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Fix weather particle fading

Browse Source 
Update rain particle system setup
pull/3047/head
Alexei Dobrohotov 4 years ago
parent cdf0bc1d8d
commit 396667f801
2 changed files with 70 additions and 81 deletions
Show Stats Download Patch File Download Diff File

147
apps/openmw/mwrender/sky.cpp
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@ -45,6 +45,8 @@
#include <components/sceneutil/visitor.hpp>
#include <components/sceneutil/shadow.hpp>
#include <components/nifosg/particle.hpp>
#include "../mwbase/environment.hpp"
#include "../mwbase/world.hpp"
@ -1136,7 +1138,7 @@ SkyManager::SkyManager(osg::Group* parentNode, Resource::SceneManager* sceneMana
, mWindSpeed(0.f)
, mEnabled(true)
, mSunEnabled(true)
, mWeatherAlpha(0.f)
, mEffectFade(0.f)
{
osg::ref_ptr<CameraRelativeTransform> skyroot (new CameraRelativeTransform);
skyroot->setName("Sky Root");
@ -1277,16 +1279,10 @@ private:
class AlphaFader : public SceneUtil::StateSetUpdater
{
public:
/// @param alphaUpdate variable which to update with alpha value
AlphaFader(float *alphaUpdate)
: mAlpha(1.f)
{
mAlphaUpdate = alphaUpdate;
}
void setAlpha(float alpha)
/// @param alpha the variable alpha value is recovered from
AlphaFader(float& alpha)
: mAlpha(alpha)
{
mAlpha = alpha;
}
void setDefaults(osg::StateSet* stateset) override
@ -1300,19 +1296,16 @@ public:
{
osg::Material* mat = static_cast<osg::Material*>(stateset->getAttribute(osg::StateAttribute::MATERIAL));
mat->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4f(0,0,0,mAlpha));
if (mAlphaUpdate)
*mAlphaUpdate = mAlpha;
}
// Helper for adding AlphaFaders to a subgraph
class SetupVisitor : public osg::NodeVisitor
{
public:
SetupVisitor(float *alphaUpdate)
SetupVisitor(float &alpha)
: osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
, mAlpha(alpha)
{
mAlphaUpdate = alphaUpdate;
}
void apply(osg::Node &node) override
@ -1332,56 +1325,24 @@ public:
callback = callback->getNestedCallback();
}
osg::ref_ptr<AlphaFader> alphaFader (new AlphaFader(mAlphaUpdate));
osg::ref_ptr<AlphaFader> alphaFader (new AlphaFader(mAlpha));
if (composite)
composite->addController(alphaFader);
else
node.addUpdateCallback(alphaFader);
mAlphaFaders.push_back(alphaFader);
}
}
traverse(node);
}
std::vector<osg::ref_ptr<AlphaFader> > getAlphaFaders()
{
return mAlphaFaders;
}
private:
std::vector<osg::ref_ptr<AlphaFader> > mAlphaFaders;
float *mAlphaUpdate;
float &mAlpha;
};
protected:
float mAlpha;
float *mAlphaUpdate;
};
class RainFader : public AlphaFader
{
public:
RainFader(float *alphaUpdate): AlphaFader(alphaUpdate)
{
}
void setDefaults(osg::StateSet* stateset) override
{
osg::ref_ptr<osg::Material> mat (new osg::Material);
mat->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4f(1,1,1,1));
mat->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4f(0,0,0,1));
mat->setColorMode(osg::Material::OFF);
stateset->setAttributeAndModes(mat, osg::StateAttribute::ON);
}
void apply(osg::StateSet *stateset, osg::NodeVisitor *nv) override
{
AlphaFader::apply(stateset,nv);
*mAlphaUpdate = mAlpha * 2.0; // mAlpha is limited to 0.6 so multiply by 2 to reach full intensity
}
float &mAlpha;
};
void SkyManager::setCamera(osg::Camera *camera)
@ -1465,6 +1426,37 @@ protected:
}
};
class WeatherAlphaOperator : public osgParticle::Operator
{
public:
WeatherAlphaOperator(float& alpha, bool rain)
: mAlpha(alpha)
, mIsRain(rain)
{
}
osg::Object *cloneType() const override
{
return nullptr;
}
osg::Object *clone(const osg::CopyOp &op) const override
{
return nullptr;
}
void operate(osgParticle::Particle *particle, double dt) override
{
constexpr float rainThreshold = 0.6f; // Rain_Threshold?
