diff options
Diffstat (limited to 'intern/cycles/kernel/osl/bsdf_microfacet.cpp')
| -rw-r--r-- | intern/cycles/kernel/osl/bsdf_microfacet.cpp | 558 |
1 files changed, 0 insertions, 558 deletions
diff --git a/intern/cycles/kernel/osl/bsdf_microfacet.cpp b/intern/cycles/kernel/osl/bsdf_microfacet.cpp deleted file mode 100644 index 8446dbbe982..00000000000 --- a/intern/cycles/kernel/osl/bsdf_microfacet.cpp +++ /dev/null @@ -1,558 +0,0 @@ -/* - * Adapted from Open Shading Language with this license: - * - * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al. - * All Rights Reserved. - * - * Modifications Copyright 2011, Blender Foundation. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * * Neither the name of Sony Pictures Imageworks nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <OpenImageIO/fmath.h> - -#include <OSL/genclosure.h> - -#include "osl_closures.h" - -#include "util_math.h" - -using namespace OSL; - -CCL_NAMESPACE_BEGIN - -// TODO: fresnel_dielectric is only used for derivatives, could be optimized - -// TODO: refactor these two classes so they share everything by the microfacet -// distribution terms - -// microfacet model with GGX facet distribution -// see http://www.graphics.cornell.edu/~bjw/microfacetbsdf.pdf -template <int Refractive = 0> -class MicrofacetGGXClosure : public BSDFClosure { -public: - Vec3 m_N; - float m_ag; // width parameter (roughness) - float m_eta; // index of refraction (for fresnel term) - MicrofacetGGXClosure() : BSDFClosure(Labels::GLOSSY, Refractive ? Back : Front) { m_eta = 1.0f; } - - void setup() - { - m_ag = clamp(m_ag, 1e-5f, 1.0f); - } - - bool mergeable(const ClosurePrimitive *other) const { - const MicrofacetGGXClosure *comp = (const MicrofacetGGXClosure *)other; - return m_N == comp->m_N && m_ag == comp->m_ag && - m_eta == comp->m_eta && BSDFClosure::mergeable(other); - } - - size_t memsize() const { return sizeof(*this); } - - const char *name() const { - return Refractive ? "microfacet_ggx_refraction" : "microfacet_ggx"; - } - - void print_on(std::ostream &out) const { - out << name() << " ("; - out << "(" << m_N[0] << ", " << m_N[1] << ", " << m_N[2] << "), "; - out << m_ag << ", "; - out << m_eta; - out << ")"; - } - - float albedo(const Vec3 &omega_out) const - { - return 1.0f; - } - - Color3 eval_reflect(const Vec3 &omega_out, const Vec3 &omega_in, float& pdf) const - { - if (Refractive == 1) return Color3(0, 0, 0); - float cosNO = m_N.dot(omega_out); - float cosNI = m_N.dot(omega_in); - if (cosNI > 0 && cosNO > 0) { - // get half vector - Vec3 Hr = omega_in + omega_out; - Hr.normalize(); - // eq. 20: (F*G*D)/(4*in*on) - // eq. 33: first we calculate D(m) with m=Hr: - float alpha2 = m_ag * m_ag; - float cosThetaM = m_N.dot(Hr); - float cosThetaM2 = cosThetaM * cosThetaM; - float tanThetaM2 = (1 - cosThetaM2) / cosThetaM2; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = alpha2 / ((float) M_PI * cosThetaM4 * (alpha2 + tanThetaM2) * (alpha2 + tanThetaM2)); - // eq. 34: now calculate G1(i,m) and G1(o,m) - float G1o = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNO * cosNO) / (cosNO * cosNO))); - float G1i = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNI * cosNI) / (cosNI * cosNI))); - float G = G1o * G1i; - float out = (G * D) * 0.25f / cosNO; - // eq. 24 - float pm = D * cosThetaM; - // convert into pdf of the sampled direction - // eq. 38 - but see also: - // eq. 17 in http://www.graphics.cornell.edu/~bjw/wardnotes.pdf - pdf = pm * 0.25f / Hr.dot(omega_out); - return Color3(out, out, out); - } - return Color3(0, 0, 0); - } - - Color3 eval_transmit(const Vec3 &omega_out, const Vec3 &omega_in, float& pdf) const - { - if (Refractive == 0) return Color3(0, 0, 0); - float cosNO = m_N.dot(omega_out); - float cosNI = m_N.dot(omega_in); - if (cosNO <= 0 || cosNI >= 0) - return Color3(0, 0, 0); // vectors on same side -- not possible - // compute half-vector of the refraction (eq. 16) - Vec3 ht = -(m_eta * omega_in + omega_out); - Vec3 Ht = ht; Ht.normalize(); - float cosHO = Ht.dot(omega_out); - - float cosHI = Ht.dot(omega_in); - // eq. 33: first we calculate D(m) with m=Ht: - float alpha2 = m_ag * m_ag; - float cosThetaM = m_N.dot(Ht); - float cosThetaM2 = cosThetaM * cosThetaM; - float tanThetaM2 = (1 - cosThetaM2) / cosThetaM2; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = alpha2 / ((float) M_PI * cosThetaM4 * (alpha2 + tanThetaM2) * (alpha2 + tanThetaM2)); - // eq. 34: now calculate G1(i,m) and G1(o,m) - float G1o = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNO * cosNO) / (cosNO * cosNO))); - float G1i = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNI * cosNI) / (cosNI * cosNI))); - float G = G1o * G1i; - // probability - float invHt2 = 1 / ht.dot(ht); - pdf = D * fabsf(cosThetaM) * (fabsf(cosHI) * (m_eta * m_eta)) * invHt2; - float out = (fabsf(cosHI * cosHO) * (m_eta * m_eta) * (G * D) * invHt2) / cosNO; - return Color3(out, out, out); - } - - ustring sample(const Vec3 &Ng, - const Vec3 &omega_out, const Vec3 &domega_out_dx, const Vec3 &domega_out_dy, - float randu, float randv, - Vec3 &omega_in, Vec3 &domega_in_dx, Vec3 &domega_in_dy, - float &pdf, Color3 &eval) const - { - float cosNO = m_N.dot(omega_out); - if (cosNO > 0) { - Vec3 X, Y, Z = m_N; - make_orthonormals(Z, X, Y); - // generate a random microfacet normal m - // eq. 35,36: - // we take advantage of cos(atan(x)) == 1/sqrt(1+x^2) - // and sin(atan(x)) == x/sqrt(1+x^2) - float alpha2 = m_ag * m_ag; - float tanThetaM2 = alpha2 * randu / (1 - randu); - float cosThetaM = 1 / sqrtf(1 + tanThetaM2); - float sinThetaM = cosThetaM * sqrtf(tanThetaM2); - float phiM = 2 * float(M_PI) * randv; - Vec3 m = (cosf(phiM) * sinThetaM) * X + - (sinf(phiM) * sinThetaM) * Y + - cosThetaM * Z; - if (Refractive == 0) { - float cosMO = m.dot(omega_out); - if (cosMO > 0) { - // eq. 39 - compute actual reflected direction - omega_in = 2 * cosMO * m - omega_out; - if (Ng.dot(omega_in) > 0) { - // microfacet normal is visible to this ray - // eq. 33 - float cosThetaM2 = cosThetaM * cosThetaM; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = alpha2 / (float(M_PI) * cosThetaM4 * (alpha2 + tanThetaM2) * (alpha2 + tanThetaM2)); - // eq. 24 - float pm = D * cosThetaM; - // convert into pdf of the sampled direction - // eq. 38 - but see also: - // eq. 17 in http://www.graphics.cornell.edu/~bjw/wardnotes.pdf - pdf = pm * 0.25f / cosMO; - // eval