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Diffstat (limited to 'intern/cycles/kernel/shaders/node_principled_bsdf.osl')
-rw-r--r--intern/cycles/kernel/shaders/node_principled_bsdf.osl245
1 files changed, 139 insertions, 106 deletions
diff --git a/intern/cycles/kernel/shaders/node_principled_bsdf.osl b/intern/cycles/kernel/shaders/node_principled_bsdf.osl
index 6f54ba3a462..657ced9b6e6 100644
--- a/intern/cycles/kernel/shaders/node_principled_bsdf.osl
+++ b/intern/cycles/kernel/shaders/node_principled_bsdf.osl
@@ -17,111 +17,144 @@
#include "stdosl.h"
#include "node_fresnel.h"
-shader node_principled_bsdf(
- string distribution = "Multiscatter GGX",
- string subsurface_method = "burley",
- color BaseColor = color(0.8, 0.8, 0.8),
- float Subsurface = 0.0,
- vector SubsurfaceRadius = vector(1.0, 1.0, 1.0),
- color SubsurfaceColor = color(0.7, 0.1, 0.1),
- float Metallic = 0.0,
- float Specular = 0.5,
- float SpecularTint = 0.0,
- float Roughness = 0.5,
- float Anisotropic = 0.0,
- float AnisotropicRotation = 0.0,
- float Sheen = 0.0,
- float SheenTint = 0.5,
- float Clearcoat = 0.0,
- float ClearcoatRoughness = 0.03,
- float IOR = 1.45,
- float Transmission = 0.0,
- float TransmissionRoughness = 0.0,
- normal Normal = N,
- normal ClearcoatNormal = N,
- normal Tangent = normalize(dPdu),
- output closure color BSDF = 0)
+shader node_principled_bsdf(string distribution = "Multiscatter GGX",
+ string subsurface_method = "burley",
+ color BaseColor = color(0.8, 0.8, 0.8),
+ float Subsurface = 0.0,
+ vector SubsurfaceRadius = vector(1.0, 1.0, 1.0),
+ color SubsurfaceColor = color(0.7, 0.1, 0.1),
+ float Metallic = 0.0,
+ float Specular = 0.5,
+ float SpecularTint = 0.0,
+ float Roughness = 0.5,
+ float Anisotropic = 0.0,
+ float AnisotropicRotation = 0.0,
+ float Sheen = 0.0,
+ float SheenTint = 0.5,
+ float Clearcoat = 0.0,
+ float ClearcoatRoughness = 0.03,
+ float IOR = 1.45,
+ float Transmission = 0.0,
+ float TransmissionRoughness = 0.0,
+ normal Normal = N,
+ normal ClearcoatNormal = N,
+ normal Tangent = normalize(dPdu),
+ output closure color BSDF = 0)
{
- float f = max(IOR, 1e-5);
- float diffuse_weight = (1.0 - clamp(Metallic, 0.0, 1.0)) * (1.0 - clamp(Transmission, 0.0, 1.0));
- float final_transmission = clamp(Transmission, 0.0, 1.0) * (1.0 - clamp(Metallic, 0.0, 1.0));
- float specular_weight = (1.0 - final_transmission);
-
- vector T = Tangent;
-
- float m_cdlum = luminance(BaseColor);
- color m_ctint = m_cdlum > 0.0 ? BaseColor / m_cdlum : color(0.0, 0.0, 0.0); // normalize lum. to isolate hue+sat
-
- /* rotate tangent */
- if (AnisotropicRotation != 0.0)
- T = rotate(T, AnisotropicRotation * M_2PI, point(0.0, 0.0, 0.0), Normal);
-
- if (diffuse_weight > 1e-5) {
- if (Subsurface > 1e-5) {
- color mixed_ss_base_color = SubsurfaceColor * Subsurface + BaseColor * (1.0 - Subsurface);
- if (subsurface_method == "burley") {
