RoughConductor(const Properties &props) : BSDF(props) {
ref<FileResolver> fResolver = Thread::getThread()->getFileResolver();
m_specularReflectance = new ConstantSpectrumTexture(
props.getSpectrum("specularReflectance", Spectrum(1.0f)));
std::string materialName = props.getString("material", "Cu");
Spectrum intEta, intK;
if (boost::to_lower_copy(materialName) == "none") {
intEta = Spectrum(0.0f);
intK = Spectrum(1.0f);
} else {
intEta.fromContinuousSpectrum(InterpolatedSpectrum(
fResolver->resolve("data/ior/" + materialName + ".eta.spd")));
intK.fromContinuousSpectrum(InterpolatedSpectrum(
fResolver->resolve("data/ior/" + materialName + ".k.spd")));
}
Float extEta = lookupIOR(props, "extEta", "air");
m_eta = props.getSpectrum("eta", intEta) / extEta;
m_k = props.getSpectrum("k", intK) / extEta;
MicrofacetDistribution distr(props);
m_type = distr.getType();
m_sampleVisible = distr.getSampleVisible();
m_alphaU = new ConstantFloatTexture(distr.getAlphaU());
if (distr.getAlphaU() == distr.getAlphaV())
m_alphaV = m_alphaU;
else
m_alphaV = new ConstantFloatTexture(distr.getAlphaV());
}
RoughCoating(const Properties &props) : BSDF(props) {
/* Specifies the internal index of refraction at the interface */
Float intIOR = lookupIOR(props, "intIOR", "bk7");
/* Specifies the external index of refraction at the interface */
Float extIOR = lookupIOR(props, "extIOR", "air");
if (intIOR < 0 || extIOR < 0 || intIOR == extIOR)
Log(EError, "The interior and exterior indices of "
"refraction must be positive and differ!");
m_eta = intIOR / extIOR;
m_invEta = 1 / m_eta;
/* Specifies the absorption within the layer */
m_sigmaA = new ConstantSpectrumTexture(
props.getSpectrum("sigmaA", Spectrum(0.0f)));
/* Specifies the layer's thickness using the inverse units of sigmaA */
m_thickness = props.getFloat("thickness", 1);
/* Specifies a multiplier for the specular reflectance component */
m_specularReflectance = new ConstantSpectrumTexture(
props.getSpectrum("specularReflectance", Spectrum(1.0f)));
m_distribution = MicrofacetDistribution(
props.getString("distribution", "beckmann")
);
if (m_distribution.isAnisotropic())
Log(EError, "The 'roughcoating' plugin currently does not support "
"anisotropic microfacet distributions!");
m_alpha = new ConstantFloatTexture(
props.getFloat("alpha", 0.1f));
m_specularSamplingWeight = 0.0f;
}
SmoothConductor(const Properties &props) : BSDF(props) {
ref<FileResolver> fResolver = Thread::getThread()->getFileResolver();
m_specularReflectance = new ConstantSpectrumTexture(
props.getSpectrum("specularReflectance", Spectrum(1.0f)));
std::string materialName = props.getString("material", "Cu");
Spectrum intEta, intK;
if (boost::to_lower_copy(materialName) == "none") {
intEta = Spectrum(0.0f);
intK = Spectrum(1.0f);
} else {
intEta.fromContinuousSpectrum(InterpolatedSpectrum(
fResolver->resolve("data/ior/" + materialName + ".eta.spd")));
intK.fromContinuousSpectrum(InterpolatedSpectrum(
fResolver->resolve("data/ior/" + materialName + ".k.spd")));
}
Float extEta = lookupIOR(props, "extEta", "air");
m_eta = props.getSpectrum("eta", intEta) / extEta;
m_k = props.getSpectrum("k", intK) / extEta;
}