BRDF*cosNI - float cosNI = m_N.dot(omega_in); - // eq. 34: now calculate G1(i,m) and G1(o,m) - float G1o = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNO * cosNO) / (cosNO * cosNO))); - float G1i = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNI * cosNI) / (cosNI * cosNI))); - float G = G1o * G1i; - // eq. 20: (F*G*D)/(4*in*on) - float out = (G * D) * 0.25f / cosNO; - eval.setValue(out, out, out); - domega_in_dx = (2 * m.dot(domega_out_dx)) * m - domega_out_dx; - domega_in_dy = (2 * m.dot(domega_out_dy)) * m - domega_out_dy; - - /* disabled for now - gives texture filtering problems */ -#if 0 - // Since there is some blur to this reflection, make the - // derivatives a bit bigger. In theory this varies with the - // roughness but the exact relationship is complex and - // requires more ops than are practical. - domega_in_dx *= 10; - domega_in_dy *= 10; -#endif - } - } - } - else { - // CAUTION: the i and o variables are inverted relative to the paper - // eq. 39 - compute actual refractive direction - Vec3 R, dRdx, dRdy; - Vec3 T, dTdx, dTdy; - bool inside; - fresnel_dielectric(m_eta, m, omega_out, domega_out_dx, domega_out_dy, - R, dRdx, dRdy, - T, dTdx, dTdy, - inside); - - if (!inside) { - omega_in = T; - domega_in_dx = dTdx; - domega_in_dy = dTdy; - // eq. 33 - float cosThetaM2 = cosThetaM * cosThetaM; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = alpha2 / (float(M_PI) * cosThetaM4 * (alpha2 + tanThetaM2) * (alpha2 + tanThetaM2)); - // eq. 24 - float pm = D * cosThetaM; - // eval BRDF*cosNI - float cosNI = m_N.dot(omega_in); - // eq. 34: now calculate G1(i,m) and G1(o,m) - float G1o = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNO * cosNO) / (cosNO * cosNO))); - float G1i = 2 / (1 + sqrtf(1 + alpha2 * (1 - cosNI * cosNI) / (cosNI * cosNI))); - float G = G1o * G1i; - // eq. 21 - float cosHI = m.dot(omega_in); - float cosHO = m.dot(omega_out); - float Ht2 = m_eta * cosHI + cosHO; - Ht2 *= Ht2; - float out = (fabsf(cosHI * cosHO) * (m_eta * m_eta) * (G * D)) / (cosNO * Ht2); - // eq. 38 and eq. 17 - pdf = pm * (m_eta * m_eta) * fabsf(cosHI) / Ht2; - eval.setValue(out, out, out); - - /* disabled for now - gives texture filtering problems */ -#if 0 - // Since there is some blur to this refraction, make the - // derivatives a bit bigger. In theory this varies with the - // roughness but the exact relationship is complex and - // requires more ops than are practical. - domega_in_dx *= 10; - domega_in_dy *= 10; -#endif - } - } - } - return Refractive ? Labels::TRANSMIT : Labels::REFLECT; - } -}; - -// microfacet model with Beckmann facet distribution -// see http://www.graphics.cornell.edu/~bjw/microfacetbsdf.pdf -template <int Refractive = 0> -class MicrofacetBeckmannClosure : public BSDFClosure { -public: - Vec3 m_N; - float m_ab; // width parameter (roughness) - float m_eta; // index of refraction (for fresnel term) - MicrofacetBeckmannClosure() : BSDFClosure(Labels::GLOSSY, Refractive ? Back : Front) { - } - - void setup() - { - m_ab = clamp(m_ab, 1e-5f, 1.0f); - } - - bool mergeable(const ClosurePrimitive *other) const { - const MicrofacetBeckmannClosure *comp = (const MicrofacetBeckmannClosure *)other; - return