d2db9927ed
Use sub-pixel differentials for bump mapping helps with reducing artifacts when objects are moving or when textures have high frequency details. Currently we scale it by 0.1 because it seems to work good in practice, we can adjust the value in the future if it turns out to be impractical. Ref: #122892 Pull Request: https://projects.blender.org/blender/blender/pulls/133991
78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/* SPDX-FileCopyrightText: 2009-2010 Sony Pictures Imageworks Inc., et al. All Rights Reserved.
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* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Adapted code from Open Shading Language. */
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#ifndef CCL_STDCYCLESOSL_H
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#define CCL_STDCYCLESOSL_H
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#include "stdosl.h"
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// Constants
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#define FLT_MAX 3.402823466e+38 // max value
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/* Offset of coordinates for evaluating bump node. Unit in pixel.
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* NOTE: keep the same as SVM. */
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#define BUMP_DX 0.1
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#define BUMP_DY BUMP_DX
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// Declaration of built-in functions and closures, stdosl.h does not make
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// these available so we have to redefine them.
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#define BUILTIN [[int builtin = 1]]
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#define BUILTIN_DERIV [[ int builtin = 1, int deriv = 1 ]]
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closure color diffuse_ramp(normal N, color colors[8]) BUILTIN;
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closure color phong_ramp(normal N, float exponent, color colors[8]) BUILTIN;
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closure color diffuse_toon(normal N, float size, float smooth) BUILTIN;
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closure color glossy_toon(normal N, float size, float smooth) BUILTIN;
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closure color ashikhmin_velvet(normal N, float sigma) BUILTIN;
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closure color sheen(normal N, float roughness) BUILTIN;
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closure color ambient_occlusion() BUILTIN;
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closure color microfacet_f82_tint(
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string distribution, vector N, vector T, float ax, float ay, color f0, color f82) BUILTIN;
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/* Needed to pass along the color for multi-scattering saturation adjustment,
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* otherwise could be replaced by microfacet() */
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closure color microfacet_multi_ggx_glass(normal N, float ag, float eta, color C) BUILTIN;
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closure color microfacet_multi_ggx_aniso(normal N, vector T, float ax, float ay, color C) BUILTIN;
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// BSSRDF
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closure color bssrdf(string method, normal N, vector radius, color albedo) BUILTIN;
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// Hair
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closure color
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hair_reflection(normal N, float roughnessu, float roughnessv, vector T, float offset) BUILTIN;
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closure color
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hair_transmission(normal N, float roughnessu, float roughnessv, vector T, float offset) BUILTIN;
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closure color hair_chiang(normal N,
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color sigma,
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float roughnessu,
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float roughnessv,
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float coat,
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float alpha,
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float eta) BUILTIN;
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closure color hair_huang(normal N,
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color sigma,
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float roughness,
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float tilt,
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float eta,
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float aspect_ratio,
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float r_lobe,
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float tt_lobe,
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float trt_lobe) BUILTIN;
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// Volume
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closure color henyey_greenstein(float g) BUILTIN;
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closure color fournier_forand(float B, float IOR) BUILTIN;
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closure color draine(float g, float alpha) BUILTIN;
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closure color rayleigh() BUILTIN;
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closure color absorption() BUILTIN;
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// Ray Portal
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closure color ray_portal_bsdf(vector position, vector direction) BUILTIN;
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#endif /* CCL_STDOSL_H */
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