ea989ebf94
Even if related, they don't have the same performance impact. To avoid any performance hit, we replace the Diffuse by a Subsurface Closure for legacy EEVEE and use the subsurface closure only where needed for EEVEE-Next leveraging the random sampling. This increases the compatibility with cycles that doesn't modulate the radius of the subsurface anymore. This change is only present in EEVEE-Next. This commit changes the principled BSDF code so that it is easier to follow the flow of data. For legacy EEVEE, the SSS switch is moved to a `radius == -1` check.
72 lines
2.4 KiB
GLSL
72 lines
2.4 KiB
GLSL
/* SPDX-FileCopyrightText: 2022-2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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void node_bsdf_hair(vec4 color,
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float offset,
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float roughness_u,
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float roughness_v,
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vec3 T,
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float weight,
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out Closure result)
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{
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color = max(color, vec4(0.0));
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#if 0
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/* NOTE(fclem): This is the way it should be. But we don't have proper implementation of the hair
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* closure yet. For now fall back to a simpler diffuse surface so that we have at least a color
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* feedback. */
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ClosureHair hair_data;
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hair_data.weight = weight;
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hair_data.color = color.rgb;
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hair_data.offset = offset;
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hair_data.roughness = vec2(roughness_u, roughness_v);
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hair_data.T = T;
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#else
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ClosureDiffuse hair_data;
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hair_data.weight = weight;
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hair_data.color = color.rgb;
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hair_data.N = g_data.N;
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#endif
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result = closure_eval(hair_data);
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}
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void node_bsdf_hair_principled(vec4 color,
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float melanin,
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float melanin_redness,
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vec4 tint,
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vec3 absorption_coefficient,
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float roughness,
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float radial_roughness,
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float coat,
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float ior,
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float offset,
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float aspect_ratio,
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float R,
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float TT,
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float TRT,
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float random_color,
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float random_roughness,
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float random,
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float weight,
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out Closure result)
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{
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/* Placeholder closure.
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* Some computation will have to happen here just like the Principled BSDF.
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* For now fall back to a simpler diffuse surface so that we have at least a color feedback. */
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#if 0
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ClosureHair hair_data;
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hair_data.weight = weight;
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hair_data.color = color.rgb;
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hair_data.offset = offset;
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hair_data.roughness = vec2(0.0);
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hair_data.T = g_data.curve_B;
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#else
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ClosureDiffuse hair_data;
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hair_data.weight = weight;
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hair_data.color = color.rgb;
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hair_data.N = g_data.N;
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#endif
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result = closure_eval(hair_data);
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}
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