const float alpha = mIsRain ? mAlpha * rainThreshold : mAlpha;
particle->setAlphaRange(osgParticle::rangef(alpha, alpha));
}
private:
float &mAlpha;
bool mIsRain;
};
void SkyManager::createRain()
{
if (mRainNode)
@ -1472,7 +1464,7 @@ void SkyManager::createRain()
mRainNode = new osg::Group;
mRainParticleSystem = new osgParticle::ParticleSystem;
mRainParticleSystem = new NifOsg::ParticleSystem;
osg::Vec3 rainRange = osg::Vec3(mRainDiameter, mRainDiameter, (mRainMinHeight+mRainMaxHeight)/2.f);
mRainParticleSystem->setParticleAlignment(osgParticle::ParticleSystem::FIXED);
@ -1491,6 +1483,12 @@ void SkyManager::createRain()
stateset->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
osg::ref_ptr<osg::Material> mat (new osg::Material);
mat->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4f(1,1,1,1));
mat->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4f(1,1,1,1));
mat->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
stateset->setAttributeAndModes(mat, osg::StateAttribute::ON);
osgParticle::Particle& particleTemplate = mRainParticleSystem->getDefaultParticleTemplate();
particleTemplate.setSizeRange(osgParticle::rangef(5.f, 15.f));
particleTemplate.setAlphaRange(osgParticle::rangef(1.f, 1.f));
@ -1523,6 +1521,7 @@ void SkyManager::createRain()
osg::ref_ptr<osgParticle::ModularProgram> program (new osgParticle::ModularProgram);
program->addOperator(new WrapAroundOperator(mCamera,rainRange));
program->addOperator(new WeatherAlphaOperator(mEffectFade, true));
program->setParticleSystem(mRainParticleSystem);
mRainNode->addChild(program);
@ -1530,8 +1529,7 @@ void SkyManager::createRain()
mRainNode->addChild(mRainParticleSystem);
mRainNode->addChild(updater);
mRainFader = new RainFader(&mWeatherAlpha);
mRainNode->addUpdateCallback(mRainFader);
// Note: if we ever switch to regular geometry rain, it'll need to use an AlphaFader.
mRainNode->addCullCallback(mUnderwaterSwitch);
mRainNode->setNodeMask(Mask_WeatherParticles);
@ -1549,7 +1547,6 @@ void SkyManager::destroyRain()
mCounter = nullptr;
mRainParticleSystem = nullptr;
mRainShooter = nullptr;
mRainFader = nullptr;
}
SkyManager::~SkyManager()
@ -1588,17 +1585,18 @@ void SkyManager::update(float duration)
if (!mEnabled)
{
if (mRainIntensityUniform)
mRainIntensityUniform->set((float) 0.0);
mRainIntensityUniform->set(0.f);
return;
}
if (mRainIntensityUniform)
{
if (mIsStorm || (!hasRain() && !mParticleNode))
mRainIntensityUniform->set((float) 0.0);
else
mRainIntensityUniform->set((float) mWeatherAlpha);
float rainIntensity = 0.f;
if (!mIsStorm && (hasRain() || mParticleNode))
rainIntensity = mEffectFade;
mRainIntensityUniform->set(rainIntensity);
}
switchUnderwaterRain();
@ -1712,7 +1710,6 @@ void SkyManager::setWeather(const WeatherResult& weather)
{
mParticleNode->removeChild(mParticleEffect);
mParticleEffect = nullptr;
mParticleFaders.clear();
}
if (mCurrentParticleEffect.empty())
