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());
}
void Sensor::configure() {
if (m_film == NULL) {
/* Instantiate an EXR film by default */
m_film = static_cast<Film*> (PluginManager::getInstance()->
createObject(MTS_CLASS(Film), Properties("hdrfilm")));
m_film->configure();
}
if (m_sampler == NULL) {
/* No sampler has been selected - load an independent filter with 4 samples/pixel by default */
Properties props("independent");
props.setInteger("sampleCount", 4);
m_sampler = static_cast<Sampler *> (PluginManager::getInstance()->
createObject(MTS_CLASS(Sampler), props));
m_sampler->configure();
}
m_aspect = m_film->getSize().x /
(Float) m_film->getSize().y;
m_resolution = Vector2(m_film->getCropSize());
m_invResolution = Vector2(
(Float) 1 / m_resolution.x,
(Float) 1 / m_resolution.y);
}
std::pair<Texture *, Texture *> BSDF::ensureEnergyConservation(
Texture *tex1, Texture *tex2, const std::string ¶mName1,
const std::string ¶mName2, Float max) const {
if (!m_ensureEnergyConservation)
return std::make_pair(tex1, tex2);
Float actualMax = (tex1->getMaximum() + tex2->getMaximum()).max();
if (actualMax > max) {
std::ostringstream oss;
Float scale = 0.99f * (max / actualMax);
oss << "The BSDF" << endl << toString() << endl
<< "violates energy conservation! The parameters \"" << paramName1 << "\" "
<< "and \"" << paramName2 << "\" sum to a component-wise maximum of "
<< actualMax << " (which is > " << max << "!) and will therefore be "
<< "scaled by " << scale << " to prevent issues. Specify the parameter "
<< "ensureEnergyConservation=false to the BSDF to prevent this from "
<< "happening.";
Log(EWarn, "%s", oss.str().c_str());
Properties props("scale");
props.setFloat("scale", scale);
Texture *scaleTexture1 = static_cast<Texture *> (PluginManager::getInstance()->
createObject(MTS_CLASS(Texture), props));
Texture *scaleTexture2 = static_cast<Texture *> (PluginManager::getInstance()->
createObject(MTS_CLASS(Texture), props));
scaleTexture1->addChild(tex1);
scaleTexture1->configure();
scaleTexture2->addChild(tex2);
scaleTexture2->configure();
return std::make_pair(scaleTexture1, scaleTexture2);
}
return std::make_pair(tex1, tex2);
}
void Sensor::addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(Sampler))) {
m_sampler = static_cast<Sampler *>(child);
} else if (child->getClass()->derivesFrom(MTS_CLASS(Film))) {
m_film = static_cast<Film *>(child);
} else {
AbstractEmitter::addChild(name, child);
}
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(BSDF))) {
BSDF *bsdf = static_cast<BSDF *>(child);
m_bsdfs.push_back(bsdf);
bsdf->incRef();
} else if (child->getClass()->derivesFrom(MTS_CLASS(Texture)) && name == "weight") {
m_weight = static_cast<Texture *>(child);
} else {
BSDF::addChild(name, child);
}
}
void Shape::addChild(const std::string &name, ConfigurableObject *child) {
const Class *cClass = child->getClass();
if (cClass->derivesFrom(MTS_CLASS(BSDF))) {
m_bsdf = static_cast<BSDF *>(child);
} else if (cClass->derivesFrom(MTS_CLASS(Emitter))) {
Emitter *emitter = static_cast<Emitter *>(child);
if (m_emitter != NULL)
Log(EError, "Tried to attach multiple emitters to a shape!");
if (emitter) {
if (!emitter->isOnSurface())
Log(EError, "Tried to attach an incompatible emitter to a surface!");
if (m_exteriorMedium)
emitter->setMedium(m_exteriorMedium);
}
m_emitter = emitter;
