Load the position of an entity

You can load (read from the state fabric) the position of an entity using an integer data structure. These examples use the following function:

Note

You must provide Api::BuiltinTypeId::Vector3F32 to Api::LoadEntityIndexKey(), as shown in the following examples.

Example using an array to represent the position

Result<void> GetEntityPosition(Api::Entity& entity, 
    Transaction& transaction)
{
    std::int8_t* dest = nullptr;
    
    WEAVERRUNTIME_TRY(Aws::WeaverRuntime::Api::LoadEntityIndexKey(
        transaction,
        entity,
        Api::BuiltinTypeIdToTypeId(
            Aws::WeaverRuntime::Api::BuiltinTypeId::Vector3F32),
        &dest));
        
    std::array<float, 3> position = 
        *reinterpret_cast<std::array<float, 3>*>(dest);
}

Example using a struct to represent the position

struct Position 
{struct
   float x;
   float y;
   float z;
};

Result<void> GetEntityPosition(Api::Entity& entity, Transaction& transaction)
{
    std::int8_t* dest = nullptr;
    
    WEAVERRUNTIME_TRY(Aws::WeaverRuntime::Api::LoadEntityIndexKey(
        transaction,
        entity,
        Api::BuiltinTypeIdToTypeId(
            Aws::WeaverRuntime::Api::BuiltinTypeId::Vector3F32),
        &dest));
        
    Position position = *reinterpret_cast<Position*>(dest);
}