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Merge pull request #5143 from ZappoMan/atmosphereBatchFix

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Change atmospheres to render using batch compatible pipeline and shaders
This commit is contained in:
Clément Brisset 2015-06-17 19:48:11 +02:00
commit d67d350e72
12 changed files with 187 additions and 134 deletions
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14
interface/src/Application.cpp
View file

@ -3260,6 +3260,9 @@ namespace render {
template <> const Item::Bound payloadGetBound(const BackgroundRenderData::Pointer& stuff) { return Item::Bound(); }
template <> void payloadRender(const BackgroundRenderData::Pointer& background, RenderArgs* args) {
Q_ASSERT(args->_batch);
gpu::Batch& batch = *args->_batch;
// Background rendering decision
auto skyStage = DependencyManager::get<SceneScriptingInterface>()->getSkyStage();
auto skybox = model::SkyboxPointer();
@ -3327,7 +3330,8 @@ namespace render {
PerformanceTimer perfTimer("atmosphere");
PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),
"Application::displaySide() ... atmosphere...");
background->_environment->renderAtmospheres(*(args->_viewFrustum));
background->_environment->renderAtmospheres(batch, *(args->_viewFrustum));
}
}
@ -3336,13 +3340,13 @@ namespace render {
skybox = skyStage->getSkybox();
if (skybox) {
gpu::Batch batch;
model::Skybox::render(batch, *(Application::getInstance()->getDisplayViewFrustum()), *skybox);
gpu::GLBackend::renderBatch(batch, true);
glUseProgram(0);
}
}
// FIX ME - If I don't call this renderBatch() here, then the atmosphere and skybox don't render, but it
// seems like these payloadRender() methods shouldn't be doing this. We need to investigate why the engine
// isn't rendering our batch
gpu::GLBackend::renderBatch(batch, true);
}
}

4
libraries/gpu/src/gpu/Batch.h
View file

@ -150,6 +150,8 @@ public:
void _glUseProgram(GLuint program);
void _glUniform1f(GLint location, GLfloat v0);
void _glUniform2f(GLint location, GLfloat v0, GLfloat v1);
void _glUniform3f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
void _glUniform3fv(GLint location, GLsizei count, const GLfloat* value);
void _glUniform4fv(GLint location, GLsizei count, const GLfloat* value);
void _glUniformMatrix4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
@ -210,6 +212,8 @@ public:
COMMAND_glUseProgram,
COMMAND_glUniform1f,
COMMAND_glUniform2f,
COMMAND_glUniform3f,
COMMAND_glUniform3fv,
COMMAND_glUniform4fv,
COMMAND_glUniformMatrix4fv,

