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2021-10-18Cycles: replace integrator state argument macrosBrecht Van Lommel
* Rename struct KernelGlobals to struct KernelGlobalsCPU * Add KernelGlobals, IntegratorState and ConstIntegratorState typedefs that every device can define in its own way. * Remove INTEGRATOR_STATE_ARGS and INTEGRATOR_STATE_PASS macros and replace with these new typedefs. * Add explicit state argument to INTEGRATOR_STATE and similar macros In preparation for decoupling main and shadow paths. Differential Revision: https://developer.blender.org/D12888
2021-10-15Cleanup: refactor OptiX shadow intersection for upcoming changesBrecht Van Lommel
2021-10-12Cleanup: spelling in commentsCampbell Barton
2021-10-07Fix Cycles random walk SSS differences between CPU and GPUBrecht Van Lommel
The Embree logic did not match the GPU.
2021-10-06Cycles: fully decouple triangle and curve primitive storage from BVH2Brecht Van Lommel
Previously the storage here was optimized to avoid indirections in BVH2 traversal. This helps improve performance a bit, but makes performance and memory usage of Embree and OptiX BVHs a bit worse also. It also adds code complexity in other parts of the code. Now decouple triangle and curve primitive storage from BVH2. * Reduced peak memory usage on all devices * Bit better performance for OptiX and Embree * Bit worse performance for CUDA * Simplified code: ** Intersection.prim/object now matches ShaderData.prim/object ** No more offset manipulation for mesh displacement before a BVH is built ** Remove primitive packing code and flags for Embree and OptiX ** Curve segments are now stored in a KernelCurve struct * Also happens to fix a bug in baking with incorrect prim/object Fixes T91968, T91770, T91902 Differential Revision: https://developer.blender.org/D12766
2021-10-06Cleanup: don't detect duplicate intersections in EmbreeBrecht Van Lommel
It's unclear why this code was added in the first place, but it seems unnecessary, it can be restored if we find this breaks something. The Embree docs mention that the same primitive may be hit multiple times, but my understanding is that about e.g. curves where both the frontside and backside may be hit. However those hits would be at different distances. The context for this change is that we want to add an optimization where we can immediately update throughput for transparent shadows instead of recording intersections, and avoid duplicate would require extra work. However there is an Embree example that does something similar without worrying about duplicate hits either.
2021-10-06Cleanup: spelling in commentsCampbell Barton
2021-09-29Fix Cycles use of uninitialized value in volume stack intersection on CPUBrecht Van Lommel
Could cause an actual bug but probability is low in practice.
2021-09-21Cycles: merge of cycles-x branch, a major update to the rendererBrecht Van Lommel
This includes much improved GPU rendering performance, viewport interactivity, new shadow catcher, revamped sampling settings, subsurface scattering anisotropy, new GPU volume sampling, improved PMJ sampling pattern, and more. Some features have also been removed or changed, breaking backwards compatibility. Including the removal of the OpenCL backend, for which alternatives are under development. Release notes and code docs: https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles https://wiki.blender.org/wiki/Source/Render/Cycles Credits: * Sergey Sharybin * Brecht Van Lommel * Patrick Mours (OptiX backend) * Christophe Hery (subsurface scattering anisotropy) * William Leeson (PMJ sampling pattern) * Alaska (various fixes and tweaks) * Thomas Dinges (various fixes) For the full commit history, see the cycles-x branch. This squashes together all the changes since intermediate changes would often fail building or tests. Ref T87839, T87837, T87836 Fixes T90734, T89353, T80267, T80267, T77185, T69800
2021-06-28Cleanup: repeated terms in code comments & error messagesCampbell Barton
2021-06-26Cleanup: full sentences in comments, improve comment formattingCampbell Barton
2021-06-24Cleanup: comment blocks, trailing space in commentsCampbell Barton
2021-05-19Fix T87793: Cycles OptiX crash hiding objects in viewport renderBrecht Van Lommel
2021-03-11Cycles: Change device-only memory to actually only allocate on the devicePatrick Mours
This patch changes the `MEM_DEVICE_ONLY` type to only allocate on the device and fail if that is not possible anymore because out-of-memory (since OptiX acceleration structures may not be allocated in host memory). It also fixes high peak memory usage during OptiX acceleration structure building. Reviewed By: brecht Maniphest Tasks: T85985 Differential Revision: https://developer.blender.org/D10535
2021-03-01Fix Cycles build error without Embree on WindowsBrecht Van Lommel
Don't use ssize_t, it's not available in MSVC.
