ELF>@@ #line 2 "materialdefs_funcs_glass.cl" /*************************************************************************** * Copyright 1998-2013 by authors (see AUTHORS.txt) * * * * This file is part of LuxRender. * * * * Licensed under the Apache License, Version 2.0 (the "License"); * * you may not use this file except in compliance with the License. * * You may obtain a copy of the License at * * * * http://www.apache.org/licenses/LICENSE-2.0 * * * * Unless required by applicable law or agreed to in writing, software * * distributed under the License is distributed on an "AS IS" BASIS, * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* * See the License for the specific language governing permissions and * * limitations under the License. * ***************************************************************************/ //------------------------------------------------------------------------------ // Glass material //------------------------------------------------------------------------------ #if defined (PARAM_ENABLE_MAT_GLASS) float3 GlassMaterial_Sample(__global Material *material, __global HitPoint *hitPoint, const float3 localFixedDir, float3 *localSampledDir, const float u0, const float u1, const float passThroughEvent, float *pdfW, float *absCosSampledDir, BSDFEvent *event, const BSDFEvent requestedEvent TEXTURES_PARAM_DECL) { if (!(requestedEvent & SPECULAR)) return BLACK; const float3 kt = Spectrum_Clamp(Texture_GetSpectrumValue(&texs[material->glass.ktTexIndex], hitPoint TEXTURES_PARAM)); const float3 kr = Spectrum_Clamp(Texture_GetSpectrumValue(&texs[material->glass.krTexIndex], hitPoint TEXTURES_PARAM)); const bool isKtBlack = Spectrum_IsBlack(kt); const bool isKrBlack = Spectrum_IsBlack(kr); if (isKtBlack && isKrBlack) return BLACK; const bool entering = (CosTheta(localFixedDir) > 0.f); const float nc = Texture_GetFloatValue(&texs[material->glass.exteriorIorTexIndex], hitPoint TEXTURES_PARAM); const float nt = Texture_GetFloatValue(&texs[material->glass.interiorIorTexIndex], hitPoint TEXTURES_PARAM); const float ntc = nt / nc; const float eta = entering ? (nc / nt) : ntc; const float costheta = CosTheta(localFixedDir); // Decide to transmit or reflect float threshold; if ((requestedEvent & REFLECT) && !isKrBlack) { if ((requestedEvent & TRANSMIT) && !isKtBlack) threshold = .5f; else threshold = 0.f; } else { if ((requestedEvent & TRANSMIT) && !isKtBlack) threshold = 1.f; else return BLACK; } float3 result; if (passThroughEvent < threshold) { // Transmit // Compute transmitted ray direction const float sini2 = SinTheta2(localFixedDir); const float eta2 = eta * eta; const float sint2 = eta2 * sini2; // Handle total internal reflection for transmission if (sint2 >= 1.f) return BLACK; const float cost = sqrt(fmax(0.f, 1.f - sint2)) * (entering ? -1.f : 1.f); *localSampledDir = (float3)(-eta * localFixedDir.x, -eta * localFixedDir.y, cost); *absCosSampledDir = fabs(CosTheta(*localSampledDir)); *event = SPECULAR | TRANSMIT; *pdfW = threshold; //if (!hitPoint.fromLight) result = (1.f - FresnelCauchy_Evaluate(ntc, cost)) * eta2; //else // result = (1.f - FresnelCauchy_Evaluate(ntc, costheta)); result *= kt; } else { // Reflect *localSampledDir = (float3)(-localFixedDir.x, -localFixedDir.y, localFixedDir.z); *absCosSampledDir = fabs(CosTheta(*localSampledDir)); *event = SPECULAR | REFLECT; *pdfW = 1.f - threshold; result = kr * FresnelCauchy_Evaluate(ntc, costheta); } return result / *pdfW; } #endif SH5HHHT$HH=HHH[GCC: (GNU) 4.7.1zRx <AK nA.symtab.strtab.shstrtab.text.data.bss.rodata.str1.8.rela.text.startup.rela.ctors.comment.note.GNU-stack.rela.eh_frame@!@'@,2@@`< ;(SNZ0cx8s   H%<  X ]smaterialdefs_funcs_glass_kernel.cpp_GLOBAL__sub_I_materialdefs_funcs_glass_kernel.cpp.LC0_GLOBAL_OFFSET_TABLE__ZN3slg3ocl37KernelSource_materialdefs_funcs_glassE_ZNSsC1EPKcRKSaIcE_ZNSsD1Ev__dso_handle__cxa_atexit  # -2