This adds correct object bounds estimation.
This works by creating an occupancy texture where one
bit represents one froxel. A geometry pre-pass fill this
occupancy texture and doesn't do any shading. Each bit
set to 0 will not be considered occupied by the object
volume and will discard the material compute shader for
this froxel.
There is 2 method of computing the occupancy map:
- Atomic XOR: For each fragment we compute the amount of
froxels **center** in-front of it. We then convert that
into occupancy bitmask that we apply to the occupancy
texture using `imageAtomicXor`. This is straight forward
and works well for any manifold geometry.
- Hit List: For each fragment we write the fragment depth
in a list (contained in one array texture). This list
is then processed by a fullscreen pass (see
`eevee_occupancy_convert_frag.glsl`) that sorts and
converts all the hits to the occupancy bits. This
emulate Cycles behavior by considering only back-face
hits as exit events and front-face hits as entry events.
The result stores it to the occupancy texture using
bit-wise `OR` operation to compose it with other non-hit
list objects. This also decouple the hit-list evaluation
complexity from the material evaluation shader.
## Limitations
### Fast
- Non-manifolds geometry objects are rendered incorrectly.
- Non-manifolds geometry objects will affect other objects
in front of them.
### Accurate
- Limited to 16 hits per layer for now.
- Non-manifolds geometry objects will affect other objects
in front of them.
Pull Request: https://projects.blender.org/blender/blender/pulls/113731
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.
After some recent changes BLI_math_base got (indirectly) included
from DNA file, causing defines conflict in Cycles: Cycles wants the
default fast behavior of square root, and BLI color wants it to be
more preciese.
Proposed solution is to move the SSE block away from the math_base
closer to code which uses it. The initial intent was to make those
functions reusable, but for a long long time the color utilities
are the only users of those functions.
This change does not prevent the error from re-occurring in the
future if some code includes sse2neon and BLI color utilities, but
it makes such conflict situation much less likely to happen, for
now.
The downside of this change is that the code now need to include
BLI_simd.h explicitly to access BLI_HAVE_SSE2 instead of relying
on it being included indirectly with math headers. The mitigation
for this is to change semantic of the BLI_HAVE_SSE2: now it is
defined to 1 if SSE2 is supported and to 0 otherwise. This makes
it so the code needs to check if using `#if BLI_HAVE_SSE2` and
if the BLI_simd.h is not included it will generate warning when
using GCC or Clang.
This change in semantic is is something the current patches would
need to ensure is handled correctly.
Pull Request: https://projects.blender.org/blender/blender/pulls/109664
Is not visible on any of the officially platforms, as everywhere
SSE2 is available (on Apple Silicon via sse2neon).
Only got noticed by some intermittent issue during development
which made BLI_HAVE_SSE2 unaccessible.
Seems that transpose was done a bit wrong. Not sure if worth trying
to fold the equation into C++ types, as that requires extra memory
transfers for transpose. Opted for a more naive folding, which
avoids extra copies.
Added a regression test for it, verified against numpy, the BLI
SSE2 implementation.
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.
This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.
Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.
Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:
https://reuse.software/faq/
The reasoning is that the detail namespace is not to be used
outside the module itself. But one might want to use different
number types with these templates.
The `Base` suffix was chosen in order to be consistent with `MatBase`
and `Vector` naming convention.
This patch re-implement the whole C rotation API into a more type
oriented C++ API. See the #104444 design task for more details about
the goals.
The list of C to C++ equivalent syntax can be found attached.
This adds `AngleRadian`, `AngleCartesian` and `AngleFraction` as
different angle types with the same interface. Each of them have
specific benefits / cons. See inline documentation for detail.
This adds `Axis` and `AxisSigned` class wrapped enums to increase type
safety with axes selection.
This adds `CartesianBasis` to represent orthonormal orientations.
Added a weight accumulation to dual-quaternions to make normalization
error proof. Creates the overhead of summing the total weight twice
(which I think is negligible) and add an extra float.
Named the dual-quaternion `DualQuaternion` to avoid naming ambiguity
with `DualQuat` which come up quite often (even with namespace).
Pull Request: https://projects.blender.org/blender/blender/pulls/104941
Straightforward port. I took the oportunity to remove some C vector
functions (ex: copy_v2_v2).
This makes some changes to DRWView to accomodate the alignement
requirements of the float4x4 type.
Straightforward port. I took the oportunity to remove some C vector
functions (ex: `copy_v2_v2`).
This makes some changes to DRWView to accomodate the alignement
requirements of the float4x4 type.
This patch implements the matrix types (i.e:float4x4) by making heavy
usage of templating. All matrix functions are now outside of the vector
classes (inside the blender::math namespace) and are not vector size
dependent for the most part.
###Motivations
The goal/motivations of this rewrite are the same as the Vector C++ API (D13791):
- Template everything for making it work with any types and avoid code duplication.
- Use functional style instead of Object Oriented function call to allow a simple compatibility layer with GLSL syntax (see T103026 for more details).
- Allow most convenient constructor syntax and accessors (array subscript `matrix[c][r]`, or component alias `matrix.y.z`).
- Make it cover all features the current C API supports for adoption.
- Keep compilation time and debug performance somehow acceptable.
###Consideration:
- The new `MatView` class can be generated by `my_float.view<NumCol, NumRow, StartCol, StartRow>()` (with the last 2 being optionnal). This one allows modifying parts of the source matrix in place. It isn't pretty and duplicates a lot of code, but it is needed mainly to replace `normalize_m4`. At least I think it is a good starting point that can refined further.
- An exhaustive list of missing `BLI_math_matrix.h` functions from the new API can be found here P3373.
- This adds new Rotation types in order to have a clean API. This will be extended when we port the full Rotation API. The types are made so that they don't allow implicit down-casting to their vector representation.
- Some functions make direct use of the Eigen library, bypassing the Eigen C API defined in `intern/eigen`. Its use is contained inside `math_matrix.cc`. There is conflicting opinion wether we should use it more so I contained its usage to almost the tasks as in the C API for now.
Reviewed By: sergey, JacquesLucke, HooglyBoogly, Severin, brecht
Differential Revision: https://developer.blender.org/D16625
