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This changes drastically the implementation to leverage arbitrary writes
in order to reduce complexity, memory usage and increase speed.
Since we are no longer dependent on the framebuffer requirement, we can
allocate bigger size texture that fits all views and avoid the extra.
Transparency, holdout and emissions are no longer deferred and are now
composited using dual source blending.
The indirect lighting and raytracing is still not functional but will
also gets a large refactor on its own
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# Conflicts:
# source/blender/draw/engines/eevee/eevee_bloom.c
# source/blender/draw/engines/eevee/eevee_cryptomatte.c
# source/blender/draw/engines/eevee/eevee_data.c
# source/blender/draw/engines/eevee/eevee_depth_of_field.c
# source/blender/draw/engines/eevee/eevee_effects.c
# source/blender/draw/engines/eevee/eevee_engine.c
# source/blender/draw/engines/eevee/eevee_lightcache.c
# source/blender/draw/engines/eevee/eevee_lightprobes.c
# source/blender/draw/engines/eevee/eevee_lights.c
# source/blender/draw/engines/eevee/eevee_lookdev.c
# source/blender/draw/engines/eevee/eevee_lut_gen.c
# source/blender/draw/engines/eevee/eevee_materials.c
# source/blender/draw/engines/eevee/eevee_mist.c
# source/blender/draw/engines/eevee/eevee_motion_blur.c
# source/blender/draw/engines/eevee/eevee_occlusion.c
# source/blender/draw/engines/eevee/eevee_private.h
# source/blender/draw/engines/eevee/eevee_render.c
# source/blender/draw/engines/eevee/eevee_renderpasses.c
# source/blender/draw/engines/eevee/eevee_sampling.c
# source/blender/draw/engines/eevee/eevee_screen_raytrace.c
# source/blender/draw/engines/eevee/eevee_shaders.c
# source/blender/draw/engines/eevee/eevee_shadows.c
# source/blender/draw/engines/eevee/eevee_shadows_cascade.c
# source/blender/draw/engines/eevee/eevee_shadows_cube.c
# source/blender/draw/engines/eevee/eevee_subsurface.c
# source/blender/draw/engines/eevee/eevee_temporal_sampling.c
# source/blender/draw/engines/eevee/eevee_volumes.c
# source/blender/gpu/intern/gpu_codegen.c
# source/blender/gpu/intern/gpu_material_library.c
# source/blender/gpu/opengl/gl_compute.cc
# source/blender/makesrna/intern/rna_material.c
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This follows the type defined in `gpu_shader_shared_utils.h`.
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This removes the light count limit for the forward shaded object. This
also provides a more efficient way of computing the culling directly on
the GPU. Moreover, this avoids doing multiple lighting passes for high
light counts in the deferred pipeline, improving performance.
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The new pipeline is now cleaner and allows for deferred refraction.
The refractions are more accurate but are not denoised for now. More
research needs to be done in this area.
There is no feedback buffer for now, so reflections of metallic surfaces
will appear black.
The same restriction on refractive materials still holds true. They will
not appear in screen space tracing of other non refractive surfaces.
However, refractive surfaces (non-blended) can now reflect themselves
and the other surfaces with screen space reflections.
Half res tracing is not implemented back yet.
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Pretty much identical.
Texture format is now always `GPU_R32F` to remove some workarounds.
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This new implementation follows the technique described in
"Efficient screen space subsurface scattering Siggraph 2018".
Compared to the old implementation it fixes a lot of issues at
the cost of it being slower. This fixes:
- Light leaking between different objects.
- Light leaking between different surfaces with different depths.
- SSS radii are now "texturable" per pixel. No SSS surfaces limits.
- Noise should be lower.
- Precomputation is only done once for all SSS surfaces which lowers the
per material storage and precomputation time.
Implementation is also simpler as it is only a one pass processing.
We differ from the reference presentation by not precomputing the
RGB weights per samples. We actually compute them on the fly in order
to support varying SSS radii.
Notes:
- SSS IOR and SSS anisotropy are not supported.
- Object level light leak prevention might not work for high number of
objects in the scene (> 1024). In this case light leak might occur.
Adding or deleting (hidding) objects in the scene might change which
objects can leak.
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Same implementation as before but it is less intrusive towards the
shading Node glsl code.
Hair shaders also now supports displacement.
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This does not include reference spheres rendering.
The approach is a bit different than before.
Now we use a `bNodeTree` to control the rendering of lookdev. This
generates a `GPUMaterial` that is stored per `Instance`. This way
rendering lookdev is just updating the temp light cache using this
material as world material. Removing the use of custom shader.
This introduces a small hack in order to bind the studiolight hdri after
the nodetree glsl parsing.
The background display however is still using a custom shader in order
to sample the world cubemap with different roughness.
The view space option of the studiolight is now faster by using a
transform before shading instead of rebaking the lightprobe constantly.
This should not have any particular impact on render time.