2021-02-17Cycles: add utility functions for zero float2/float3/float4/transformBrecht Van Lommel
Ref D8237, T78710
2021-02-17Cycles: refactor intrinsic functions implementationBrecht Van Lommel
* Add processor independent fallbacks * Use uint32_t and uint64_t types * Remove unused functions * Better comments and less indentation Ref D8237, T78710
2021-02-15macOS: fix Cycles not detecting 64 bit and failing to build with EmbreeBrecht Van Lommel
Contributed by Apple Ref D9527, T78710
2021-02-05Cleanup: correct spelling in commentsCampbell Barton
2021-01-05Fix T83915: Subdivision Surface modifier causes visual artifacts in Cycles ↵Patrick Mours
rendered viewport - CPU and OptiX Changing the geometry in the current scene caused the primitive offsets for all geometry to change, but the values would not be updated in all bottom-level BVH structures. Rendering artifacts and crashes where the result. This fixes that by ensuring all BVH structures are updated when the primitive offsets change.
2020-12-11Cycles: Add CPU+GPU rendering support with OptiXPatrick Mours
Adds support for building multiple BVH types in order to support using both CPU and OptiX devices for rendering simultaneously. Primitive packing for Embree and OptiX is now standalone, so it only needs to be run once and can be shared between the two. Additionally, BVH building was made a device call, so that each device backend can decide how to perform the building. The multi-device for instance creates a special multi-BVH that holds references to several sub-BVHs, one for each sub-device. Reviewed By: brecht, kevindietrich Differential Revision: https://developer.blender.org/D9718
2020-11-04Cycles API: encapsulate Node socket membersKévin Dietrich
This encapsulates Node socket members behind a set of specific methods; as such it is no longer possible to directly access Node class members from exporters and parts of Cycles. The methods are defined via the NODE_SOCKET_API macros in `graph/ node.h`, and are for getting or setting a specific socket's value, as well as querying or modifying the state of its update flag. The setters will check whether the value has changed and tag the socket as modified appropriately. This will let us know how a Node has changed and what to update, which is the first concrete step toward a more granular scene update system. Since the setters will tag the Node sockets as modified when passed different data, this patch also removes the various modified methods on Nodes in favor of Node::is_modified which checks the sockets' update flags status. Reviewed By: brecht Maniphest Tasks: T79174 Differential Revision: https://developer.blender.org/D8544
2020-11-03Cycles: add support for BVH refit in OptiXKévin Dietrich
This avoids recomputing the BVH for geometries that do not have changes in topology but whose vertices are modified (like a simple character animation), and gives up to 40% speedup for BVH building. This is only available for viewport renders at the moment. Reviewed By: pmoursnv, brecht Differential Revision: https://developer.blender.org/D9353
2020-10-29Cycles: silence unused variable warningDalai Felinto
2020-10-23Fix T81102: Cycles crashes in interactive 3D viewport rendering after EmbreeBrecht Van Lommel
Don't allocate a new buffer for refitting meshes, but update the existing one. It's not clear from the API docs if this is required, but it appears to solve the issue and should be more efficient.
2020-10-19Spelling: It's Versus ItsHarley Acheson
Corrects incorrect usage of contraction for 'it is', when possessive 'its' was required. Differential Revision: https://developer.blender.org/D9250 Reviewed by Campbell Barton
2020-09-04CMake: refresh building and external library handling of Cycles standaloneBrecht Van Lommel
* Support precompiled libraries on Linux * Add license headers * Refactoring to deduplicate code Includes work by Ray Molenkamp and Grische for precompiled libraries. Ref D8769
2020-09-01Cycles: Separate Embree device for each CPU Device.Stefan Werner
Before, Cycles was using a shared Embree device across all instances. This could result in crashes when viewport rendering and material preview were using Cycles simultaneously. Fixes issue T80042 Maniphest Tasks: T80042 Differential Revision: https://developer.blender.org/D8772
2020-08-19Cycles : add a Volume Geometry NodeKévin Dietrich
This splits the volume related data (properties for rendering and attributes) of the Mesh node into a new `Volume` node type. This `Volume` node derives from the `Mesh` class since we generate a mesh for the bounds of the volume, as such we can safely work on `Volumes` as if they were `Meshes`, e.g. for BVH creation. However such code should still check for the geometry type of the object to be `MESH` or `VOLUME` which may be bug prone if this is forgotten. This is part of T79131. Reviewed By: brecht Maniphest Tasks: T79131 Differential Revision: https://developer.blender.org/D8538