- BSDF = mixed_ss_base_color * bssrdf("principled", Normal, Subsurface * SubsurfaceRadius, SubsurfaceColor, "roughness", Roughness);
- }
- else {
- BSDF = mixed_ss_base_color * bssrdf("principled_random_walk", Normal, Subsurface * SubsurfaceRadius, mixed_ss_base_color, "roughness", Roughness);
- }
- }
- else {
- BSDF = BaseColor * principled_diffuse(Normal, Roughness);
- }
-
- if (Sheen > 1e-5) {
- color sheen_color = color(1.0, 1.0, 1.0) * (1.0 - SheenTint) + m_ctint * SheenTint;
-
- BSDF = BSDF + sheen_color * Sheen * principled_sheen(Normal);
- }
-
- BSDF = BSDF * diffuse_weight;
- }
-
- if (specular_weight > 1e-5) {
- float aspect = sqrt(1.0 - Anisotropic * 0.9);
- float r2 = Roughness * Roughness;
-
- float alpha_x = r2 / aspect;
- float alpha_y = r2 * aspect;
-
- color tmp_col = color(1.0, 1.0, 1.0) * (1.0 - SpecularTint) + m_ctint * SpecularTint;
-
- color Cspec0 = (Specular * 0.08 * tmp_col) * (1.0 - Metallic) + BaseColor * Metallic;
-
- if (distribution == "GGX" || Roughness <= 0.075) {
- BSDF = BSDF + specular_weight * microfacet_ggx_aniso_fresnel(Normal, T, alpha_x, alpha_y, (2.0 / (1.0 - sqrt(0.08 * Specular))) - 1.0, BaseColor, Cspec0);
- } else {
- BSDF = BSDF + specular_weight * microfacet_multi_ggx_aniso_fresnel(Normal, T, alpha_x, alpha_y, (2.0 / (1.0 - sqrt(0.08 * Specular))) - 1.0, BaseColor, Cspec0);
- }
- }
-
- if (final_transmission > 1e-5) {
- color Cspec0 = BaseColor * SpecularTint + color(1.0, 1.0, 1.0) * (1.0 - SpecularTint);
- float eta = backfacing() ? 1.0 / f : f;
-
- if (distribution == "GGX" || Roughness <= 5e-2) {
- float cosNO = dot(Normal, I);
- float Fr = fresnel_dielectric_cos(cosNO, eta);
-
- float refl_roughness = Roughness;
- if (Roughness <= 1e-2)
- refl_roughness = 0.0;
-
- float transmission_roughness = refl_roughness;
- if (distribution == "GGX")
- transmission_roughness = 1.0 - (1.0 - refl_roughness) * (1.0 - TransmissionRoughness);
-
- BSDF = BSDF + final_transmission * (Fr * microfacet_ggx_fresnel(Normal, refl_roughness * refl_roughness, eta, BaseColor, Cspec0) +
- (1.0 - Fr) * BaseColor * microfacet_ggx_refraction(Normal, transmission_roughness * transmission_roughness, eta));
- } else {
- BSDF = BSDF + final_transmission * microfacet_multi_ggx_glass_fresnel(Normal, Roughness * Roughness, eta, BaseColor, Cspec0);
- }
- }
-
- if (Clearcoat > 1e-5) {
- BSDF = BSDF + principled_clearcoat(ClearcoatNormal, Clearcoat, ClearcoatRoughness * ClearcoatRoughness);
- }
+ float f = max(IOR, 1e-5);
+ float diffuse_weight = (1.0 - clamp(Metallic, 0.0, 1.0)) * (1.0 - clamp(Transmission, 0.0, 1.0));
+ float final_transmission = clamp(Transmission, 0.0, 1.0) * (1.0 - clamp(Metallic, 0.0, 1.0));
+ float specular_weight = (1.0 - final_transmission);
+
+ vector T = Tangent;
+
+ float m_cdlum = luminance(BaseColor);
+ color m_ctint = m_cdlum > 0.0 ? BaseColor / m_cdlum :
+ color(0.0, 0.0, 0.0); // normalize lum. to isolate hue+sat
+