53
libraries/gpu/src/gpu/GLBackend.cpp
View file

@ -61,6 +61,8 @@ GLBackend::CommandCall GLBackend::_commandCalls[Batch::NUM_COMMANDS] =
(&::gpu::GLBackend::do_glUseProgram),
(&::gpu::GLBackend::do_glUniform1f),
(&::gpu::GLBackend::do_glUniform2f),
(&::gpu::GLBackend::do_glUniform3f),
(&::gpu::GLBackend::do_glUniform3fv),
(&::gpu::GLBackend::do_glUniform4fv),
(&::gpu::GLBackend::do_glUniformMatrix4fv),
@ -462,6 +464,7 @@ void Batch::_glUniform2f(GLint location, GLfloat v0, GLfloat v1) {
DO_IT_NOW(_glUniform2f, 1);
}
void GLBackend::do_glUniform2f(Batch& batch, uint32 paramOffset) {
if (_pipeline._program == 0) {
// We should call updatePipeline() to bind the program but we are not doing that
@ -475,6 +478,56 @@ void GLBackend::do_glUniform2f(Batch& batch, uint32 paramOffset) {
(void) CHECK_GL_ERROR();
}
void Batch::_glUniform3f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2) {
ADD_COMMAND_GL(glUniform3f);
_params.push_back(v2);
_params.push_back(v1);
_params.push_back(v0);
_params.push_back(location);
DO_IT_NOW(_glUniform3f, 1);
}
void GLBackend::do_glUniform3f(Batch& batch, uint32 paramOffset) {
if (_pipeline._program == 0) {
// We should call updatePipeline() to bind the program but we are not doing that
// because these uniform setters are deprecated and we don;t want to create side effect
return;
}
glUniform3f(
batch._params[paramOffset + 3]._int,
batch._params[paramOffset + 2]._float,
batch._params[paramOffset + 1]._float,
batch._params[paramOffset + 0]._float);
(void) CHECK_GL_ERROR();
}
void Batch::_glUniform3fv(GLint location, GLsizei count, const GLfloat* value) {
ADD_COMMAND_GL(glUniform3fv);
const int VEC3_SIZE = 3 * sizeof(float);
_params.push_back(cacheData(count * VEC3_SIZE, value));
_params.push_back(count);
_params.push_back(location);
DO_IT_NOW(_glUniform3fv, 3);
}
void GLBackend::do_glUniform3fv(Batch& batch, uint32 paramOffset) {
if (_pipeline._program == 0) {
// We should call updatePipeline() to bind the program but we are not doing that
// because these uniform setters are deprecated and we don;t want to create side effect
return;
}
glUniform3fv(
batch._params[paramOffset + 2]._int,
batch._params[paramOffset + 1]._uint,
(const GLfloat*)batch.editData(batch._params[paramOffset + 0]._uint));
(void) CHECK_GL_ERROR();
}
void Batch::_glUniform4fv(GLint location, GLsizei count, const GLfloat* value) {
ADD_COMMAND_GL(glUniform4fv);

2
libraries/gpu/src/gpu/GLBackend.h
View file

@ -379,6 +379,8 @@ protected:
void do_glUseProgram(Batch& batch, uint32 paramOffset);
void do_glUniform1f(Batch& batch, uint32 paramOffset);
void do_glUniform2f(Batch& batch, uint32 paramOffset);
void do_glUniform3f(Batch& batch, uint32 paramOffset);
void do_glUniform3fv(Batch& batch, uint32 paramOffset);
void do_glUniform4fv(Batch& batch, uint32 paramOffset);
void do_glUniformMatrix4fv(Batch& batch, uint32 paramOffset);

20
libraries/model/src/model/Stage.cpp
View file

@ -14,9 +14,6 @@
#include <math.h>
#include <qcompilerdetection.h>
#include "SkyFromAtmosphere_vert.h"
#include "SkyFromAtmosphere_frag.h"
using namespace model;
@ -207,17 +204,6 @@ SunSkyStage::SunSkyStage() :
// Begining of march
setYearTime(60.0f);
auto skyFromAtmosphereVertex = gpu::ShaderPointer(gpu::Shader::createVertex(std::string(SkyFromAtmosphere_vert)));
auto skyFromAtmosphereFragment = gpu::ShaderPointer(gpu::Shader::createPixel(std::string(SkyFromAtmosphere_frag)));
auto skyShader = gpu::ShaderPointer(gpu::Shader::createProgram(skyFromAtmosphereVertex, skyFromAtmosphereFragment));
auto skyState = gpu::StatePointer(new gpu::State());
// skyState->setStencilEnable(false);
// skyState->setBlendEnable(false);
_skyPipeline = gpu::PipelinePointer(gpu::Pipeline::create(skyShader, skyState));
_skybox.reset(new Skybox());
_skybox->setColor(Color(1.0f, 0.0f, 0.0f));
@ -306,12 +292,6 @@ void SunSkyStage::updateGraphicsObject() const {
case NUM_BACKGROUND_MODES:
Q_UNREACHABLE();
};
static int firstTime = 0;
if (firstTime == 0) {
firstTime++;
gpu::Shader::makeProgram(*(_skyPipeline->getProgram()));
}
}
void SunSkyStage::setBackgroundMode(BackgroundMode mode) {

2
libraries/model/src/model/Stage.h
View file

@ -229,8 +229,6 @@ protected:
AtmospherePointer _atmosphere;
mutable SkyboxPointer _skybox;
gpu::PipelinePointer _skyPipeline;
float _dayTime = 12.0f;
int _yearTime = 0;
mutable EarthSunModel _earthSunModel;

