void DeferredLight::SetAttenuation(float c, float b, float a)
{
float outerRadius = mParentLight->getAttenuationRange();
// There is attenuation? Set material accordingly
if (c != 1.0f || b != 0.0f || a != 0.0f)
{
ENABLE_BIT(mPermutation, LightMaterialGenerator::MI_ATTENUATED);
if (mParentLight->getType() == Ogre::Light::LT_POINT)
{
// Calculate radius from attenuation
int thresholdLevel = 10; // difference of 10-15 levels deemed unnoticeable
float threshold = 1.0f / ((float)thresholdLevel / 256.0f);
// Use quadratic formula to Determine outer radius
c = c - threshold;
float d = sqrt(b * b - 4.0f * a * c);
outerRadius = (-2.0f * c) / (b + d);
outerRadius *= 1.2f;
}
}
else
{
DISABLE_BIT(mPermutation, LightMaterialGenerator::MI_ATTENUATED);
}
SetupGeometry(outerRadius);
}
HRESULT ColladaLoader::Run()
{
StartLogging();
if(!Initialize()) {
StopLogging();
return -1;
} else {
SetupShaders();
SetupMatrices();
SetupLights();
SetupGeometry();
MainLoop();
Terminate();
StopLogging();
}
return 0;
}
