summaryrefslogtreecommitdiff
path: root/indra/llrender
diff options
context:
space:
mode:
Diffstat (limited to 'indra/llrender')
-rw-r--r--indra/llrender/CMakeLists.txt7
-rw-r--r--indra/llrender/llatmosphere.cpp218
-rw-r--r--indra/llrender/llatmosphere.h72
-rw-r--r--indra/llrender/llgltexture.h2
4 files changed, 296 insertions, 3 deletions
diff --git a/indra/llrender/CMakeLists.txt b/indra/llrender/CMakeLists.txt
index 89451a072c..dcfbd71dec 100644
--- a/indra/llrender/CMakeLists.txt
+++ b/indra/llrender/CMakeLists.txt
@@ -107,7 +107,9 @@ if (BUILD_HEADLESS)
${LLXML_LIBRARIES}
${LLVFS_LIBRARIES}
${LLWINDOW_HEADLESS_LIBRARIES}
- ${OPENGL_HEADLESS_LIBRARIES})
+ ${LIBATMOSPHERE_LIBRARIES}
+ ${OPENGL_HEADLESS_LIBRARIES}
+ )
endif (BUILD_HEADLESS)
@@ -130,6 +132,7 @@ target_link_libraries(llrender
${LLVFS_LIBRARIES}
${LLWINDOW_LIBRARIES}
${FREETYPE_LIBRARIES}
+ ${LIBATMOSPHERE_LIBRARIES}
${OPENGL_LIBRARIES}
- ${ATMOSPHERE_LIBRARIES})
+ )
diff --git a/indra/llrender/llatmosphere.cpp b/indra/llrender/llatmosphere.cpp
new file mode 100644
index 0000000000..fb159a3e47
--- /dev/null
+++ b/indra/llrender/llatmosphere.cpp
@@ -0,0 +1,218 @@
+/**
+ * @file llatmosphere.cpp
+ * @brief LLAtmosphere integration impl
+ *
+ * $LicenseInfo:firstyear=2018&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2018, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llatmosphere.h"
+#include "llfasttimer.h"
+#include "llsys.h"
+#include "llglheaders.h"
+#include "llrender.h"
+#include "llshadermgr.h"
+#include "llglslshader.h"
+
+LLAtmosphere* gAtmosphere = nullptr;
+
+void LLAtmosphere::initClass()
+{
+ if (!gAtmosphere)
+ {
+ gAtmosphere = new LLAtmosphere;
+ }
+}
+
+void LLAtmosphere::cleanupClass()
+{
+ if(gAtmosphere)
+ {
+ delete gAtmosphere;
+ }
+ gAtmosphere = NULL;
+}
+
+LLAtmosphere::LLAtmosphere()
+{
+ // Init libatmosphere model
+ m_config.num_scattering_orders = 4;
+
+ // Values from "Reference Solar Spectral Irradiance: ASTM G-173", ETR column
+ // (see http://rredc.nrel.gov/solar/spectra/am1.5/ASTMG173/ASTMG173.html),
+ // summed and averaged in each bin (e.g. the value for 360nm is the average
+ // of the ASTM G-173 values for all wavelengths between 360 and 370nm).
+ // Values in W.m^-2.
+ const int kLambdaMin = 360;
+ const int kLambdaMax = 830;
+ const double kSolarIrradiance[48] = {
+ 1.11776, 1.14259, 1.01249, 1.14716, 1.72765, 1.73054, 1.6887, 1.61253,
+ 1.91198, 2.03474, 2.02042, 2.02212, 1.93377, 1.95809, 1.91686, 1.8298,
+ 1.8685, 1.8931, 1.85149, 1.8504, 1.8341, 1.8345, 1.8147, 1.78158, 1.7533,
+ 1.6965, 1.68194, 1.64654, 1.6048, 1.52143, 1.55622, 1.5113, 1.474, 1.4482,
+ 1.41018, 1.36775, 1.34188, 1.31429, 1.28303, 1.26758, 1.2367, 1.2082,
+ 1.18737, 1.14683, 1.12362, 1.1058, 1.07124, 1.04992
+ };
+
+ // Values from http://www.iup.uni-bremen.de/gruppen/molspec/databases/
+ // referencespectra/o3spectra2011/index.html for 233K, summed and averaged in
+ // each bin (e.g. the value for 360nm is the average of the original values
+ // for all wavelengths between 360 and 370nm). Values in m^2.