} else if (cClass->derivesFrom(MTS_CLASS(Sensor))) {
Sensor *sensor = static_cast<Sensor *>(child);
if (m_sensor != NULL)
Log(EError, "Tried to attach multiple sensors to a shape!");
if (sensor) {
if (!sensor->isOnSurface())
Log(EError, "Tried to attach an incompatible sensor to a surface!");
if (m_exteriorMedium)
sensor->setMedium(m_exteriorMedium);
}
m_sensor = sensor;
} else if (cClass->derivesFrom(MTS_CLASS(Subsurface))) {
Assert(m_subsurface == NULL);
if (m_interiorMedium != NULL)
Log(EError, "Shape \"%s\" has both an interior medium "
"and a subsurface scattering model -- please choose one or the other!", getName().c_str());
m_subsurface = static_cast<Subsurface *>(child);
} else if (cClass->derivesFrom(MTS_CLASS(Medium))) {
if (name == "interior") {
Assert(m_interiorMedium == NULL || m_interiorMedium == child);
if (m_subsurface != NULL)
Log(EError, "Shape \"%s\" has both an interior medium "
"and a subsurface scattering model -- please choose one or the other!", getName().c_str());
m_interiorMedium = static_cast<Medium *>(child);
} else if (name == "exterior") {
Assert(m_exteriorMedium == NULL || m_exteriorMedium == child);
m_exteriorMedium = static_cast<Medium *>(child);
if (m_emitter)
m_emitter->setMedium(m_exteriorMedium);
if (m_sensor)
m_sensor->setMedium(m_exteriorMedium);
} else {
Log(EError, "Shape: Invalid medium child (must be named "
"'interior' or 'exterior')!");
}
} else {
ConfigurableObject::addChild(name, child);
}
}
void addChild(const std::string &name, ConfigurableObject *child) {
const Class *cClass = child->getClass();
if (cClass->derivesFrom(MTS_CLASS(Integrator))) {
if (!cClass->derivesFrom(MTS_CLASS(SamplingIntegrator)))
Log(EError, "The sub-integrator must be derived from the class SamplingIntegrator");
m_subIntegrator = static_cast<SamplingIntegrator *>(child);
m_subIntegrator->setParent(this);
} else {
Integrator::addChild(name, child);
}
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(BSDF))) {
if (m_nested != NULL)
Log(EError, "Only a single nested BSDF can be added!");
m_nested = static_cast<BSDF *>(child);
} else if (child->getClass()->derivesFrom(MTS_CLASS(Texture))) {
if (m_displacement != NULL)
Log(EError, "Only a single displacement texture can be specified!");
m_displacement = static_cast<Texture *>(child);
} else {
BSDF::addChild(name, child);
}
}
Texture *BSDF::ensureEnergyConservation(Texture *texture,
const std::string ¶mName, Float max) const {
if (!m_ensureEnergyConservation)
return texture;
Float actualMax = texture->getMaximum().max();
if (actualMax > max) {
std::ostringstream oss;
Float scale = 0.99f * (max / actualMax);
oss << "The BSDF" << endl << toString() << endl
<< "violates energy conservation! The parameter \"" << paramName << "\" "
<< "has a component-wise maximum of "<< actualMax << " (which is > " << max << "!) "
<< "and will therefore be scaled by " << scale << " to prevent "
<< "issues. Specify the parameter ensureEnergyConservation=false "
<< "to the BSDF to prevent this from happening.";
Log(EWarn, "%s", oss.str().c_str());
Properties props("scale");
props.setFloat("scale", scale);
Texture *scaleTexture = static_cast<Texture *> (PluginManager::getInstance()->
createObject(MTS_CLASS(Texture), props));
scaleTexture->addChild(texture);
scaleTexture->configure();
return scaleTexture;
}
return texture;
}