157
interface/src/Environment.cpp → libraries/render-utils/src/Environment.cpp
View file

@ -9,25 +9,25 @@
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
#include "InterfaceConfig.h"
#include <QByteArray>
#include <QMutexLocker>
#include <QtDebug>
#include "GeometryCache.h"
#include <GeometryUtil.h>
#include <NumericalConstants.h>
#include <OctreePacketData.h>
#include <PacketHeaders.h>
#include <PathUtils.h>
#include <ProgramObject.h>
#include <SharedUtil.h>
#include "Application.h"
#include "Camera.h"
#include "world.h"
#include "InterfaceLogging.h"
#include "Environment.h"
#include "SkyFromSpace_vert.h"
#include "SkyFromSpace_frag.h"
#include "SkyFromAtmosphere_vert.h"
#include "SkyFromAtmosphere_frag.h"
uint qHash(const HifiSockAddr& sockAddr) {
if (sockAddr.getAddress().isNull()) {
return 0; // shouldn't happen, but if it does, zero is a perfectly valid hash
@ -42,20 +42,15 @@ Environment::Environment()
}
Environment::~Environment() {
if (_initialized) {
delete _skyFromAtmosphereProgram;
delete _skyFromSpaceProgram;
}
}
void Environment::init() {
if (_initialized) {
qCDebug(interfaceapp, "[ERROR] Environment is already initialized.");
return;
}
_skyFromAtmosphereProgram = createSkyProgram("Atmosphere", _skyFromAtmosphereUniformLocations);
_skyFromSpaceProgram = createSkyProgram("Space", _skyFromSpaceUniformLocations);
setupAtmosphereProgram(SkyFromSpace_vert, SkyFromSpace_frag, _skyFromSpaceProgram, _skyFromSpaceUniformLocations);
setupAtmosphereProgram(SkyFromAtmosphere_vert, SkyFromAtmosphere_frag, _skyFromAtmosphereProgram, _skyFromAtmosphereUniformLocations);
// start off with a default-constructed environment data
_data[HifiSockAddr()][0];
@ -63,22 +58,60 @@ void Environment::init() {
_initialized = true;
}
void Environment::setupAtmosphereProgram(const char* vertSource, const char* fragSource, gpu::PipelinePointer& pipeline, int* locations) {
auto VS = gpu::ShaderPointer(gpu::Shader::createVertex(std::string(vertSource)));
auto PS = gpu::ShaderPointer(gpu::Shader::createPixel(std::string(fragSource)));
gpu::ShaderPointer program = gpu::ShaderPointer(gpu::Shader::createProgram(VS, PS));
gpu::Shader::BindingSet slotBindings;
gpu::Shader::makeProgram(*program, slotBindings);
gpu::StatePointer state = gpu::StatePointer(new gpu::State());
state->setCullMode(gpu::State::CULL_NONE);
state->setDepthTest(false);
state->setBlendFunction(true,
gpu::State::SRC_ALPHA, gpu::State::BLEND_OP_ADD, gpu::State::INV_SRC_ALPHA,
gpu::State::FACTOR_ALPHA, gpu::State::BLEND_OP_ADD, gpu::State::ONE);
pipeline = gpu::PipelinePointer(gpu::Pipeline::create(program, state));
locations[CAMERA_POS_LOCATION] = program->getUniforms().findLocation("v3CameraPos");
locations[LIGHT_POS_LOCATION] = program->getUniforms().findLocation("v3LightPos");
locations[INV_WAVELENGTH_LOCATION] = program->getUniforms().findLocation("v3InvWavelength");
locations[CAMERA_HEIGHT2_LOCATION] = program->getUniforms().findLocation("fCameraHeight2");
locations[OUTER_RADIUS_LOCATION] = program->getUniforms().findLocation("fOuterRadius");
locations[OUTER_RADIUS2_LOCATION] = program->getUniforms().findLocation("fOuterRadius2");
locations[INNER_RADIUS_LOCATION] = program->getUniforms().findLocation("fInnerRadius");
locations[KR_ESUN_LOCATION] = program->getUniforms().findLocation("fKrESun");
locations[KM_ESUN_LOCATION] = program->getUniforms().findLocation("fKmESun");
locations[KR_4PI_LOCATION] = program->getUniforms().findLocation("fKr4PI");
locations[KM_4PI_LOCATION] = program->getUniforms().findLocation("fKm4PI");
locations[SCALE_LOCATION] = program->getUniforms().findLocation("fScale");
locations[SCALE_DEPTH_LOCATION] = program->getUniforms().findLocation("fScaleDepth");