+ const double kOzoneCrossSection[48] = {
+ 1.18e-27, 2.182e-28, 2.818e-28, 6.636e-28, 1.527e-27, 2.763e-27, 5.52e-27,
+ 8.451e-27, 1.582e-26, 2.316e-26, 3.669e-26, 4.924e-26, 7.752e-26, 9.016e-26,
+ 1.48e-25, 1.602e-25, 2.139e-25, 2.755e-25, 3.091e-25, 3.5e-25, 4.266e-25,
+ 4.672e-25, 4.398e-25, 4.701e-25, 5.019e-25, 4.305e-25, 3.74e-25, 3.215e-25,
+ 2.662e-25, 2.238e-25, 1.852e-25, 1.473e-25, 1.209e-25, 9.423e-26, 7.455e-26,
+ 6.566e-26, 5.105e-26, 4.15e-26, 4.228e-26, 3.237e-26, 2.451e-26, 2.801e-26,
+ 2.534e-26, 1.624e-26, 1.465e-26, 2.078e-26, 1.383e-26, 7.105e-27
+ };
+
+ // From https://en.wikipedia.org/wiki/Dobson_unit, in molecules.m^-2.
+ const double kDobsonUnit = 2.687e20;
+
+ // Maximum number density of ozone molecules, in m^-3 (computed so at to get
+ // 300 Dobson units of ozone - for this we divide 300 DU by the integral of
+ // the ozone density profile defined below, which is equal to 15km).
+ const double kMaxOzoneNumberDensity = 300.0 * kDobsonUnit / 15000.0;
+
+ const double kSunAngularRadius = 0.00935 / 2.0;
+ const double kBottomRadius = 6360000.0;
+ const double kTopRadius = 6420000.0;
+ const double kRayleigh = 1.24062e-6;
+ const double kRayleighScaleHeight = 8000.0;
+ const double kMieScaleHeight = 1200.0;
+ const double kMieAngstromAlpha = 0.0;
+ const double kMieAngstromBeta = 5.328e-3;
+ const double kMieSingleScatteringAlbedo = 0.9;
+ const double kMiePhaseFunctionG = 0.8;
+ const double max_sun_zenith_angle = F_PI * 2.0 / 3.0;
+
+ atmosphere::DensityProfileLayer rayleigh_density(0.0, 1.0, -1.0 / kRayleighScaleHeight, 0.0, 0.0);
+ atmosphere::DensityProfileLayer mie_density(0.0, 1.0, -1.0 / kMieScaleHeight, 0.0, 0.0);
+
+ // Density profile increasing linearly from 0 to 1 between 10 and 25km, and
+ // decreasing linearly from 1 to 0 between 25 and 40km. This is an approximate
+ // profile from http://www.kln.ac.lk/science/Chemistry/Teaching_Resources/
+ // Documents/Introduction%20to%20atmospheric%20chemistry.pdf (page 10).
+ std::vector<atmosphere::DensityProfileLayer> ozone_density;
+ ozone_density.push_back(atmosphere::DensityProfileLayer(25000.0, 0.0, 0.0, 1.0 / 15000.0, -2.0 / 3.0));
+ ozone_density.push_back(atmosphere::DensityProfileLayer(0.0, 0.0, 0.0, -1.0 / 15000.0, 8.0 / 3.0));
+
+ std::vector<double> wavelengths;
+ std::vector<double> solar_irradiance;
+ std::vector<double> rayleigh_scattering;
+ std::vector<double> mie_scattering;
+ std::vector<double> mie_extinction;
+ std::vector<double> absorption_extinction;
+ std::vector<double> ground_albedo;
+
+ for (int l = kLambdaMin; l <= kLambdaMax; l += 10)
+ {
+ double lambda = static_cast<double>(l) * 1e-3; // micro-meters
+ double mie = kMieAngstromBeta / kMieScaleHeight * pow(lambda, -kMieAngstromAlpha);
+ wavelengths.push_back(l);
+ solar_irradiance.push_back(kSolarIrradiance[(l - kLambdaMin) / 10]);
+ rayleigh_scattering.push_back(kRayleigh * pow(lambda, -4));
+ mie_scattering.push_back(mie * kMieSingleScatteringAlbedo);
+ mie_extinction.push_back(mie);
+ absorption_extinction.push_back(kMaxOzoneNumberDensity * kOzoneCrossSection[(l - kLambdaMin) / 10]);
+ ground_albedo.push_back(0.1f);
+ }
+
+ m_model = new atmosphere::Model(
+ wavelengths,
+ solar_irradiance,
+ kSunAngularRadius,
+ kBottomRadius,
+ kTopRadius,
+ {rayleigh_density},
+ rayleigh_scattering,
+ {mie_density},
+ mie_scattering,
+ mie_extinction,
+ kMiePhaseFunctionG,
+ ozone_density,
+ absorption_extinction,
+ ground_albedo,
+ max_sun_zenith_angle,
+ 1000.0,
+ 15,
+ false,
+ true);
+
+ m_model->Init(m_config, m_textures);
+
+ m_transmittance = new LLGLTexture;
+ m_scattering = new LLGLTexture;
+ m_mie_scattering = new LLGLTexture;
+