bool preprocess(const Scene *scene, RenderQueue *queue, const RenderJob *job,
int sceneResID, int cameraResID, int samplerResID) {
if (m_ready)
return true;
if (!scene->getIntegrator()->getClass()
->derivesFrom(MTS_CLASS(SampleIntegrator))) {
Log(EError, "The dipole subsurface integrator requires "
"a sampling-based surface integrator!");
}
m_octree = new IrradianceOctree(m_maxDepth, m_minDelta,
scene->getKDTree()->getAABB());
Float sa = 0;
for (std::vector<Shape *>::iterator it = m_shapes.begin();
it != m_shapes.end(); ++it)
sa += (*it)->getSurfaceArea();
size_t sampleCount = (size_t) std::ceil(sa / (M_PI * m_minMFP * m_minMFP)
* m_sampleMultiplier);
Log(EInfo, "Generating " SIZE_T_FMT " irradiance samples..", sampleCount);
ref<Scheduler> sched = Scheduler::getInstance();
/* This could be a bit more elegant.. - inform the irradiance
sampler about the index of this subsurface integrator */
std::vector<Subsurface *> ssIntegrators
= scene->getSubsurfaceIntegrators();
int index = -1;
for (size_t i=0; i<ssIntegrators.size(); ++i) {
if (ssIntegrators[i] == this) {
index = (int) i;
break;
}
}
Assert(index != -1);
ref<IrradianceSamplingProcess> proc = new IrradianceSamplingProcess(
sampleCount, (size_t) std::ceil(sampleCount/100.0f), index,
m_irrSamples, m_irrIndirect, job);
proc->bindResource("scene", sceneResID);
scene->bindUsedResources(proc);
m_proc = proc;
sched->schedule(proc);
sched->wait(proc);
m_proc = NULL;
if (proc->getReturnStatus() != ParallelProcess::ESuccess)
return false;
const IrradianceRecordVector &results = *proc->getSamples();
for (size_t i=0; i<results.size(); ++i)
m_octree->addSample(results[i]);
m_octree->preprocess();
m_octreeResID = Scheduler::getInstance()->registerResource(m_octree);
m_ready = true;
return true;
}
void configure() {
if (m_phase == NULL)
m_phase = static_cast<PhaseFunction *> (PluginManager::getInstance()->
createObject(MTS_CLASS(PhaseFunction), Properties("isotropic")));
if (m_sigmaT != NULL || m_albedo != NULL) {
/* Support for the alternative scattering/absorption
* coefficient parameter passing convention */
if (m_sigmaT == NULL || m_albedo == NULL)
SLog(EError, "Please provide *both* sigmaT & albedo!");
m_sigmaS = new SpectrumProductTexture(m_sigmaT, m_albedo);
m_sigmaA = new SpectrumSubtractionTexture(m_sigmaT, m_sigmaS);
m_sigmaT = NULL;
m_albedo = NULL;
}
int extraFlags = m_sigmaS->isConstant() && m_sigmaA->isConstant() ? 0 : ESpatiallyVarying;
m_components.clear();
m_components.push_back(EGlossyReflection | EFrontSide | EBackSide | ECanUseSampler | extraFlags);
if (m_thickness != std::numeric_limits<Float>::infinity()) {
m_components.push_back(EGlossyTransmission | EFrontSide | EBackSide | ECanUseSampler | extraFlags);
m_components.push_back(EDeltaTransmission | EFrontSide | EBackSide | ECanUseSampler | extraFlags);
}
m_usesRayDifferentials = m_sigmaS->usesRayDifferentials()
|| m_sigmaA->usesRayDifferentials();
BSDF::configure();
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(BSDF))) {
if (m_nested != NULL)
Log(EError, "Only a single nested BRDF can be added!");
m_nested = static_cast<BSDF *>(child);
} else if (child->getClass()->derivesFrom(MTS_CLASS(Texture))) {
if (name == "sigmaA")
m_sigmaA = static_cast<Texture *>(child);
else if (name == "alpha")
m_alpha = static_cast<Texture *>(child);
else
BSDF::addChild(name, child);
} else {
