std::shared_ptr<Texture> Scene::fetchTexture(JsonPtr value, TexelConversion conversion) const
{
// Note: TexelConversions are only honored by BitmapTexture.
// This is inconsistent, but conversions do not really make sense for other textures,
// unless the user expects e.g. a ConstantTexture with Vec3 argument to select the green
// channel when used in a TransparencyBsdf.
if (value.isString()) {
return _textureCache->fetchTexture(fetchResource(value), conversion);
} else if (value.isNumber()) {
return std::make_shared<ConstantTexture>(value.cast<float>());
} else if (value.isArray()) {
return std::make_shared<ConstantTexture>(value.cast<Vec3f>());
} else if (value.isObject()) {
std::string type = value.castField<std::string>("type");
if (type == "bitmap")
return _textureCache->fetchTexture(value, conversion, this);
else if (type == "ies")
return _textureCache->fetchIesTexture(value, this);
else
return instantiate<Texture>(value, *this);
} else {
value.parseError("Type mismatch: Expecting a texture here");
}
return nullptr;
}
std::shared_ptr<T> fetchObject(const std::vector<std::shared_ptr<T>> &list, const Scene &scene, JsonPtr value)
{
if (value.isString()) {
return findObject(list, value.cast<std::string>(), value);
} else if (value.isObject()) {
return instantiate<T>(value, scene);
} else {
value.parseError("Type mismatch: Expecting either an object or an object reference here");
return nullptr;
}
}
