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7 Commits

Author SHA1 Message Date
Brecht Van Lommel
cfd0b3c5f2 Fix OSL distance() of point to line segment function not being available, 
implemented now in stdosl.h.
 2012-12-28 18:21:07 +00:00
Brecht Van Lommel
80d22a3f12 Cycles OSL: handle new getattribute constant folding with renderstate NULL check, 
and fix #33654, distance to line segment function is not implemented but compiled
anyway, now it should give a compile error.
 2012-12-22 15:15:11 +00:00
Brecht Van Lommel
54729df020 Cycles OSL: diffuse_toon and specular_toon closures. These are toon shaders with 
a size parameter between 0.0 and 1.0 that gives a angle of reflection between
0° and 90°, and a smooth parameter that gives and angle over which a smooth
transition from full to no reflection happens.

These work with global illumination and do importance sampling of the area within
the angle. Note that unlike most other BSDF's these are not energy conserving in
general, in particular if their weight is 1.0 and size > 2/3 (or 60°) they will
add more energy in each bounce.

Diffuse: http://www.pasteall.org/pic/show.php?id=42119
Specular: http://www.pasteall.org/pic/show.php?id=42120
 2012-12-19 21:17:16 +00:00
Brecht Van Lommel
8d4bd2cf3b Cycles OSL: add diffuse_ramp closure in addition to phong_ramp. 2012-12-11 14:39:41 +00:00
Brecht Van Lommel
209cd25745 Cycles OSL: phong_ramp(N, exponent, colors[8]) closure added, which works like 
a specular ramp shader. Note this is OSL only still, for experimenting.

Patch by Thomas.
 2012-11-06 19:59:07 +00:00
Brecht Van Lommel
27d647dcf8 Cycles: 4 new nodes. 
* Tangent: generate a tangent direction for anisotropic shading. Can be either
  radial around X/Y/Z axis, or from a UV map. The default tangent for the
  anisotropic BSDF and geometry node is now always radial Z, for UV tangent use
  this node now.

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Tangent

* Normal Map: generate a perturbed normal from an RGB normal map image. This
  is usually chained with an Image Texture node in the color input, to specify
  the normal map image. For tangent space normal maps, the UV coordinates for
  the image must match, and the image texture should be set to Non-Color mode
  to give correct results.

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Normal_Map

* Refraction BSDF: for best results this node should be considered as a building
  block and not be used on its own, but rather mixed with a glossy node using a
  fresnel type factor. Otherwise it will give quite dark results at the edges for
  glossy refraction.

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

* Ambient Occlusion: controls the amount of AO a surface receives, rather than
  having just a global factor in the world. Note that this outputs a shader and
  not a color, that's for another time.

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Ambient_Occlusion
 2012-11-06 19:59:02 +00:00
Brecht Van Lommel
615fe0295f Cycles OSL: refactoring and fixes 
* Moved kernel/osl/nodes to kernel/shaders
* Renamed standard attributes to use geom:, particle:, object: prefixes
* Update stdosl.h to properly reflect the closures we support
* Fix the wrong stdosl.h being used for building shaders
* Add geom:numpolyvertices, geom:trianglevertices, geom:polyvertices attributes
 2012-11-03 14:32:13 +00:00