BSDF::addChild(name, child);
}
}
CausticPerturbation::CausticPerturbation(const Scene *scene, Sampler *sampler,
MemoryPool &pool, Float minJump, Float coveredArea) :
m_scene(scene), m_sampler(sampler), m_pool(pool) {
if (!scene->getSensor()->getClass()->derivesFrom(MTS_CLASS(PerspectiveCamera)))
Log(EError, "The caustic perturbation requires a perspective camera.");
const PerspectiveCamera *camera = static_cast<const PerspectiveCamera *>(scene->getSensor());
Vector2i filmSize = camera->getFilm()->getSize(),
cropSize = camera->getFilm()->getCropSize();
/* Simple heuristic for choosing a jump size: assumes that each
pixel on the camera subtends the same area on the sphere */
Float degPerPixel = std::min(
camera->getXFov() / filmSize.x,
camera->getYFov() / filmSize.y),
radPerPixel = degPerPixel * M_PI / 180.0f;
Float r1 = minJump,
r2 = std::sqrt(coveredArea * cropSize.x*cropSize.y / M_PI); /* [Veach, p. 354] */
/* These represent the *desired* angle change range as seen from the camera */
m_theta1 = radPerPixel * r1;
m_theta2 = radPerPixel * r2;
m_logRatio = -math::fastlog(m_theta2 / m_theta1);
}
void Medium::configure() {
if (m_phaseFunction == NULL) {
m_phaseFunction = static_cast<PhaseFunction *> (PluginManager::getInstance()->
createObject(MTS_CLASS(PhaseFunction), Properties("isotropic")));
m_phaseFunction->configure();
}
}
ref<Shape> createShape(const Scene *scene) {
/* Create a bounding sphere that surrounds the scene */
BSphere sceneBSphere(scene->getAABB().getBSphere());
sceneBSphere.radius = std::max(Epsilon, sceneBSphere.radius * 1.5f);
BSphere geoBSphere(scene->getKDTree()->getAABB().getBSphere());
if (sceneBSphere != m_sceneBSphere || geoBSphere != m_geoBSphere) {
m_sceneBSphere = sceneBSphere;
m_geoBSphere = geoBSphere;
configure();
}
Transform trafo =
Transform::translate(Vector(m_sceneBSphere.center)) *
Transform::scale(Vector(m_sceneBSphere.radius));
Properties props("sphere");
props.setTransform("toWorld", trafo);
props.setBoolean("flipNormals", true);
Shape *shape = static_cast<Shape *> (PluginManager::getInstance()->
createObject(MTS_CLASS(Shape), props));
shape->addChild(this);
shape->configure();
return shape;
}
BitmapTexture(Stream *stream, InstanceManager *manager)
: Texture2D(stream, manager) {
m_filename = stream->readString();
Log(EDebug, "Unserializing texture \"%s\"", m_filename.filename().string().c_str());
m_filterType = (EMIPFilterType) stream->readUInt();
m_wrapModeU = (ReconstructionFilter::EBoundaryCondition) stream->readUInt();
m_wrapModeV = (ReconstructionFilter::EBoundaryCondition) stream->readUInt();
m_gamma = stream->readFloat();
m_maxAnisotropy = stream->readFloat();
m_channel = stream->readString();
size_t size = stream->readSize();
ref<MemoryStream> mStream = new MemoryStream(size);
stream->copyTo(mStream, size);
mStream->seek(0);
ref<Bitmap> bitmap = new Bitmap(Bitmap::EAuto, mStream);
if (m_gamma != 0)
bitmap->setGamma(m_gamma);
/* Downsample using a 2-lobed Lanczos reconstruction filter */
Properties rfilterProps("lanczos");
rfilterProps.setInteger("lobes", 2);
ref<ReconstructionFilter> rfilter = static_cast<ReconstructionFilter *> (
PluginManager::getInstance()->createObject(
MTS_CLASS(ReconstructionFilter), rfilterProps));
rfilter->configure();
Bitmap::EPixelFormat pixelFormat;
if (!m_channel.empty()) {
/* Create a texture from a certain channel of an image */