+ /* rotate tangent */
+ if (AnisotropicRotation != 0.0)
+ T = rotate(T, AnisotropicRotation * M_2PI, point(0.0, 0.0, 0.0), Normal);
+
+ if (diffuse_weight > 1e-5) {
+ if (Subsurface > 1e-5) {
+ color mixed_ss_base_color = SubsurfaceColor * Subsurface + BaseColor * (1.0 - Subsurface);
+ if (subsurface_method == "burley") {
+ BSDF = mixed_ss_base_color * bssrdf("principled",
+ Normal,
+ Subsurface * SubsurfaceRadius,
+ SubsurfaceColor,
+ "roughness",
+ Roughness);
+ }
+ else {
+ BSDF = mixed_ss_base_color * bssrdf("principled_random_walk",
+ Normal,
+ Subsurface * SubsurfaceRadius,
+ mixed_ss_base_color,
+ "roughness",
+ Roughness);
+ }
+ }
+ else {
+ BSDF = BaseColor * principled_diffuse(Normal, Roughness);
+ }
+
+ if (Sheen > 1e-5) {
+ color sheen_color = color(1.0, 1.0, 1.0) * (1.0 - SheenTint) + m_ctint * SheenTint;
+
+ BSDF = BSDF + sheen_color * Sheen * principled_sheen(Normal);
+ }
+
+ BSDF = BSDF * diffuse_weight;
+ }
+
+ if (specular_weight > 1e-5) {
+ float aspect = sqrt(1.0 - Anisotropic * 0.9);
+ float r2 = Roughness * Roughness;
+
+ float alpha_x = r2 / aspect;
+ float alpha_y = r2 * aspect;
+
+ color tmp_col = color(1.0, 1.0, 1.0) * (1.0 - SpecularTint) + m_ctint * SpecularTint;
+
+ color Cspec0 = (Specular * 0.08 * tmp_col) * (1.0 - Metallic) + BaseColor * Metallic;
+
+ if (distribution == "GGX" || Roughness <= 0.075) {
+ BSDF = BSDF + specular_weight *
+ microfacet_ggx_aniso_fresnel(Normal,
+ T,
+ alpha_x,
+ alpha_y,
+ (2.0 / (1.0 - sqrt(0.08 * Specular))) - 1.0,
+ BaseColor,
+ Cspec0);
+ }
+ else {
+ BSDF = BSDF + specular_weight * microfacet_multi_ggx_aniso_fresnel(
+ Normal,
+ T,
+ alpha_x,
+ alpha_y,
+ (2.0 / (1.0 - sqrt(0.08 * Specular))) - 1.0,
+ BaseColor,
+ Cspec0);
+ }
+ }
+
+ if (final_transmission > 1e-5) {
+ color Cspec0 = BaseColor * SpecularTint + color(1.0, 1.0, 1.0) * (1.0 - SpecularTint);
+ float eta = backfacing() ? 1.0 / f : f;
+
+ if (distribution == "GGX" || Roughness <= 5e-2) {
+ float cosNO = dot(Normal, I);
+ float Fr = fresnel_dielectric_cos(cosNO, eta);
+
+ float refl_roughness = Roughness;
+ if (Roughness <= 1e-2)
+ refl_roughness = 0.0;
+
+ float transmission_roughness = refl_roughness;
+ if (distribution == "GGX")
+ transmission_roughness = 1.0 - (1.0 - refl_roughness) * (1.0 - TransmissionRoughness);
+
+ BSDF = BSDF +
+ final_transmission *
+ (Fr * microfacet_ggx_fresnel(
+ Normal, refl_roughness * refl_roughness, eta, BaseColor, Cspec0) +
+ (1.0 - Fr) * BaseColor *
+ microfacet_ggx_refraction(
+ Normal, transmission_roughness * transmission_roughness, eta));
+ }
+ else {
+ BSDF = BSDF +
+ final_transmission * microfacet_multi_ggx_glass_fresnel(
+ Normal, Roughness * Roughness, eta, BaseColor, Cspec0);
+ }
+ }
+
+ if (Clearcoat > 1e-5) {
+ BSDF = BSDF + principled_clearcoat(
+ ClearcoatNormal, Clearcoat, ClearcoatRoughness * ClearcoatRoughness);
+ }
}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 09:43:07 +0300