2020-08-17Cycles: Fix local intersections in Embree for non-instancd geometry.Stefan Werner
Embree's occlusion filter was checking against the wrong object ID and not exiting correctly in case of a mismatch. Fixes T79723
2020-06-22Cycles: internal refactoring to make thick/ribbon curve separate primitivesBrecht Van Lommel
Also removing the curve system manager which only stored a few curve intersection settings. These are all changes towards making shape and subdivision settings per-object instead of per-scene, but there is more work to do here. Ref T73778 Depends on D8013 Maniphest Tasks: T73778 Differential Revision: https://developer.blender.org/D8014
2020-06-22Cycles: remove SIMD BVH optimizations, to be replaced by EmbreeBrecht Van Lommel
Ref T73778 Depends on D8011 Maniphest Tasks: T73778 Differential Revision: https://developer.blender.org/D8012
2020-06-22Cycles: always perform backface culling for curve, remove optionBrecht Van Lommel
The hair BSDFs are already designed to assume this, and disabling backface culling would break them in some cases. Ref T73778 Depends on D8009 Maniphest Tasks: T73778 Differential Revision: https://developer.blender.org/D8010
2020-06-22Cycles: remove support for rendering hair as triangle and linesBrecht Van Lommel
Triangles were very memory intensive. The only reason they were not removed yet is that they gave more accurate results, but there will be an accurate 3D curve primitive added for this. Line rendering was always poor quality since the ends do not match up. To keep CPU and GPU compatibility we just remove them entirely. They could be brought back if an Embree compatible implementation is added, but it's not clear to me that there is a use case for these that we'd consider important. Ref T73778 Reviewers: #cycles Subscribers:
2020-06-22Cycles: use TBB for task pools and task schedulerBrecht Van Lommel
No significant performance improvement is expected, but it means we have a single thread pool throughout Blender. And it should make adding more parallellization in the future easier. After previous refactoring commits this is basically a drop-in replacement. One difference is that the task pool had a mechanism for scheduling tasks to the front of the queue to minimize memory usage. TBB has a smarter algorithm to balance depth-first and breadth-first scheduling of tasks and we assume that removes the need to manually provide hints to the scheduler. Fixes T77533
2020-06-22Cleanup: use lambdas instead of functors for task pools, remove threadidBrecht Van Lommel
2020-06-22Cycles: make TBB a required library dependency, and use in a few placesBrecht Van Lommel
Now that the rest of Blender also relies on TBB, no point in maintaining custom code for paraller_for and thread local storage.
2020-06-22Cleanup: minor refactoring around DeviceTaskBrecht Van Lommel
2020-06-04Cleanup: remove unused flagBrecht Van Lommel
2020-05-27Cycles: Upgraded Embree to version 3.10.0Stefan Werner
Enabled round linear hair in Embree. Differential Revision: https://developer.blender.org/D7623
2020-04-30Fix long OptiX BVH build times in Cycles with many objectsPatrick Mours
Looping over all primitives for every object is really slow, so this patch avoids that by moving the necessary assignments inline with the primitive merging done for every geometry.
2020-03-19Cleanup: `make format` after SortedIncludes changeDalai Felinto
2020-03-11Cleanup: remove foreach include from header, conflicts with OpenVDBBrecht Van Lommel
2020-03-11Fix Cycles crash in BVH8 build due to out of bounds memory accessGiovanni Remigi
Differential Revision: https://developer.blender.org/D7114
2020-02-24Fix Cycles Embree hair + motion blur failing after recent Catmull-Rom changeBrecht Van Lommel
Ref T73778
2020-02-20Cycles: Switched Embree to use Catmull-Rom curves.Stefan Werner
The latest versions of Embree support Catmull-Rom splines which use less memory than the previously used Hermite splines. The representation is also much closer to Cycles own data structures and can hopefully be unified in the future for more memory savings. Memory savings using Victor benchmark scene: Compared to previous Embree: ~400MB Compared to Cycles' native BVH: ~1GB
2020-02-18Fix Embree failing on objects with a very high number of motion stepsBrecht Van Lommel
Set the limit to 129 to match Embree. This applies to all devices for consistent render results. Ref T73778
2020-02-18Fix Cycles Embree test failures with shadow catcherBrecht Van Lommel
Ref T73778
2020-02-18Cycles: Enabled quaternion motion blur with Embree.Stefan Werner
Bringing Embree's motion blur closer to Cycles' native blur. This requries Embree 3.8.0 or newer. Differential Revision: https://developer.blender.org/D6575
2020-02-10Cleanup: spellingCampbell Barton
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