+ m_transmittance->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+ m_transmittance->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+ m_transmittance->setExplicitFormat(GL_RGB16F, GL_RGB, GL_FLOAT);
+ m_transmittance->setTexName(m_textures.transmittance_texture);
+ m_transmittance->setTarget(GL_TEXTURE_2D, LLTexUnit::TT_TEXTURE);
+
+ m_scattering->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+ m_scattering->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+ m_scattering->setExplicitFormat(GL_RGB16F, GL_RGB, GL_FLOAT);
+ m_scattering->setTexName(m_textures.transmittance_texture);
+ m_scattering->setTarget(GL_TEXTURE_3D, LLTexUnit::TT_TEXTURE_3D);
+
+ m_mie_scattering->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+ m_mie_scattering->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+ m_mie_scattering->setExplicitFormat(GL_RGB16F, GL_RGB, GL_FLOAT);
+ m_mie_scattering->setTexName(m_textures.transmittance_texture);
+ m_mie_scattering->setTarget(GL_TEXTURE_3D, LLTexUnit::TT_TEXTURE_3D);
+};
+
+LLAtmosphere::~LLAtmosphere()
+{
+ // Cease referencing textures from atmosphere::model from our LLGLTextures wrappers for same.
+ m_transmittance->setTexName(0);
+ m_scattering->setTexName(0);
+ m_mie_scattering->setTexName(0);
+
+ delete m_model;
+ m_model = nullptr;
+}
+
+LLGLTexture* LLAtmosphere::getTransmittance() const
+{
+ return m_transmittance;
+}
+
+LLGLTexture* LLAtmosphere::getScattering() const
+{
+ return m_scattering;
+}
+
+LLGLTexture* LLAtmosphere::getMieScattering() const
+{
+ return m_mie_scattering;
+}
+
+GLuint LLAtmosphere::getAtmosphericShaderForLink() const
+{
+ return m_model ? m_model->GetShader() : 0;
+}
diff --git a/indra/llrender/llatmosphere.h b/indra/llrender/llatmosphere.h
new file mode 100644
index 0000000000..4aa36be27f
--- /dev/null
+++ b/indra/llrender/llatmosphere.h
@@ -0,0 +1,72 @@
+/**
+ * @file llatmosphere.h
+ * @brief LLAtmosphere class for integration with libatmosphere
+ *
+ * $LicenseInfo:firstyear=2018&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2018, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_ATMOSPHERE_H
+#define LL_ATMOSPHERE_H
+
+#include "llglheaders.h"
+#include "llgltexture.h"
+#include "libatmosphere/model.h"
+
+class LLAtmosphere
+{
+public:
+ LLAtmosphere();
+ ~LLAtmosphere();
+
+ static void initClass();
+ static void cleanupClass();
+
+ const LLAtmosphere& operator=(const LLAtmosphere& rhs)
+ {
+ LL_ERRS() << "Illegal operation!" << LL_ENDL;
+ return *this;
+ }
+
+ LLGLTexture* getTransmittance() const;
+ LLGLTexture* getScattering() const;
+ LLGLTexture* getMieScattering() const;
+
+ GLuint getAtmosphericShaderForLink() const;
+
+protected:
+ LLAtmosphere(const LLAtmosphere& rhs)
+ {
+ *this = rhs;
+ }
+
+ atmosphere::ModelConfig m_config;
+ atmosphere::PrecomputedTextures m_textures;
+ atmosphere::Model* m_model = nullptr;
+
+ LLPointer<LLGLTexture> m_transmittance;
+ LLPointer<LLGLTexture> m_scattering;
+ LLPointer<LLGLTexture> m_mie_scattering;
+};
+
+extern LLAtmosphere* gAtmosphere;
+
+#endif // LL_ATMOSPHERE_H
diff --git a/indra/llrender/llgltexture.h b/indra/llrender/llgltexture.h
index a57e48ffad..b8d646ed15 100644
--- a/indra/llrender/llgltexture.h
+++ b/indra/llrender/llgltexture.h
@@ -133,7 +133,7 @@ public:
void setGLTextureCreated (bool initialized);
void setCategory(S32 category) ;
void setTexName(LLGLuint); // for forcing w/ externally created textures only
- void setTarget(const LLGLenum target, const LLTexUnit::eTextureType bind_target);
+ void setTarget(const LLGLenum target, const LLTexUnit::eTextureType bind_target);
LLTexUnit::eTextureAddressMode getAddressMode(void) const ;
S32 getMaxDiscardLevel() const;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 04:13:42 +0000