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Properly calculate light activation range

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scrawl 2013-03-29 20:21:37 +01:00
parent a39c129954
commit 5e7e9fd26a
1 changed files with 8 additions and 2 deletions
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10
apps/openmw/mwrender/objects.cpp
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@ -275,17 +275,23 @@ void Objects::insertLight (const MWWorld::Ptr& ptr, Ogre::Entity* skelBase, Ogre
bool quadratic = lightOutQuadInLin() ? !info.interior : lightQuadratic();
// with the standard 1 / (c + d*l + d*d*q) equation the attenuation factor never becomes zero,
// so we ignore lights if their attenuation falls below this factor.
const float threshold = 0.03;
if (!quadratic)
{
float r = radius * lightLinearRadiusMult();
float attenuation = lightLinearValue() / r;
light->setAttenuation(r*10, 0, attenuation, 0);
float activationRange = 1 / (threshold * attenuation);
light->setAttenuation(activationRange, 0, attenuation, 0);
}
else
{
float r = radius * lightQuadraticRadiusMult();
float attenuation = lightQuadraticValue() / std::pow(r, 2);
light->setAttenuation(r*10, 0, 0, attenuation);
float activationRange = std::sqrt(1 / (threshold * attenuation));
light->setAttenuation(activationRange, 0, 0, attenuation);
}
// If there's an AttachLight bone, attach the light to that, otherwise attach it to the base scene node