test/intern/cycles/kernel/osl/shaders/node_diffuse_bsdf.osl

/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */

#include "stdcycles.h"

shader node_diffuse_bsdf(color Color = 0.8,
                         float Roughness = 0.0,
                         normal Normal = N,
                         output closure color BSDF = 0)
{
  if (Roughness == 0.0)
    BSDF = Color * diffuse(Normal);
  else
    BSDF = Color * oren_nayar_diffuse_bsdf(Normal, clamp(Color, 0.0, 1.0), Roughness);
}
License headers: use SPDX-FileCopyrightText for .inl and .osl files 2023-08-04 13:24:17 +10:00			`/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation`
			`*`
			`* SPDX-License-Identifier: Apache-2.0 */`
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
Cleanup: Fix build warnings from OSL shader compilation There were to copies of stdosl.h one from stock OSL and one in the cycles tree augmented with cycles specific closures. moved the cycles ones to stdcycles.h and copied the stock stdosl.h and accompanying headers from the OSL shader folder. for further details see D6812. Reviewed By: brecht Differential Revision: https://developer.blender.org/D6812 2020-02-11 21:40:23 -07:00			`#include "stdcycles.h"`
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
			`shader node_diffuse_bsdf(color Color = 0.8,`
Cycles: Oren-Nayar BSDF support. This is not a separate shader node, rather it is available through the Roughness input on the Diffuse BSDF. http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Diffuse Patch by Yasuhiro Fujii, thanks! 2011-11-14 17:31:47 +00:00			`float Roughness = 0.0,`
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			`normal Normal = N,`
OSL Shader Files: * Simplify default color values, where each component was the same. * Initialize closures as Null Closure, rather than assigning an existing closure, gets overwritten anyways. 2012-12-11 16:06:03 +00:00			`output closure color BSDF = 0)`
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			`{`
style cleanup: make OSL follow our C style convention. http://wiki.blender.org/index.php/Dev:Doc/CodeStyle 2012-10-17 01:47:37 +00:00			`if (Roughness == 0.0)`
Cycles: Oren-Nayar BSDF support. This is not a separate shader node, rather it is available through the Roughness input on the Diffuse BSDF. http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Diffuse Patch by Yasuhiro Fujii, thanks! 2011-11-14 17:31:47 +00:00			`BSDF = Color * diffuse(Normal);`
			`else`
Fix: Cycles rough diffuse rendering with bright input color in OSL The Oren Nayer diffuse BSDF had a energy compensation term added in a recent commit[1]. This energy compensation term used the colour input in it's computation. The colour input was clamped in SVM, but not OSL, resulting in differences between the two backends. This commit resolves this issue by clamping the colour in the OSL script to match SVM. [1] 5e40b9bb5cefdaca2d88bb6316e180b2bdf929db Pull Request: https://projects.blender.org/blender/blender/pulls/123527 2024-06-21 18:54:15 +02:00			`BSDF = Color * oren_nayar_diffuse_bsdf(Normal, clamp(Color, 0.0, 1.0), Roughness);`
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			`}`