@ -1738,28 +1735,26 @@ void SkyManager::setWeather(const WeatherResult& weather)
SceneUtil::AssignControllerSourcesVisitor assignVisitor(std::shared_ptr<SceneUtil::ControllerSource>(new SceneUtil::FrameTimeSource));
mParticleEffect->accept(assignVisitor);
AlphaFader::SetupVisitor alphaFaderSetupVisitor(&mWeatherAlpha);
AlphaFader::SetupVisitor alphaFaderSetupVisitor(mEffectFade);
mParticleEffect->accept(alphaFaderSetupVisitor);
mParticleFaders = alphaFaderSetupVisitor.getAlphaFaders();
SceneUtil::DisableFreezeOnCullVisitor disableFreezeOnCullVisitor;
mParticleEffect->accept(disableFreezeOnCullVisitor);
if (!weather.mIsStorm)
{
SceneUtil::FindByClassVisitor findPSVisitor(std::string("ParticleSystem"));
mParticleEffect->accept(findPSVisitor);
SceneUtil::FindByClassVisitor findPSVisitor(std::string("ParticleSystem"));
mParticleEffect->accept(findPSVisitor);
for (unsigned int i = 0; i < findPSVisitor.mFoundNodes.size(); ++i)
{
osgParticle::ParticleSystem *ps = static_cast<osgParticle::ParticleSystem *>(findPSVisitor.mFoundNodes[i]);
for (unsigned int i = 0; i < findPSVisitor.mFoundNodes.size(); ++i)
{
osgParticle::ParticleSystem *ps = static_cast<osgParticle::ParticleSystem *>(findPSVisitor.mFoundNodes[i]);
osg::ref_ptr<osgParticle::ModularProgram> program (new osgParticle::ModularProgram);
osg::ref_ptr<osgParticle::ModularProgram> program (new osgParticle::ModularProgram);
if (!mIsStorm)
program->addOperator(new WrapAroundOperator(mCamera,osg::Vec3(1024,1024,800)));
program->setParticleSystem(ps);
mParticleNode->addChild(program);
}
program->addOperator(new WeatherAlphaOperator(mEffectFade, false));
program->setParticleSystem(ps);
mParticleNode->addChild(program);
}
}
}
@ -1846,11 +1841,7 @@ void SkyManager::setWeather(const WeatherResult& weather)
mAtmosphereNightNode->setNodeMask(weather.mNight ? ~0 : 0);
if (mRainFader)
mRainFader->setAlpha(weather.mEffectFade * 0.6); // * Rain_Threshold?
for (AlphaFader* fader : mParticleFaders)
fader->setAlpha(weather.mEffectFade);
mEffectFade = weather.mEffectFade;
}
void SkyManager::sunEnable()

4
apps/openmw/mwrender/sky.hpp
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@ -200,7 +200,6 @@ namespace MWRender
osg::ref_ptr<osg::PositionAttitudeTransform> mParticleNode;
osg::ref_ptr<osg::Node> mParticleEffect;
std::vector<osg::ref_ptr<AlphaFader> > mParticleFaders;
osg::ref_ptr<UnderwaterSwitchCallback> mUnderwaterSwitch;
osg::ref_ptr<osg::PositionAttitudeTransform> mCloudNode;
@ -227,7 +226,6 @@ namespace MWRender
osg::ref_ptr<osgParticle::BoxPlacer> mPlacer;
osg::ref_ptr<RainCounter> mCounter;
osg::ref_ptr<RainShooter> mRainShooter;
osg::ref_ptr<RainFader> mRainFader;
bool mCreated;
@ -269,7 +267,7 @@ namespace MWRender
bool mEnabled;
bool mSunEnabled;
float mWeatherAlpha;
float mEffectFade;
osg::Vec4f mMoonScriptColor;
};

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