fe213f80a4
This is the first step of moving the create infos back inside shader sources. All info files are now treated as source files. However, they are not considered in the include tree yet. This will come in another following PR. Each shader source file now generate a `.info` file containing only the create info declarations. This renames all info files so that they do not conflict with their previous versions that were copied (non-generated). Pull Request: https://projects.blender.org/blender/blender/pulls/146676
87 lines
2.2 KiB
GLSL
87 lines
2.2 KiB
GLSL
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include "infos/eevee_common_infos.hh"
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/**
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* BxDF evaluation functions.
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*/
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struct BsdfSample {
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packed_float3 direction;
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float pdf;
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};
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struct BsdfEval {
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float throughput;
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float pdf;
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/* `throughput / pdf`. */
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float weight;
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};
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struct ClosureLight {
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/* LTC matrix. */
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packed_float4 ltc_mat;
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/* Shading normal. */
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packed_float3 N;
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/* Enum used as index to fetch which light intensity to use [0..3]. */
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LightingType type;
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/* Output both shadowed and unshadowed for shadow denoising. */
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packed_float3 light_shadowed;
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packed_float3 light_unshadowed;
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METAL_CONSTRUCTOR_5(ClosureLight,
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packed_float4,
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ltc_mat,
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packed_float3,
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N,
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LightingType,
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type,
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packed_float3,
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light_shadowed,
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packed_float3,
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light_unshadowed)
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static ClosureLight zero()
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{
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return ClosureLight(float4(0), float3(0), LIGHT_DIFFUSE, float3(0), float3(0));
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}
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};
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/* Represent an approximation of a bunch of rays from a BSDF. */
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struct LightProbeRay {
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/* Average direction of sampled rays or its approximation.
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* Magnitude will reduce directionality of spherical harmonic evaluation. */
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packed_float3 dominant_direction;
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/* Perceptual roughness in [0..1] range.
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* Modulate blur level of spherical probe and blend between sphere probe and spherical harmonic
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* evaluation at higher roughness. */
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float perceptual_roughness;
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};
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/* -------------------------------------------------------------------- */
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/** \name Utils
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* \{ */
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/* Fresnel monochromatic, perfect mirror */
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float F_eta(float eta, float cos_theta)
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{
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/* Compute fresnel reflectance without explicitly computing
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* the refracted direction. */
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float c = abs(cos_theta);
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float g = eta * eta - 1.0f + c * c;
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if (g > 0.0f) {
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g = sqrt(g);
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float A = (g - c) / (g + c);
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float B = (c * (g + c) - 1.0f) / (c * (g - c) + 1.0f);
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return 0.5f * A * A * (1.0f + B * B);
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}
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/* Total internal reflections. */
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return 1.0f;
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}
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/** \} */
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