pixelFormat = Bitmap::ELuminance;
bitmap = bitmap->extractChannel(findChannel(bitmap, m_channel));
if (m_channel == "a")
bitmap->setGamma(1.0f);
} else {
switch (bitmap->getPixelFormat()) {
case Bitmap::ELuminance:
case Bitmap::ELuminanceAlpha:
pixelFormat = Bitmap::ELuminance;
break;
case Bitmap::ERGB:
case Bitmap::ERGBA:
pixelFormat = Bitmap::ERGB;
break;
default:
Log(EError, "The input image has an unsupported pixel format!");
return;
}
}
if (pixelFormat == Bitmap::ELuminance)
m_mipmap1 = new MIPMap1(bitmap, pixelFormat, Bitmap::EFloat,
rfilter, m_wrapModeU, m_wrapModeV, m_filterType, m_maxAnisotropy,
fs::path(), 0);
else
m_mipmap3 = new MIPMap3(bitmap, pixelFormat, Bitmap::EFloat,
rfilter, m_wrapModeU, m_wrapModeV, m_filterType, m_maxAnisotropy,
fs::path(), 0);
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(Texture)) && name == "specularReflectance") {
m_specularReflectance = static_cast<Texture *>(child);
m_usesRayDifferentials |= m_specularReflectance->usesRayDifferentials();
} else {
BSDF::addChild(name, child);
}
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(Texture))
&& (name == "reflectance" || name == "diffuseReflectance")) {
} else {
BSDF::addChild(name, child);
}
}
void AbstractEmitter::addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(Medium))) {
Assert(m_medium == NULL);
m_medium = static_cast<Medium *>(child);
} else {
ConfigurableObject::addChild(name, child);
}
}
size_t Scheduler::getLocalWorkerCount() const {
size_t count = 0;
LockGuard lock(m_mutex);
for (size_t i=0; i<m_workers.size(); ++i) {
if (m_workers[i]->getClass() == MTS_CLASS(LocalWorker))
count++;
}
return count;
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(BSDF))) {
if (m_nested != NULL)
Log(EError, "Only a single nested BSDF can be added!");
m_nested = static_cast<BSDF *>(child);
} else if (child->getClass()->derivesFrom(MTS_CLASS(Texture))) {
if (m_displacement != NULL)
Log(EError, "Only a single displacement texture can be specified!");
const Properties &props = child->getProperties();
if (props.getPluginName() == "bitmap" && !props.hasProperty("gamma"))
Log(EError, "When using a bitmap texture as a bump map, please explicitly specify "
"the 'gamma' parameter of the bitmap plugin. In most cases the following is the correct choice: "
"<float name=\"gamma\" value=\"1.0\"/>");
m_displacement = static_cast<Texture *>(child);
} else {
BSDF::addChild(name, child);
}
}
void Luminaire::addChild(const std::string &name, ConfigurableObject *child) {
const Class *cClass = child->getClass();
if (cClass->derivesFrom(MTS_CLASS(Medium))) {
Assert(m_medium == NULL);
m_medium = static_cast<Medium *>(child);
} else {
ConfigurableObject::addChild(name, child);
}
}
void Medium::addChild(const std::string &name, ConfigurableObject *child) {
const Class *cClass = child->getClass();
if (cClass->derivesFrom(MTS_CLASS(PhaseFunction))) {
Assert(m_phaseFunction == NULL);
m_phaseFunction = static_cast<PhaseFunction *>(child);
} else {
Log(EError, "Medium: Invalid child node! (\"%s\")",
cClass->getName().c_str());
}
}
void addChild(const std::string &name, ConfigurableObject *child) {
const Class *cClass = child->getClass();
if (cClass->derivesFrom(MTS_CLASS(PhaseFunction))) {
Assert(m_phase == NULL);
m_phase = static_cast<PhaseFunction *>(child);