locations[SCALE_OVER_SCALE_DEPTH_LOCATION] = program->getUniforms().findLocation("fScaleOverScaleDepth");
locations[G_LOCATION] = program->getUniforms().findLocation("g");
locations[G2_LOCATION] = program->getUniforms().findLocation("g2");
}
void Environment::resetToDefault() {
_data.clear();
_data[HifiSockAddr()][0];
}
void Environment::renderAtmospheres(ViewFrustum& camera) {
void Environment::renderAtmospheres(gpu::Batch& batch, ViewFrustum& camera) {
// get the lock for the duration of the call
QMutexLocker locker(&_mutex);
if (_environmentIsOverridden) {
renderAtmosphere(camera, _overrideData);
renderAtmosphere(batch, camera, _overrideData);
} else {
foreach (const ServerData& serverData, _data) {
// TODO: do something about EnvironmentData
foreach (const EnvironmentData& environmentData, serverData) {
renderAtmosphere(camera, environmentData);
renderAtmosphere(batch, camera, environmentData);
}
}
}
@ -201,87 +234,51 @@ int Environment::parseData(const HifiSockAddr& senderAddress, const QByteArray&
return bytesRead;
}
ProgramObject* Environment::createSkyProgram(const char* from, int* locations) {
ProgramObject* program = new ProgramObject();
QByteArray prefix = QString(PathUtils::resourcesPath() + "/shaders/SkyFrom" + from).toUtf8();
program->addShaderFromSourceFile(QGLShader::Vertex, prefix + ".vert");
program->addShaderFromSourceFile(QGLShader::Fragment, prefix + ".frag");
program->link();
locations[CAMERA_POS_LOCATION] = program->uniformLocation("v3CameraPos");
locations[LIGHT_POS_LOCATION] = program->uniformLocation("v3LightPos");
locations[INV_WAVELENGTH_LOCATION] = program->uniformLocation("v3InvWavelength");
locations[CAMERA_HEIGHT2_LOCATION] = program->uniformLocation("fCameraHeight2");
locations[OUTER_RADIUS_LOCATION] = program->uniformLocation("fOuterRadius");
locations[OUTER_RADIUS2_LOCATION] = program->uniformLocation("fOuterRadius2");
locations[INNER_RADIUS_LOCATION] = program->uniformLocation("fInnerRadius");
locations[KR_ESUN_LOCATION] = program->uniformLocation("fKrESun");
locations[KM_ESUN_LOCATION] = program->uniformLocation("fKmESun");
locations[KR_4PI_LOCATION] = program->uniformLocation("fKr4PI");
locations[KM_4PI_LOCATION] = program->uniformLocation("fKm4PI");
locations[SCALE_LOCATION] = program->uniformLocation("fScale");
locations[SCALE_DEPTH_LOCATION] = program->uniformLocation("fScaleDepth");
locations[SCALE_OVER_SCALE_DEPTH_LOCATION] = program->uniformLocation("fScaleOverScaleDepth");
locations[G_LOCATION] = program->uniformLocation("g");
locations[G2_LOCATION] = program->uniformLocation("g2");
return program;
}
void Environment::renderAtmosphere(gpu::Batch& batch, ViewFrustum& camera, const EnvironmentData& data) {
void Environment::renderAtmosphere(ViewFrustum& camera, const EnvironmentData& data) {
glm::vec3 center = data.getAtmosphereCenter();
glPushMatrix();
glTranslatef(center.x, center.y, center.z);
Transform transform;
transform.setTranslation(center);
batch.setModelTransform(transform);
glm::vec3 relativeCameraPos = camera.getPosition() - center;
float height = glm::length(relativeCameraPos);
// use the appropriate shader depending on whether we're inside or outside
ProgramObject* program;
int* locations;
if (height < data.getAtmosphereOuterRadius()) {
program = _skyFromAtmosphereProgram;
batch.setPipeline(_skyFromAtmosphereProgram);
locations = _skyFromAtmosphereUniformLocations;
} else {
program = _skyFromSpaceProgram;
batch.setPipeline(_skyFromSpaceProgram);
locations = _skyFromSpaceUniformLocations;
}
// the constants here are from Sean O'Neil's GPU Gems entry
// (http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter16.html), GameEngine.cpp