m_N == comp->m_N && m_ab == comp->m_ab && - m_eta == comp->m_eta && BSDFClosure::mergeable(other); - } - - size_t memsize() const { - return sizeof(*this); - } - - const char *name() const { - return Refractive ? "microfacet_beckmann_refraction" - : "microfacet_beckmann"; - } - - void print_on(std::ostream &out) const - { - out << name() << " ("; - out << "(" << m_N[0] << ", " << m_N[1] << ", " << m_N[2] << "), "; - out << m_ab << ", "; - out << m_eta; - out << ")"; - } - - float albedo(const Vec3 &omega_out) const - { - return 1.0f; - } - - Color3 eval_reflect(const Vec3 &omega_out, const Vec3 &omega_in, float& pdf) const - { - if (Refractive == 1) return Color3(0, 0, 0); - float cosNO = m_N.dot(omega_out); - float cosNI = m_N.dot(omega_in); - if (cosNO > 0 && cosNI > 0) { - // get half vector - Vec3 Hr = omega_in + omega_out; - Hr.normalize(); - // eq. 20: (F*G*D)/(4*in*on) - // eq. 25: first we calculate D(m) with m=Hr: - float alpha2 = m_ab * m_ab; - float cosThetaM = m_N.dot(Hr); - float cosThetaM2 = cosThetaM * cosThetaM; - float tanThetaM2 = (1 - cosThetaM2) / cosThetaM2; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = expf(-tanThetaM2 / alpha2) / (float(M_PI) * alpha2 * cosThetaM4); - // eq. 26, 27: now calculate G1(i,m) and G1(o,m) - float ao = 1 / (m_ab * sqrtf((1 - cosNO * cosNO) / (cosNO * cosNO))); - float ai = 1 / (m_ab * sqrtf((1 - cosNI * cosNI) / (cosNI * cosNI))); - float G1o = ao < 1.6f ? (3.535f * ao + 2.181f * ao * ao) / (1 + 2.276f * ao + 2.577f * ao * ao) : 1.0f; - float G1i = ai < 1.6f ? (3.535f * ai + 2.181f * ai * ai) / (1 + 2.276f * ai + 2.577f * ai * ai) : 1.0f; - float G = G1o * G1i; - float out = (G * D) * 0.25f / cosNO; - // eq. 24 - float pm = D * cosThetaM; - // convert into pdf of the sampled direction - // eq. 38 - but see also: - // eq. 17 in http://www.graphics.cornell.edu/~bjw/wardnotes.pdf - pdf = pm * 0.25f / Hr.dot(omega_out); - return Color3(out, out, out); - } - return Color3(0, 0, 0); - } - - Color3 eval_transmit(const Vec3 &omega_out, const Vec3 &omega_in, float& pdf) const - { - if (Refractive == 0) return Color3(0, 0, 0); - float cosNO = m_N.dot(omega_out); - float cosNI = m_N.dot(omega_in); - if (cosNO <= 0 || cosNI >= 0) - return Color3(0, 0, 0); - // compute half-vector of the refraction (eq. 16) - Vec3 ht = -(m_eta * omega_in + omega_out); - Vec3 Ht = ht; Ht.normalize(); - float cosHO = Ht.dot(omega_out); - - float cosHI = Ht.dot(omega_in); - // eq. 33: first we calculate D(m) with m=Ht: - float alpha2 = m_ab * m_ab; - float cosThetaM = m_N.dot(Ht); - float cosThetaM2 = cosThetaM * cosThetaM; - float tanThetaM2 = (1 - cosThetaM2) / cosThetaM2; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = expf(-tanThetaM2 / alpha2) / (float(M_PI) * alpha2 * cosThetaM4); - // eq. 26, 27: now calculate G1(i,m) and G1(o,m) - float ao = 1 / (m_ab * sqrtf((1 - cosNO * cosNO) / (cosNO * cosNO))); - float ai = 1 / (m_ab * sqrtf((1 - cosNI * cosNI) / (cosNI * cosNI))); - float G1o = ao < 1.6f ? (3.535f * ao + 2.181f * ao * ao) / (1 + 2.276f * ao + 2.577f * ao * ao) : 1.0f; - float G1i = ai < 1.6f ? (3.535f * ai + 2.181f * ai * ai) / (1 + 2.276f * ai + 2.577f * ai * ai) : 1.0f; - float G = G1o * G1i; - // probability - float invHt2 = 1 / ht.dot(ht); - pdf = D * fabsf(cosThetaM) * (fabsf(cosHI) * (m_eta * m_eta)) * invHt2; - float out = (fabsf(cosHI * cosHO) * (m_eta * m_eta) * (G * D) * invHt2) / cosNO; - return Color3(out, out, out); - } - - ustring sample(const Vec3 &Ng, - const Vec3 &omega_out, const Vec3 &domega_out_dx, const Vec3 &domega_out_dy, - float randu, float randv, - Vec3 &omega_in, Vec3 &domega_in_dx, Vec3 &domega_in_dy, - float &pdf, Color3 &eval) const - { - float cosNO = m_N.dot(omega_out); - if (cosNO > 0) { - Vec3 X, Y, Z = m_N; - make_orthonormals(Z, X, Y); - // generate a random microfacet normal m - // eq. 35,36: - // we take advantage of cos(atan(x)) == 1/sqrt(1+x^2) - // and sin(atan(x)) == x/sqrt(1+x^2) - float alpha2 = m_ab * m_ab; - float tanThetaM = sqrtf(-alpha2 * logf(1 - randu)); - float cosThetaM = 1 / sqrtf(1 + tanThetaM * tanThetaM); - float sinThetaM = cosThetaM * tanThetaM; - float phiM = 2 * float(M_PI) * randv; - Vec3 m = (cosf(phiM) * sinThetaM) * X + - (sinf(phiM) * sinThetaM) * Y + - cosThetaM * Z; - if (Refractive == 0) { - float cosMO = m.dot(omega_out); - if (cosMO > 0) { - // eq. 39 - compute actual reflected direction - omega_in = 2 * cosMO * m - omega_out; - if (Ng.dot(omega_in) > 0) { - // microfacet normal is visible to this ray - // eq. 25 - float cosThetaM2 = cosThetaM * cosThetaM; - float tanThetaM2 = tanThetaM * tanThetaM; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = expf(-tanThetaM2 / alpha2) / (float(M_PI) * alpha2 * cosThetaM4); - // eq. 24 - float pm = D * cosThetaM; - // convert into pdf of the sampled direction - // eq. 38 - but see also: - // eq. 17 in http://www.graphics.cornell.edu/~bjw/wardnotes.pdf - pdf = pm * 0.25f / cosMO; - // Eval BRDF*cosNI - float cosNI = m_N.dot(omega_in); - // eq. 26, 27: now calculate G1(i,m) and G1(o,m) - float ao = 1 / (m_ab * sqrtf((1 - cosNO * cosNO) / (cosNO * cosNO))); - float ai = 1 / (m_ab * sqrtf((1 - cosNI * cosNI) / (cosNI * cosNI))); - float G1o = ao < 1.6f ? (3.535f * ao + 2.181f * ao * ao) / (1 + 2.276f * ao + 2.577f * ao * ao) : 1.0f; - float G1i = ai < 1.6f ? (3.535f * ai + 2.181f * ai * ai) / (1 + 2.276f * ai + 2.577f * ai * ai) : 1.0f; - float G = G1o * G1i; - // eq. 20: (F*G*D)/(4*in*on) - float out = (G * D) * 0.25f / cosNO; - eval.setValue(out, out, out); - domega_in_dx = (2 * m.dot(domega_out_dx)) * m - domega_out_dx; - domega_in_dy = (2 * m.dot(domega_out_dy)) * m - domega_out_dy; - - /* disabled for now - gives texture filtering problems */ -#if 0 - // Since there is some blur to this reflection, make the - // derivatives a bit bigger. In theory this varies with the - // roughness but the exact relationship is complex and - // requires more ops than are practical. - domega_in_dx *= 10; - domega_in_dy *= 10; -#endif - } - } - } - else { - // CAUTION: the i and o variables are inverted relative to the paper - // eq. 39 - compute actual refractive direction - Vec3 R, dRdx, dRdy; - Vec3 T, dTdx, dTdy; - bool inside; - fresnel_dielectric(m_eta, m, omega_out, domega_out_dx, domega_out_dy, - R, dRdx, dRdy, - T, dTdx, dTdy, - inside); - if (!inside) { - omega_in = T; - domega_in_dx = dTdx; - domega_in_dy = dTdy; - // eq. 33 - float