential future mistakes
don't cause crashes.
Pull Request: https://projects.blender.org/blender/blender/pulls/112971
This simplifies running built-in IO tests with:
ctest -R bf_io_
Also use "bf_io_" prefix for the libraries since it was already used
by some and it's a useful hint the libraries are used for IO.
A mistake in some of the previous refactor which was aimed to make the
byte buffer to be stored as uint8_t. One of the array size calculation
was missing multiplication by 4 channels.
Pull Request: https://projects.blender.org/blender/blender/pulls/112508
Listing the "Blender Foundation" as copyright holder implied the Blender
Foundation holds copyright to files which may include work from many
developers.
While keeping copyright on headers makes sense for isolated libraries,
Blender's own code may be refactored or moved between files in a way
that makes the per file copyright holders less meaningful.
Copyright references to the "Blender Foundation" have been replaced with
"Blender Authors", with the exception of `./extern/` since these this
contains libraries which are more isolated, any changed to license
headers there can be handled on a case-by-case basis.
Some directories in `./intern/` have also been excluded:
- `./intern/cycles/` it's own `AUTHORS` file is planned.
- `./intern/opensubdiv/`.
An "AUTHORS" file has been added, using the chromium projects authors
file as a template.
Design task: #110784
Ref !110783.