program->bind();
program->setUniform(locations[CAMERA_POS_LOCATION], relativeCameraPos);
batch._glUniform3f(locations[CAMERA_POS_LOCATION], relativeCameraPos.x, relativeCameraPos.y, relativeCameraPos.z);
glm::vec3 lightDirection = glm::normalize(data.getSunLocation());
program->setUniform(locations[LIGHT_POS_LOCATION], lightDirection);
program->setUniformValue(locations[INV_WAVELENGTH_LOCATION],
1 / powf(data.getScatteringWavelengths().r, 4.0f),
1 / powf(data.getScatteringWavelengths().g, 4.0f),
1 / powf(data.getScatteringWavelengths().b, 4.0f));
program->setUniformValue(locations[CAMERA_HEIGHT2_LOCATION], height * height);
program->setUniformValue(locations[OUTER_RADIUS_LOCATION], data.getAtmosphereOuterRadius());
program->setUniformValue(locations[OUTER_RADIUS2_LOCATION], data.getAtmosphereOuterRadius() * data.getAtmosphereOuterRadius());
program->setUniformValue(locations[INNER_RADIUS_LOCATION], data.getAtmosphereInnerRadius());
program->setUniformValue(locations[KR_ESUN_LOCATION], data.getRayleighScattering() * data.getSunBrightness());
program->setUniformValue(locations[KM_ESUN_LOCATION], data.getMieScattering() * data.getSunBrightness());
program->setUniformValue(locations[KR_4PI_LOCATION], data.getRayleighScattering() * 4.0f * PI);
program->setUniformValue(locations[KM_4PI_LOCATION], data.getMieScattering() * 4.0f * PI);
program->setUniformValue(locations[SCALE_LOCATION], 1.0f / (data.getAtmosphereOuterRadius() - data.getAtmosphereInnerRadius()));
program->setUniformValue(locations[SCALE_DEPTH_LOCATION], 0.25f);
program->setUniformValue(locations[SCALE_OVER_SCALE_DEPTH_LOCATION],
batch._glUniform3f(locations[LIGHT_POS_LOCATION], lightDirection.x, lightDirection.y, lightDirection.z);
batch._glUniform3f(locations[INV_WAVELENGTH_LOCATION],
1 / powf(data.getScatteringWavelengths().r, 4.0f),
1 / powf(data.getScatteringWavelengths().g, 4.0f),
1 / powf(data.getScatteringWavelengths().b, 4.0f));
batch._glUniform1f(locations[CAMERA_HEIGHT2_LOCATION], height * height);
batch._glUniform1f(locations[OUTER_RADIUS_LOCATION], data.getAtmosphereOuterRadius());
batch._glUniform1f(locations[OUTER_RADIUS2_LOCATION], data.getAtmosphereOuterRadius() * data.getAtmosphereOuterRadius());
batch._glUniform1f(locations[INNER_RADIUS_LOCATION], data.getAtmosphereInnerRadius());
batch._glUniform1f(locations[KR_ESUN_LOCATION], data.getRayleighScattering() * data.getSunBrightness());
batch._glUniform1f(locations[KM_ESUN_LOCATION], data.getMieScattering() * data.getSunBrightness());
batch._glUniform1f(locations[KR_4PI_LOCATION], data.getRayleighScattering() * 4.0f * PI);
batch._glUniform1f(locations[KM_4PI_LOCATION], data.getMieScattering() * 4.0f * PI);
batch._glUniform1f(locations[SCALE_LOCATION], 1.0f / (data.getAtmosphereOuterRadius() - data.getAtmosphereInnerRadius()));
batch._glUniform1f(locations[SCALE_DEPTH_LOCATION], 0.25f);
batch._glUniform1f(locations[SCALE_OVER_SCALE_DEPTH_LOCATION],
(1.0f / (data.getAtmosphereOuterRadius() - data.getAtmosphereInnerRadius())) / 0.25f);
program->setUniformValue(locations[G_LOCATION], -0.990f);
program->setUniformValue(locations[G2_LOCATION], -0.990f * -0.990f);
batch._glUniform1f(locations[G_LOCATION], -0.990f);
batch._glUniform1f(locations[G2_LOCATION], -0.990f * -0.990f);
glDepthMask(GL_FALSE);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glEnable(GL_BLEND);
DependencyManager::get<GeometryCache>()->renderSphere(1.0f, 100, 50, glm::vec4(1.0f, 1.0f, 1.0f, 1.0f)); //Draw a unit sphere
glDepthMask(GL_TRUE);
program->release();
glPopMatrix();
DependencyManager::get<GeometryCache>()->renderSphere(batch,1.0f, 100, 50, glm::vec4(1.0f, 0.0f, 0.0f, 0.5f)); //Draw a unit sphere
}

