Commit Graph

15 Commits

Author SHA1 Message Date
Brecht Van Lommel
b9ce231060 Cycles: relicense GNU GPL source code to Apache version 2.0.
More information in this post:
http://code.blender.org/

Thanks to all contributes for giving their permission!
2013-08-18 14:16:15 +00:00
Brecht Van Lommel
dee74c299f Attempt to fix #35041 and #34725: cycles crash with OSL and both a 3D viewport
and preview running at the same time.

It seems there's something in OSL/LLVM that's not thread safe, but I couldn't
figure out what exactly. Now all renders share the same OSL ShadingSystem which
should avoid the problem.
2013-04-22 14:27:12 +00:00
Brecht Van Lommel
c77f46d2dd Fix #34601: cycles OSL crash when using preview render and viewport render at
the same time, due to shared texture cache system.
2013-04-04 23:48:07 +00:00
Brecht Van Lommel
de9dffc61e Cycles: initial subsurface multiple scattering support. It's not working as
well as I would like, but it works, just add a subsurface scattering node and
you can use it like any other BSDF.

It is using fully raytraced sampling compatible with progressive rendering
and other more advanced rendering algorithms we might used in the future, and
it uses no extra memory so it's suitable for complex scenes.

Disadvantage is that it can be quite noisy and slow. Two limitations that will
be solved are that it does not work with bump mapping yet, and that the falloff
function used is a simple cubic function, it's not using the real BSSRDF
falloff function yet.

The node has a color input, along with a scattering radius for each RGB color
channel along with an overall scale factor for the radii.

There is also no GPU support yet, will test if I can get that working later.

Node Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#BSSRDF

Implementation notes:
http://wiki.blender.org/index.php/Dev:2.6/Source/Render/Cycles/Subsurface_Scattering
2013-04-01 20:26:52 +00:00
Brecht Van Lommel
adbd84c320 Fix #34121: OSL + persistent images option was not freeing shader memory properly,
causing memory to increase continuously during animation render.
2013-02-14 16:11:47 +00:00
Brecht Van Lommel
9307565269 Attempted fix for issue with latest CUDA kernel for 32 bit windows/linux/mac,
there seems to be some sort of compiler bug in CUDA toolkit 4.2, uninlining a
few functions seems to avoid it.
2013-02-11 22:41:11 +00:00
Brecht Van Lommel
3759c10e5c Fix #33485: cycles OSL now autodetects the presence of emission and transparent
closures to enable multiple importance sampling and transparent shadows.
2012-12-12 06:51:06 +00:00
Brecht Van Lommel
a9d889cba4 Fix #33405: preview render getting stuck in a particular .blend file, ObjectKey
operator< had wrong brackets, changed it now to be more clear.

Fix #33404: crash GPU rendering with OSL option still enabled. There was a check
to disable OSL in this case, but it shouldn't have modified scene->params because
this is used for comparison in scene->modified().
2012-12-04 07:48:09 +00:00
Brecht Van Lommel
7c0a0bae79 Fix #33375: OSL geom:trianglevertices gave wrong coordinates for static BVH.
Also some simple OSL optimization, passing thread data pointer directly instead
of via thread local storage, and creating ustrings for attribute lookup.
2012-12-01 19:15:05 +00:00
Brecht Van Lommel
ab1b5af08d Fix cycles OSL missing support for texture mapping paramaters found in texture
properties tab.
2012-11-20 17:40:10 +00:00
Brecht Van Lommel
f171d0f29c Fix #33125: cycles OSL crash with multiple render sessions running at the same time. 2012-11-09 03:10:22 +00:00
Brecht Van Lommel
eb87529e23 Cycles OSL: shader script node
Documentation here:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/OSL
http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.65/Cycles

These changes require an OSL build from this repository:
https://github.com/DingTo/OpenShadingLanguage

The lib/ OSL has not been updated yet, so you might want to keep OSL disabled
until that is done.

Still todo:
* Auto update for external .osl files not working currently, press update manually
* Node could indicate better when a refresh is needed
* Attributes like UV or generated coordinates may be missing when requested from
  an OSL shader, need a way to request them to be loaded by cycles
* Expose string, enum and other non-socket parameters
* Scons build support

Thanks to Thomas, Lukas and Dalai for the implementation.
2012-11-03 14:32:35 +00:00
Lukas Toenne
41081b3e8c Generate compatible OSL shader parameter names in cases where the node has and input and output with the same name. In that case the convention is to add suffixes "In" and "Out" respectively.
Example:

Blender node has one input "Color" and one output "Color"

-> OSL parameter names should be "ColorIn" and "ColorOut"
2012-09-15 16:31:07 +00:00
Lukas Toenne
21964e6538 OSL implementation of RGB ramp node.
The sampled color ramp data is passed to OSL as a color array. This has to be done as actual float[3] array though, since the Cycles float3 type actually contains 4 floats, leading to shifting color components in the array.

Additional parameter set functions for arrays have been added to the Cycles OSL interface for this purpose.
2012-09-15 15:41:37 +00:00
Ton Roosendaal
da376e0237 Cycles render engine, initial commit. This is the engine itself, blender modifications and build instructions will follow later.
Cycles uses code from some great open source projects, many thanks them:

* BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs":
http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/
* Open Shading Language for a large part of the shading system:
http://code.google.com/p/openshadinglanguage/
* Blender for procedural textures and a few other nodes.
* Approximate Catmull Clark subdivision from NVidia Mesh tools:
http://code.google.com/p/nvidia-mesh-tools/
* Sobol direction vectors from:
http://web.maths.unsw.edu.au/~fkuo/sobol/
* Film response functions from:
http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php
2011-04-27 11:58:34 +00:00