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Adds preferences for limiting the maximum number of local lights, as well as distance-based fading of local lights.

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This commit is contained in:
Areloch 2020-08-02 23:16:03 -05:00
parent 9e792845f7
commit 7b02d81b54
4 changed files with 115 additions and 2 deletions
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100
Engine/source/lighting/advanced/advancedLightBinManager.cpp
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@ -52,6 +52,11 @@ bool AdvancedLightBinManager::smDiffuseLightViz = false;
bool AdvancedLightBinManager::smSpecularLightViz = false;
bool AdvancedLightBinManager::smDetailLightingViz = false;
S32 AdvancedLightBinManager::smMaximumNumOfLights = -1;
bool AdvancedLightBinManager::smUseLightFade = false;
F32 AdvancedLightBinManager::smLightFadeStart = 50;
F32 AdvancedLightBinManager::smLightFadeEnd = 75;
ImplementEnumType( ShadowFilterMode,
"The shadow filtering modes for Advanced Lighting shadows.\n"
"@ingroup AdvancedLighting" )
@ -178,6 +183,15 @@ void AdvancedLightBinManager::consoleInit()
Con::addVariable("$AL::DetailLightingViz", TypeBool, &smDetailLightingViz,
"Enables debug rendering of the PSSM shadows.\n"
"@ingroup AdvancedLighting\n");
Con::addVariable("$pref::maximumNumOfLights",
TypeS32, &smMaximumNumOfLights,
"The maximum number of local lights that can be rendered at a time. If set to -1, then no limit.\n");
Con::addVariable("$pref::useLightFade", TypeBool, &smUseLightFade, "Indicates if local lights should utilize the distance-based object fadeout logic.\n");
Con::addVariable("$pref::lightFadeStart", TypeF32, &smLightFadeStart, "Distance at which light fading begins if $pref::useLightFade is on.\n");
Con::addVariable("$pref::lightFadeEnd", TypeF32, &smLightFadeEnd, "Distance at which light fading should have fully faded if $pref::useLightFade is on.\n");
}
bool AdvancedLightBinManager::setTargetSize(const Point2I &newTargetSize)
@ -260,6 +274,72 @@ void AdvancedLightBinManager::clearAllLights()
mNumLightsCulled = 0;
}
S32 QSORT_CALLBACK AdvancedLightBinManager::_lightScoreCmp(const LightBinEntry* a, const LightBinEntry* b)
{
F32 diff = a->lightInfo->getScore() - b->lightInfo->getScore();
return diff > 0 ? 1 : diff < 0 ? -1 : 0;
}
void AdvancedLightBinManager::_scoreLights(const MatrixF& cameraTrans)
{
PROFILE_SCOPE(AdvancedLightBinManager_scoreLights);
if (!LIGHTMGR)
return;
// Get all the lights.
const Point3F lumDot(0.2125f, 0.7154f, 0.0721f);
for (LightBinIterator itr = mLightBin.begin(); itr != mLightBin.end(); itr++)
{
// Get the light.
LightBinEntry& light = *itr;
F32 luminace = 0.0f;
F32 weight = 0.0f;
F32 score = 0.0f;
const bool isSpot = light.lightInfo->getType() == LightInfo::Spot;
const bool isPoint = light.lightInfo->getType() == LightInfo::Point;
if (isPoint || isSpot)
{
Point3F distVec = light.lightInfo->getPosition() - cameraTrans.getPosition();
F32 dist = distVec.len();
score = dist;// light.lightInfo->getRange().x / mMax(dist, 1.0f);
// Get the luminocity.
luminace = mDot(light.lightInfo->getColor(), lumDot) * light.lightInfo->getBrightness();
weight = light.lightInfo->getPriority();
//Distance fading test
if (smUseLightFade)
{
if (dist > smLightFadeStart)
{
F32 brightness = light.lightInfo->getBrightness();
float fadeOutAmt = (dist - smLightFadeStart) / (smLightFadeEnd - smLightFadeStart);
fadeOutAmt = 1 - fadeOutAmt;
light.lightInfo->setFadeAmount(fadeOutAmt);
}
}
else
{
light.lightInfo->setFadeAmount(1.0);
}
}
light.lightInfo->setScore(score * weight - luminace);
}
// Sort them!
mLightBin.sort(_lightScoreCmp);
}
void AdvancedLightBinManager::render( SceneRenderState *state )
{
PROFILE_SCOPE( AdvancedLightManager_Render );
@ -354,9 +434,25 @@ void AdvancedLightBinManager::render( SceneRenderState *state )
}
}
const Frustum& frustum = state->getCameraFrustum();
MatrixF invCam(frustum.getTransform());
invCam.inverse();
const MatrixF& cameraTrans = frustum.getTransform();
if(smUseLightFade || smMaximumNumOfLights != -1)
_scoreLights(cameraTrans);
S32 lightCount = 0;
// Blend the lights in the bin to the light buffer
for( LightBinIterator itr = mLightBin.begin(); itr != mLightBin.end(); itr++ )
{
if (smMaximumNumOfLights != -1 && lightCount >= smMaximumNumOfLights)
break;
lightCount++;
LightBinEntry& curEntry = *itr;
LightInfo *curLightInfo = curEntry.lightInfo;
if (curEntry.lightInfo->getType() >= LightInfo::Vector)
@ -368,7 +464,7 @@ void AdvancedLightBinManager::render( SceneRenderState *state )
ShadowMapParams *lsp = curLightInfo->getExtended<ShadowMapParams>();
// Skip lights which won't affect the scene.
if ( !curLightMat || curLightInfo->getBrightness() <= 0.001f )
if (!curLightMat || curLightInfo->getBrightness() * curLightInfo->getFadeAmount() <= 0.001f)
continue;
GFXDEBUGEVENT_SCOPE( AdvancedLightBinManager_Render_Light, ColorI::RED );
@ -694,7 +790,7 @@ void AdvancedLightBinManager::LightMaterialInfo::setLightParameters( const Light
MaterialParameters *matParams = matInstance->getMaterialParameters();
matParams->setSafe( lightColor, lightInfo->getColor() );
matParams->setSafe( lightBrightness, lightInfo->getBrightness() );
matParams->setSafe(lightBrightness, lightInfo->getBrightness() * lightInfo->getFadeAmount());
switch( lightInfo->getType() )
{