18
interface/src/Environment.h → libraries/render-utils/src/Environment.h
View file

@ -16,8 +16,9 @@
#include <QMutex>
#include <HifiSockAddr.h>
#include <gpu/Batch.h>
#include "EnvironmentData.h"
#include <EnvironmentData.h>
class ViewFrustum;
class ProgramObject;
@ -29,7 +30,7 @@ public:
void init();
void resetToDefault();
void renderAtmospheres(ViewFrustum& camera);
void renderAtmospheres(gpu::Batch& batch, ViewFrustum& camera);
void override(const EnvironmentData& overrideData) { _overrideData = overrideData; _environmentIsOverridden = true; }
void endOverride() { _environmentIsOverridden = false; }
@ -44,14 +45,10 @@ private:
bool findCapsulePenetration(const glm::vec3& start,
const glm::vec3& end, float radius, glm::vec3& penetration); // NOTE: Deprecated
ProgramObject* createSkyProgram(const char* from, int* locations);
void renderAtmosphere(ViewFrustum& camera, const EnvironmentData& data);
void renderAtmosphere(gpu::Batch& batch, ViewFrustum& camera, const EnvironmentData& data);
bool _initialized;
ProgramObject* _skyFromAtmosphereProgram;
ProgramObject* _skyFromSpaceProgram;
enum {
CAMERA_POS_LOCATION,
LIGHT_POS_LOCATION,
@ -72,6 +69,11 @@ private:
LOCATION_COUNT
};
void setupAtmosphereProgram(const char* vertSource, const char* fragSource, gpu::PipelinePointer& pipelineProgram, int* locations);
gpu::PipelinePointer _skyFromAtmosphereProgram;
gpu::PipelinePointer _skyFromSpaceProgram;
int _skyFromAtmosphereUniformLocations[LOCATION_COUNT];
int _skyFromSpaceUniformLocations[LOCATION_COUNT];

9
libraries/model/src/model/SkyFromAtmosphere.slf → libraries/render-utils/src/SkyFromAtmosphere.slf
View file

