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Age	Commit message (Collapse)	Author
2020-06-22	Cycles: internal refactoring to make thick/ribbon curve separate primitives	Brecht 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
2020-06-22	Cycles: always perform backface culling for curve, remove option	Brecht 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
2020-06-22	Cycles: remove support for rendering hair as triangle and lines	Brecht 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:
2019-04-24	Cycles: remove hair minimum width support.	Brecht Van Lommel
	This never really worked as it was supposed to. The main goal of this is to turn noise from sampling tiny hairs into multiple layers of transparency that do not need to be sampled stochastically. However the implementation of this worked by randomly discarding hair intersections in BVH traversal, which defeats the purpose. If it ever comes back, it's best implemented outside the kernel as a preprocess that changes hair radius before BVH building. This would also make it work with Embree, where it's not supported now. But it's not so clear anymore that with many AA samples and GPU rendering this feature is as helpful as it once was for CPU raytracers with few AA samples. The benefit of removing this feature is improved hair ray tracing performance, tested on NVIDIA Titan Xp: bmw27: +0.37% classroom: +0.26% fishy_cat: -7.36% koro: -12.98% pabellon: -0.12% Differential Revision: https://developer.blender.org/D4532
2019-04-17	ClangFormat: apply to source, most of intern	Campbell Barton
	Apply clang format as proposed in T53211. For details on usage and instructions for migrating branches without conflicts, see: https://wiki.blender.org/wiki/Tools/ClangFormat
2019-03-18	Fix Cycles curve UVs wrong after recent changes.	Brecht Van Lommel

2018-11-09	Cycles: Cleanup, split array from vector	Sergey Sharybin
	Those are similar but different types, no reason to keep their definitions in a single file.
2018-11-09	Cycles: Cleanup, spacing after preprocessor	Sergey Sharybin
	It is supposed to be two spaces before comment stating which if else/endif statements corresponds to. Was mainly violated in the header guards.
2018-07-06	Cleanup: strip trailing space for cycles	Campbell Barton

2017-03-29	Cycles: Make all #include statements relative to cycles source directory	Sergey Sharybin
	The idea is to make include statements more explicit and obvious where the file is coming from, additionally reducing chance of wrong header being picked up. For example, it was not obvious whether bvh.h was refferring to builder or traversal, whenter node.h is a generic graph node or a shader node and cases like that. Surely this might look obvious for the active developers, but after some time of not touching the code it becomes less obvious where file is coming from. This was briefly mentioned in T50824 and seems @brecht is fine with such explicitness, but need to agree with all active developers before committing this. Please note that this patch is lacking changes related on GPU/OpenCL support. This will be solved if/when we all agree this is a good idea to move forward. Reviewers: brecht, lukasstockner97, maiself, nirved, dingto, juicyfruit, swerner Reviewed By: lukasstockner97, maiself, nirved, dingto Subscribers: brecht Differential Revision: https://developer.blender.org/D2586
2016-05-28	Code refactor: modify mesh storage to use arrays rather than vectors, ↵	Brecht Van Lommel
	separate some arrays. Differential Revision: https://developer.blender.org/D2016
2016-02-12	Cycles: Make Blender importer more forward compatible	Sergey Sharybin
	Basically the idea is to make code robust against extending enum options in the future by falling back to a known safe default setting when RNA is set to something unknown. While this approach solves the issues similar to T47377, but it wouldn't really help when/if any of the RNA values gets ever deprecated and removed. There'll be no simple solution to that apart from defining explicit mapping from RNA value to Cycles one. Another part which isn't so great actually is that we now have to have some enum guards and give some explicit values to the enum items, but we can live with that perhaps. Reviewers: dingto, juicyfruit, lukasstockner97, brecht Reviewed By: brecht Differential Revision: https://developer.blender.org/D1785
2014-12-25	Cleanup: Fix Cycles Apache header.	Thomas Dinges
	This was already mixed a bit, but the dot belongs there.
2014-02-02	Code cleanup / Cycles: Remove encasing_ratio variable, it was already hard ↵	Thomas Dinges
	coded, so define it in the kernel only.
2013-12-26	Cycles / Hair: Further cleanup of UI and internals.	Thomas Dinges
	* UI: Remove deprecated condition (CURVE_RIBBONS) and hide backface property, when it's hardcoded in C (Curve/Line segments && Ribbons). * Remove "use_tangent_normal" and "CURVE_KN_TANGENTGNORMAL" as its unused (follow up for last commit).
2013-12-22	Code cleanup / Cycles: Remove unused interpolation code for hair triangles, ↵	Thomas Dinges
	we only support cardinal curves.
2013-12-14	Code cleanup / Cycles: Remove some unused hair code.	Thomas Dinges

2013-08-20	Code cleanup / Cycles:	Thomas Dinges
	* Remove unused hair presets enum.
2013-08-18	Cycles: relicense GNU GPL source code to Apache version 2.0.	Brecht Van Lommel
	More information in this post: http://code.blender.org/ Thanks to all contributes for giving their permission!
2013-08-18	Updates for the Cycle Hair UI. With the following changes	Stuart Broadfoot
	- Removed the cycles subdivision and interpolation of hairkeys. - Removed the parent settings. - Removed all of the advanced settings and presets. - This simplifies the UI to a few settings for the primitive type and a shape mode.
2013-04-16	Cycles Hair: Strand Minimum Pixel Size	Stuart Broadfoot
	Code is added to restrict the pixel size of strands in cycles. It works best with ribbon primitives and a preset for these is included. It uses distance dependent expansion of the strands and then stochastic strand removal to give a fading. To prevent a slowdown for triangle mesh objects in the BVH an extra visibility flag has been added. It is also only applied for camera rays. The strand width settings are also changed, so that the particle size is not included in the width calculation. Instead there is a separate particle system parameter for width scaling.
2013-02-02	Cycles Hair: Fixed hair shape and inclusion of multiple attributes for ↵	Stuart Broadfoot
	triangle primitives When using triangle primitives this fix enables 'closed tip'. UVs and vertex colours are added when using triangle primitives for hair. Two new preset modes have also been included to allow easy access to curves and triangle planes.
2013-01-23	Cycles Hair: Multiple vertex colours and UV coordinates	Stuart Broadfoot
	Added export of multiple UV coordinates and vertex colour attributes. A debugging option to export the strands without using the cache has also been removed.
2013-01-15	Cycles Hair: Introduction of Cardinal Spline Curve Segments and minor fixes.	Stuart Broadfoot
	The curve segment primitive has been added. This includes an intersection function and changes to the BVH. A few small errors in the line segment intersection routine are also fixed.
2013-01-04	Added vertex color attributes (currently limited to one) and UVs included ↵	Stuart Broadfoot
	for triangle mesh hair. I have also included a small speedup for the intersection test.
2013-01-03	Cycles Hair: refactoring to support generic attributes for hair curves. There	Brecht Van Lommel
	should be no functional changes yet. UV, tangent and intercept are now stored as attributes, with the intention to add more like multiple uv's, vertex colors, generated coordinates and motion vectors later. Things got a bit messy due to having both triangle and curve data in the same mesh data structure, which also gives us two sets of attributes. This will get cleaned up when we split the mesh class.
2012-12-28	New feature	Stuart Broadfoot
	Patch [#33445] - Experimental Cycles Hair Rendering (CPU only) This patch allows hair data to be exported to cycles and introduces a new line segment primitive to render with. The UI appears under the particle tab and there is a new hair info node available. It is only available under the experimental feature set and for cpu rendering.