} else if (cClass->derivesFrom(MTS_CLASS(Texture))) {
if (name == "sigmaS")
m_sigmaS = static_cast<Texture *>(child);
else if (name == "sigmaA")
m_sigmaA = static_cast<Texture *>(child);
else if (name == "sigmaT")
m_sigmaT = static_cast<Texture *>(child);
else if (name == "albedo")
m_albedo = static_cast<Texture *>(child);
else
BSDF::addChild(name, child);
} else {
BSDF::addChild(name, child);
}
}
ref<Shape> createShape(const Scene *scene) {
ref<AnimatedTransform> trafo = new AnimatedTransform(m_worldTransform);
trafo->prependScale(Vector(m_apertureRadius));
Properties props("disk");
props.setAnimatedTransform("toWorld", trafo);
Shape *shape = static_cast<Shape *> (PluginManager::getInstance()->
createObject(MTS_CLASS(Shape), props));
shape->addChild(this);
shape->configure();
return shape;
}
/// Connect to globally shared resources
void wakeup(ConfigurableObject *parent, std::map<std::string, SerializableObject *> ¶ms) {
if (!m_globalPhotonMap.get() && params.find("globalPhotonMap") != params.end())
m_globalPhotonMap = static_cast<PhotonMap *>(params["globalPhotonMap"]);
if (!m_causticPhotonMap.get() && params.find("causticPhotonMap") != params.end())
m_causticPhotonMap = static_cast<PhotonMap *>(params["causticPhotonMap"]);
if (!m_bre.get() && params.find("bre") != params.end())
m_bre = static_cast<BeamRadianceEstimator *>(params["bre"]);
if (parent && parent->getClass()->derivesFrom(MTS_CLASS(SamplingIntegrator)))
m_parentIntegrator = static_cast<SamplingIntegrator *>(parent);
else
m_parentIntegrator = this;
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(Texture))) {
if (name == "exponent")
m_exponent = static_cast<Texture *>(child);
else if (name == "specularReflectance")
m_specularReflectance = static_cast<Texture *>(child);
else if (name == "diffuseReflectance")
m_diffuseReflectance = static_cast<Texture *>(child);
else
BSDF::addChild(name, child);
} else {
BSDF::addChild(name, child);
}
}
void configure() {
PhaseFunction::configure();
m_type = EAnisotropic | ENonSymmetric;
Properties props("independent");
m_sampler = static_cast<Sampler*>(PluginManager::getInstance()->createObject(MTS_CLASS(Sampler), props));
m_sampler->configure();
if (m_stddev != -1.f) {
Float sigma1 = m_fiberDistr.sigmaT(0.f) * 2.f;
Float sigma2 = sigma1;
Float sigma3 = m_fiberDistr.sigmaT(1.f) * 2.f;
D = Matrix3x3(Vector(sigma1 * sigma1, 0, 0), Vector(0, sigma2 * sigma2, 0), Vector(0, 0, sigma3 * sigma3));
}
}
void setParent(ConfigurableObject *parent) {
Sensor::setParent(parent);
if (parent->getClass()->derivesFrom(MTS_CLASS(Shape))) {
Shape *shape = static_cast<Shape *>(parent);
if (m_shape == shape || shape->isCompound())
return;
if (m_shape != NULL)
Log(EError, "An irradiance sensor cannot be parent of multiple shapes");
m_shape = shape;
} else {
Log(EError, "An irradiance sensor must be child of a shape instance");
}
}
void addChild(const std::string &name, ConfigurableObject *child) {
if (child->getClass()->derivesFrom(MTS_CLASS(Texture))) {
if (name == "alpha")
m_alphaU = m_alphaV = static_cast<Texture *>(child);
else if (name == "alphaU")
m_alphaU = static_cast<Texture *>(child);
else if (name == "alphaV")
m_alphaV = static_cast<Texture *>(child);
else if (name == "specularReflectance")
m_specularReflectance = static_cast<Texture *>(child);
else
BSDF::addChild(name, child);
} else {
BSDF::addChild(name, child);
}
}