C++ JSONArray::At方法代码示例

bool UnknownComponent::LoadJSON(const JSONValue& source, bool setInstanceDefault)
{
    useXML_ = true;
    xmlAttributes_.Clear();
    xmlAttributeInfos_.Clear();
    binaryAttributes_.Clear();

    JSONArray attributesArray = source.Get("attributes").GetArray();
    for (unsigned i = 0; i < attributesArray.Size(); i++)
    {
        const JSONValue& attrVal = attributesArray.At(i);

        AttributeInfo attr;
        attr.mode_ = AM_FILE;
        attr.name_ = attrVal.Get("name").GetString();
        attr.type_ = VAR_STRING;

        if (!attr.name_.Empty())
        {
            String attrValue = attrVal.Get("value").GetString();
            attr.defaultValue_ = String::EMPTY;
            xmlAttributeInfos_.Push(attr);
            xmlAttributes_.Push(attrValue);
        }
    }

    // Fix up pointers to the attributes after all have been read
    for (unsigned i = 0; i < xmlAttributeInfos_.Size(); ++i)
        xmlAttributeInfos_[i].ptr_ = &xmlAttributes_[i];

    return true;
}

bool Animation::BeginLoad(Deserializer& source)
{
    unsigned memoryUse = sizeof(Animation);

    // Check ID
    if (source.ReadFileID() != "UANI")
    {
        URHO3D_LOGERROR(source.GetName() + " is not a valid animation file");
        return false;
    }

    // Read name and length
    animationName_ = source.ReadString();
    animationNameHash_ = animationName_;
    length_ = source.ReadFloat();
    tracks_.Clear();

    unsigned tracks = source.ReadUInt();
    memoryUse += tracks * sizeof(AnimationTrack);

    // Read tracks
    for (unsigned i = 0; i < tracks; ++i)
    {
        AnimationTrack* newTrack = CreateTrack(source.ReadString());
        newTrack->channelMask_ = source.ReadUByte();

        unsigned keyFrames = source.ReadUInt();
        newTrack->keyFrames_.Resize(keyFrames);
        memoryUse += keyFrames * sizeof(AnimationKeyFrame);

        // Read keyframes of the track
        for (unsigned j = 0; j < keyFrames; ++j)
        {
            AnimationKeyFrame& newKeyFrame = newTrack->keyFrames_[j];
            newKeyFrame.time_ = source.ReadFloat();
            if (newTrack->channelMask_ & CHANNEL_POSITION)
                newKeyFrame.position_ = source.ReadVector3();
            if (newTrack->channelMask_ & CHANNEL_ROTATION)
                newKeyFrame.rotation_ = source.ReadQuaternion();
            if (newTrack->channelMask_ & CHANNEL_SCALE)
                newKeyFrame.scale_ = source.ReadVector3();
        }
    }

    // Optionally read triggers from an XML file
    ResourceCache* cache = GetSubsystem<ResourceCache>();
    String xmlName = ReplaceExtension(GetName(), ".xml");

    SharedPtr<XMLFile> file(cache->GetTempResource<XMLFile>(xmlName, false));
    if (file)
    {
        XMLElement rootElem = file->GetRoot();
        XMLElement triggerElem = rootElem.GetChild("trigger");
        while (triggerElem)
        {
            if (triggerElem.HasAttribute("normalizedtime"))
                AddTrigger(triggerElem.GetFloat("normalizedtime"), true, triggerElem.GetVariant());
            else if (triggerElem.HasAttribute("time"))
                AddTrigger(triggerElem.GetFloat("time"), false, triggerElem.GetVariant());

            triggerElem = triggerElem.GetNext("trigger");
        }

        memoryUse += triggers_.Size() * sizeof(AnimationTriggerPoint);
        SetMemoryUse(memoryUse);
        return true;
    }

    // Optionally read triggers from a JSON file
    String jsonName = ReplaceExtension(GetName(), ".json");