@ -53,12 +53,14 @@ uniform float g2;
varying vec3 position;
float scale(float fCos)
{
float x = 1.0 - fCos;
return fScaleDepth * exp(-0.00287 + x*(0.459 + x*(3.83 + x*(-6.80 + x*5.25))));
}
void main (void)
{
// Get the ray from the camera to the vertex, and its length (which is the far point of the ray passing through the atmosphere)
@ -102,7 +104,8 @@ void main (void)
float fCos = dot(v3LightPos, v3Direction) / length(v3Direction);
float fMiePhase = 1.5 * ((1.0 - g2) / (2.0 + g2)) * (1.0 + fCos*fCos) / pow(1.0 + g2 - 2.0*g*fCos, 1.5);
gl_FragColor.rgb = frontColor.rgb + fMiePhase * secondaryFrontColor.rgb;
gl_FragColor.a = gl_FragColor.b;
gl_FragColor.rgb = pow(gl_FragColor.rgb, vec3(1.0/2.2));
vec3 finalColor = frontColor.rgb + fMiePhase * secondaryFrontColor.rgb;
gl_FragColor.a = finalColor.b;
gl_FragColor.rgb = pow(finalColor.rgb, vec3(1.0/2.2));
}

16
libraries/model/src/model/SkyFromAtmosphere.slv → libraries/render-utils/src/SkyFromAtmosphere.slv
View file

@ -33,6 +33,9 @@
// Copyright (c) 2004 Sean O'Neil
//
<@include gpu/Transform.slh@>
<$declareStandardTransform()$>
uniform vec3 v3CameraPos; // The camera's current position
uniform vec3 v3LightPos; // The direction vector to the light source
uniform vec3 v3InvWavelength; // 1 / pow(wavelength, 4) for the red, green, and blue channels
@ -52,17 +55,14 @@ const float fSamples = 2.0;
varying vec3 position;
float scale(float fCos)
{
float x = 1.0 - fCos;
return fScaleDepth * exp(-0.00287 + x*(0.459 + x*(3.83 + x*(-6.80 + x*5.25))));
}
void main(void)
{
// Get the ray from the camera to the vertex, and its length (which is the far point of the ray passing through the atmosphere)
position = gl_Vertex.xyz * fOuterRadius;
gl_Position = gl_ModelViewProjectionMatrix * vec4(position, 1.0);
// standard transform
TransformCamera cam = getTransformCamera();
TransformObject obj = getTransformObject();
vec4 v4pos = vec4(position, 1.0);
<$transformModelToClipPos(cam, obj, v4pos, gl_Position)$>
}

7
libraries/model/src/model/SkyFromSpace.slf → libraries/render-utils/src/SkyFromSpace.slf
View file

@ -108,7 +108,8 @@ void main (void)
float fMiePhase = 1.5 * ((1.0 - g2) / (2.0 + g2)) * (1.0 + fCos*fCos) / pow(1.0 + g2 - 2.0*g*fCos, 1.5);
vec3 color = v3FrontColor * (v3InvWavelength * fKrESun);
vec3 secondaryColor = v3FrontColor * fKmESun;
gl_FragColor.rgb = color + fMiePhase * secondaryColor;
gl_FragColor.a = gl_FragColor.b;
gl_FragColor.rgb = pow(gl_FragColor.rgb, vec3(1.0/2.2));
vec3 finalColor = color + fMiePhase * secondaryColor;
gl_FragColor.a = finalColor.b;
gl_FragColor.rgb = pow(finalColor.rgb, vec3(1.0/2.2));
}

19
libraries/model/src/model/SkyFromSpace.slv → libraries/render-utils/src/SkyFromSpace.slv
View file

@ -1,5 +1,6 @@
#version 120
<@include gpu/Config.slh@>
<$VERSION_HEADER$>
// Generated on <$_SCRIBE_DATE$>
//
// For licensing information, see http://http.developer.nvidia.com/GPUGems/gpugems_app01.html:
//
@ -32,12 +33,20 @@
// Copyright (c) 2004 Sean O'Neil
//
<@include gpu/Transform.slh@>
<$declareStandardTransform()$>
uniform float fOuterRadius; // The outer (atmosphere) radius
varying vec3 position;
void main(void)
{
void main(void) {
position = gl_Vertex.xyz * fOuterRadius;
gl_Position = gl_ModelViewProjectionMatrix * vec4(position, 1.0);
// standard transform
TransformCamera cam = getTransformCamera();
TransformObject obj = getTransformObject();
vec4 v4pos = vec4(position, 1.0);
<$transformModelToClipPos(cam, obj, v4pos, gl_Position)$>
}