void Shape::configure() {
if (m_bsdf == NULL) {
ref<BSDF> bsdf = NULL;
if (isEmitter() || isSensor() || hasSubsurface()) {
/* Light source / sensor and no BSDF! -> set an all-absorbing BSDF */
Properties props("diffuse");
props.setSpectrum("reflectance", Spectrum(0.0f));
bsdf = static_cast<BSDF *> (PluginManager::getInstance()->
createObject(MTS_CLASS(BSDF), props));
} else if (!isMediumTransition()) {
/* A surface without BSDF, which is not a medium
transition/sensor/emitter/subsurface emitter doesn't make
much sense. Assign it a 0.5 Lambertian BRDF for convenience */
Properties props("diffuse");
props.setSpectrum("reflectance", Spectrum(0.5f));
bsdf = static_cast<BSDF *> (PluginManager::getInstance()->
createObject(MTS_CLASS(BSDF), props));
} else {
/* Assign a "null" BSDF */
bsdf = static_cast<BSDF *> (PluginManager::getInstance()->
createObject(MTS_CLASS(BSDF), Properties("null")));
}
bsdf->configure();
addChild(bsdf);
}
if ((m_bsdf->getType() & BSDF::ENull) && (isEmitter() || isSensor() || hasSubsurface()))
Log(EError, "Shape \"%s\" has an index-matched BSDF and an "
"emitter/sensor/subsurface attachment. This is not allowed!", getName().c_str());
}
ExpressionFor::ExpressionFor(Co<Expression> iterator, Co<Expression> start, Co<Expression> end, Co<Expression> delta, Co<Expression> body, bool is_inclusive) :
iterator(iterator),
start(start),
end(end),
delta(delta),
body(body),
is_inclusive(is_inclusive) {
isEmitter(false);
}
void Material::preview(Shape *shape) {
SurfacePoint pt;
pt.shape = shape;
if (isEmitter()) {
Emitter *emitter = getEmitter(pt);
emitter->preview(shape);
if (emitter != Material::s_nullEmitter)
safeDelete(emitter);
}
BSDF *bsdf = getBSDF(pt);
bsdf->preview(shape);
safeDelete(bsdf);
}
void Mesh::activate() {
if (!m_bsdf) {
/* If no material was assigned, instantiate a diffuse BRDF */
m_bsdf = static_cast<BSDF *>(
NoriObjectFactory::createInstance("diffuse", PropertyList()));
}
//check if the mesh is an emitter
if(isEmitter()){
m_dpdf = new DiscretePDF(m_F.cols());
//for every face set the surface area
for (int i = 0; i < m_F.cols(); ++i) {
float curArea = surfaceArea(i);
m_dpdf->append(curArea);
m_surfaceArea += curArea;
}
//normalize the pdf
m_dpdf->normalize();
}
}
///============================================================
void CEventEmitterMulti::addEmitter(IEventEmitter *e, bool mustDelete)
{
nlassert(e != this); // avoid infinite recursion
nlassert(!isEmitter(e));
_Emitters.push_back(std::make_pair(e, mustDelete));
}