cosThetaM2 = cosThetaM * cosThetaM; - float tanThetaM2 = tanThetaM * tanThetaM; - float cosThetaM4 = cosThetaM2 * cosThetaM2; - float D = expf(-tanThetaM2 / alpha2) / (float(M_PI) * alpha2 * cosThetaM4); - // eq. 24 - float pm = D * cosThetaM; - // eval BRDF*cosNI - float cosNI = m_N.dot(omega_in); - // eq. 26, 27: now calculate G1(i,m) and G1(o,m) - float ao = 1 / (m_ab * sqrtf((1 - cosNO * cosNO) / (cosNO * cosNO))); - float ai = 1 / (m_ab * sqrtf((1 - cosNI * cosNI) / (cosNI * cosNI))); - float G1o = ao < 1.6f ? (3.535f * ao + 2.181f * ao * ao) / (1 + 2.276f * ao + 2.577f * ao * ao) : 1.0f; - float G1i = ai < 1.6f ? (3.535f * ai + 2.181f * ai * ai) / (1 + 2.276f * ai + 2.577f * ai * ai) : 1.0f; - float G = G1o * G1i; - // eq. 21 - float cosHI = m.dot(omega_in); - float cosHO = m.dot(omega_out); - float Ht2 = m_eta * cosHI + cosHO; - Ht2 *= Ht2; - float out = (fabsf(cosHI * cosHO) * (m_eta * m_eta) * (G * D)) / (cosNO * Ht2); - // eq. 38 and eq. 17 - pdf = pm * (m_eta * m_eta) * fabsf(cosHI) / Ht2; - eval.setValue(out, out, out); - - /* disabled for now - gives texture filtering problems */ -#if 0 - // Since there is some blur to this refraction, make the - // derivatives a bit bigger. In theory this varies with the - // roughness but the exact relationship is complex and - // requires more ops than are practical. - domega_in_dx *= 10; - domega_in_dy *= 10; -#endif - } - } - } - return Refractive ? Labels::TRANSMIT : Labels::REFLECT; - } -}; - - - -ClosureParam *bsdf_microfacet_ggx_params() -{ - static ClosureParam params[] = { - CLOSURE_VECTOR_PARAM(MicrofacetGGXClosure<0>, m_N), - CLOSURE_FLOAT_PARAM(MicrofacetGGXClosure<0>, m_ag), - CLOSURE_STRING_KEYPARAM("label"), - CLOSURE_FINISH_PARAM(MicrofacetGGXClosure<0>) - }; - return params; -} - -ClosureParam *bsdf_microfacet_ggx_refraction_params() -{ - static ClosureParam params[] = { - CLOSURE_VECTOR_PARAM(MicrofacetGGXClosure<1>, m_N), - CLOSURE_FLOAT_PARAM(MicrofacetGGXClosure<1>, m_ag), - CLOSURE_FLOAT_PARAM(MicrofacetGGXClosure<1>, m_eta), - CLOSURE_STRING_KEYPARAM("label"), - CLOSURE_FINISH_PARAM(MicrofacetGGXClosure<1>) - }; - return params; -} - -ClosureParam *bsdf_microfacet_beckmann_params() -{ - static ClosureParam params[] = { - CLOSURE_VECTOR_PARAM(MicrofacetBeckmannClosure<0>, m_N), - CLOSURE_FLOAT_PARAM(MicrofacetBeckmannClosure<0>, m_ab), - CLOSURE_STRING_KEYPARAM("label"), - CLOSURE_FINISH_PARAM(MicrofacetBeckmannClosure<0>) - }; - return params; -} - -ClosureParam *bsdf_microfacet_beckmann_refraction_params() -{ - static ClosureParam params[] = { - CLOSURE_VECTOR_PARAM(MicrofacetBeckmannClosure<1>, m_N), - CLOSURE_FLOAT_PARAM(MicrofacetBeckmannClosure<1>, m_ab), - CLOSURE_FLOAT_PARAM(MicrofacetBeckmannClosure<1>, m_eta), - CLOSURE_STRING_KEYPARAM("label"), - CLOSURE_FINISH_PARAM(MicrofacetBeckmannClosure<1>) - }; - return params; -} - -CLOSURE_PREPARE(bsdf_microfacet_ggx_prepare, MicrofacetGGXClosure<0>) -CLOSURE_PREPARE(bsdf_microfacet_ggx_refraction_prepare, MicrofacetGGXClosure<1>) -CLOSURE_PREPARE(bsdf_microfacet_beckmann_prepare, MicrofacetBeckmannClosure<0>) -CLOSURE_PREPARE(bsdf_microfacet_beckmann_refraction_prepare, MicrofacetBeckmannClosure<1>) - -CCL_NAMESPACE_END - |