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Some things differs from old implementation.
- Object visibility is filtered correctly without using a visibility
callback (which is to be removed).
The implementation is also more high level using less low level tricks.
A dedicated LightProbeView is created for each lightprobe cubeface to
render using all pipeline (deferred and forward).
There is still a few things not working.
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Starting to port lightcache.c to c++.
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Only for background for now.
Support is now not using defines and just use the correct globals and
uniforms to keep the same values as before.
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Shading groups are now created by the material_array_get functions
instead of passing a reference to be filled later. This avoids having
to wait later to maybe create a sub shading group.
This also simplifies different geomety type handling.
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This adds support for rendering gpencil objects.
There is a lot of features to implement specially the ones requiring
per object uniforms.
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This is a port of the old material grouping. This is a bit more
clean as we use containers for each passes and other structures.
Nodetree is generated without major error for simple materials but
it is not yet used as closures are not outputed.
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Difference with previous implementation:
- Better texture space usage of cone and area light shadow.
- Shadows are packed in an atlas. Reducing requirements for future
features.
- Sampling is simpler because shadow matrix does everything.
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This avoids having to reset accumulation if nothing affecting
eevee changes.
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This also wrap GPUFrameBuffer & GPUTexture inside eevee:Framebuffer
and eevee:Texture to improve managment.
Another cleanup was to put all members of `Instance` public to
avoid much complexity in accessing the data with modules
dependencies.
Also split velocity View related data to `class Velocity` and
rename previous `Velocity` to `VelocityModule`
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Support infinite light count by dividing rendering into chucks of
LIGHT_MAX. Forward passes are just rendered again and deferred passes
(not implemented yet) will just have to have multiple light evaluation
passes.
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Only supports simple point lights for now
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This is almost the same thing as old implementation.
Differences:
- We clamp the motion vectors to their maximum when sampling the velocity buffer.
- Velocity rendering (and data manager) is separated from motion blur. This allows
outputing the motion vector render pass and in the future use motion vectors to
reproject older frames.
- Vector render pass support (only if motion blur is disabled, just like cycles).
- Velocity tiles are computed in one pass (simpler code, less CPU overhead, less
VRAM usage, maybe a bit slower but imperceivable (< 0.3ms)).
- Two velocity passes are outputed, one for motion blur fx (applied per shading view)
and one for the vector pass. This could be optimized further in the future.
- No current support for deformation & hair (to come).
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Bonus addition, support for shutter curve.
Compared to the old implementation, the per time step sync function
is lighter and localized. Also it does not require a full engine
"reboot" in order to work.
Also modifies camera setup to be compatible with future camera motion
blur.
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Bonus addition, support for shutter curve.
Compared to the old implementation, the per time step sync function
is lighter and localized. Also it does not require a full engine
"reboot" in order to work.
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Pretty much identical to the previous implementation. With the exception
of a temporary noise function and some simplification of the CoC
computation. This also fixes issues with the Ortho depth of field.
Most of the files were modified to comply to new shader codestyle.
This also adds partial support of panoramic cameras (bokeh and
anamorphic is still buggy).
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This move view resolution handling to the `Camera` class that will
in the future clip and trim each view in panoramic projection.
There is a new `CameraView` that contains the `DRWView` and subview.
This way each `ShadingView` is associated to a unique `CameraView`.
ShadingView` & `CameraView` are all allocated & defined at creation time
but only the one activated by `Camera` will be rendered.
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This option will make accumulation happen in a pre exposed logarithm
color space. This reduces the importance of bright pixels in the pixel
filter which will result in less aliasing in theses areas.
There is a few cases where one might want to disable this option to
match cycles better.
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Render mode is really close to what the viewport render does.
Film output is done by resolving the data to the next (double buffered)
framebuffer and read back.
This also includes a bit of cleaning about naming of init() and sync()
functions.
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- Add eevee_ prefix to shaders to avoid name clashing.
- remove plural of eevee_shaders.
- rename eevee_shared.hh to eevee_shader_shared.hh.
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This commit adds the Film class that handles accumulation of color and
non-color data using arbitrary projection and filter size.
A weighted accumulation (sum) is done into a data buffer with an
additional weight buffer. The sum being per pixel, it allows the input
textures that are not aligned with the output pixel grid.
Panoramic projection works by rendering a cubemap (6 views) of the scene
at the camera position. The Film filter pass then gather the pixels
using the correct Panoramic projection ensuring correct Anti-Aliasing.
For Non-color data (depth, normals) we only keep the closest value to
the target pixel center (simulating a filter size of 0).
Color data is accumulated in a log space to improve AntiAliasing output.
This is hardcoded for now.
Larger filters have poor performance but are very fast to converge.
Code Wise: This commit rename some modules to avoid possible confusion
and have better meaning. Use namespace instead of prefixes.
Added a new eevee_shared.hh file to share structure and enum definitions
between GLSL and C++.
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TODO describe overall implementation here
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