    SharedPtr<JSONFile> jsonFile(cache->GetTempResource<JSONFile>(jsonName, false));
    if (jsonFile)
    {
        const JSONValue& rootVal = jsonFile->GetRoot();
        JSONArray triggerArray = rootVal.Get("triggers").GetArray();

        for (unsigned i = 0; i < triggerArray.Size(); i++)
        {
            const JSONValue& triggerValue = triggerArray.At(i);
            JSONValue normalizedTimeValue = triggerValue.Get("normalizedTime");
            if (!normalizedTimeValue.IsNull())
                AddTrigger(normalizedTimeValue.GetFloat(), true, triggerValue.GetVariant());
            else
            {
                JSONValue timeVal = triggerValue.Get("time");
                if (!timeVal.IsNull())
                    AddTrigger(timeVal.GetFloat(), false, triggerValue.GetVariant());
            }
        }

        memoryUse += triggers_.Size() * sizeof(AnimationTriggerPoint);
        SetMemoryUse(memoryUse);
        return true;
    }

    SetMemoryUse(memoryUse);
    return true;
}

void Scene::PreloadResourcesJSON(const JSONValue& value)
{
    // If not threaded, can not background load resources, so rather load synchronously later when needed
#ifdef URHO3D_THREADING
    ResourceCache* cache = GetSubsystem<ResourceCache>();

    // Node or Scene attributes do not include any resources; therefore skip to the components
    JSONArray componentArray = value.Get("components").GetArray();

    for (unsigned i = 0; i < componentArray.Size(); i++)
    {
        const JSONValue& compValue = componentArray.At(i);
        String typeName = compValue.Get("type").GetString();

        const Vector<AttributeInfo>* attributes = context_->GetAttributes(StringHash(typeName));
        if (attributes)
        {
            JSONArray attributesArray = compValue.Get("attributes").GetArray();

            unsigned startIndex = 0;

            for (unsigned j = 0; j < attributesArray.Size(); j++)
            {
                const JSONValue& attrVal = attributesArray.At(j);
                String name = attrVal.Get("name").GetString();
                unsigned i = startIndex;
                unsigned attempts = attributes->Size();

                while (attempts)
                {
                    const AttributeInfo& attr = attributes->At(i);
                    if ((attr.mode_ & AM_FILE) && !attr.name_.Compare(name, true))
                    {
                        if (attr.type_ == VAR_RESOURCEREF)
                        {
                            ResourceRef ref = attrVal.Get("value").GetVariantValue(attr.type_).GetResourceRef();
                            String name = cache->SanitateResourceName(ref.name_);
                            bool success = cache->BackgroundLoadResource(ref.type_, name);
                            if (success)
                            {
                                ++asyncProgress_.totalResources_;
                                asyncProgress_.resources_.Insert(StringHash(name));
                            }
                        }
                        else if (attr.type_ == VAR_RESOURCEREFLIST)
                        {
                            ResourceRefList refList = attrVal.Get("value").GetVariantValue(attr.type_).GetResourceRefList();
                            for (unsigned k = 0; k < refList.names_.Size(); ++k)
                            {
                                String name = cache->SanitateResourceName(refList.names_[k]);
                                bool success = cache->BackgroundLoadResource(refList.type_, name);
                                if (success)
                                {
                                    ++asyncProgress_.totalResources_;
                                    asyncProgress_.resources_.Insert(StringHash(name));
                                }
                            }
                        }

                        startIndex = (i + 1) % attributes->Size();
                        break;
                    }
                    else
                    {
                        i = (i + 1) % attributes->Size();
                        --attempts;
                    }
                }

            }
        }

    }

    JSONArray childrenArray = value.Get("children").GetArray();
    for (unsigned i = 0; i < childrenArray.Size(); i++)
    {
        const JSONValue& childVal = childrenArray.At(i);
        PreloadResourcesJSON(childVal);
    }
#endif
}