diff options
Diffstat (limited to 'intern/cycles/kernel/shaders/node_principled_hair_bsdf.osl')
| -rw-r--r-- | intern/cycles/kernel/shaders/node_principled_hair_bsdf.osl | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/intern/cycles/kernel/shaders/node_principled_hair_bsdf.osl b/intern/cycles/kernel/shaders/node_principled_hair_bsdf.osl index 757a88f8ece..bf986438fca 100644 --- a/intern/cycles/kernel/shaders/node_principled_hair_bsdf.osl +++ b/intern/cycles/kernel/shaders/node_principled_hair_bsdf.osl @@ -18,88 +18,88 @@ color log3(color a) { - return color(log(a[0]), log(a[1]), log(a[2])); + return color(log(a[0]), log(a[1]), log(a[2])); } color sigma_from_concentration(float eumelanin, float pheomelanin) { - return eumelanin*color(0.506, 0.841, 1.653) + pheomelanin*color(0.343, 0.733, 1.924); + return eumelanin * color(0.506, 0.841, 1.653) + pheomelanin * color(0.343, 0.733, 1.924); } color sigma_from_reflectance(color c, float azimuthal_roughness) { - float x = azimuthal_roughness; - float roughness_fac = (((((0.245*x) + 5.574)*x - 10.73)*x + 2.532)*x - 0.215)*x + 5.969; - color sigma = log3(c) / roughness_fac; - return sigma * sigma; + float x = azimuthal_roughness; + float roughness_fac = (((((0.245 * x) + 5.574) * x - 10.73) * x + 2.532) * x - 0.215) * x + + 5.969; + color sigma = log3(c) / roughness_fac; + return sigma * sigma; } -shader node_principled_hair_bsdf( - color Color = color(0.017513, 0.005763, 0.002059), - float Melanin = 0.8, - float MelaninRedness = 1.0, - float RandomColor = 0.0, - color Tint = 1.0, - color AbsorptionCoefficient = color(0.245531, 0.52, 1.365), - normal Normal = Ng, - string parametrization = "Absorption coefficient", - float Offset = radians(2), - float Roughness = 0.3, - float RadialRoughness = 0.3, - float RandomRoughness = 0.0, - float Coat = 0.0, - float IOR = 1.55, - string AttrRandom = "geom:curve_random", - float Random = 0.0, +shader node_principled_hair_bsdf(color Color = color(0.017513, 0.005763, 0.002059), + float Melanin = 0.8, + float MelaninRedness = 1.0, + float RandomColor = 0.0, + color Tint = 1.0, + color AbsorptionCoefficient = color(0.245531, 0.52, 1.365), + normal Normal = Ng, + string parametrization = "Absorption coefficient", + float Offset = radians(2), + float Roughness = 0.3, + float RadialRoughness = 0.3, + float RandomRoughness = 0.0, + float Coat = 0.0, + float IOR = 1.55, + string AttrRandom = "geom:curve_random", + float Random = 0.0, - output closure color BSDF = 0) + output closure color BSDF = 0) { - /* Get random value from curve in none is specified. */ - float random_value = 0.0; + /* Get random value from curve in none is specified. */ + float random_value = 0.0; - if (isconnected(Random)) { - random_value = Random; - } - else { - getattribute(AttrRandom, random_value); - } + if (isconnected(Random)) { + random_value = Random; + } + else { + getattribute(AttrRandom, random_value); + } - /* Compute roughness. */ - float factor_random_roughness = 1.0 + 2.0*(random_value - 0.5)*RandomRoughness; - float m0_roughness = 1.0 - clamp(Coat, 0.0, 1.0); - float roughness = Roughness*factor_random_roughness; - float radial_roughness = RadialRoughness*factor_random_roughness; + /* Compute roughness. */ + float factor_random_roughness = 1.0 + 2.0 * (random_value - 0.5) * RandomRoughness; + float m0_roughness = 1.0 - clamp(Coat, 0.0, 1.0); + float roughness = Roughness * factor_random_roughness; + float radial_roughness = RadialRoughness * factor_random_roughness; - /* Compute absorption. */ - color sigma; + /* Compute absorption. */ + color sigma; - if (parametrization == "Absorption coefficient") { - sigma = AbsorptionCoefficient; - } - else if (parametrization == "Melanin concentration") { - /* Randomize melanin. */ - float factor_random_color = 1.0 + 2.0*(random_value - 0.5) * RandomColor; - float melanin = Melanin * factor_random_color; + if (parametrization == "Absorption coefficient") { + sigma = AbsorptionCoefficient; + } + else if (parametrization == "Melanin concentration") { + /* Randomize melanin. */ + float factor_random_color = 1.0 + 2.0 * (random_value - 0.5) * RandomColor; + float melanin = Melanin * factor_random_color; - /* Map melanin 0..inf from more perceptually linear 0..1. */ - melanin = -log(max(1.0 - melanin, 0.0001)); + /* Map melanin 0..inf from more perceptually linear 0..1. */ + melanin = -log(max(1.0 - melanin, 0.0001)); - /* Benedikt Bitterli's melanin ratio remapping. */ - float eumelanin = melanin * (1.0 - MelaninRedness); - float pheomelanin = melanin * MelaninRedness; - color melanin_sigma = sigma_from_concentration(eumelanin, pheomelanin); + /* Benedikt Bitterli's melanin ratio remapping. */ + float eumelanin = melanin * (1.0 - MelaninRedness); + float pheomelanin = melanin * MelaninRedness; + color melanin_sigma = sigma_from_concentration(eumelanin, pheomelanin); - /* Optional tint. */ - color tint_sigma = sigma_from_reflectance(Tint, radial_roughness); - sigma = melanin_sigma + tint_sigma; - } - else if (parametrization == "Direct coloring"){ - sigma = sigma_from_reflectance(Color, radial_roughness); - } - else { - /* Fallback to brownish hair, same as defaults for melanin. */ - sigma = sigma_from_concentration(0.0, 0.8054375); - } + /* Optional tint. */ + color tint_sigma = sigma_from_reflectance(Tint, radial_roughness); + sigma = melanin_sigma + tint_sigma; + } + else if (parametrization == "Direct coloring") { + sigma = sigma_from_reflectance(Color, radial_roughness); + } + else { + /* Fallback to brownish hair, same as defaults for melanin. */ + sigma = sigma_from_concentration(0.0, 0.8054375); + } - BSDF = principled_hair(Normal, sigma, roughness, radial_roughness, m0_roughness, Offset, IOR); + BSDF = principled_hair(Normal, sigma, roughness, radial_roughness, m0_roughness, Offset, IOR); } |