Commit Graph

21 Commits

Author SHA1 Message Date
Brecht Van Lommel
57cf48e7c6 Cycles Hair: refactoring to support generic attributes for hair curves. There
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.
2013-01-03 12:08:54 +00:00
Stuart Broadfoot
e9ba345c46 New feature
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.
2012-12-28 14:21:30 +00:00
Brecht Van Lommel
abd3c87663 Cycles: reduce memory usage of instanced objects by about 40%, as long as the
motion vector pass is not enabled.
2012-12-20 19:26:57 +00:00
Brecht Van Lommel
0d6976ad0c Fix #32900: object motion blur not working on the GPU. To make this work I disabled motion
blurring of scale animation, probably not a big loss in practice since it's not so common
to animate this, can be added back later.
2012-11-29 00:43:50 +00:00
Brecht Van Lommel
2ba840652d Cycles: improve Anisotropic BSDF node, changing the Roughness U/V inputs to
Roughness, Anisotropy and Rotation. Also a fix for automatic tangents and
OSL attribute handling.

Meaning of new sockets explained in the documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Anisotropic
2012-11-04 22:31:32 +00:00
Brecht Van Lommel
6915394a3b Attempts to fix CUDA issues on sm 2.0 cards, still no luck getting motion blur
working, but this should make it not crash.

Also fix for wrong shutter time, should have been shorter.
2012-10-17 22:48:29 +00:00
Brecht Van Lommel
d08b06f773 Cycles: motion blur is now curved and passes exactly through the midpoint.
Previously it would only interpolate between the previous and next frame,
which meant it might not hit the current frame position.
2012-10-17 12:55:23 +00:00
Brecht Van Lommel
7680f88f18 Fix object motion blur crash with lamp sampling(?), missed a check.
Motion blur documentation is here:
http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.65/Cycles#Motion_Blur
2012-10-16 13:20:57 +00:00
Brecht Van Lommel
fe16b26206 Cycles: fix some update issues with camera motion blur, and do some more work
for getting object motion blur ready.
2012-10-15 21:12:58 +00:00
Brecht Van Lommel
94f869a256 Cycles: camera motion blur enabled.
Still more work needed to get object motion blur ready.
2012-10-09 18:37:14 +00:00
Brecht Van Lommel
fedc8e1722 Cycles: add "From Dupli" option for texture coordinate node. This gets the
Generated and UV coordinates from the duplicator of instance instead of the
object itself.

This was used in e.g. Big Buck Bunny for texturing instanced feathers with
a UV map on the bird. Many files changed, mainly to do some refactoring to
get rid of G.rendering global in duplilist code.
2012-10-04 21:40:39 +00:00
Lukas Toenne
9e3fa15d4b Added a bunch of additional particle state attributes to the Cycles particle info node:
* Location: Basically the same as the location from Object Info node for object instances on particles, but in principle there could be additional offsets for dupli objects, so included for completeness.
* Size: Single float scale of the particle. Also directly translates to object scale for current dupli objects, but handy to have as a single float to start with instead of a scale vector (currently not even exposed in Object Info).
* Rotation: This is a quaternion, which are not yet supported by Cycles nodes. The float4 is copied to internal Cycles data and stored in the particles texture data, but the node doesn't have a socket for it yet and the data is not yet written to the stack. Code is just commented out so could be enabled quickly if/when rotation support is added to cycles.
* Velocity: Linear velocity vector of particles.
* Angular Velocity: Angular velocity around principle axes.

The texture data is currently packed tightly into the particles texture, which saves a few bytes, but requires an additional texture lookup for some vector attributes which spread over two float4s. Could also add another float4 to particle size to avoid this.
2012-08-31 19:38:59 +00:00
Lukas Toenne
fec872ef9c Added a particle index output to the Particle Info Cycles node. This is required to get consistent ID numbers for particles. The Object ID is not usable since it's a user defined value of the instanced object, which does not vary per instance. Also the random value from the object info node is not consistent over time, since it only depends on the index in the dupli list (so each emitted or dying particle shifts the value).
The particle index is always the same for a specific particle. Randomized values can be generated from this with the use of a noise texture.
2012-07-26 11:40:58 +00:00
Lukas Toenne
5e1bbde01d Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed.
The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode).

Some simple use cases on the code.blender.org blog:
http://code.blender.org/index.php/2012/05/particle-info-node/
2012-06-08 16:17:57 +00:00
Brecht Van Lommel
c3e1fce775 Cycles: add Object Info node, with outputs object location, object/material
pass index, and a random number unique to the instance of the object.

This can be useful to give some variation to a single material assigned to
multiple instances, either manually controlled through the object index, based
on the object location, or randomized for each instance. 

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Object_Info
2012-05-21 12:52:28 +00:00
Brecht Van Lommel
c8cbe63947 Cycles: fix issues with texture coordinates and object scale. Auto texture
space size and location were outdated often, and already computed on demand
by blender internal, now do that through RNA as well.
2012-05-08 23:39:31 +00:00
Brecht Van Lommel
1e2afcddd3 Fix #31168: cycles mask layer should only affect objects for camera rays.
Fix: texture coordinate normal output was not correct, still changed under
object transform.
2012-05-02 09:33:45 +00:00
Brecht Van Lommel
1d8c798188 Cycles: support for motion vector and UV passes.
Most of the changes are related to adding support for motion data throughout
the code. There's some code for actual camera/object motion blur raytracing
but it's unfinished (it badly slows down the raytracing kernel even when the
option is turned off), so that code it disabled still.

Motion vector export from Blender tries to avoid computing derived meshes
when the mesh does not have a deforming modifier, and it also won't store
motion vectors for every vertex if only the object or camera is moving.
2012-04-30 12:49:26 +00:00
Brecht Van Lommel
93df58160e Fix #30966: cycles nan mesh vertices got set to (0, 0, 0), now remove them instead. 2012-04-16 08:35:21 +00:00
Brecht Van Lommel
f99343d3b8 Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
  Diffuse/Glossy/Transmission x Direct/Indirect/Color

Not supported yet:
* UV, Vector, Mist

Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.

Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +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